Foot-operated door opener

Abstract

Foot-operated door openers operate without hand or power assistance. The entry cycle is initiated by pressing the pedal. This force rotates the pedal a quarter turn, engaging a flexible wheel and opening the door. The pedal is rigidly connected to a crank arm that engages a one-way crankshaft hub and rotates the wheel. Downward pressure from the pedal rotates a ratchet hinge connected to a bracket-spring wheel assembly, maintaining constant pressure on the ground. A gearbox or multiple pumps in the pedal rotate the wheel two or more times 360 degrees, opening the door and allowing the entrant to pass through until the foot pedal is released. This action releases the ratchet hinge mechanism, allowing the spring training wheel assembly to rotate back to its up position, releasing the wheel from the ground and allowing the door to close.

Description

Technical Field

[0001] The present invention relates to a safe foot-operated door opener for avoiding touching a door handle having non-hygienic pathogens with hands. Foot operation means using feet or using a cane. Further, the foot-operated door opener can also be applied to hands-free door opening in the case of warehouse workers, hood service staff carrying heavy food trays in and out, etc. The foot-operated door opener also acts as a door assist for people with weak arms.

Background Art

[0002] In the era of germs and viruses, door handles are a constant source of germs and viruses and are transmitted by hand to the next door opener.

[0003] Efforts have been made to provide electrically operable door openers, but many of them are complicated and expensive to install and operate, and require electricity, wiring, and sensors.

[0004] In a conventional patent document, U.S. Patent No. 10081977 of Shellray describes an automatically electronic and remotely controlled door opening / closing device using a remote control and a rearwardly rotatable wheel.

[0005] In other patents, a non-electric cradle for footwear such as shoes or boots attached to a door is provided so that an entrant has to forcibly insert shoes or boots, and as described in U.S. Patent No. 9115530 of Michael Sewell, in a non-powered footwear receptacle having a lower horizontal floorboard and a vertical shelf at the tip extending upward, an entrant tries to open the door only by the action of the shin of the leg. This is not practical because most doors are designed with standard overhead or floor closers and spring hinges and have a resistance value of 5 to 10 Lbs. Without the mechanical advantage of single-leg rotation, such force cannot be easily overcome.

[0006] The above-mentioned patent documents do not provide a simple and low-cost method for opening doors without using the entrant's hands, electric assist, or shoe rack, nor do they offer mechanical assistance.

[0007] The objective of the present invention is to provide a simple and low-cost door opening method that does not require the use of the visitor's hands or electrical assistance.

[0008] Furthermore, an objective of the present invention is to provide a convenient and safe door opener that allows visitors to operate the door opener's pedal actuator using only their feet.

[0009] Another object of the present invention is to provide a door opener that allows for safe passage through a door by introducing a time delay in both the opening and closing cycles of the door opening and closing process.

[0010] Another object of the present invention is to provide a foot-operated door opener that can be retrofitted to existing doors.

[0011] Further objects of the present invention will become apparent from the following description. [Overview of the Initiative] [Means for solving the problem]

[0012] This invention has been made in view of the above problems, and aims to provide a foot-operated door opener that does not require the use of hands or electrical assistance.

[0013] The foot-operated door opener of the present invention is commercially known as the Safety MAX™ Door Opener.

[0014] In this world overflowing with bacteria and viruses, this invention is This is a simple and low-cost door-opening mechanism that does not require manual or electrical assistance. The entrance cycle is initiated when the pedal is pressed down. This force causes the pedal to rotate a quarter turn, engaging with a flexible wheel and opening the door. The pedal is rigidly connected to a crank arm that engages with a unidirectional crank axle hub and rotates the wheel. The downward pressure from the pedal rotates a ratchet hinge connected to a bracket spring-loaded wheel assembly, maintaining constant pressure on the ground. The pedal's speed-increasing gearbox or multiple pumps rotate the wheel 360 degrees two or more times, opening the door enough for an entrant to pass through. When the entrant's foot is released from the foot pedal, it releases a unidirectional mechanical device such as a ratchet hinge mechanism, or other unidirectional mechanical devices such as a cam, coil, unidirectional screw device, slide way, or rack-pawl device. This allows the door to be closed with a standard overhead closer or spring-loaded hinge by rotating or sliding up the spring-loaded wheel assembly back to its original upper position and releasing the wheel from the ground. And the door awaits use by the next entrant.

