Safety helmet fan system

Abstract

Various helmet fan systems are provided. In a particular embodiment, the fan system includes an impact absorbing layer having a channel defining a recessed surface extending into the impact absorbing layer away from an inner surface of a housing of the helmet. The inner surface of the housing and the recessed surface together define a conduit configured to provide fluid communication between an inlet of the channel and a vent positioned along the channel. In another embodiment, a fan system includes a mounting bracket having first and second cam levers that can be actuated to a locked position and first and second passages. When in the locked position, the first and second cam levers bias an edge of the mounting ridge of the housing against the first and second channels of the mounting bracket such that the mounting bracket is retained on the housing.

Description

[0001] Cross-references to related patent applications

[0002] This application claims the benefit of and priority to U.S. Provisional Application No. 63 / 500,808, filed on May 8, 2023, U.S. Provisional Application No. 63 / 492,679, filed on March 28, 2023, U.S. Provisional Application No. 63 / 487,121, filed on February 27, 2023, and U.S. Provisional Application No. 63 / 482,106, filed on January 30, 2023, which are incorporated herein by reference in their entireties. Technical Field

[0003] The utility model generally relates to the field of hard hats, and particularly relates to a hard hat fan system, an attachment system for a fan, a hard hat power supply for a fan or other powered hard hat accessories, a manifold system for a hard hat with a fan, and / or a sun visor attachment system for a hard hat with a fan. Background Art

[0004] Hard hats can be used in various construction work or other situations. People wearing hard hats complete a variety of tasks and manual labor. These tasks can be performed in confined spaces or outdoors, including hot and unventilated environments. In some conventional hard hats with fans, the fan is embedded in the shell or helmet and / or can be rigidly attached to the hard hat in other ways. However, the applicant has recognized that such an arrangement may provide ineffective cooling, limit the ability to attach additional accessories to the hard hat, cause uncomfortable or obstructed fan positioning, and limit the ability to adjust the fan according to the needs of multiple uses. Utility Model Content

[0005] One embodiment of the utility model relates to a fan system for a helmet. The fan system includes a housing, a fan, and an impact absorbing layer. The housing has an inner surface and an outer surface opposite to the inner surface. The fan is connected to the outer surface of the housing. The impact absorbing layer has an outer surface and an inner surface opposite to the outer surface. The outer surface of the impact absorbing layer is connected to the inner surface of the housing, and the inner surface of the impact absorbing layer defines an inner area configured to accommodate the head of the user. A concave surface is formed in the outer surface of the impact absorbing layer and defines a channel extending along the outer surface of the impact absorbing layer. The vent extends from the concave surface, passes through the impact absorbing layer, and extends to the inner surface of the impact absorbing layer. The main duct extends between the fan and the impact absorbing layer so that the main duct guides air to the inlet side of the channel. The channel is defined as an auxiliary duct between the outer surface of the impact absorbing layer and the inner surface of the housing so that air flows from the inlet side of the channel to the vent and enters the inner area. In this way, the fan system is configured to provide fluid communication for air between the outer and inner areas of the housing.

[0006] Another embodiment of the utility model relates to a fan system for a safety helmet. The fan system includes a housing, a fan, and an impact absorbing layer. The housing has an inner surface and an outer surface opposite to the inner surface. The fan is coupled to the outer surface of the housing, and the impact absorbing layer is coupled to the inner surface of the housing. The impact absorbing layer includes at least one channel and a vent extending a certain distance along the length of the impact absorbing layer. At least one channel defines a concave surface extending away from the inner surface of the housing into the impact absorbing layer. The vent is positioned along the concave surface and extends through the impact absorbing layer. The inner surface of the housing and the concave surface of the impact absorbing layer define a duct, which is configured to provide fluid communication between the inlet of the channel and the vent.

[0007] Another embodiment of the utility model relates to a helmet fan system. The fan system includes a housing, a mounting bracket, and a fan coupled to the mounting bracket. The housing is configured to accommodate a user's head and includes an outer surface and a mounting ridge extending away from the outer surface. The mounting ridge has a first edge and a second edge opposite to the first edge. The mounting bracket is configured to be firmly and removably coupled to the mounting ridge. The mounting bracket includes a mounting plate, a first channel, a second channel, a first cam bar, and a second cam bar. The mounting plate has a front surface and a back surface opposite to the front surface. The first channel is located on the back surface of the mounting plate and is configured to be coupled to the first edge of the mounting ridge. The second channel is positioned opposite to the first channel along the back surface of the mounting plate and is configured to be coupled to the second edge of the mounting ridge. The first cam bar is pivotally coupled to the front surface of the mounting plate opposite to the first channel, and the second cam bar is pivotally coupled to the front surface of the mounting plate opposite to the second channel. The first cam bar and the second cam bar are configured to actuate between an unlocked position and a locked position. Thus, when the first cam lever and the second cam lever are actuated to the locked position, the first cam lever biases the first edge of the mounting ridge against the first channel and the second cam lever biases the second edge of the mounting ridge against the second channel, so that the mounting bracket is retained on the housing.

[0008] Additional features and advantages will be set forth in the following detailed description, and in part will be apparent to those skilled in the art from the description or recognized by practicing the embodiments described in the written description and the accompanying drawings.It should be understood that both the above general description and the following detailed description are exemplary.

[0009] The accompanying drawings are included to provide a further understanding and are incorporated into and constitute a part of this specification. The accompanying drawings illustrate one or more embodiments and together with the description are used to explain the principles and operations of the various embodiments. In addition, alternative exemplary embodiments are directed to other features and combinations of features as may generally be recited in the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present application will be more fully understood from the following detailed description taken in conjunction with the accompanying drawings, in which like reference numerals refer to like elements, and in which:

[0011] Figure 1 is a front perspective view of a hard hat according to an exemplary embodiment;

[0012] Figure 2 is a rear perspective view of a hard hat according to an exemplary embodiment;

[0013] Figure 3 is a perspective view of a fan system connected to a hard hat at a rear mounting feature according to an exemplary embodiment;

[0014] Figure 4 is a perspective view of a fan system connected to a hard hat at a rear mounting feature, illustrating the positioning of an adjustment ratchet relative to a hard hat suspension system, according to an exemplary embodiment;

[0015] Figure 5 According to an exemplary embodiment Figure 3 A three-dimensional diagram of the fan system;

[0016] Figure 6 According to an exemplary embodiment Figure 3 Front view of the fan system;

[0017] Figure 7 According to an exemplary embodiment, Figure 6 A side cross-sectional view of the fan system taken along line AA;

[0018] Figure 8 is in a neutral suspension position according to an exemplary embodiment Figure 3 A three-dimensional diagram of the fan system;

[0019] Fig. 9 is in a forward tilted position according to an exemplary embodiment Figure 3 A side cross-sectional view of a fan system;

[0020] Fig.10 is in a forward tilted position according to an exemplary embodiment Figure 3 A three-dimensional diagram of the fan system;

[0021] Fig.11 is in a rearwardly tilted position according to an exemplary embodiment Figure 3 A side cross-sectional view of a fan system;

[0022] Fig.12 According to an exemplary embodiment Figure 3 A perspective view of the fan system in a rearward tilted position;

[0023] Fig.13 is a front view of a power system attached to a hard hat at a front mounting feature according to an exemplary embodiment;

[0024] Fig.14 is attached to the front of the helmet according to an exemplary embodiment Fig.13 A side perspective view of a power system coupled to deliver power to a fan system attached to a rear portion of a hard hat;

[0025] Fig.15 According to an exemplary embodiment Fig.13 A perspective view of a power system and a light attachment attached to the front of a hard hat;

[0026] Fig.16 is a rear perspective view of a hard hat with a fan and manifold system according to an exemplary embodiment;

[0027] Fig.17 According to an exemplary embodiment Fig.16 A front perspective view of a hard hat with a fan and manifold system, showing the hard hat in phantom;

[0028] Fig.18 According to an exemplary embodiment Fig.16 A rear plan view of a hard hat with a fan and manifold system;

[0029] Fig.19 According to an exemplary embodiment Fig.16 A front plan view of a hard hat with a fan and manifold system;

[0030] Fig. 20 According to an exemplary embodiment Fig.16 A bottom plan view of a hard hat with a fan and manifold system;

[0031] Fig.21 According to an exemplary embodiment Fig.16 Detailed view of the vents of the manifold system;

[0032] Fig. 22 is a rear perspective view of a hard hat with a fan and manifold system according to an exemplary embodiment;

[0033] Fig.23 According to an exemplary embodiment Fig. 22 A front perspective view of a hard hat with a fan and manifold system;

[0034] Fig.24 According to an exemplary embodiment Fig. 22 A bottom plan view of a hard hat with a fan and manifold system;

[0035] Fig.25 According to an exemplary embodiment Fig. 22 A front plan view of a hard hat with a fan and manifold system;

[0036] Fig.26 According to an exemplary embodiment Fig. 22 A rear plan view of a hard hat with a fan and manifold system;

[0037] Fig. 27 is a rear perspective view of a hard hat with a fan and manifold system according to an exemplary embodiment;

[0038] Fig.28 According to an exemplary embodiment Fig. 27 A perspective view of a fan and manifold system with a safety helmet, with a portion removed to show a cross-section of the safety helmet;

[0039] Fig.29 According to an exemplary embodiment Fig. 27 A front plan view of a hard hat with a fan and manifold system;

[0040] Fig.30 According to an exemplary embodiment Fig. 27 A rear plan view of a hard hat with a fan and manifold system;

[0041] Fig.31 is a rear perspective view of a hard hat with a fan and manifold system according to an exemplary embodiment;

[0042] Fig.32 According to an exemplary embodiment Fig.31 A bottom perspective view of a hard hat with a fan and manifold system, showing the hard hat in phantom;

[0043] Fig.33 According to an exemplary embodiment Fig.31 A bottom plan view of a hard hat with a fan and manifold system;

[0044] Fig.34 According to an exemplary embodiment Fig.33 A cross-sectional side view of a hard hat with a fan and manifold system taken along line B-B;

[0045] Fig.35 is a rear perspective view of a hard hat with a fan and manifold system according to an exemplary embodiment;

[0046] Fig.36 According to an exemplary embodiment Fig.35 A front perspective view of a hard hat with a fan and manifold system, showing the hard hat in phantom;

[0047] Fig.37 According to an exemplary embodiment Fig.35 A front perspective view of a fan and manifold system of FIG. 1 , showing the impact absorbing layer of the helmet in phantom;

[0048] Fig.38 According to an exemplary embodiment Fig.35 A side cross-sectional view of a fan and manifold system;

[0049] Fig.39 According to an exemplary embodiment Fig.35 A top plan view of a fan and manifold system of FIG. 1 , showing the impact absorbing layer of the helmet in phantom;

[0050] Fig.40 is a rear perspective view of a hard hat with a fan and manifold system according to an exemplary embodiment;

[0051] Fig.41 According to an exemplary embodiment Fig.40 A rear perspective view of a hard hat with a fan and manifold system, showing the hard hat in phantom;

