Vacuum assisted system and method for hair cutting

Abstract

In one embodiment disclosed herein, a hair cutting system includes a vacuum canister, a hose, and a handheld device. The hose is secured to the vacuum canister and the handheld device and is in fluid communication therewith. The handheld device includes a vacuum chamber. A device for generating a vacuum is located within the vacuum canister, and the vacuum is propagated to the vacuum chamber through the hose. The system may further include a heating element and a fan for heating and moving air into the vacuum chamber. In one embodiment disclosed herein, a hair cutting method includes the steps of placing a portion of hair within the vacuum chamber; applying a vacuum to remove excess moisture from the hair; and applying heated air to the portion of hair.

Description

[0001] This application is a divisional application of application number 201580075175.1, application date December 2, 2015, and invention name “A vacuum-assisted system and method for hair cutting”. Technical Field

[0002] The present invention relates to systems, apparatus and methods for cutting hair, and more particularly to systems, apparatus and methods for using suction created by a vacuum to dry, style and cleanse hair. Background Art

[0003] Human hair cutting is a common and important activity. The common routine of hair cutting includes washing, drying and styling the hair. Such a routine is particularly common for individuals with relatively long hair. It is very common for individuals to wash their hair through a shampooing process and then use a conventional hair dryer to dry the hair. Although blow drying human hair with a hair dryer has been a common practice for decades, blow drying hair with a hair dryer can cause damage to the physical structure of human hair. Hair is a fiber filament composed of protein, and each strand of hair is composed of three layers - medulla, an inner layer; cortex, a middle layer; and cuticle, an outer layer. The medulla is generally an unstructured area in the middle of each strand of hair. The cortex, which surrounds the medulla, is an important layer because it provides each strand of hair with its mechanical strength and absorbs moisture required for healthy hair. The cortex also contains melanin, which determines the color of the hair. The general shape of the cortex contributes to the general shape of each strand of hair, such as whether the hair is straight, wavy or curly. The cuticle protects the medulla and cortex from environmental damage. Because the medulla and cortex are sensitive to damage, the cuticle plays an important role in maintaining the health of each strand of hair.

[0004] The cuticle is composed of a series of cells that are usually arranged in sequence along the length of each strand of hair from the root of each strand to the exposed end of each strand. These cells work together to prevent damage to the internal structure of the hair and to maintain and control the moisture content of each strand of hair. When using a traditional hair dryer to dry hair, the hot air directed at the hair can cause the cells of the cuticle to open outward, exposing the cortex to the hot air. These exposures can damage the cortex by disrupting the structure of the cortex and removing the moisture stored in the cortex that is necessary for healthy hair. These damages often cause the hair to look dry and dull, and retain static electricity, which can cause the unwelcome appearance often referred to as "rough" hair.

[0005] Additionally, people often desire hair that is straight and has smooth tips. To achieve this look, people often apply heated flat irons to already dried hair. However, the application of heat can also cause temporary changes in the hair structure, including altering the hydrogen bonds that structurally support the individual strands of hair. These structural changes can weaken the hair, causing a dull appearance, and these temporary changes can cause permanent damage to the individual strands of hair over time.

[0006] Alternatively, when the goal is to achieve curly or wavy hair, any number of styling devices are used, usually in conjunction with a hair dryer, to blow wet hair into dry curls or waves. These methods involve directing a stream of hot air at the hair from different angles while giving the hair different finishes. These treatments often cause damage to the styled hair. There are also many types of heated styling tools, including curling irons and curling tongs that are often used on dry hair. However, these methods can also cause damage because the hair is in direct contact with a heating element that intensifies the heat applied to each strand of hair.

[0007] The barbering industry requires hair cutting systems, instruments and methods that are less damaging, faster, simpler and more effective than traditional hair cutting methods. Summary of the invention

[0008] In one embodiment disclosed herein, a hair cutting system includes a vacuum canister, a hose, and a handheld device. The hose is secured to the vacuum canister and the handheld device and is in fluid communication therewith. The handheld device includes a vacuum chamber. A device for generating a vacuum is located within the vacuum canister, and the vacuum is propagated to the vacuum chamber through the hose. The system may further include a heating element and a fan for heating and moving air into the vacuum chamber. In one embodiment disclosed herein, a hair cutting method includes the steps of placing a portion of hair within the vacuum chamber; applying a vacuum to remove excess moisture from the hair; and applying heated air to the portion of hair. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The structures shown in the accompanying drawings, together with the detailed description provided below, describe exemplary embodiments of the invention claimed. Where appropriate, identical elements are identified by identical or similar reference numbers. Elements shown as a single component may be replaced by multiple components. Elements shown as multiple components may be replaced by a single component. The accompanying drawings may not be to scale. The proportions of certain elements may be exaggerated for illustrative purposes.