[0015] The model features a retractable main spring for further assistance to accommodate selectable delayed operation 56.0, at which point a foot-switch actuated spring-loaded wheel drops and joins the door opening cycle. After operation, the door closes after a time delay by a retractable spring mechanism, as described above. Opening and closing is mechanically advantageous without the use of electricity or motors. Unlike all prior art, this invention is unique, novel, and distinguishable, as it is a simple machine that does not require electricity, any electric motors, scanners, or traffic readers. Its mechanical advantages and spring-loaded hinge assembly allow it to maintain constant pressure against the floor surface. The door is opened hygienically when it is desirable to avoid diseases, viruses, bacteria, and other hazards, or for hands-free operation when both hands are occupied, such as by warehouse staff or food service personnel. By using an economical device that can be added to and / or retrofitted to doors made of wood, hollow metal, metal-framed glass, solid glass, etc., it facilitates entrances and exits of all types, locations, and environments.

[0016] Other embodiment foot-operated door openers may include an internal latch release mechanism, and these door openers can be used on more standard latching doors in homes.

[0017] In a preferred first embodiment, the foot-operated door opener comprises a crank assembly having a crank arm that rotates from a home position to rotate a crankshaft 1.3 when a foot pedal is pressed with a foot or cane. The drive assembly is connected to the crank arm via a crankshaft for winding one or more main springs.

[0018] A gear train having a pre-selected speed ratio transmits power from the main spring to the drive wheel assembly, which preferably includes main drive wheels selected from a group consisting of mechanically soft durometer main drive wheels 5.1 and pneumatic main drive wheels connected to the main drive shaft 4.5. The main crankshaft acts on the traction tension assembly to rotate the main shaft 1.3 and swing the door.

[0019] Optionally, a delay assembly is provided that delays the release of the main spring's potential energy to the main drive shaft 1.3, allowing the entrant's weight to be ergonomically and safely transferred to their feet, and enabling the entrant to comfortably step back to one side to avoid door swinging.

[0020] The crank shaft and arm are fitted with a return spring to return the crank arm to its home position, allowing visitors to open the door without using their hands or electric assistance.

[0021] Safety features are included, thereby the door opener gear train includes a clutch bearing that allows the gear train to move in one direction without backlash or reversal.

[0022] The gear train's speed increase ratio is preferably about 1 to 10.

[0023] From a safety standpoint, the door opener delay assembly includes a spring-loaded mechanical dashpot or pneumatic cylinder that is compressed by the main crankshaft when the pedal and crank arm are pressed down, and an opening such as an orifice or variable needle valve is provided in the pneumatic cylinder to adjust the delay that allows air to escape from the compression chamber in the mechanical or pneumatic cylinder, thereby releasing the stored potential energy from the main spring and starting the rotational cycle of the main drive wheel 5.1 without losing potential energy. Furthermore, for the delay assembly, the pneumatic cylinder has a piston and a spring-loaded plunger, the plunger pressing a pawl that engages with a one-way mechanical device such as a ratchet wheel or socket directly connected to the main drive wheel. Other one-way devices such as cams, one-way screw devices, racks, and pawl devices can also be used. As a result, when the pressure inside the cylinder is released, the spring-loaded plunger releases the ratchet, the potential energy accumulated from the main spring due to the delay is released, and the rotation cycle of the main drive wheel begins without losing potential energy.

[0024] The traction assembly is also actuated when the crank arm is pushed down, rotating the main shaft described above, causing the push-down arm to pull down the fork assembly, engaging a spring-loaded mechanism pushed down by the locking claw, generating a constant downward pressure over a predetermined travel length, corresponding to the undercut below the door, the sill, and any incline in front of the door. When the actuation pin strikes the actuation trigger at the end of the rotation of the main spring described above, the spring-loaded mechanism releases the locking claw and raises it, returning the main drive wheel 5.1 to a stationary position ready for the next cycle.