[0052] Fig.42 According to an exemplary embodiment Fig.40 Rear plan view of the fan and manifold system;

[0053] Fig.43 According to an exemplary embodiment Fig.40 A front plan view of the fan and manifold system;

[0054] Fig.44 According to an exemplary embodiment Fig.40 A top plan view of a hard hat with a fan and manifold system, showing the hard hat in phantom;

[0055] Fig.45 According to an exemplary embodiment Fig.44 A side cross-sectional view of a hard hat with a fan and manifold system taken along line C-C;

[0056] Fig.46 is a rear perspective view of a fan system connected to a hard hat according to an exemplary embodiment;

[0057] Fig.47 According to an exemplary embodiment Fig.46 A rear perspective view of the fan system and helmet;

[0058] Fig.48 According to an exemplary embodiment Fig.46 Rear plan view of the fan system and helmet;

[0059] Fig.49 According to an exemplary embodiment Fig.46 A side perspective view of a fan system and a hard hat;

[0060] Fig.50 According to an exemplary embodiment Fig.46 a side plan view of the fan system and the hard hat with the fan in a downward position;

[0061] Fig.51 According to an exemplary embodiment Fig.51 A cross-sectional detailed view of the fan system and the fan with the fan in a downward position;

[0062] Fig.52 According to an exemplary embodiment Fig.46 A side plan view of the fan system and the hard hat with the fan in an upward position;

[0063] Fig.53 According to an exemplary embodiment Fig.53 A cross-sectional detailed view of the fan system and helmet with the fan in the upward position;

[0064] Fig.54 According to an exemplary embodiment Fig.46 A three-dimensional schematic diagram of a fan;

[0065] Fig.55 According to an exemplary embodiment Fig.55 A schematic cross-sectional view of a fan, wherein directional arrows indicate air flow through the fan;

[0066] Fig.56 According to an exemplary embodiment Fig.46 A rear plan view of the fan system;

[0067] Fig.57 is a perspective view of a sunshade according to an exemplary embodiment;

[0068] Fig.58 According to an exemplary embodiment, there is an attached Fig.57 A rear perspective view of the sun visor's fan system and a helmet;

[0069] Fig.59 According to an exemplary embodiment, there is an attached Fig.58 A rear plan view of the fan system of the sunshield;

[0070] Fig.60 According to an exemplary embodiment, there is an attached Fig.58 A side perspective view of a fan system of a sunshield;

[0071] Fig.61 is a detailed view of a receiving member and a receiving anchor according to an exemplary embodiment;

[0072] Fig.62 According to an exemplary embodiment, there is an attached Fig.58 A detailed view of the sunshield's fan system;

[0073] Fig.63 is a rear perspective view of a fan system connected to a hard hat according to an exemplary embodiment;

[0074] Fig.64 According to an exemplary embodiment Fig.63 Detailed side view of the fan system and helmet;

[0075] Fig.65 According to an exemplary embodiment Fig.63 An upward plan view of the fan system and helmet;

[0076] Fig.66 is taken along line DD according to an exemplary embodiment Fig.65 A cross-sectional view of the fan system and helmet;

[0077] Fig.67 According to an exemplary embodiment Fig.63 A detailed view of the fan system and the channels in the impact-absorbing layer of the helmet;

[0078] Fig.68 According to an exemplary embodiment Fig.63 A top plan view of a shock absorbing layer of a fan system;

[0079] Fig.69 According to an exemplary embodiment Fig.63 A rear perspective view of a fan system and a helmet with horizontally mounted batteries;

[0080] Fig.70 is a detailed side view of a safety helmet and a main pipe according to an exemplary embodiment;

[0081] Fig.71 is a detailed side view of a safety helmet and a main pipe according to an exemplary embodiment;

[0082] Fig.72 is a rear perspective view of a hard hat with a mounting bracket according to an exemplary embodiment;

[0083] Fig.73 According to an exemplary embodiment Fig.70 A front plan view of a mounting bracket;

[0084] Fig.74 According to an exemplary embodiment Fig.70 A rear plan view of the mounting bracket;

[0085] Fig.75 According to an exemplary embodiment Fig.70 a perspective view of a mounting bracket; and

[0086] Fig.76 According to an exemplary embodiment Fig.70 3D view of the mounting bracket. DETAILED DESCRIPTION

[0087] Referring generally to the drawings, various embodiments of a hard hat having a fan are shown.

[0088] As discussed herein, applicants have developed various fan systems and related systems, and believe that they provide various advantages over typical hard hat fans, including improved fan attachment and support for hard hats suitable for use in construction or similar construction sites. Specifically, the fan system discussed herein can utilize a fan mounting bracket, a fan hinge, and a fan frame to allow the fan to be securely attached to a hard hat. In a particular embodiment, the fan system utilizes a hinge including a stop structure that is positioned to limit the range of movement of the hinge toward the user. The hinge including a stop structure allows the user to complete dynamic movement while limiting / preventing the fan from pivoting to a position where the fan may collide with the user, a hard hat, or other equipment that the user may wear.

[0089] In addition, the structure of the hard hat fan system discussed herein is designed to provide a comfortable weight distribution over the entire hard hat. Applicants have determined that some hard hat accessory attachment arrangements may result in unbalanced or uneven / uncomfortable weight distribution. In some embodiments, the hard hat fan system discussed herein includes a power system located on the side of the hard hat opposite to the fan system. Specifically, in such an embodiment, the hard hat includes a power system located at the front of the hard hat to balance the weight of the fan system added to the rear of the hard hat.

[0090] In a specific embodiment, the power system is configured to provide lateral weight distribution and accessibility to the front accessory attachment location of the hard hat. In this embodiment, the power supply of the power system includes a first section and a second section (e.g., a left battery cell and a right battery cell) evenly spaced on both sides of the front mounting location of the hard hat, thereby providing lateral weight distribution of the hard hat. In a specific embodiment, the power supply mounting member of the power system includes an attachment device for mounting an accessory such as a light accessory to the front of the hard hat. It should be understood that although the power system discussed herein is primarily described in the context of powering a hard hat fan, the power system can be used to power a variety of powered / electronic hard hat accessories, including light sources, sensors, communication devices, auditory devices, etc.

[0091] In addition, various embodiments of the helmet system discussed herein include manifold systems. The applicant has developed various manifold systems, and it is believed that these manifold systems provide various advantages, such as improving the distribution of cooling air to the head and neck of the wearer and improving the removal of wet / hot air between the head and the helmet of the user. The applicant believes that the manifold system design discussed herein allows a variety of air routing / direction arrangements to further improve the cooling and comfort provided by the fan system. Specifically, the manifold system discussed herein utilizes the main duct attached to the fan and a plurality of vent positions to direct air to the various positions of the user's head.

[0092] In a particular embodiment, the auxiliary duct is attached to the main duct opposite the fan. The auxiliary duct extends around the lower periphery of the helmet, and the vent is attached to the auxiliary duct to provide cooling for the user's face, neck and head at the same time.

[0093] In certain other embodiments, the main duct is attached to a head liner. The head liner is designed to fit between the inner surface of the hard hat and the user's head. The liner includes a plurality of vents to direct air downward onto the user's head, thereby providing a cooling sensation to the user. The liner also helps to evacuate hot or humid air trapped inside the hard hat by pushing in ambient air from outside the hard hat.

[0094] In certain other embodiments, the helmet includes an impact absorbing layer, and the manifold system includes a plurality of auxiliary ducts embedded in the impact absorbing layer. In some embodiments, the main duct is attached to the air outlet of the fan. In such embodiments, the manifold system is configured to guide air into the helmet to exhaust hot / humid air and replace it with ambient air. Alternatively, in some embodiments, the main duct is attached to the air inlet of the fan. In such embodiments, the helmet includes a port that allows ambient air to be sucked into the helmet while the hot / humid air is extracted by the manifold system. In addition, various embodiments of the helmet system discussed herein include crossflow fans.

[0095] In addition, various embodiments of the helmet system discussed herein include a sunshade attachment system. The applicant has developed a sunshade attachment system to provide various advantages, such as allowing a sunshade to be attached to a helmet with a fan. The sunshade can provide the benefit of protecting the user's skin from ultraviolet radiation in hot and sunny environments. In this way, the sunshade can work in conjunction with the fan to provide a cooling sensation to the back of the user's neck. Specifically, the sunshade attachment system of this article includes a first accommodating member located at a first end of the brim mounting bracket, a second accommodating member located at a second end of the brim mounting bracket, and an accommodating groove along the outer edge of the brim mounting attachment. The sunshade includes a rope, a first accommodating anchor located at the first end of the rope, and a second accommodating anchor located at the second end of the rope opposite to the first accommodating anchor. Therefore, when the sunshade is connected to the sunshade attachment system, the rope is accommodated in the accommodating groove, the first accommodating anchor is accommodated in the first accommodating member, and the second accommodating anchor is accommodated in the second accommodating member. This allows the sun shield to hang behind the fan connected to the brim mount attachment and not interfere with the operation of the fan.

[0096] In addition, various embodiments of the hard hat fan system discussed herein include an impact absorbing layer, the outer surface of which is coupled to the inner surface of the hard hat. A concave surface is formed in the outer surface of the impact absorbing layer and defines a channel extending along the outer surface of the impact absorbing layer. The inner surface of the hard hat and the concave surface together define a duct that is configured to provide fluid communication between the inlet of the channel and the vent to provide air to the user's head, thereby providing a cooling sensation to the user.

[0097] Compared to some ventilated headgear, applicants believe that by utilizing a duct design in which cooling air travels in ducts defined between the impact absorbing layer and the inner surface of the headgear (as opposed to traveling through ducts completely defined within the impact absorbing layer), air movement and heat / moisture transfer away from the user's head can be improved. In addition, applicants believe that by forming a concave surface on the outer surface of the impact absorbing layer (as opposed to ducts completely defined within the impact absorbing layer), manufacturing advantages can be provided by allowing the concave surface to be easily molded on the outer surface of the impact absorbing layer.

[0098] In addition, various embodiments of the hard hat fan system discussed herein include a mounting bracket configured to be securely and removably coupled to a mounting ridge of a hard hat. Specifically, the mounting bracket includes a first channel and a second channel configured to be coupled to the mounting ridge when a first cam lever and a second cam lever bias opposite edges of the mounting ridge against inner walls of the first channel and the second channel.

[0099] Referring generally to the drawings, a protective helmet or hard hat 10 having a fan system is shown and described. Although discussed in the context of hard hat 10, the fan system discussed herein may also be applied to other protective headwear, such as protective helmets. As shown, hard hat 10 includes a housing 11 having an outer surface 15. Referring to FIG. Figure 1 , a front perspective view of the housing 11 is shown. The outer surface 15 of the hard hat 10 includes a front side surface 12 and a rear side surface 16 opposite the front side surface 12. The front side surface 12 includes a front mounting feature or location, shown as a front mounting feature 14. The front mounting feature 14 includes a mounting ridge 23. The hard hat 10 includes a bill or brim 20 that extends outward from the lower perimeter of the hard hat 10 around at least a portion of the hard hat 10 to protect the user's eyes. The hard hat 10 further includes a side attachment ridge 22 positioned along the outer surface 15 of the hard hat 10 between the front side surface 12 and the rear side surface 16.