[0010] Figure 1 is a schematic diagram depicting a front perspective view of a hair cutting system disclosed herein;

[0011] Figure 2 It is a depiction Figure 1 a schematic diagram of a rear perspective view of a hair cutting system;

[0012] Figure 3It is a depiction Figure 1 A schematic diagram of a front perspective view of a handheld device of a hair cutting system;

[0013] Figure 4 It is a depiction Figure 1 A schematic diagram of a rear perspective view of a handheld device of a hair cutting system;

[0014] Figure 5 It is a depiction Figure 1 A schematic diagram of a front view of a handheld device of a hair cutting system;

[0015] Figure 6 It is a depiction Figure 5 A schematic diagram of a cross-sectional view of a handheld device of a hair cutting system taken along line AA;

[0016] Figure 7 is a schematic diagram depicting a front view of another handheld device for use with the hair cutting system;

[0017] Figure 8 It is a depiction Figure 7 Handheld devices Figure 7 A schematic diagram of a cross-sectional view taken along line BB;

[0018] Fig. 9 is a schematic diagram depicting a front view of another handheld device for use with the hair cutting system;

[0019] Fig.10 It is a depiction Fig. 9 Handheld devices Fig. 9 A schematic diagram of a cross-sectional view taken along line CC;

[0020] Fig.11 is a schematic diagram depicting a front view of another handheld device for use with the hair cutting system;

[0021] Fig.12 It is a depiction Fig.11 Handheld devices Fig.11 A schematic diagram of a cross-sectional view taken along line DD;

[0022] Fig.13 is a schematic diagram depicting a cross-sectional view of a vacuum chamber for use with the hair cutting system disclosed herein;

[0023] Fig.14 is a schematic diagram depicting a side view of a vacuum chamber for use with the hair cutting system disclosed herein;

[0024] Fig.15 It is a depiction Fig.14 Vacuum chamber edge Fig.14 A schematic diagram of a cross-sectional view taken along line EE;

[0025] Fig.16 It is a depiction Fig.14 Vacuum chamber edge Fig.14 A schematic diagram of a cross-sectional view taken along line FF;

[0026] Fig.17 It is a depiction Fig.14 A schematic diagram of a front view of a vacuum chamber;

[0027] Fig.18 is a schematic diagram depicting a side view of a flow conditioner for use with the hair cutting system disclosed herein;

[0028] Fig.19 It is a depiction Fig.18 Flow conditioner along Fig.18 A schematic diagram of a cross-sectional view taken along line GG;

[0029] Fig. 20 It is a depiction Fig.18 a schematic diagram of a front view of a flow conditioner;

[0030] Fig.21 is a schematic diagram depicting a side view of another flow conditioner for use with the hair cutting system disclosed herein;

[0031] Fig. 22 It is a depiction Fig.21 Flow conditioner along Fig.21 A schematic diagram of a cross-sectional view taken along line HH;

[0032] Fig.23 It is a depiction Fig.21 a schematic diagram of a front view of a flow conditioner;

[0033] Fig.24 is a schematic diagram depicting a cross-sectional view of a handheld device inserted into a vacuum chamber along with a flow conditioner;

[0034] Fig.25 is a schematic diagram depicting a rear perspective view of a handheld device for use with the hair cutting system disclosed herein;

[0035] Fig.26 It is a depiction Fig.25 a schematic diagram of a front perspective view of a handheld device;

[0036] Fig. 27 It is a depiction Fig.25 a schematic diagram of a cross-sectional view of a handheld device; and

[0037] Fig.28 is a schematic diagram depicting a front perspective view of a handheld device for use with the hair cutting system disclosed herein. DETAILED DESCRIPTION

[0038] The systems, arrangements, and methods disclosed herein are described in detail by way of examples and with reference to the accompanying drawings. It is understood that the disclosed and described examples, arrangements, configurations, components, elements, apparatus, methods, materials, etc. may be modified and may be required for specific applications. The identification of any specific technique, arrangement, method, etc. within the present disclosure is associated with a particular example provided or is merely a general description of such a technique, arrangement, method, etc. Unless otherwise specified, the identification of specific details or examples is not intended to be, and should not be construed as, mandatory or limiting. Selected examples of hair cutting systems, apparatus, and methods using suction generated by a vacuum are described below by way of example. Figure 1-28 The invention is disclosed and described in detail with reference to the present invention.

[0039] In general, the systems, apparatuses, and methods described and disclosed herein relate to human haircutting. Haircutting may include activities such as drying wet hair; styling wet or dry hair, such as smoothing, straightening, curling, waving, etc.; washing wet or dry hair; or a combination thereof. Embodiments of the disclosed systems, apparatuses, and methods may cause ambient or heated air to flow over the hair to comb the hair. In particular, the disclosed embodiments may generate a vacuum to assist the ambient or heated air to flow over the hair to comb the hair. The direction of the ambient or heated air flow may be controlled by the disclosed systems, apparatuses, and methods. For example, the airflow may be along the length of the hair from the root of the hair to the free end of the hair. Additionally, the shape and arrangement of the surface contacting the hair during haircutting may affect the shape of the combed hair. Thus, the disclosed systems, apparatuses, and methods may utilize suction generated by a vacuum in combination with heat and a shaped contact surface to cut hair.

[0040] In one embodiment, the system creates a vacuum that sucks or pulls the hair into a vacuum chamber. The airflow caused by the vacuum causes air to flow over the hair in a direction from the root of the hair to the free end of the hair, which can remove excess moisture from the hair. Optionally, hot or warm air can be introduced into the vacuum chamber to assist in the drying process. The vacuum suction effect forces the air along the length of the hair, encouraging the cells of the hair cuticle to lay flat in their natural arrangement, thereby forming healthy, smooth-looking hair. In addition, in order to preserve and increase the moisture content of the hair cortex, these methods can end with ambient (i.e., unheated) air being located over the hair.