[0025] The door then automatically closes with the assistance of at least one of the following: a standard spring-loaded or gravity hinge, a ceiling closing mechanism, or a floor closing mechanism, which are standardly fitted to all operating entrance doors, or these can be added to interior doors that are not normally fitted.

[0026] Optionally, the drive wheel assembly is connected to the crank arm via a set of steel cables wound around the drum, such that when the pedal and crank arm are depressed, the cables rotate the drum to wind up the main spring. Optionally, the main springs can be either left-handed or right-handed in all cases.

[0027] For stability, a chassis is attached to the door to house substantially all of the operating elements of the door opener.

[0028] In a preferred first embodiment, the present invention also provides a method of assembling and using a foot-operated door opener, a) providing a crank assembly having a crank arm that rotates from a home position upon depression of a foot pedal to rotate a crank shaft 1.3; b) providing a cable assembly connected to the crank arm via a transmission shaft to wind up one or more main springs, providing a drive assembly connected to the transmission shaft connected to the gear train, c) providing a gear train having a preselected gear ratio for transmitting power from the main spring to a drive wheel, the drive wheel comprising a flexible durometer main drive wheel 5.1 connected to a main drive shaft 4.5; d) alternatively, providing a crank assembly and a crank shaft that rotate a gear power train having a gear ratio of about 1 to 10 for winding up one or more springs, providing a main spring to the drive wheel assembly, the drive wheel assembly including a soft durometer main drive wheel 5.1 connected to a main drive shaft 4.5, a drive assembly; e) operating a traction tension assembly by the crank shaft to rotate the drive shaft 4.5 and swing the door, f) Provide a delay assembly that delays the release of the potential energy of the main spring to the main drive shaft in order to enable the weight of the entrant to be ergonomically and safely transferred to both of their feet, and to enable the entrant to comfortably move back to one side and eliminate the swinging of the door, g) A return spring is attached to the crankshaft and returns the crank arm to its home position, h) A step in which the visitor opens the door using the door opener without using their hands or electric assistance, i) Provide a carriage assembly that accommodates all related mechanisms and the relationships thereof, j) To facilitate the attachment of the opener to a new or existing door, a hole is provided in the carriage, k) A clamp subplate mounting system is provided that wraps around the bottom and edges of the door, facilitating the attachment of the opener to the door without penetrating, drilling, or damaging the existing glass, metal, wood, or fiberglass door. l) Provide an ergonomic cover to protect the door opener from weather, dirt, and the environment, m) The cover is provided to prevent pedestrians from getting caught in or falling over the door opener.

[0029] A method for opening a door without electric assistance using a foot-operated door opener optionally further includes the step of providing a gear train having a clutch bearing that allows unidirectional movement of the gear train, with or without backlash.

[0030] The speed increase ratio of the gear train is preferably about 1 to 10.

[0031] The method further comprises a delay assembly having a spring-loaded mechanical or pneumatic cylinder that is compressed by the main crankshaft when the pedal and crank arm are pushed down, and an opening such as a fixed orifice or a variable needle valve is provided in the mechanical or pneumatic cylinder to adjust the delay that releases stored potential energy from the main spring by allowing air to escape from the compression chamber in the pneumatic cylinder or dashpot, thereby initiating the rotational cycle of the main drive wheel 5.1 without loss of potential energy.

[0032] Alternatively, the method optionally further includes a friction clutch or damper, such as a dashpot cylinder, that restrains the drive wheel for a fixed or variable time, and mechanically adjusts a spring-loaded plunger that presses a pawl that engages with a ratchet wheel directly connected to the main drive wheel, so that when the pressure in the cylinder is released, the spring-loaded plunger releases the ratchet, the delay releases the stored potential energy from the main spring, and the rotational cycle of the main drive wheel begins without loss of potential energy.

[0033] The method further comprises a mechanical or pneumatic cylinder including a piston and a spring-loaded plunger, the spring-loaded plunger pressing a pawl that engages with a ratchet wheel directly connected to the main drive wheel described above. When the pressure in the cylinder is released, the spring-loaded plunger releases the ratchet, the delay releases the stored potential energy from the main spring, and the rotational cycle of the main drive wheel begins without loss of potential energy.