[0100] Reference Figure 2 , a rear perspective view of a hard hat 10 according to an exemplary embodiment is shown. The rear side surface 16 includes a rear mounting location or feature 18. The rear mounting feature 18 includes a mounting ridge 24. The mounting ridge 24 is configured to accommodate a mounting bracket for hard hat accessories. The mounting ridge 24 includes a pair of dovetail protrusions or wings 26 extending outwardly from opposing flat surfaces 28, which extend from the rear mounting feature 18. The wings 26 define a first edge 25 and a second edge 27 opposite the first edge 25. In addition, or alternatively, the mounting ridge 24 includes a receiving cleat 30. The receiving cleat 30 is centered on the rear mounting feature 18 between the pair of dovetail protrusions 26. The front mounting ridge 23 is generally the same as the rear mounting ridge 24, so that mounting brackets and accessories can be mounted on the front mounting ridge and the rear mounting ridge. As shown, the rear mounting feature 18 is configured to accommodate a fan system 32.

[0101] Reference Figure 3 and Figure 4 , a fan system 32 coupled to the hard hat 10 is shown. The fan system 32 is attached to the hard hat 10 at the rear mounting feature 18. The fan system 32 includes a fan attachment system or mounting bracket 34, a support arm 35, a fan frame 36, a fan 38, and a hinge 40. The fan mounting bracket 34 is securely and removably coupled to the rear mounting feature 18, and more specifically to the mounting ridge 24. The support portion shown as the support arm 35 extends outwardly and away from the fan mounting bracket 34. The fan frame 36 is configured to accommodate the fan 38. The fan frame 36 is rotatably coupled to the outer end portion of the support arm 35 by the hinge 40.

[0102] The helmet 10 includes a strap or suspension system 42 and a ratchet system 44 that provides adjustment / tightening of the suspension system 42. Figure 4 As shown, the mounting bracket 34 and support arm 35 are sized and configured so that the fan 38 is spaced from the back of the user's head, thereby providing sufficient clearance to allow the user to reach the ratchet system 44 to adjust the hard hat 10 when the fan system 32 is attached to the hard hat 10 .

[0103] Reference Figure 5 and Figure 6 , various details of the fan system 32 are shown. The fan system 32 includes a power supply 46 and a mounting bracket 34. The mounting bracket 34 includes a locking clip or securing mechanism 48 located at a first end 50. When the mounting bracket 34 is secured to the mounting ridge 24 of the hard hat 10, the locking clip 48 is locked into a position engaged to the mounting ridge 24. The locking clip 48 limits / prevents accidental vibration or removal of the fan system 32 during use. In this configuration, the fan system 32 is securely locked to the hard hat 10. The user can disconnect the fan system 32 by moving the locking clip 48 to the unlocked position and sliding the mounting bracket 34 off the rear mounting ridge 24.

[0104] At the second end 52 of the mounting bracket 34, the mounting bracket 34 is attached to the support arm 35 by the hinge 40. The fan frame 36 is rotatably attached to the support arm 35 to allow the fan 38 to adjust to various movements of the user.

[0105] The fan system 32 includes a power source 46 (e.g., one or more battery cells). Figure 3 and Figure 5 In the illustrated embodiment, the power supply 46 is supported below the support arm 35. In this configuration, the fan system 32 includes a power supply mount 54. As shown, the power supply mount 54 is a flat support extending from the support arm 35 toward the lower end of the rear surface 16 of the hard hat 10. The power supply 46 is fixed to the power supply mount 54 and connected to the fan 38 to power it. In some embodiments, the structure of the support arm 35 is designed so that when the fan mounting bracket 34 is fixed to the hard hat 10, the inner surface of the power supply mount 54 and / or the power supply 46 abuts against the lower end of the rear surface 16 of the hard hat 10. In this position, the power supply mount 54 does not interfere with the movement of the user's head.

[0106] In some embodiments, Figure 5 and Figure 6As shown, the fan system 32 may include a power supply 47 mounted on the fan frame 36. In a particular embodiment, the power supply 47 is mounted vertically along the side surface of the fan frame 36. In this configuration, the power supply 47 is divided into a first section 56 and a second section 58. The first section 56 and the second section 58 are located on opposite sides of the fan frame 36 to evenly distribute the weight of the power supply 47 along the fan frame 36, thereby balancing the frame 36. In various embodiments, the fan system 32 includes a power supply 46 located on the power supply mount 54 and a power supply 47 mounted to the fan frame 36.

[0107] Overall reference Figures 7 to 12 , showing the details of the operation of the hinge 40. Figure 7 , a side cross-sectional view of the fan system 32 is shown. The hinge 40 rotatably couples the fan frame 36 to the support arm 35. The hinge 40 includes a rotation axis 60 and a stop structure 62. When the fan system 32 is attached to the hard hat 10, the hinge 40 allows the fan 38 to rotate along the rotation axis 60 while the mounting bracket 34 remains rigidly coupled and fixed relative to the hard hat 10.

[0108] like Fig. 9 and Fig.10 As best shown in FIG. 1 , when the hinge 40 is about to rotate forward about the rotation axis 60, the stop structure 62 of the hinge 40 acts to limit the rotation of the fan 38 in the downward direction. Specifically, the stop structure 62 can limit the movement of the fan 38 to only pitch rotation. When the wearer leans forward, the stop structure 62 engages with a portion of the fan frame 36, thereby preventing the fan frame 36 from rotating further forward about the hinge 40 toward the wearer. This arrangement allows the user to complete dynamic movement while limiting the fan 38 from pivoting to a position where the fan 38 may collide with the user, a helmet, or other equipment that the user may be wearing.

[0109] In certain embodiments, the fan system 32 includes a stop pad 64 (e.g., a foam pad) coupled to the fan frame 36 and located between the stop structure 62 and the fan frame 36. The stop pad 64 is formed of a compliant material (e.g., foam, rubber, TPE, etc.) and acts as a shock absorber by reducing the speed at which the stop structure 62 limits the movement of the fan 38 when the fan 38 reaches the swing limit specified by the stop structure 62.

[0110] Reference Figure 7 and Figure 8 , the fan system 32 is in a neutral hanging position. As shown, the user makes the fan system 32 connected to the helmet 10, and the user's head is in an upright position. In this position, the fan 38 can freely swing up or down.

[0111] Reference Fig. 9 and Fig.10 , the fan system 32 is in a forward hanging position. As shown, the user couples the fan system 32 to the helmet 10, with the user's head bent forward toward the ground. In this position, the fan 38 is restricted from moving downward, or toward the user. Specifically, as shown, when the hinge 40 rotates forward along the rotation axis 60, the fan 38 is prevented from swinging downward. The stop structure 62 presses against the foam pad 64 and prevents the hinge 40 from rotating further along the rotation axis 60.

[0112] Reference Fig.11 and Fig.12 , the fan system 32 is in a rearward hanging position. As shown, the user makes the fan system 32 connected to the helmet 10, and the user's head tilts backward toward the ground. In this position, the fan 38 is not restricted and can move freely up or down.

[0113] Overall reference Figures 13 to 15 , a power supply system 66 is shown that can be used to power the fan system 32. Figures 13 to 15 As shown in FIG. 1 , the power system 66 is located on the side of the helmet 10 opposite the fan system 32 . Fig.13 and Fig.14 , the hard hat 10 includes a front mounting feature 14 having a mounting ridge 23 and a rear mounting feature 18 having a mounting ridge 24. The fan system 32 is coupled to the hard hat 10 at the rear mounting feature 18. A power system 66 is coupled to the hard hat 10 at the front mounting feature 14. The power system 66 includes a power mount 67 and a power source 68. The power system 66 is located on the side of the hard hat 10 opposite the fan system 32 and provides a counterweight to the weight added by the fan system 32. The power system 66 is connected to the fan system 32 by a wire 69. The wire 69 can be secured to the hard hat 10 in a variety of ways. As shown, the wire 69 is secured to the side attachment ridge 22.

[0114] In the particular embodiment shown, the power source 68 includes a first section 70 and a second section 71 (e.g., a left battery cell and a right battery cell). The first section 70 and the second section 71 are evenly spaced on either side of the power source mount 67 along a lateral axis 72 of the hard hat 10. The first section 70 and the second section 71 provide lateral weight distribution for the hard hat 10. In addition, the power source mount 67 includes an accessory attachment device 73 (e.g., an elastic band). The accessory attachment device 73 extends across the power source mount 67 between the first section 70 and the second section 71 of the power source 68. The attachment device 73 is configured to accommodate additional hard hat accessories 74, such as a light (e.g., a light bulb). Fig.15 shown).

[0115] Overall reference Figures 16 to 21, shows a hard hat 10 with a fan 100 and a manifold system 110 according to an exemplary embodiment. Figures 16 to 19 , the fan 100 is coupled to the hard hat 10 at the rear mounting feature 18. The fan 100 is mounted above the lower edge 78 of the hard hat 10. Fig.19 As best shown in FIG. 1 , in various embodiments, the fan 100 does not extend below the lower edge 78 of the hard hat 10 .

[0116] Specifically, the fan 100 is coupled to a fan mounting bracket 112. The fan mounting bracket 112 is securely and removably coupled to the rear mounting feature 18, and more specifically to the mounting ridge 24. The fan 100 is coupled to the mounting bracket 112 using a mounting plate 114. The fan 100 includes a plurality of protrusions 116 to allow the fan 100 to be attached to the mounting plate 114 in different configurations or at different angles. The protrusions 116 extend from the outer surface 15 of the fan 100 and are configured to receive fasteners to attach the fan 100 to the mounting plate 114. The protrusions 116 may have different depths to allow for fasteners of different types and lengths.

[0117] Reference Fig.18 , the mounting plate 114 includes holes 115 that can be aligned with the protrusions 116 to receive fasteners and couple the mounting plate 114 to the fan 100. The mounting plate 114 can be coupled to the fan 100 by aligning at least one hole 115 with at least one protrusion 116 and securing them together with fasteners. As shown, the mounting plate 114 has a generally triangular perimeter with rounded corners, and the fan 100 includes four protrusions 116. Two protrusions 116 interface with two holes 115 of the mounting plate 114 to attach the fan 100 to the mounting bracket 112.

[0118] Reference Figures 18 to 20 , the fan 100 includes an air inlet 118 and an air outlet or exhaust port 120. Ambient air enters the fan 100 through the inlet 118 and leaves through the outlet 120. The inlet 118 is positioned and located on the front surface of the fan 100 and faces away from the outer surface 15, particularly the rear surface 16, of the housing 11. As shown, the outlet 120 is positioned and located at the bottom of the fan 100, below the inlet 118. The manifold system 110 is attached to the air outlet 120 to distribute the air from the fan 100 to the helmet 10 and around the user's head. The manifold system 110 includes a main air duct 122, an auxiliary air duct 124, and a plurality of vents 126. The main duct 122 is coupled to the outlet 120 of the fan 100. The main duct 122 can be coupled to the outlet 120 by a friction fit arrangement (e.g., by an interference fit, a snap fit, or a press fit arrangement). As shown, the air outlet 120 is accommodated in a first end 128 of the main duct 122.