[0041] In some embodiments, a portion of the system or apparatus may include components for moving and heating air useful for hair cutting. For example, an integrated fan may move air through or across a heating element and move air into or around a vacuum chamber or an opening of a vacuum chamber. This heated air may interact with the hair to aid in drying, styling, or otherwise hair cutting. Alternatively, the walls of the vacuum chamber may use conduction heating, which may warm and dry the hair. The vacuum chamber may be adjusted to a plurality of shapes to achieve different effects on the hair. In one example, to control the speed at which air flows through the vacuum chamber, the cross-sectional area of ​​the vacuum chamber may be increased or decreased. These increases or decreases in cross-sectional area may be performed within a single vacuum chamber, such that the speed at which air flows through the vacuum chamber may vary over the length of the vacuum chamber. In other examples, the shape of the vacuum chamber may affect the shape of the hair being combed. A straight vacuum chamber may be used to achieve a final straight hair. A slight or gradual bend or multiple such bends within the vacuum chamber may be used to achieve a final wavy hair. A sharp bend or multiple sharp bends within the vacuum chamber may be used to achieve a final curly hair.

[0042] In addition to hair drying and styling, the disclosed systems, apparatus, and methods can be further used to clean the hair. In one example, the suction applied to dry the hair vacuums away dust and dirt that accumulates in the hair or between shampoo on the hair. In addition, the systems, apparatus, and methods can be used with existing dry cleaning products to "dry clean" the hair. Dry shampoo, which has become increasingly popular in recent years, has become a way to reduce shampoo and dryness by absorbing excess oil produced by the sebaceous glands on the scalp and deposited on each strand of hair. Dry shampoo, which is usually sprayed as a powder, is generally used to brush it off from the hair. However, the systems, apparatus, and methods disclosed herein can more effectively vacuum away the dry shampoo from the scalp and clean the hair along the length of each strand of hair at the same time.

[0043] Figure 1 and 2 An exemplary embodiment of a hair cutting system 10 is shown. The system 10 includes a vacuum canister 12, a handheld device 14, and a hose 16 connecting the vacuum canister 12 to the handheld device 14. As described in detail below, the vacuum canister 12 is used to generate a vacuum, the handheld device 14 is used to engage and interact with the hair to comb the hair, and the hose 16 is used to form a fluid path, such as ambient or heated air, to flow between the handheld device 14 and the vacuum canister 12. The hose 16 can be a flexible, lightweight hose, and the length of the hose 16 is selected to accommodate a user of the system 10 moving the handheld device to comb the user's hair or the hair of another person.

[0044] The vacuum canister 12 may include an outer cover 18 and a coupler 20 for engaging and securing the end of a hose 16 connected to the vacuum canister 12. A vacuum device located within the outer cover 18 generates the desired vacuum suction to cause air to flow through the handheld device 14 and the hose 16 toward the vacuum canister 12. In one embodiment, the vacuum device may be a positive displacement pump. For example, the vacuum device may use a rotary vane pump or a piston driven pump that can generate a vacuum. In another embodiment, the vacuum device may be a suction type pump, such as a Venturi vacuum pump. Figure 2 As shown, a coupler 22 may be included, positioned around one end of the hose 16, for engaging and fixing the end of the hose 16 connected to the handheld device 14. A power cord (not shown) may be included that is laid from the vacuum tank 12 to the handheld device 14 to provide power to multiple devices in the handheld device 14. The power cord can be integrated into the hose and hidden. When the power cord is integrated into the hose, the end of the hose can be partially used as an electrical connector that fits tightly with a compatible electrical connector located in or on the handheld device and the vacuum tank. That is, when the hose is connected to the handheld device and the vacuum tank and the corresponding electrical connector adapter, power can be run from the vacuum tank to the handheld device through the power cord, and vice versa. To enhance safety, a momentary switch can be integrated into the electrical connector so that there is no power transmission unless the hose is properly connected to the handheld device and the vacuum tank. The proper engagement of the hose with the handheld device and the vacuum tank can inhibit the momentary switch and allow power to be transmitted.

[0045] Figure 3-6 Shown in detail Figure 1 and 2 An exemplary handheld device 14 is shown with hair cutting system 10 . Figure 3 and 4 is a perspective view of the handheld device 14, Figure 5 is a front view, Figure 6 is along Figure 5 The handheld device 14 includes a housing 24, a handle 26, and a hose connector 28. The housing 24 can be used to form the outer contour of the handheld device 14, but also to form one or more internal cavities within the handheld device further described herein. The housing 24 can be shaped or manufactured as a single component. Alternatively, the housing 24 can be composed of two or more components to assemble the housing 24.

[0046] The handle 26 can be arranged so that a user of the system 10 can grasp the handle 26 and manipulate the handheld device 14 to assist in cutting hair. The hose connector 28 is used to engage and secure one end of the hose 16 connected to the handheld device 14. Generally, the hose 16 is slid over the hose connector 28 to secure the hose 16 connected to the handheld device 14. Figure 4As shown, the hose connector 28 may include one or more features 30, such as ridges or barbs that can engage the hose 16 once the hose 16 is slid over the hose connector 28. It can be understood that the hose connector 28 and the coupler 22 can cooperate to securely connect the hose 16 to the handheld device 14. The handle 26 and the hose connector 28 can be integrated into the design of the cover 24 so that all three components are molded or manufactured together. Alternatively, the handle 26 and / or the hose connector 28 can be molded or manufactured separately and then assembled with the cover 24.