[0034] Optionally, the method further comprises a machine or dashpot cylinder including a piston and a spring-loaded plunger, the spring-loaded plunger pressing a pawl that engages with a ratchet wheel directly connected to the main drive wheel described above. When the pressure in the cylinder is released, the spring-loaded plunger releases the ratchet, the delay releases the stored potential energy from the main spring, and the rotational cycle of the main drive wheel begins without loss of potential energy.

[0035] Optionally, the method further includes steps to accommodate an undercut below the door, a threshold, and any incline in front of the door, which are also actuated when the crank arm is pushed down, rotating the crank shaft described above, causing the push-down arm to pull down the fork arm, engaging with a spring-loaded mechanism pushed down by a locking claw, generating a constant downward pressure over a predetermined travel length.

[0036] The method of opening the door using a foot-operated door opener further includes, at the end of the rotation of the main spring, striking the actuation pin with the actuation trigger, releasing the locking claw that closed the spring-loaded mechanism, raising the main drive wheel 5.1 and returning it to a stationary position ready for the next cycle.

[0037] Optionally, the method includes a time delay of raising the main drive wheel 5.1 to its original position by a predetermined length or a variable amount of time before raising the main drive wheel 5.1 to a stationary position ready for the next cycle.

[0038] The method further includes connecting the drive wheel assembly to the gear train connected to the transmission shaft and crank arm via a set of steel cables wound around a drum, thereby causing the pedal and crank arm to be pressed down, the cables to rotate the drum and the transmission shaft, thereby winding up the main spring.

[0039] Optionally, the main springs may be left-handed or right-handed.

[0040] Furthermore, when the chassis is attached to the door, it houses almost all of the operating elements of the foot-operated door opener.

[0041] In the second embodiment, a foot-operated door opener is activated by the user applying force to a pedal mounted on a crank arm and shaft, and the transmission shaft is operated via a transmission arm and drive pawl, and is operated by a right-handed main spring as a drive assembly mounted via chassis mounting holes, screws and other fasteners and a fastening subplate. The gear train according to this second embodiment includes a main gear having a clutch bearing, an idler speed-increasing gear and an idler shaft, a secondary speed-increasing gear, a shaft, and a drive gear communicating with the drive wheel and driving the drive shaft associated with the transmission gear. The traction tension carriage assembly adjusts the adhesion, slipperiness or coefficient of friction on the surface on which various components, including a tension arm having a bracket arm, actuating arm, connecting arm, carriage pressing arm, hinge pin and tension arm roller, move. A traction spring is provided along the trigger actuator pin to ensure smooth opening and closing of the door with a delay by a friction slip clutch between the drive wheel and the drive shaft.

[0042] In the third embodiment, when a user presses a pedal in the entrance cycle, a non-electric foot-operated door opener having a drive drain, preferably a planetary gear assembly, is activated. This force on the pedal causes the crank arm to rotate 60 to 90 degrees, engaging the soft wheel and opening the door D. The speed-increasing planetary gearbox winds one or more left-handed and right-handed springs to open the door wide enough for an entrant to pass through until their foot is released from the foot pedal. The crank arm returns to its original position by the return arm spring. This causes the crank arm to strike the trigger lever, releasing the ratchet hinge mechanism and spring, and the wheel return spring, guided by the guide pin stop, raises the wheel assembly back to its original upper position. The wheel is released from the ground, allowing the door to be closed with a standard overhead closer or spring-loaded hinge, which is standard hardware for most doors. At this point, after the door has been opened and closed, the door awaits use by the next user. [Brief explanation of the drawing]