[0119] The auxiliary air duct 124 is coupled to the second end 130 of the main air duct 122. As shown, the auxiliary air duct 124 is made integral with the main air duct 122, so that the main duct 122 and the auxiliary duct 124 are made of a single, continuous and continuous piece of material. The auxiliary air duct 124 delivers air from the main duct 122 to the vent 126. The auxiliary duct 122 extends below the lower edge 78 of the hard hat 10 and at least partially around the lower periphery of the hard hat 10. As shown, the auxiliary air duct 124 extends symmetrically around the neck of the user, and the shape of the auxiliary air duct 124 matches the lower periphery of the hard hat 10.

[0120] The vent 126 is an orifice or opening positioned to direct air toward the user's head and neck. The vent 126 is located in a protrusion or vent structure 127 extending from the auxiliary air duct 124. The vent structure 127 has an end 132, and the vent 126 is located in the end 132. The vent 126 is located in the end 132 to direct air from the manifold system 110 toward the user. As shown, the end 132 is generally spherical in shape.

[0121] like Fig.21 As shown in FIG. 1 , the vent structure 127 may include an airflow cap or nozzle 134 attached to the end 132. The airflow cap 134 covers the vent 126 to allow for adjustment of airflow in all directions. The airflow cap 134 may be attached by a friction fit arrangement (e.g., by a snap fit arrangement, an interference fit, etc.).

[0122] As shown, the manifold system 110 includes seven vents 126. Four vents 126 are configured to direct air toward the back of the user's head, while three vents 126 are angled downward toward the user's neck. However, the manifold system 110 may include any number of vents 126 in various arrangements and configurations.

[0123] Overall reference Figure 22 to Figure 26 , shows a hard hat 10 having a fan 200 and a manifold system 210 according to an exemplary embodiment. The fan 200 is substantially the same as the fan 100, except for the differences discussed herein, and the manifold system 210 is substantially the same as the manifold system 110, except for the differences discussed herein. Specifically, the auxiliary duct 224 of the manifold system 210 extends around the perimeter of the hard hat 10 defined by the lower edge 78.

[0124] Reference Fig. 22, shows a rear perspective view of the hard hat 10, the fan 200, and the manifold system 210. The fan 200 is coupled to the hard hat 10 at the rear mounting feature 18, above the lower edge 78 of the hard hat 10. Specifically, the fan 200 is coupled to the fan mounting bracket 212, and the fan mounting bracket 212 is mounted at the mounting ridge 24 of the hard hat 10. The fan 200 is coupled to the fan mounting bracket 212 via a mounting plate 214. The mounting plate 214 includes holes 215 configured to receive fasteners. The fan 200 includes a plurality of protrusions 216 configured to receive fasteners. The mounting plate 214 can be coupled to the fan 200 by aligning at least one hole 215 with at least one protrusion 216 and securing them together with fasteners. The protrusions 216 may have different depths to allow for fasteners of different types and lengths. As Fig. 22 and Fig.26 As shown in , the mounting plate 214 has a generally polygonal perimeter with rounded corners. At least two rounded corners include holes 215 and the angled portion extends between the two rounded corners. Two protrusions 216 with narrow depths are docked with the mounting plate 214 to attach the fan 200 to the mounting bracket 212.

[0125] Reference Figure 23 to Figure 26 , the fan 200 includes an air inlet 218 and an air outlet or exhaust port 220. The manifold system 210 is attached to the air outlet 220 to distribute the air from the fan 200 around the user's head. The manifold system 210 includes a main air duct 222, a secondary air duct 224, and a plurality of vents 226. The main duct 222 is coupled to the outlet 220 of the fan 200.

[0126] The auxiliary air duct 224 is coupled to the second end 230 of the main air duct 222. As shown, the auxiliary air duct 224 is integral with the main air duct 222. The auxiliary duct 224 of the manifold system 210 extends below the lower edge 78 of the hard hat 10. The auxiliary air duct 224 is a hollow tube that extends around the circumference of the hard hat 10. As shown, the auxiliary air duct 224 is designed to surround the top of the user's head.

[0127] The vent 226 is an orifice or opening positioned to direct air toward the user's head and neck. The vent 226 is located in a vent structure or protrusion 227 extending from the auxiliary air duct 224. The vent structure 227 has an end 232. The vent 226 is located in the end 232 to direct air from the manifold system 210 toward the user. As shown, the end 232 is generally spherical in shape. As shown in FIG. Fig.23 and Fig.24As shown in the figure, the vents 226 and vent structures 227 are evenly positioned along the auxiliary duct 224 and are intended to guide air downward to the user's face, ears, and neck. The vents 226 may include an airflow cap or nozzle attached to the spherical end 232 of the vents 226 to allow airflow to be adjusted in all directions. As shown, two vents 226 are located below the front 12 of the helmet 10 to guide air to the user's face, two vents 226 are located at the rear 16 of the helmet 10 to guide air to the user's neck, and eight vents 226 are provided below the side of the helmet 10.

[0128] In various embodiments, the manifold system 210 includes a side attachment bracket 234 to provide increased support and stability to the manifold system 210. The side attachment bracket 234 is attached on each side of the hard hat 10 and includes a lower end 236 coupled to the auxiliary air duct 224 and an upper end 238 coupled to the hard hat 10. The lower end 236 can be coupled to the auxiliary air duct 224 by a friction fit arrangement (e.g., by an interference fit, snap fit, press fit arrangement, etc.). The upper end 238 is configured to attach to the side accessory spine 22. The upper end 238 can include a clip or other attachment feature, or can be coupled to the accessory spine by a friction fit arrangement (e.g., by an interference fit, snap fit, press fit arrangement, etc.).

[0129] Overall reference Figures 27 to 30 , shows a hard hat 10 having a fan 300 and a manifold system 310 according to an exemplary embodiment. Fan 300 is substantially the same as fans 100 or 200, and manifold system 310 is substantially the same as manifold system 210, except that vents 326 are directed upward.

[0130] Reference Fig. 27 The fan 300 is coupled to the fan mounting bracket 312, and the fan mounting bracket 312 is mounted at the mounting ridge 24 of the safety helmet 10. The fan 300 is coupled to the fan mounting bracket 312 via a mounting plate 314. Fig. 27 , Fig.28 and Fig.29 As shown in , the mounting plate 314 has a generally polygonal perimeter with rounded corners. At least two rounded corners include holes 315 and the angled portion extends between the two rounded corners. Two protrusions 316 with narrow depths dock with the mounting plate 314 to attach the fan 300 to the mounting bracket 312.

[0131] Reference Figures 28 to 30, the fan 300 includes an air inlet 318 and an air outlet or exhaust port 320. A manifold system 310 is attached to the air outlet 320 to distribute the air from the fan 300 around the user's head. The manifold system 310 includes a main air duct 322, a secondary air duct 324, and a plurality of vents 326. The main duct 322 is coupled to the outlet 320 of the fan 300.

[0132] The auxiliary air duct 324 is coupled to the second end 330 of the main air duct 322. As shown, the auxiliary air duct 324 is not integral with the main air duct 322. The auxiliary duct 324 of the manifold system 310 extends below the lower edge 78 of the hard hat 10 and around the entire lower circumference of the hard hat 10. As shown, the auxiliary air duct 324 is designed to surround the top of the user's head.

[0133] Vent 326 is an orifice or opening positioned to direct air to the head and neck of the user. Vent 326 is located in a vent structure or a projection 327 extending from an auxiliary air duct 324. Vent structure 327 has an end 332. Vent 326 is located in the end 332 to direct air from manifold system 310 to the user. As shown, end 332 is generally spherical in shape. Vent structure 327 is evenly positioned along auxiliary duct 324. Vent 326 and projection 327 are intended to direct air upwards into the helmet 10 and toward the user's head. As shown, two vents 326 are located below the front 12 of the helmet 10 to direct air to the user's face, two vents 326 are located at the rear 16 of the helmet 10 to direct air to the user's neck, and eight vents 326 are provided below the side of the helmet 10.

[0134] In various embodiments, the vent structure 327 includes an air flow cap or nozzle 333 attached to an end 332 of the vent structure 327 and covering the vent 326 to allow for adjustment of air flow in all directions.

[0135] In various other embodiments, the manifold system 310 includes a side attachment bracket 334 to provide added support and stability to the manifold system 210. The side attachment bracket 334 is attached on each side of the hard hat 10 and includes a lower end 336 coupled to the auxiliary air duct 324 and an upper end 338 coupled to the hard hat 10. The upper end 338 is configured to attach to the side accessory ridge 22.

[0136] Overall reference Figure 31 to Figure 34 , shows a hard hat 10 having a fan 400 and a manifold system 410 according to an exemplary embodiment. Fan 400 is substantially the same as fans 100, 200, or 300, except for the differences discussed herein.

[0137] Reference Fig.31 , the fan 400 is coupled to the hard hat 10 at the rear mounting feature 18, above the lower edge 78 of the hard hat 10. Specifically, the fan 400 is coupled to a fan mounting bracket 412, and the fan mounting bracket 412 is mounted at the mounting ridge 24 of the hard hat 10. The fan 400 is coupled to the fan mounting bracket 412 via a mounting plate 414.

[0138] Reference Figure 32 to Figure 34 , the fan 400 includes an air inlet 418 and an air outlet or exhaust port 420. A manifold system 410 is attached to the air outlet 420 to distribute air from the fan 400 around the user's head. The manifold system 410 includes a main duct 422, a head liner 424, and a plurality of vents 426.

[0139] The main duct 422 is coupled to the outlet 420 of the fan 400. The main duct 422 can be coupled to the outlet 420 by a friction fit arrangement (e.g., by an interference fit, a snap fit, a press fit arrangement, etc.). As shown, the air outlet 420 is received in the first end 428 of the main duct 322. The main duct 422 extends below the lower edge 78 of the hard hat 10 and bends upward toward the inner surface 80 of the shell 11 of the hard hat 10. This allows the main duct 422 to transition to the head liner 424.

[0140] The head liner 424 is coupled to a second end 430 of the main duct 422 opposite the fan 400. The head liner 424 is coupled to the second end 430 by a friction fit arrangement (e.g., by an interference fit, a snap fit, a press fit arrangement, etc.). The head liner 424 is designed to fit between the inner surface 80 and the user's head. Therefore, the curvature and size of the head liner 424 are set to roughly match the inner surface 80. The head liner 424 can be made of a variety of materials, such as fabrics, elastomers, plastics, foams, etc. The head liner 424 distributes air from the main duct 422 to the vent 426. The head liner 424 is hollow to allow air to flow therethrough.