[0047] The handheld device 14 may further include a power switch 32. The power switch 32 may work in conjunction with the power cord to selectively provide power to devices and / or subsystems incorporated into the handheld device 14. The power switch 32 may be conveniently located on the handheld device 14 to assist a user of the system 10 in turning the system 10 on and off. It will be appreciated that while the power switch 32 is shown as being located on the handheld device 14, the power switch may be located elsewhere on the system 10, such as on the vacuum canister 12. Furthermore, while a single power switch is shown, it will be appreciated that the hair cutting system may include two or more power switches to assist in turning on and off various functions and subsystems of the hair cutting system.

[0048] Figure 6 The internal configuration of an exemplary handheld device 14 is shown. The handheld device 14 may include a vacuum cavity 34 and a heated air cavity 36. The heated air cavity 36 may be used to partially surround the vacuum cavity 34. The shape of the vacuum cavity 34 is shown to be generally circular in cross-section. As will be discussed further below, the shape of the vacuum cavity cross-section may vary from one embodiment to another.

[0049] The vacuum chamber 34 includes a hair receiving hole 38 and an outlet hole 40. The vacuum chamber 34 is in fluid communication with the vacuum tank 12 via the hose 16. It can be understood that once the vacuum device is activated, suction from the vacuum tank 12 enters the vacuum chamber 34 through the hose 16. Such suction will cause the surrounding air to enter the hair receiving hole 38, pass through the vacuum chamber 34, pass through the outlet hole 40, pass through the hose 16, and enter the vacuum tank 12. That is, when the vacuum device is activated, the air will flow along the vacuum chamber 34. Figure 6 Flow lines 42 are shown in a direction from hair receiving aperture 38 through vacuum chamber 34 to exit aperture 40. A mesh screen or other such filter may optionally be located at exit aperture 40 to capture strands of hair and other material that enters vacuum chamber 34. As will be described in greater detail herein, a user of system 10 may insert a portion of hair into hair receiving aperture 38, and the portion of hair may move downwardly into vacuum chamber 34 due to the suction created by the vacuum.

[0050] Located within the heated air cavity 36 of the handheld device 14 are a heating element 44 and a fan 46. Located adjacent the fan 46 is an air intake portion 48, which includes a plurality of openings (e.g., Figure 4 As shown), to provide contact between the fan 46 and the surrounding air. Figure 4 As shown, the plurality of openings in the air intake portion 48 may be generally slot-shaped. It is understood that such an arrangement may act as a screen to allow ambient air to enter the heated air cavity 36 while capturing or preventing debris from entering the heated air cavity 36. A screen or other similar component may be located in the air intake portion 48 to further capture debris such as dust or other such particles. A plurality of vents 50 are located between the heated air cavity 36 and the vacuum cavity 34 so that the heated air cavity 36 and the vacuum cavity 34 are in fluid communication through the plurality of vents 50.

[0051] The fan 46 may be configured such that when the fan 46 is activated, the fan 46 causes ambient air to pass through the plurality of openings of the air intake portion 48, through the fan 46, and into the heated air chamber 36 over the heating element 44, where the ambient air is heated by the heating element 44. The heated air may be gathered in the portion in front of the heated air chamber 36. Since the fan 46 generates a positive force within the heated air chamber 36 and a suction force within the vacuum chamber 34, the heated air flows from the heated air chamber 36 through the vent 50 to the vacuum chamber 34. Figure 6 Stream lines 52 in FIG. 5 show the airflow through the heating air cavity 36 .

[0052] The vacuum chamber 34 is flared outwardly near the hair receiving aperture 38 so that a heated air pocket 54 is formed along the circumference of the vacuum chamber 34 and near the hair receiving aperture 28. The aperture of the vacuum chamber 34 is generally round and smooth, and its diameter is approximately the same as the inner diameter of the hose 16 connecting the handheld device 14 to the vacuum canister 12. The heated air pocket 54 acts as a pressure relief pocket to allow heated air to enter the vacuum chamber 34, move along the circumference of the vacuum chamber 34 near the hair receiving aperture 38, and thereby efficiently and effectively interact and mix with the hair within the vacuum chamber 34. Such a configuration can also direct the heated air to move in a direction consistent with the airflow caused by the vacuum device, i.e., along the longitudinal length of the vacuum chamber 34. Such an arrangement can further avoid direct contact between the user's scalp and the heated air, and because the heated air is directed along the length of the hair, the airflow will not pinch the hair that is collected in the vacuum chamber 84.

[0053] The handheld device 14 can be used to selectively provide power to the heating element 44 and the fan 46 to activate the fan 46 and increase the temperature of the heating element 44. When the fan 46 is activated, ambient air moves into the heated air cavity 36, passes through the heating element 44, and transfers heat to the air through the heating element 44. It is understood that the power provided to the heating element 44 and the speed of the fan 46 can be adjusted to control the temperature of the air leaving the heated air cavity 36 and entering the vacuum cavity 34. The power provided to the heating element 44 and the speed of the fan 46 can be controlled by one or more user switches or dials located on the handheld device, the vacuum canister, or elsewhere on the hair cutting system.