[0043] The present invention is best understood from the accompanying drawings. However, the present invention is not limited to the specific embodiments shown in the following drawings. [Figure 1] Figure 1 is a perspective view from the upper left front with the foot pedal facing downwards. [Figure 2] Figure 2 is a rear-right perspective view showing the door and floor removed, with the pedals facing upwards. [Figure 3] Figure 3 is a front-up, upper-right perspective view with the foot pedal positioned vertically. [Figure 4] Figure 4 is a rear-left perspective view showing the door and floor removed, with the foot pedal in the upward position. [Figure 4A] Figure 4A is a detailed cross-sectional view of the main drive wheel 5.1 of the delay system. [Figure 4B] Figure 4B is a detailed cross-sectional view of the towing carriage assembly. [Figure 4C] Figure 4C is a schematic block diagram of the pneumatic delay system. [Figure 4D] Figure 4D is a schematic block diagram of the dashpot delay system. [Figure 4E] Figure 4E is a schematic block diagram of the slip clutch delay system. [Figure 5A-5B-6] Figures 5A, 5B, and 6 are diagrams illustrating the environment in which a foot-operated door opener is used. Figure 5A shows a pedestrian approaching a door equipped with a foot-operated door opener, where the foot-operated door opener has a foot-contact pedal attached to a crank arm, and the internal components of the foot-operated door opener are enclosed in a housing. Figure 5B is a detailed enlarged view showing the pedestrian's foot approaching the pedal 1.1 attached to the crank arm 1.2 and the housing 12 attached to the ground G near the door D. Figure 6 is a detailed enlarged view of the Wallace instruction logo 13. [Figure 7] Figure 7 is an upper right front perspective view of the door opener according to the second embodiment, with the foot-operated pedal in the lowered position. [Figure 8] Figure 8 is an upper right front perspective view of the second embodiment with the pedal in the upper position. [Figure 9] Figure 9 is a left-upper front perspective view of the second embodiment of Figure 7, with the foot pedal facing downwards, and shows a delay-slip clutch assembly that allows time for the user to move away from the open door. [Figure 10] Figure 10 is a left-side perspective view of the foot-operated door opener according to the third embodiment, with the pedal in the upper position. [Figure 11] Figure 11 is a right-side perspective view of the foot-operated door opener according to the third embodiment, with the pedal in the upper position. [Figure 12] Figure 12 is an exploded detail view of the planetary gear according to the third embodiment. [Modes for carrying out the invention]

[0044] The present invention has been widely applied to various articles in many technical fields. For the sake of explanation, the best mode for carrying out the present invention will be described as a configuration in which a foot-operated door opener without electric assistance is provided.

[0045] In the first embodiment shown in Figures 1 to 6, the foot-operated door opener of the present invention is equipped with a pedal for the user's convenience. It minimizes contact with the unhygienic manual door handle and enables hands-free door operation when passing through a door while keeping one's hands occupied.

[0046] The door opener of the first embodiment is divided into seven different operating segments. The first segment is the crank assembly 1.0. This cycle is initiated when the pedal 1.1 is pressed down, moving the crank arm 1.2 and transmitting torque to the crank shaft 1.3. The crank arm returns to the home position by the return spring 1.33.

[0047] The next segment is the drive assembly 2.0. The drive assembly is connected to the crank arm by a pair of steel cables 2.2. The cables are wound around a drum 2.3, and when the pedal and crank arm are pushed down, the cables rotate the drum and wind up the main springs 2.6 and 2.7. In the current configuration, both the left and right springs are springed up on the main shaft 2.5, generating the torque necessary to rotate the wheel 5.1 via the gear train 4.0.

[0048] Chassis 3.1 accommodates all different mechanisms and bushings within the chassis. It also supports methods of securing the chassis to the door using fasteners such as screws and clamps.

[0049] The gear train 4.0 has a gear ratio of 1 to 10. When the crank arm 1.2 rotates 60 degrees, the 4-inch wheel 5.1 rotates 4.5 degrees. This is sufficient to open the door 25 by 30 inches. Main springs 2.6 and 2.7 drive the primary gear 4.1, which has a one-way clutch bearing 4.11, around shaft 2.5. This allows the gear to move in one direction without backlash or recoil. The large main gear meshes with a small idler gear 4.2 connected to gear 4.3 via axle 4.31. Gear 4.3 meshes with the drive gear 4.4. The drive gear 4.4 is mounted on the same shaft 4.5 as the drive wheel 5.1. The drivetrain transmits the rotation of the transmission shaft 2.5 to the drive shaft 4.5 in the same direction of rotation at a ratio of 1 to 10.