[0141] A plurality of vents 426 are openings located in the head liner 424. The vents 426 direct air downwardly toward the user's head, away from the inner surface 80 of the shell 11, to provide a cooling sensation to the user. The head liner 424 and vents 426 also help vent hot or humid air trapped inside the hard hat 10 by pushing in ambient air from outside the hard hat 10.

[0142] like Fig.34As shown in FIG, the hard hat 10 includes a foam or impact absorbing layer 434 and an open port 436. The impact absorbing layer 434 is adjacent to the inner surface 80 of the hard hat 10. The impact absorbing layer 434 is coupled to the inner surface 80. The outer shell 11 of the hard hat 10 is formed of a first material and the impact absorbing layer 434 is formed of a second material different from the first material.

[0143] The impact absorbing layer 434 includes a chamber 438 aligned with the open port 436 to allow ambient air to enter the hard hat 10 and provide an additional cooling sensation to the user. The head liner 424 is placed below the impact absorbing layer 434 and adjacent to the user's head. The head liner 424 is coupled to the impact absorbing layer 434 and has an opening 440 aligned with the chamber 438 to allow ambient air to flow to the user's head together with the air from the vent 426. The head liner 424 can be coupled to the inner surface 80 of the hard hat 10 or the impact absorbing layer 434 by any suitable attachment mechanism (e.g., adhesive, fasteners, or friction fit arrangement). The head liner 424 can also be made integral with the impact absorbing layer 434.

[0144] Overall reference Figure 35 to Figure 39 , shows a hard hat 10 having a fan 500 and a manifold system 510 according to an exemplary embodiment. Fan 500 is substantially the same as fans 100, 200, 300, or 400, except for the differences discussed herein.

[0145] Reference Fig.35 , the fan 500 is coupled to the hard hat 10 at the rear mounting feature 18, above the lower edge 78 of the hard hat 10. Specifically, the fan 500 is coupled to the fan mounting bracket 512, and the fan mounting bracket 512 is mounted at the mounting ridge 24 of the hard hat 10. The fan 500 is coupled to the fan mounting bracket 512 by a mounting plate 514. As shown, the mounting plate 514 has a generally polygonal perimeter with rounded corners. Two protrusions 516 with a narrow depth are docked with the mounting plate 514 to attach the fan 500 to the mounting bracket 512.

[0146] Reference Figure 36 to Figure 39 , the fan 500 includes an air inlet 518 and an exhaust or air outlet 520. Ambient air enters the fan 500 through the inlet 518 and exits through the outlet 520. The inlet 518 is located at the front of the fan 500. As shown, the outlet 520 is located at the bottom of the fan 500. The manifold system 510 is attached to the air outlet 520 to distribute the air from the fan 500 around the user's head. The manifold system 510 includes a main duct 522, a plurality of auxiliary ducts 524, and a plurality of vents 526.

[0147] The main duct 522 is coupled to the outlet 520 of the fan 500. The main duct 522 can be coupled to the outlet 520 by a friction fit arrangement (e.g., by an interference fit, a snap fit, a press fit arrangement, etc.). As shown, the air outlet 520 is received in a first end 528 of the main duct 522. The main duct 522 extends below the lower edge 78 of the hard hat 10 and bends upward toward the inner surface 80 of the hard hat 10. The main duct 522 includes a plurality of protrusions 530 at a second end 532 of the main duct 522. The protrusions 530 are elongated tubes coupled to the main duct 522 and configured to accommodate the auxiliary duct 524. The auxiliary duct 524 can be coupled to the protrusions 530 by a friction fit arrangement (e.g., by an interference fit, a snap fit, a press fit arrangement, etc.).

[0148] As shown, the main conduit 522 includes three protrusions 530. The protrusions 530 include outer edges 534. The protrusions 530 extend toward the inner surface 80 of the hard hat 10 and abut against the lower edge 78 of the inner surface 80.

[0149] Reference Figure 36 to Figure 39 , the hard hat 10 includes a foam or impact absorbing layer 536 and an open port 538. The impact absorbing layer 536 is helmet-shaped and fits securely within the hard hat 10. The top surface 542 of the impact absorbing layer 536 is adjacent to the inner surface 80 of the hard hat 10. The impact absorbing layer 536 can be coupled to the hard hat 10 by any suitable attachment mechanism, such as an adhesive, a fastener, or a friction fit arrangement. The impact absorbing layer 536 includes a chamber 540 extending through the impact absorbing layer 536. The chamber 540 can be aligned with the open port 538 to allow ambient air to enter the hard hat 10. As shown, the chambers 540 are polygonal in shape and are evenly spaced around the impact absorbing layer 536.

[0150] The auxiliary duct 524 is embedded in the impact absorbing layer 536. The auxiliary duct 524 extends through the impact absorbing layer 536 and terminates at the vent 526. The vent 526 is an orifice leading to the chamber 540 to provide cooling air from the fan 500 to the user's head. The auxiliary duct 524 includes a branch arm 544. The branch arm 544 allows the auxiliary duct 524 to deliver air to multiple vents 526.

[0151] As shown, the manifold system 510 includes three auxiliary conduits 524, which include six branch arms 544. Each auxiliary conduit 524 has two branch arms 544 extending into two chambers 540.

[0152] Overall reference Figures 40 to 45, a hard hat 10 is shown having a fan 600 and a manifold system 610 according to an exemplary embodiment. Fan 600 is substantially the same as fans 100, 200, 300, 400, or 500, except as discussed herein. Manifold system 610 is substantially the same as manifold system 510, except that manifold system 610 is configured to move hot / humid air out of hard hat 10 (e.g., vacuum, suck, push, pull, etc.).

[0153] Reference Fig.40 , the fan 600 is coupled to the hard hat 10 at the rear mounting feature 18, above the lower edge 78 of the hard hat 10. Specifically, the fan 600 is coupled to the fan mounting bracket 612, and the fan mounting bracket 612 is mounted at the mounting ridge 24 of the hard hat 10. The fan 600 is coupled to the fan mounting bracket 612 by a mounting plate 614. The mounting plate 614 includes a hole 615 configured to receive a fastener. The fan 600 includes a plurality of protrusions 616 configured to receive a fastener. The mounting plate 614 can be coupled to the fan 600 by aligning at least one hole 615 with at least one protrusion 616 and securing them together with a fastener. The protrusion 616 can have different depths to allow for fasteners of different types and lengths.

[0154] Reference Figure 41 to Figure 45 , the fan 600 includes an air inlet 618 and an exhaust or air outlet 620. Ambient air enters the fan 600 through the inlet 618 and exits through the outlet 620. The inlet 618 is located at the front of the fan 600. Unlike the outlet 520 of the fan 500, the outlet 620 is located along the side of the fan 600 and is angled to direct air upward from the top of the fan 600. Unlike the manifold system 510, the manifold system 610 is attached to the air inlet 618 so that the fan 600 removes hot / humid air from between the user's head and the hard hat 10.

[0155] The manifold system 610 includes a main duct 622, a plurality of auxiliary ducts 624, and a plurality of vents 626. The main duct 622 is coupled to the inlet 618 of the fan 600 at a first end 628 of the main duct 622. The main duct 622 can be coupled to the inlet 618 by a friction fit arrangement (e.g., by an interference fit, a snap fit, a press fit arrangement, etc.), or by using an adhesive or a fastener. As shown, the main duct 622 extends below the lower edge 78 of the hard hat 10 and bends upward toward the inner surface 80 of the hard hat 10. The main duct 622 includes a plurality of protrusions 630 at a second end 632 of the main duct 622. The protrusion 630 is an elongated tube coupled to the main duct 622 and configured to accommodate the auxiliary duct 624. The auxiliary duct 624 can be coupled to the protrusion 630 by a friction fit arrangement (e.g., by an interference fit, a snap fit, a press fit arrangement, etc.).

[0156] As shown, the main conduit 622 includes three protrusions 630. The protrusions 630 include an outer edge 634. The protrusions 630 extend toward the inner surface 80 of the hard hat 10 and abut the lower edge 78.

[0157] like Fig.41 As shown in Fig.45 , the hard hat 10 includes a foam or impact absorbing layer 636 and an open port 638. The impact absorbing layer 636 is helmet-shaped and fits securely within the hard hat 10. The top surface 642 of the impact absorbing layer 636 is adjacent to the inner surface 80 of the hard hat 10. The impact absorbing layer 636 can be coupled to the hard hat 10 by any suitable attachment mechanism (e.g., adhesive, fasteners, or friction fit arrangement). The impact absorbing layer 636 includes a chamber 640. The chamber 640 extends through the impact absorbing layer 636. The chamber 640 can be aligned with the open port 638 to allow ambient air to enter the hard hat 10. As shown, the chambers 640 are polygonal in shape and are evenly spaced around the impact absorbing layer 636.

[0158] The auxiliary duct 624 is embedded in the impact absorbing layer 636. The auxiliary duct 624 extends through the impact absorbing layer 636 and terminates at the vent 626. The vent 626 is an orifice to the chamber 640 to move the hot / humid air out of the chamber 640 through the manifold system 610 and out the air outlet 620. Ambient air can be drawn into the chamber 640 through the port 638 through the vacuum created. The auxiliary duct 624 includes a branch arm 644. The branch arm 644 allows the auxiliary duct 624 to deliver air to multiple vents 626.

[0159] As shown, the manifold system 610 includes three auxiliary conduits 624, which include six branch arms 644. Each auxiliary conduit 624 has two branch arms 644 extending into two chambers 640.

[0160] In various embodiments, the manifold system 610 includes a drain 646. The drain 646 is an opening or orifice located in the main conduit 622. Specifically, the drain 646 is located at the lowest point between the first end 628 and the second end 632. The drain allows moisture that enters the manifold system 610 to drain.

[0161] Overall reference Figures 46 to 62 , shows a helmet 10 having a fan 700 and a fan system 710 according to an exemplary embodiment. Figure 46 to Figure 49 The fan system 710 includes a brim mounting bracket 712 attached to the hard hat 10 , a support mount 714 detachably coupled to the brim mounting bracket 712 , and a fan 700 detachably coupled to the support mount 714 .

[0162] The brim mounting bracket 712 is attached to the hard hat 10 at the rear mounting feature 18. Specifically, the brim mounting bracket 712 is coupled to the mounting ridge 24 and the side accessory mounts 22. The brim mounting bracket 712 includes a side attachment bracket or clip 716 that is removably coupled to the side accessory ridge 22. The brim mounting bracket 712 extends outwardly from the rear 16 of the hard hat 10 and partially surrounds the side of the hard hat 10. Specifically, the brim mounting bracket 712 is generally flat and extends halfway around the hard hat 10. The brim mounting bracket 712 has a similar shape and size as the brim or bill 20. The brim mounting bracket 712 is located above the lower edge 78 of the hard hat 10.