[0054] Described below is an exemplary method of using the disclosed system and apparatus. A user may hold the handheld device 14 by the handle 26 and use the power switch 32 to turn on the vacuum device to dry hair. The user may collect a portion of wet hair and, starting with the free end of the portion of wet hair, insert the portion of wet hair into the hair receiving hole 38. The user may continue to insert the portion of wet hair until the entire length of the portion is within the vacuum chamber 34. In one example, once the handheld device 14 is in contact with the user's head or scalp, the entire length of the portion of wet hair is within the vacuum chamber 34. Due to the suction force, the airflow into and through the vacuum chamber 34 may help the user to move the portion of wet hair into the vacuum chamber 34.

[0055] Once the excess moisture has been removed from the portion of hair, which can occur in just a few seconds, the user can move the handheld device 14 a short distance away from the user's scalp and activate the heating element 44 and fan 46. The heating element 44 and fan 46 can be activated by switches or dials located on the handheld device 14 or the vacuum device 12. It should be understood that once the heating element 44 and fan 46 are activated, the fan 46 draws air through the air intake portion 48 and through the heating element 44 to heat the air. Once heated, the air moves through the vent 50 and flows along the hair within the vacuum chamber 34. The heated air is directed through the vacuum chamber 34 by the suction created by the vacuum device. The user can optionally move the handheld device 14 further and therewith closer to the scalp to assist in drying the entire length of longer hair. During the drying process, the airflow through the vacuum chamber 34 is away from the scalp and moves along the length of the hair toward the free end of the hair.

[0056] When the portion of hair reaches the desired level of dryness or styling, the user can turn off the fan 46 and the heating element 44 and allow ambient, unheated air to flow along the portion of hair, which can close the cuticle of each strand of hair. This closure of the cuticle can be achieved in just a few seconds. The handheld device 14 can optionally be arranged so that the heat-activated switch can be a momentary push button switch, a start / stop switch, or any switch or input that turns the heating function on or off as desired by the user. The user can repeat this process described herein for the rest of the hair until the user's hair is substantially dry. Figure 1-6 The vacuum chamber of the illustrated embodiment is shaped to allow the hair to be dry, smooth and generally straight. It will be appreciated that in order to achieve wavy hair, the vacuum chamber may be manufactured to include one or more gradual bends such that when wet hair engages the gradual bends, the hair will assume a curved shape as it dries. It will be further appreciated that in order to achieve curly hair, the vacuum chamber may be manufactured to include one or more sharp bends such that when wet hair engages the tight bends, the hair will assume a curly shape as it dries.

[0057] The system includes one or more vacuum pressure relief devices. If the pressure is too high, the vacuum pressure relief device will reduce or decrease the vacuum pressure in the vacuum chamber in response. When the hair receiving hole is blocked by hair or contacts the user's scalp, the pressure in the vacuum chamber may be unintentionally increased. In such a case, the vacuum pressure relief device can allow ambient air to enter the flow line from other access points so that the pressure on the user's hair or scalp is not too high. The vacuum pressure relief device can be a valve that opens when it senses a certain amount of suction. The vacuum pressure relief device can be located in the handheld device, the hose, or the vacuum tank. Essentially, it can be located anywhere on the system that can be in fluid communication with the flow line. In one example, the air intake hole can function as the vacuum pressure relief device. For example, embodiments have slots that help the fan draw air into the heated air chamber, and these slots can function as the vacuum pressure relief device. The vacuum pressure relief device can be adjusted so that the user can control the effective opening of the vacuum pressure relief device and therefore control the allowable pressure in the flow line. In addition, protrusions or "bumps" can be incorporated into or near the hair receiving hole so that the handheld device cannot be placed flush with the user's scalp because the protrusions can allow air to flow through the gap.

[0058] The outer cover of the handheld device 14 can be used to form a vacuum cavity and / or a heated air cavity. In another example, the vacuum cavity and the heated air cavity can be formed into separate components that can be assembled into the handheld device. In another example, the vacuum cavity and the heated air cavity can be integrated into a component that is then assembled into the handheld device.

[0059] In other embodiments, the handheld device may be arranged without a fan or heating element. Combing the hair is accomplished using unheated air that is moved along the hair by the suction created by the vacuum device. In another embodiment, the handheld device may be designed without a fan but include a heating element. The suction created by the vacuum device pulls the ambient air through the heating element to heat the air before it flows along the length of the hair. Additional features may be incorporated into the handheld device to assist in haircutting. For example, the vacuum chamber may include a plurality of features for controlling airflow through the vacuum chamber to reduce or eliminate tangling or flying of hair within the vacuum chamber. Figure 7-13 These features are shown.

[0060] Figure 7 and 8 The use of a vane within a vacuum chamber is shown. Figure 7 is a front view of the handheld device 60, and Figure 8 Is a handheld device 60 along Figure 7 A cross-sectional view taken along the midline BB. Similar to the previous description, the handheld device 60 includes a housing 62, a vacuum chamber 64 and a heated air chamber 66 surrounding the vacuum chamber 64, a handle 68 and a hose connector 70. A hair receiving hole 72 is formed at one end of the housing 62. A fan 74 and a heating element 76 are located in the heated air chamber 66. A power switch 78 located on the outside of the housing 62 can turn the vacuum device on or off, turn the heating element 76 and the fan 74 on or off, or control the vacuum device, the heating element and the fan.

[0061] The handheld device 60 further includes a plurality of vents 80 located between the heated air chamber 66 and the vacuum chamber 64 so that when the fan 74 is activated, ambient air can flow through the heating element 76 and the vents 80. In addition, the vacuum chamber 64 is flared outwardly near the hair receiving aperture 72 so that a heated air pocket 82 is formed along the circumference of the vacuum chamber 64 and near the hair receiving aperture 72. The aperture of the vacuum chamber 64 is generally circular and smooth and includes a plurality of vanes 84 extending outwardly from the wall of the vacuum chamber 64, toward the center of the vacuum chamber 64, and along the length of the vacuum chamber 64. The vanes 84 form a channel along which air can flow. Such a channel provides control over the flow of air through the vacuum chamber 64. The vanes 84 and the formed channel can result in a reduction or elimination of turbulence and generally promote laminar flow through the vacuum chamber 64. When hair is exposed to turbulent airflow, the hair can be blown around rapidly due to entanglement and other physical interactions, which can cause damage to the hair, especially to the ends of the hair. Although this embodiment shows six vanes 84, it will be appreciated that the vacuum chamber may be configured with more or less than six vanes, and the vanes may be configured in a variety of shapes.

[0062] Fig. 9 and 10The use of asymmetric cross-sectional areas and different cross-sectional areas of the vacuum chamber is shown. Fig. 9 is a front view of the handheld device 90, and Fig.10 Is a handheld device 90 along Fig. 9 The handheld device 90 includes many of the features discussed above. However, the shape of the vacuum chamber 92 includes a first portion 94 that is generally circular in cross section and a second portion 96 that is generally "half-moon" in cross section. Fig.10 As shown, the cross-section of the portion of the vacuum chamber 92 proximate the hair receiving aperture 98 is half-moon shaped and transitions to a circular cross-section as it extends outward from the hair receiving aperture 98. Such an irregular shape can produce a more uniform airflow across the width of the vacuum chamber 92. Under certain conditions, a uniform cross-section, such as a circle, produces a flow velocity gradient across the vacuum chamber. The flow velocity is lowest along the walls of the circular vacuum chamber and the flow velocity is greatest at the longitudinal center of the vacuum chamber. Producing a vacuum chamber with an irregular shape, such as a half-moon shaped portion or including the vanes discussed previously, can affect the flow velocity gradient to make the airflow more uniform across the cross-section of the vacuum chamber. It is understood that in addition to the irregular shapes such as the half-moon shaped cross-section and the addition of vanes shown herein, other irregular shapes can be incorporated into the vacuum chamber as a feature of the systems and apparatus disclosed herein.

[0063] Fig. 9 and Fig.10 The vacuum cavity 92 also has different cross-sectional areas along the vacuum cavity. The cross-sectional area of ​​the first portion 94 is larger than the cross-sectional area of ​​the second portion 96. It can be understood that when the air flows from the smaller cross-sectional area of ​​the second portion 96 to the larger cross-sectional area of ​​the first portion 94, the speed of the air flowing through the vacuum cavity will be slower. When the hair ends extend into the first portion 94, the lower speed can reduce the entanglement of the hair and the hair fluttering from side to side.

[0064] Fig.11 and 12 Different configurations of vents for directing heated air from the heating chamber to the vacuum chamber are shown. Fig.11 is a front view of the handheld device 100, and Fig.12 is a handheld device 100 along Fig.11 The handheld device 100 includes many of the features discussed above. However, the location of the plurality of vents 102 and the configuration of the heated air pocket 104 are different from the previously disclosed embodiments. The plurality of vents 102 direct the heated air toward the center of the vacuum chamber 106 and onto the hair within the vacuum chamber 106. The heated air flows through the heated air chamber 108, through the plurality of vents 102, and into the vacuum chamber 106 along a flow line 110. Fig.12As shown, there are two rows of vents 102. The direction of flow out of the vents 102 causes the heated air to generally gather over the entire cross-sectional area of ​​the vacuum chamber 106 and near the hair receiving holes 112. Thus, a heated air pocket 104 is created over the entire cross-sectional area of ​​the vacuum chamber 106 and near the hair receiving holes 112, providing heated air to mix with the hair. The holes of the vacuum chamber 66 are generally round and smooth. In addition, the direction of the heated air leaving the vents 102 is directed toward the center of the vacuum chamber 106, which can limit or eliminate the situation where hair is pinched near the hair receiving holes 112.

[0065] Fig.13 1 is a cross-sectional view of an exemplary vacuum chamber 120, whose cross-sectional area varies throughout the length of the vacuum chamber 120. The vacuum chamber 120 includes a first portion 112 having a first diameter, a second portion 124 having a second diameter, the second diameter being larger than the first diameter, and a transition portion 186 transitioning from the first diameter to the second diameter. The transition from the smaller first diameter to the larger second diameter reduces the air velocity as the air moves through the vacuum chamber 120. The reduction in air velocity can reduce the amount of side-to-side movement of the hair, which can reduce entanglement and damage to the combed hair within the vacuum chamber 120, especially to the ends of the individual strands of hair. In one example, the diameter of the second portion 124 is twice that of the first portion 122. This increase in diameter will cause the air velocity to be reduced by four times. The reduced velocity will cause the individual strands of hair to move less side-to-side, thereby causing less damage to the individual strands of hair.