[0163] The support mount 714 is coupled to the brim mounting bracket 712. Specifically, the support mount 714 is centered on the brim mounting bracket 714 and aligned with the receiving splint 30. The support mount 714 is coupled to an outer edge 718 of the brim mounting bracket 714. The support mount 714 can be coupled to the brim mounting bracket 712 by a friction fit arrangement (e.g., by an interference fit, a snap fit, a press fit arrangement, etc.). Fig.51 and Fig.53 As best shown in , the support mount 714 is coupled to the brim mounting bracket 712 by a snap fit. The brim mounting bracket 712 includes a protrusion 720. The protrusion 720 has an upper ridge 721. The support mount 714 has a connecting portion 722. The connecting portion 722 is configured to accommodate the protrusion 720 and is substantially the same size as the protrusion 720. The connecting portion 722 includes a lip 724 located at the open end. The lip 724 makes the open end narrower than the thickest portion of the protrusion 720. When the support mount 714 is coupled to the brim mounting bracket 712, the connecting portion 722 accommodates the protrusion 720 and the lip 724 is fixed against the upper ridge 721 to prevent translational movement. In this way, during normal operation of the fan system 710, the support mount 714 cannot be disconnected from the brim mounting bracket 712.

[0164] The fan 700 is removably coupled to the support mount 714. In the particular embodiment shown, the fan 700 is a cross flow fan and is attached to the support mount 714 horizontally relative to the hard hat. The brim mounting bracket 712 and the support mount 714 are sized and configured so that the fan 700 is spaced from the back of the user's head and generally above the lower edge 78. This spacing provides sufficient clearance to allow the user to reach the ratchet system 44 when the fan 700 is coupled to the support mount 714.

[0165] Reference Figure 50 to Figure 53, the fan 700 is attached to the support mount 714 by a hinge 726. The hinge 726 has a rotation axis 728, a first end 730, and a second end 732. The first end 730 is coupled to the support mount 714 and the second end is coupled to the fan 700. This allows a user to move the fan 700 about the rotation axis 728 to an upward position and a downward position.

[0166] Reference Fig.50 and Fig.51 , a support mount 714 is shown with the fan 700 in a downward position. The support mount 714 includes a locking structure 734. When the fan 700 is in the downward position, the hinge 726 and the fan 700 are locked in place by the locking structure 734. The first end 730 of the hinge 726 is fixed to the bottom side of the support mount 714, and the fan 700 is located below the brim mounting bracket 712. When in the downward position, the fan 700 is locked in place and can be used to provide cooling to the back of the user's neck. As shown, the locking structure 734 includes a slidable clip 736, which accommodates a portion of the first end 730 of the hinge 726 when the fan 700 moves to the downward position.

[0167] Reference Fig.52 and Fig.53 , a support mount 714 is shown with the fan 700 in an upward position. When in the upward position, the first end 730 of the hinge 726 rests on the top side 740 of the support mount 714, and the fan 700 is located above the support mount 714. When the fan 700 is in the upward position, the locking structure 734 is in the unlocked position, and the fan 700 and the hinge 726 can be disconnected from the support mount 714. In the same manner, the fan 700 can be mounted on the support mount 714 when in the unlocked position.

[0168] In various embodiments, the brim mounting bracket 712 includes a power supply mount 742. Fig.56 , two power supply mounts 742 are coupled to the brim mounting bracket 712. Each power supply mount 742 is configured to accommodate a power supply, such as a battery unit. The power supply mounts 742 may have a cover 744 to cover the power supply and secure the power supply in the power supply mount 742. In other embodiments, the brim mounting bracket 712 includes a power control 746. As shown, the power control 746 includes an actuator or button 748 that allows a user to selectively power the fan 700 by pressing the button 748 in a specified direction.

[0169] In other various embodiments, the fan 700 has an elongated body 750 extending along a longitudinal axis 751, the elongated body having a first end 752 and a second end 754 opposite the first end 752 along the longitudinal axis 751. Fig.54 ) is located at the first end 752 and is connected to the power supply mounting member 742. Fig.48 , the first end 752 and the power supply mounting member 742 are connected by a wire 758. A direction controller 760 is located at the second end 754 of the fan 700. The direction controller 760 is a dial or a knob. When the direction controller 760 is rotated in a direction about the longitudinal axis 751, the direction of the fan 700 will change. Therefore, the user can select the direction of the airflow from the fan 700 by moving the direction controller 760.

[0170] Reference Figure 57 to Figure 62 , the fan system 710 is shown with a sun shield 762 attached. The sun shield 762 provides additional cooling for the user by blocking ultraviolet radiation from reaching the back of the user's neck. Fig.57 , a sunshade 762 according to an exemplary embodiment is shown. The sunshade 762 includes a tether 764 having a first end 765 and a second end 766, a first receiving anchor 767 coupled to the first end 765, and a second receiving anchor 768 coupled to the second end 766. As shown, the receiving anchors 767, 768 are spherical with a central channel 770 that receives the tether 764 to attach the receiving anchors 767, 768 to the tether 764.

[0171] Reference Figures 58 to 60 The sun shield 762 is removably attached to the fan system 710 via a sun shield attachment system 772. The sun shield attachment system 772 includes a first receiving member 774 coupled to the brim mounting bracket 712 at a first end 775, a second receiving member 776 coupled to the brim mounting bracket at a second end 777, and a receiving groove 778. Fig.56 , the receiving groove extends along the outer edge 718 between the first end 775 and the second end 777 of the brim mounting bracket 712. The receiving groove 778 also extends along the front edge 782 of the support mount 714. As such, the receiving groove 778 is a continuous passageway for receiving the cord 764 between the first end 775 and the second end 777 of the brim mounting bracket 712. When the sun visor 762 is coupled to the sun visor attachment system 772, the cord 764 is received in the receiving groove 778, the first receiving anchor 767 is received in the first receiving member 774, and the second receiving anchor 768 is received in the second receiving member 776.

[0172] like Fig.56 and Fig.61 , the first and second receptacles 774, 776 are concave protrusions or cups with a slot 784 in the center. The slot 784 is configured to allow the cord 764 to pass through the receptacles 774, 776 when the anchors 767, 768 are attached. In this manner, the sun visor 762 is secured to the sun visor attachment system 772.

[0173] When attached to the fan system 710, the sun shield 762 hangs down from the brim mounting bracket 712 and passes over the lower edge 78 of the hard hat 10 to protect the user's neck. The sun shield 762 is spaced apart from the fan 700 so as not to interfere with the operation of the fan 700.

[0174] Overall reference Figures 63 to 71 , a hard hat fan system including a protective helmet or hard hat 10, a fan 800, and a foam or shock absorbing layer 810 is shown according to an exemplary embodiment. Fan 800 is substantially the same as fans 100, 200, 300, 400, 500, and 600, except for the differences discussed herein. Shock absorbing layer 810 is substantially the same as shock absorbing layers 434, 536, and 636, except for the differences discussed herein. Specifically, shock absorbing layer 810 includes at least one channel that defines a conduit between an outer surface of shock absorbing layer 810 and an inner surface 80 of the outer shell 11 of the hard hat 10.

[0175] As shown, the fan 800 is coupled to the outer surface 15 of the housing 11. Specifically, the fan 800 is coupled to the rear mounting feature 18 located on the rear side surface 16 of the housing 11. As shown, the fan 800 is coupled to the mounting bracket 812, and the mounting bracket 812 is coupled to the mounting ridge 24 extending from the rear side surface 16.

[0176] The fan 800 includes an air inlet 818 and an exhaust or air outlet 820. Ambient air enters the fan 800 through the inlet 818 and exits through the outlet 820. Thus, the fan 800 is configured to provide fluid communication of air between the inlet 818 and the outlet 820. The inlet 818 is positioned on the front surface of the body 802 of the fan 800 and faces away from the outer surface 15 of the housing 11. The outlet 820 is positioned at the bottom of the fan 800 below the inlet 818. The fan 800 is mounted above the lower edge 78 of the hard hat 10 so that the outlet 820 does not extend below the lower edge 78.

[0177] The fan 800 further includes a power source, shown as a battery unit 830. The battery unit 830 is configured to slidably engage with the fan 800 to provide power to the fan 800. Specifically, the battery unit 830 is housed within the body 802 of the fan 800.

[0178] As shown, the foam or impact absorbing layer 810 is coupled to the helmet 10. The impact absorbing layer is centered on the central axis 836. The impact absorbing layer 810 includes an inner surface 832 and an outer surface 834 opposite to the inner surface 832. The outer surface 834 is coupled to the inner surface 80 of the shell 11 of the helmet 10. The inner surface 832 is helmet-shaped and defines an internal area configured to accommodate the user's head. The impact absorbing layer 810 can be coupled to the helmet 10 by any suitable attachment mechanism (e.g., adhesive, fastener, or friction fit arrangement). The shell 11 is formed of a first material, and the impact absorbing layer 810 is formed of a second material different from the first material. The impact absorbing layer 810 is formed of a material selected based on the regional impact performance requirements of the helmet or protective helmet. Specifically, the impact absorbing layer 810 is made of expanded polystyrene. More specifically, the impact absorbing layer 810 is made of expanded polystyrene with a density of 1.6 pounds per cubic foot.

[0179] The impact absorbing layer 810 includes a plurality of chambers 840 extending through the impact absorbing layer 810 from the inner surface 832 to the outer surface 834. The chambers 840 may be aligned with a plurality of ports 838 located along the outer shell 11 to allow ambient air to enter the hard hat 10. As shown, the chambers 840 are polygonal in shape and are evenly spaced around the impact absorbing layer 810.

[0180] At least one concave surface 842 is formed in the outer surface 834 of the impact absorbing layer 810. Each concave surface 842 extends into the impact absorbing layer 810 away from the inner surface 80 of the shell 11. Each concave surface 842 defines at least one channel 844. Each channel 844 extends along the outer surface 834 and includes an inlet 846 and an end 848. Applicants believe that defining the channel by forming the concave surface 842 in the outer surface 834 of the impact absorbing layer 810 (rather than a conduit embedded in the impact absorbing layer 810) can provide manufacturing advantages by allowing the concave surface 842 to be easily molded on the outer surface 834.

[0181] The main duct 822 extends between the fan 800 and the impact absorbing layer 810. The main duct 822 is configured to provide fluid communication for air between the fan 800 and each channel 844. Specifically, the main duct 822 is coupled to the outlet 820 of the fan 800. The main duct 822 can be coupled to the outlet 820 by a friction fit arrangement (e.g., by an interference fit, a snap fit, or a press fit arrangement).

[0182] The main duct 822 guides air from the outlet 820 of the fan 800 to the inlet 846 of each channel 844. The first end 854 of the main duct 822 is coupled to the fan 800, and the second end 856 abuts against the inner surface 832 of the impact absorbing layer 810 around the inlet 846. In a particular embodiment, the impact absorbing layer 810 and the main duct 822 have a small overlap to reduce air leakage between the impact absorbing layer 810 and the main duct 822. The main duct 822 extends below and around the lower edge 78 of the hard hat 10 so that the main duct 822 does not contact the lower edge 78. In this way, the fan 800, the mounting bracket 812, and the main duct 822 can be removably coupled to the hard hat 10.