[0066] Figure 14-17 Another exemplary vacuum chamber 130 is shown. Fig.14 is a side view of the vacuum chamber 130, Fig.15 is along Fig.14 The cross-sectional view taken along the center line EE, Fig.16 is along Fig.14 A cross-sectional view taken along the center line FF, and Fig.17 1 is a front view of the vacuum chamber 130. The vacuum chamber 130 includes three sections: a first section 132 having a first diameter; a second section 134 having a second diameter, which is larger than the first diameter; and a third section 136 having a third diameter, which is smaller than both the first and second diameters. The sections transition gradually. When air flows through the vacuum chamber 130, the flow rate will slow down when the air enters the second section 134, and the flow rate will increase when the air enters the third section 136. Fig.16 As shown, a series of vents 138 provide access to the heated air chamber or other such adjacent chambers to the vacuum chamber 130. The vents 138 direct the heated air downwardly through the vacuum chamber 130 along a path parallel to the centerline of the vacuum chamber.

[0067] Another way to control the flow of gas through the vacuum chamber is to place a flow conditioner in the flow line. The flow conditioner can be placed as an insert in the vacuum chamber, in the hose, in the vacuum tank, or anywhere else in the flow line. Figure 18-20 One embodiment of a flow conditioner 140 is shown. Fig. 20 As shown, the holes are generally circular and Fig.19 As shown, the diameter of the holes varies along the length of the flow conditioner 140. A first portion 142 of the flow conditioner initially has a relatively large diameter that gradually decreases until reaching approximately the middle point of the flow conditioner 140, transitioning to a relatively short second portion 144 of a fixed diameter. The flow conditioner 140 then transitions to a third portion 146 that initially has a relatively small diameter that gradually increases until the end of the flow conditioner 140.

[0068] Figure 21-23 Another embodiment of a flow conditioner 150 is shown. Fig.23 As shown, the holes are usually oval and Fig. 22 As shown, the diameter of the holes varies along the length of the flow conditioner 150. A first portion 152 of the flow conditioner initially has a relatively large diameter that gradually decreases until reaching approximately the midpoint of the flow conditioner 150, transitioning to a second portion 154 that initially has a relatively small diameter that gradually increases until reaching the end of the flow conditioner 150.

[0069] Fig.24 An exemplary flow regulator 150 is shown inserted into a handheld device 160. The flow regulator 150 is located within the outlet end of the vacuum chamber 162. The adjustment of the airflow can reduce the amount of flutter experienced by the hair within the vacuum chamber 162. Although the flow regulator 150 is shown as being located at the outlet end of the vacuum chamber 162, the flow regulator 150 can be located at the inlet end of the vacuum chamber 162 or anywhere else within the vacuum chamber. Further, the flow regulator 150 can be located within a hose attached to the handheld device 160 or anywhere else in the flow line. In addition, the flow regulator can be integrated or molded into a component of the system. For example, the flow regulator can be molded into an integral part of the vacuum chamber or an integral part of the hose.

[0070] Figure 25-27Another exemplary handheld device 170 is shown. The handheld device includes a housing 172 and a handle 174. The handheld device 170 may further include an electrical connector 176 and a power switch 178. A power cable (not shown) may be engaged with the electrical connector 178 to provide power to the handheld device 170. The power switch 178 may be conveniently placed on the handheld device 170 to assist a user of the handheld device 170 in turning certain functions on and off. Furthermore, while a single power switch is shown, it may be appreciated that two or more power switches may be included to assist in turning on and off various functions and subsystems of the hair cutting system.

[0071] The handheld device 170 further includes a vacuum chamber 180 and a heated air chamber 182. The vacuum chamber 180 is generally oval in cross-section as shown. The vacuum chamber 180 includes a hair receiving aperture 184 and an outlet aperture 186. Located within the heated air chamber 182 are a series of heating coils 188 and a fan 190. Located adjacent the fan 190 is an air intake aperture 192 that forms an opening in the housing 172 to provide the fan 190 with access to ambient air. Located adjacent the hair receiving aperture 184 are a plurality of vents 194. The plurality of vents 194 are located within the housing 172 and are distributed around the circumference of the hair receiving aperture 184.

[0072] The fan 190 causes ambient air to flow into the heated air chamber 182, past the heating coil 188, and through the vent 194. The vent 194 is configured so that when the air leaves the heated air chamber 182, the air is directed to the hair receiving hole 184, and the suction from the vacuum chamber 180 can draw the heated air in the vacuum chamber 180 to contact the hair located in the vacuum chamber 180.

[0073] Fig.28 Another embodiment of a handheld device 200 is shown. Figure 25-27 Similarly, the handheld device 200 includes a handle 202, a housing 204, a power switch 206, and a hair receiving hole 208. Fig.28 In an embodiment of the invention, the heated air chamber and heating element are located in front of the vacuum chamber, near the hair receiving hole 208, and do not surround the vacuum chamber as in other embodiments. In such an embodiment, air is heated and applied directly to the hair through a plurality of vents located on the inner wall of the heated air chamber. A fan can be located in the heated air chamber to move ambient air through the heating element and onto the hair in the vacuum chamber. Ambient air can be drawn into the handheld device through air intake holes 210. Optionally, a fan is not included. Ambient air is drawn to the handheld device by the suction created by the vacuum device. A similar drying effect can be achieved by directing heated air toward the user's hair as it is drawn into the vacuum chamber.