[0183] Each channel 844 defines an auxiliary duct between the outer surface 834 of the impact absorbing layer 810 and the inner surface 80 of the shell 11. At least one vent 850 is located along each channel 844. The vent 850 extends through each concave surface 842. The vent 850 is an opening configured to provide air to the user's head. The vent 850 extends from the concave surface 842 through the impact absorbing layer 810 to the inner surface 832.

[0184] Auxiliary ducts defined between the outer surface 834 of the impact absorbing layer 810 and the inner surface 80 of the hard hat 10 provide fluid communication between the inlet 846 and the vent 850. Thus, air flows from the inlet 846 along each channel 844 to the vent 850 and into the interior area defined by the impact absorbing layer 810.

[0185] Thus, the hard hat fan system is configured to provide fluid communication for air between the exterior and interior areas of the housing 11 so as to provide a cooling sensation to the user when the user's head is located within the interior area. Specifically, air flows from the inlet 818 of the fan 800 through the outlet 820 of the fan via the secondary duct defined by the channel 844 and the vent 850 into the main duct 822. Applicants believe that by providing a duct defined between the outer surface 834 of the impact absorbing layer 810 and the inner surface 80 of the housing 15, rather than a duct embedded within the impact absorbing layer 810, air movement and heat / moisture transfer away from the user's head can be improved.

[0186] In certain embodiments, the housing 11 includes an uninterrupted surface along each channel 844 such that there is no opening extending between the recessed surface 842 and the outer surface 15 of the housing 11. Specifically, no port 838 is located above the channel 844 along the housing 11. Additionally, the chamber 840 does not intersect the channel 844. Thus, each channel 844 is separate and distinct from each other and from the chamber 840.

[0187] Reference Fig.68, the impact absorbing layer 810 includes two channels 844, one on each side of the central axis 836. Each channel 844 extends from an inlet 846 to an end 848 along the length of the impact absorbing layer 810. The channels 844 terminate within the impact absorbing layer 810 such that the end 848 of each channel 844 is spaced apart from the outer periphery of the impact absorbing layer 810.

[0188] The channel 844 has a length defined between the inlet 846 and the end 848 that is less than the length of the impact absorbing layer 810 defined along the central axis 836. In a particular embodiment, the length of the channel 844 is at least 50% of the length of the impact absorbing layer 810. More specifically, the channel length is at most 90% of the length of the impact absorbing layer 810. In another embodiment, the channel length is between 60% and 70% of the length of the impact absorbing layer 810. In a particular embodiment, the length of the impact absorbing layer 810 is at least 9 inches and at most 10 inches, and the length of the channel 844 is at least 6 inches and at most 7 inches.

[0189] Each inlet 846 defines a first channel width 860 and each end 848 defines a second channel width 862. In certain embodiments, the first channel width 860 is greater than the second channel width 862. Thus, the inlet 846 has a greater width than the end 848.

[0190] As shown, each channel 844 includes a plurality of curved portions between an inlet 846 and an end 848. Specifically, the inlet 846 of each channel 844 is closer to the central axis 836 than the end 848 of each channel 844. Each channel 844 includes a first or inlet portion 870 extending from the inlet 846 and a second or end portion 872 extending from the end 848. An intermediate portion 874 extends between the inlet portion 870 and the end portion 872.

[0191] In a specific embodiment, the inlet portion 870 of the channel 844 is curved toward the central axis 836. Therefore, the two inlet portions 870 are concave relative to each other. In another specific embodiment, the end portions 872 are curved away from the central axis 836. Therefore, the two end portions 872 are convex relative to each other. In another specific embodiment, the middle portion 874 of each channel 844 includes two bends. Therefore, at least a portion of the middle portion 874 is concave relative to each other, and at least a portion of the middle portion 874 is convex relative to each other.

[0192] As shown, each channel 844 includes three vents 850 spaced apart along the channel 844. One vent 850 on each channel 844 is located within the end portion 872 and adjacent to the end 848. The other vents 850 are located within the middle portion 874.

[0193] Reference Figure 71 to Figure 72 The fan 800 is configured to be retrofittable with different main ducts to accommodate different helmets. Fig.71 As shown in Fig.72 , an alternative embodiment of the main duct may be attached to the outlet 820 of the fan 800 .

[0194] Reference Fig.71 , hard hat 900 is shown having a main duct 922 coupled to fan 800. Hard hat 900 is substantially the same as hard hat 10, except that it includes a partial brim 920 surrounding rear surface 916. Main duct 922 is substantially the same as main duct 822, except that main duct 922 abuts against a portion of the brim before bending toward lower edge 978. In certain embodiments, the main duct can extend below lower edge 978 and abut the impact absorbing layer.

[0195] Reference Fig.72 , hard hat 10 is shown with a main duct 1022 coupled to fan 800. Hard hat 1000 is substantially the same as hard hats 10 and 900, except that it includes a full brim 1020 around rear surface 1016. Main duct 1022 is substantially the same as main ducts 822 and 922, except that main duct 1022 extends along full brim 1020 before bending toward and around lower edge 1078. As shown, main duct 1022 is spaced apart from full brim 1020. In certain embodiments, main duct 1022 can extend below lower edge 1078 and against the impact absorbing layer.

[0196] Overall reference Figure 72 to Figure 76 , a hard hat 10 is shown with a mounting bracket 1112 according to an exemplary embodiment. Except for the differences discussed herein, the mounting bracket 1112 is substantially similar to mounting brackets 112, 212, 312, 412, 512, 612, and 812. The mounting bracket 1112 can be used to couple a fan (such as fans 100, 200, 300, 400, 500, 600, and 800) or another hard hat accessory to a hard hat or protective helmet.

[0197] The mounting bracket 1112 is securely and removably coupled to the mounting spine 24, and more specifically, to the first edge 25 and the second edge 27. The mounting bracket 1112 includes a mounting plate 1114. The mounting plate 1114 includes a front surface 1116 and a back surface 1118 opposite the front surface 1116. The mounting plate 1114 extends along a longitudinal axis 1115.

[0198] The first cam lock 1120 and the second cam lock 1122 are coupled to the front surface 1116 of the mounting plate 1114. The first cam lock 1120 is located on the first end 1121 of the mounting plate 1114 and the second cam lock 1122 is located on the second end 1123 of the mounting plate 1114.

[0199] The center portion 1125 is located on the front surface 1116 between the first cam lock 1120 and the second cam lock 1122. The center portion 1125 extends in a direction away from the front surface 1116 and away from the back surface 1118. The center portion 1125 includes an opening 1124. The opening 1124 extends through the front surface 1116 to the back surface 1118 and is configured to receive a fastener to couple a fan or other accessory to the mounting bracket 1112.

[0200] The first cam lock 1120 includes a retainer 1126 and a first cam lever 1128. The first cam lever 1128 is pivotally coupled to the front surface 1116. The first cam lever 1128 is configured to actuate between a locked position and an unlocked position. The first cam lever 1128 actuates along a pivot axis 1150 that is parallel to the longitudinal axis 1115.

[0201] Specifically, the first cam bar 1128 is rotatably coupled to the retainer 1126. The retainers 1126 are coupled to the front surface 1116 and are substantially parallel to each other. Each retainer 1126 extends in a direction away from the front surface 1116. The first cam bar 1128 is at least partially retained in the first slot 1129 so that the first cam bar 1128 at least partially extends through the mounting plate 1114. The first slot 1129 extends from the front surface 1116 through the mounting plate 1114 to the back surface 1118.

[0202] Specifically, when the first cam bar 1128 moves to the locked position, a portion of the first cam bar 1128 extends from the front surface 1116 and through the back surface 1118. As such, when in the locked position, a portion of the first cam bar 1128 extends through the first slot 1129 and is completely surrounded by the mounting plate 1114. That is, a portion of the first cam bar 1128 is surrounded on at least three sides by the mounting plate 1114. As shown, when in the locked position, the first protrusion 1117 of the first cam bar 1128 abuts against the front surface 1116 and is flush against the front surface 1116.

[0203] Similar to the first cam lock 1120, the second cam lock 1122 includes a retainer 1130 and a second cam lever 1132. The second cam lever 1132 is pivotally coupled to the front surface 1116. The second cam lever 1132 is configured to actuate between a locked position and an unlocked position. The second cam lever 1132 actuates along a pivot axis 1151 parallel to the longitudinal axis 1115.

[0204] Specifically, the second cam rod 1132 is rotatably coupled to the retainer 1130. The retainers 1130 are coupled to the front surface 1116 and are substantially parallel to each other. Each retainer 1130 extends in a direction away from the front surface 1116. The second cam rod 1132 is at least partially retained in the second slot 1131, so that the second cam rod 1132 at least partially extends through the mounting plate 1114. The second slot 1131 extends from the front surface 1116 through the mounting plate 1114 to the back surface 1118.

[0205] Specifically, when the cam lever moves to the locked position, a portion of the second cam lever 1132 extends from the front surface 1116 and passes through the back surface 1118. Thus, when in the locked position, a portion of the second cam lever 1132 extends through the second slot 1131 and is completely surrounded by the mounting plate 1114. That is, a portion of the second cam lever 1132 is surrounded on at least three sides by the mounting plate 1114. When in the locked position, the second protrusion 1119 of the second cam lever 1132 abuts against the front surface 1116 and is flat against the front surface 1116.

[0206] The back surface 1118 includes a first protrusion 1134 defining a first channel 1136 and a second protrusion 1138 defining a second channel 1140. The first protrusion 1134 and the second protrusion 1138 are coupled to the back surface 1118 and extend away from the back surface. The first protrusion 1134 and the second protrusion 1138 extend in a direction away from the back surface 1118 and away from the front surface 1116.

[0207] The first protrusion 1134 and the first channel 1136 are located on the first end 1121 along the back surface 1118 opposite the first cam lock 1120. The first channel 1136 is configured to couple to the first edge 25 of the mounting ridge 24. The second protrusion 1138 and the second channel 1140 are located on the second end 1123 opposite the second cam lock 1122. The second channel 1140 is configured to couple to the second edge 27 of the mounting ridge 24.

[0208] When the mounting bracket 1112 is mounted on the mounting ridge 24, the first cam bar 1128 and the second cam bar 1132 are actuated to the locked position. When actuated to the locked position, the first cam bar 1128 biases the first edge 25 of the mounting ridge 24 against the first channel 1136, and the second cam bar 1132 biases the second edge 27 of the mounting ridge 24 against the second channel 1140, so that the mounting bracket 1112 is fixed on the shell 11 of the hard hat 10.

[0209] The first cam bar 1128 and the second cam bar 1132 may be user-actuated or spring-loaded. When user-actuated, the user moves the first cam bar 1128 and the second cam bar 1132 to the locked position when the mounting bracket 1112 is mounted on the mounting spine 24. To remove the mounting bracket 1112, the user actuates the first cam bar 1128 and the second cam bar 1132 to the unlocked position to disengage the mounting bracket 1112 from the mounting spine 24.

[0210] When the spring is loaded, the first cam bar 1128 and the second cam bar 1132 are actuated by the spring. In such an embodiment, the first cam lock 1120 includes a first spring (not shown) and the second cam lock 1122 includes a second spring (not shown). The first spring and the second spring are configured to bias the first cam bar 1128 and the second cam bar 1132 to a locked position. In this way, when the first cam lock 1120 and the second cam lock 1122 are pressed against the mounting ridge 24, the spring actuates the first cam bar 1128 and the second cam bar 1132 to the locked position to retain the mounting bracket 1112 on the mounting ridge 24. To remove the mounting bracket 1112, the user actuates the first cam bar 1128 and the second cam bar 1132 to the unlocked position, compressing the first spring and the second spring, and allowing the mounting bracket 1112 to disengage from the mounting ridge 24.

[0211] The mounting bracket 1112 further includes a clip 1142. The clip 1142 is configured to engage the receiving clamp plate 30 to help retain the mounting bracket 1112 on the mounting spine 24. The clip 1142 is located between the first channel 1136 and the second channel 1140. Specifically, the clip 1142 is centered on the mounting plate 1114 between the first end 1121 and the second end 1123. The clip 1142 is coupled to the front surface 1116 and extends below the mounting plate 1114.

[0212] As shown, the mounting bracket 1112 includes a first side ridge 1144 and a second side ridge 1146. The first side ridge 1144 and the second side ridge 1146 are configured to engage the outer surface 15 of the housing 11 when the mounting bracket 1112 is coupled to the mounting ridge 24.

[0213] The first side ridge 1144 is located on the first end 1121 of the mounting plate 1114. The first side ridge 1144 is adjacent to the first protrusion 1134 and the first channel 1136. The first side ridge 1144 extends in a direction away from the back surface 1118 of the mounting plate 1114. As shown, the first side ridge 1144 includes a ribbed surface having a plurality of ribs. The ribbed surface provides a gripping surface to help the user install the mounting bracket 1112 on the housing 11 and remove the mounting bracket from the housing.

[0214] The second side ridge 1146 is located on the second end 1123 of the mounting plate 1114. The second side ridge 1146 is adjacent to the second protrusion 1138 and the second channel 1140. The second side ridge 1146 extends in a direction away from the back surface 1118 of the mounting plate 1114. As shown, the second side ridge 1146 includes a ribbed surface having a plurality of ribs. The ribbed surface provides a gripping surface to help the user install the mounting bracket 1112 on the housing 11 and remove the mounting bracket from the housing.

[0215] It should be understood that the drawings show exemplary embodiments in detail, and it should be understood that the present application is not limited to the details or methods set forth in the specification or shown in the drawings. It should also be understood that the terminology is for descriptive purposes only and should not be considered as limiting.

[0216] In view of this specification, further modifications and alternative embodiments of various aspects of the utility model will be obvious to those skilled in the art. Therefore, this specification should be interpreted as being only illustrative. The construction and arrangement shown in different exemplary embodiments are only illustrative. Although only several embodiments are described in detail in this disclosure, many modifications (for example, the size, size, structure, shape and ratio of various elements, parameter values, installation arrangements, use of materials, colors, orientations, etc.) can be made without substantially departing from the novel teaching content and advantages of the subject matter described herein. Some elements shown as being integrally formed can be constructed of multiple parts or elements, the position of the elements can be reversed or otherwise changed, and the nature or quantity or position of discrete elements can be changed or changed. According to alternative embodiments, the order or sequence of any process, logic algorithm or method steps can be changed or reordered. Without departing from the scope of the utility model, other replacements, modifications, changes and omissions can also be made in the design, operating conditions and arrangement of multiple different exemplary embodiments.

[0217] Unless otherwise expressly stated, it is not intended in any way that any method set forth herein be interpreted as requiring that its steps be performed in a specified order. Accordingly, in the absence of an actual enumeration of the order in which its steps should be followed in a method claim or in the absence of a specific statement in the claim or specification that the steps should be limited to a particular order, it is by no means intended that any particular order can be inferred. In addition, the article "a" used herein is intended to include one or more components or elements and is not intended to be interpreted as only one.

[0218] For the purposes of this disclosure, the term "coupled" means that two components are directly or indirectly connected to each other. Such connection may be fixed in nature, or removable in nature. Such connection may be achieved by the two components and any additional intermediate components being integrally formed with each other as a single unitary body, or by the two components or the two components and any additional components being attached to each other. Such connection may be permanent in nature, or alternatively may be removable or releasable in nature.

[0219] In various exemplary embodiments, relative dimensions, including angles, lengths, and radii, are proportional as shown in the drawings. Actual measurements of the drawings will disclose the relative dimensions, angles, and ratios of a number of different exemplary embodiments. Different exemplary embodiments extend to various ranges around absolute and relative dimensions, angles, and ratios that can be determined from the drawings. Different exemplary embodiments include any combination of one or more relative dimensions or angles that can be determined from the drawings. Further, actual dimensions not explicitly stated in this specification may be determined by using ratios of dimensions measured in the drawings in combination with explicit dimensions stated in this specification.

[0220] Although the present application describes a specific combination of features in the appended claims, different embodiments of the present invention relate to any combination of any features described herein (whether or not such combination is currently required), and any such combination of features may be claimed in this application or in future applications. Any feature, element or component of any exemplary embodiment discussed above may be used alone or in combination with any feature, element or component of any other embodiment discussed above.

Claims

1. A helmet fan system, comprising: a housing having an inner surface and an outer surface opposite the inner surface; a fan coupled to an outer surface of the housing; A shock absorbing layer, the shock absorbing layer comprising: an outer surface coupled to the inner surface of the housing; an inner surface opposite the outer surface of the impact absorbing layer, the inner surface of the impact absorbing layer defining an inner region configured to receive a head of a user; a concave surface formed in the outer surface of the impact absorbing layer, the concave surface defining a channel extending along the outer surface of the impact absorbing layer; and a vent extending from the concave surface, through the impact absorbing layer, and to an inner surface of the impact absorbing layer; and a main duct extending between the fan and the impact absorbing layer, the main duct directing air to an inlet side of the passage; wherein the channel defines a secondary duct between an outer surface of the impact absorbing layer and an inner surface of the outer shell such that air flows from an inlet side of the channel to the vent and into the interior region; and Wherein the hard hat fan system is configured to provide fluid communication for air between the exterior of the housing and the interior area.

2. The helmet fan system according to claim 1, wherein: The fan includes an inlet positioned on a front surface of the fan facing away from an outer surface of the housing and an outlet positioned on a bottom of the fan below the inlet.

3. The helmet fan system of claim 2, wherein: A first end of the main duct is coupled to an outlet of the fan, and a second end of the main duct opposite to the first end abuts against an inner surface of the impact absorbing layer.

4. The helmet fan system of claim 1, wherein: The outer shell is formed of a first material, and the impact absorbing layer is formed of a second material different from the first material.

5. The helmet fan system of claim 1, wherein: The channel terminates within the impact absorbing layer such that an end portion of the channel is spaced apart from an outer periphery of the impact absorbing layer.

6. The helmet fan system of claim 5, wherein: The vent is located in an end portion of the channel.

7. The helmet fan system of claim 5, wherein: The channel has a length defined between the inlet side and the end portion that is less than a length of the impact absorbing layer defined along a central axis of the impact absorbing layer.

8. The helmet fan system of claim 1, wherein: The housing includes an uninterrupted surface along the passageway such that no openings extend between the concave surface and the outer surface of the housing.

9. A helmet fan system, comprising: a housing having an inner surface and an outer surface opposite the inner surface; a fan coupled to an outer surface of the housing; as well as an impact absorbing layer coupled to an inner surface of the outer shell; the impact absorbing layer comprising: at least one channel extending a distance along the length of the impact absorbing layer, the at least one channel defining a concave surface extending into the impact absorbing layer and away from the inner surface of the outer shell; and a vent positioned along the concave surface and extending through the impact absorbing layer; Wherein, the inner surface of the shell and the concave surface of the impact absorbing layer define a duct configured to provide fluid communication between the inlet of the channel and the vent.

10. The helmet fan system of claim 9, wherein: The at least one channel terminates within the impact absorbing layer such that an end of the channel is spaced apart from an outer perimeter of the impact absorbing layer.

11. The helmet fan system of claim 10, wherein: The width of the entrance of the at least one channel is greater than the width of the end of the at least one channel.

12. The helmet fan system of claim 10, wherein: The at least one channel includes a plurality of bends between the inlet and the end.

13. The hard hat fan system of claim 10, wherein: The impact absorbing layer is centered on and extends along a central axis, wherein the at least one channel is a first channel, and wherein an inlet of the first channel is closer to the central axis than an end of the first channel.

14. The hard hat fan system of claim 13, wherein: The first channel includes a first portion extending from an inlet of the first channel and a second portion extending from an end of the first channel, and further includes a second channel, wherein the second channel includes a third portion extending from the inlet of the second channel and a fourth portion extending from the end of the second channel.

15. The hard hat fan system of claim 14, wherein: The first portion and the third portion are recessed relative to each other.

16. The hard hat fan system of claim 15, wherein: The second portion and the fourth portion protrude relative to each other.

17. The hard hat fan system of claim 9, wherein: The housing includes an uninterrupted surface along the passageway such that no openings extend between the concave surface and the outer surface of the housing.

18. A helmet fan system, comprising: A housing configured to accommodate a user's head, the housing comprising: External surface; and a mounting ridge extending away from the outer surface, the mounting ridge having a first edge and a second edge opposite the first edge; A mounting bracket configured to be securely and removably coupled to the mounting ridge, the mounting bracket comprising: a mounting plate having a front surface and a back surface opposite the front surface; a first channel on a backside surface of the mounting plate, the first channel configured to couple to a first edge of the mounting ridge; a second channel along the back surface of the mounting plate opposite the first channel, the second channel configured to couple to a second edge of the mounting ridge; a first cam lever pivotally coupled to a front surface of the mounting plate opposite the first channel; and a second cam lever pivotally coupled to a front surface of the mounting plate opposite the second channel, wherein the first cam lever and the second cam lever are configured to actuate between an unlocked position and a locked position; and a fan coupled to the mounting bracket; Wherein, when the first cam rod and the second cam rod are actuated to the locking position, the first cam rod biases the first edge of the mounting ridge against the first channel, and the second cam rod biases the second edge of the mounting ridge against the second channel, so that the mounting bracket is fixed on the housing.

19. The hard hat fan system of claim 18, wherein: The mounting plate extends along a longitudinal axis, the first cam lever actuates along a first pivot axis, and the second cam lever actuates along a second pivot axis, and wherein the first pivot axis and the second pivot axis are parallel to the longitudinal axis of the mounting plate.

20. The hard hat fan system of claim 18, wherein: The mounting bracket further comprises: a first side ridge adjacent the first channel, the first side ridge extending away from the back surface of the mounting plate; and a second side ridge adjacent the second channel, the second side ridge extending away from the back surface of the mounting plate; Wherein the first side ridge and the second side ridge are configured to engage with an outer surface of the housing when the mounting bracket is coupled to the mounting ridges.

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