Claims

1. A hair cutting device comprising: Vacuum tank; a vacuum device located in the vacuum tank; A handheld device comprising a vacuum chamber in fluid communication with a vacuum device, the vacuum chamber comprising: A first opening, located at a first end of the vacuum chamber, has a first cross-sectional area and is configured to receive a portion of hair for insertion; A second opening, which is opposite to the first opening of the vacuum chamber and is located at a second end of the vacuum chamber; a wall extending from the first opening to the second opening and defining an inner bore; and an air pocket formed along a portion of the inner bore extending from a first location proximate the first opening and having a second cross-sectional area to a second location between the first location and the second opening and having a third cross-sectional area, wherein the second cross-sectional area is greater than the first cross-sectional area and the third cross-sectional area; and A hose is in fluid communication with the vacuum device and in fluid communication with the vacuum chamber of the handheld device.

2. The hair cutting device according to claim 1, The hose is located between the vacuum tank and the vacuum chamber.

3. The hair cutting apparatus of claim 1, wherein the cross-sectional area of ​​the cross section of the inner hole changes continuously from the first position to the second position.

4. A hair cutting apparatus according to claim 3, wherein the cross-section of the inner hole generally tapers from the first position to the second position.

5. The hair cutting device according to claim 1, further comprising: a heated air chamber in fluid communication with the vacuum chamber; Heating elements; as well as A fan is configured to blow air across the heating element and into the heated air cavity.

6. The hair cutting apparatus of claim 5, wherein the vacuum chamber, heated air chamber, heating element and fan are located in the handheld device.

7. The hair cutting apparatus of claim 6, wherein the vacuum chamber includes a plurality of holes located adjacent the first opening, the heated air chamber being in fluid communication with the vacuum chamber through the holes.

8. The hair cutting apparatus of claim 6, wherein the heated air cavity at least partially surrounds the vacuum cavity and is in fluid communication with the vacuum cavity to introduce heated air into the vacuum cavity.

9. The hair cutting apparatus of claim 8, wherein fluid communication between the heated air chamber and the vacuum chamber is provided by a plurality of holes in the wall adjacent the air pocket.

10. The hair cutting apparatus of claim 9, wherein the plurality of holes are positioned substantially evenly around the periphery of the wall.

11. The hair cutting apparatus of claim 8, wherein the heated air is introduced into the vacuum chamber at the air pocket.

12. The hair cutting apparatus of claim 11, wherein the vacuum chamber further comprises a front wall.

13. The hair cutting apparatus of claim 12, further comprising a plurality of holes in the front wall to introduce heated air into the vacuum chamber at the air pocket.

14. The hair cutting apparatus of claim 13, wherein the plurality of apertures are positioned substantially evenly around the front wall.

15. The hair cutting apparatus of claim 14, wherein the plurality of apertures direct the introduction of heated air into the vacuum chamber at the air pocket in a direction substantially parallel to the flow of vacuum air through the vacuum chamber.

16. The hair cutting apparatus of claim 5, wherein the plurality of blades extend inwardly from the wall to the inner bore of the vacuum chamber and further extend along the length of the wall of the vacuum chamber.

17. The hair cutting apparatus according to claim 16, wherein the plurality of blades are evenly arranged along the inner circumference of the vacuum chamber.

18. The hair cutting apparatus of claim 1, further comprising a flow conditioner.

19. A hair cutting device according to claim 18, wherein: The flow conditioner is a separate component that is inserted into the vacuum chamber.

20. The hair cutting apparatus of claim 18, wherein: The flow regulator is integrally formed in the vacuum chamber.

21. A hair cutting device comprising: Vacuum device; A vacuum chamber, the vacuum chamber being in fluid communication with the vacuum device, the vacuum chamber comprising: A first opening configured to receive a portion of hair for insertion; a second opening opposite the first opening; and A flow regulator associated with the vacuum chamber, the flow regulator having a variable cross-section, wherein the flow regulator includes a first portion and a second portion, the first portion having a cross-sectional area that decreases from a first end of the flow regulator to a middle of the flow regulator, and the second portion having a cross-sectional area that increases from the middle of the flow regulator to a second and opposite end of the flow regulator.

22. The hair cutting apparatus of claim 21, wherein the first end of the flow regulator is coupled to the second opening of the vacuum chamber.

23. The hair cutting apparatus of claim 21, wherein the flow regulator is a separate component at least partially inserted into the second opening of the vacuum chamber.

24. The hair cutting apparatus of claim 21, wherein the flow regulator is integrally formed in the vacuum chamber adjacent the second opening.

25. The hair cutting apparatus of claim 21, further comprising: a heated air chamber in fluid communication with the vacuum chamber; Heating elements; as well as A fan is configured to blow air across the heating element and into the heated air cavity.

26. The hair cutting apparatus of claim 25, wherein the vacuum chamber, the flow conditioner, the heated air chamber, the heating element and the fan are located in the handheld device.

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