[0050] The drive wheel assembly 5.0 consists of drive wheels, such as soft durometer wheels or pneumatic main drive wheels, connected to the main drive shaft 4.5 via hubs 5.2. The energy stored in the wound torsion springs 2.6, 2.7 is transmitted to the drive wheels 5.1 via the gear train. By temporarily locking the drive wheels 5.1 with a delay system, a safe time delay, for example about 3-5 seconds, can be allowed before the wheels 5.1 begin to rotate.

[0051] The delay system 6.0 holds and delays the release of the energy from the wound-up springs 2.6 and 2.7. This allows weight to be safely transferred to both feet. This unique feature allows weight to return to the ground. This allows entrants to comfortably step back to one side and avoid the swinging door.

[0052] The delay assembly 6.0 comprises a double-acting pneumatic cylinder 6.2 with a spring return. The cylinder 6.2 is compressed by the main crankshaft 1.3 when the pedal 1.1 and crank arm 1.2 are pressed down. The cylinder 6.2 pressurizes a single-acting pin cylinder 6.3 via a plastic tube 6.24 and a check valve 6.251, causing a plunger 6.32 to extend. This plunger presses a pawl 6.4 that engages with and locks onto a ratchet wheel 6.5 directly connected to the main drive wheel 5.1. Air escapes from the compression chamber of the single-acting pin cylinder 6.2 through a fixed orifice throttling 6.252 or a needle valve, controlling the delay. When the pressure is released from the orifice, the spring-loaded plunger 6.32 retracts via a tension spring 6.6, releasing the pawl 6.4, which in turn releases the ratchet 6.5 onto the main wheel 5.1. This delay allows the stored energy of the wound-up torsional spring to be released without loss, and the rotation of the drive wheel 5.1 is released.

[0053] The traction tension assembly 7.0 is activated when the main pedal crank arm 1.2 is pressed down. This causes the crankshaft 1.3 connected to the operating arm 7.2 to rotate, and the carriage pressing arm 7.3 is pressed down via the connecting link 7.21. The tension arm 7.4 is pressed down by the pressing arm 7.3 via the tension arm roller 7.41, falls into a notch, and engages with the traction locking claw 7.5 by the traction claw spring 7.51, maintaining a continuous light torque to cause the traction locking claw to contact the rounded portion of the tension arm 7.4. The pressing arm 7.3 presses down and engages the preload fork assembly 7.1 via the guide pin stop 7.12, moving the drive wheel 5.1 toward the ground. The traction spring 7.6 maintains a constant downward pressure, generating a positive force toward the ground to maintain traction over 1 / 2 inch of travel 7.11. This is to accommodate undercuts, thresholds, and arbitrary inclines at the bottom of the door during the door opening process.

[0054] When the main springs 2.6 and 2.7 are released at the end of the cycle, the operating pin 7.8 contacts the trigger lever 7.7, lifting the locking pawl 7.5 via the pawl operating shaft 7.52, and releasing the fork assembly with the assistance of the fork assembly lifting spring 7.13. This lifts the main drive wheel 5.1 and returns it to the stationary position where the next cycle begins.

[0055] Figures 4A and 4B show detailed cross-sections of the mechanism that are difficult to see in isometric views. Figures 4C, 4D, and 4E are diagrams of the selectable systems.

[0056] Figure 4A is a detailed cross-sectional view of the wheel delay assembly. For example, as described above, the delay assembly 6.0 includes a double-acting pneumatic cylinder 6.2 with a spring return. The cylinder 6.2 is compressed by the main crankshaft 1.3 when the pedal 1.1 and crank arm 1.2 are pressed down. The cylinder 6.2 pressurizes a single-acting pin cylinder 6.3 via a plastic tube 6.24 and a check valve 6.251, causing a plunger 6.32 to extend. This plunger presses a pawl 6.4 that engages with and locks onto a ratchet wheel 6.5 directly connected to the main drive wheel 5.1. Air escapes from the compression chamber of the single-acting pin cylinder 6.2 through a fixed orifice throttling 6.252 or a needle valve, controlling the delay. When the pressure is released from the orifice, the spring-loaded plunger 6.32 retracts via a tension spring 6.6, releasing the pawl 6.4, which in turn releases the ratchet 6.5 onto the main wheel 5.1. This delay allows the stored energy of the wound-up torsional spring to be released without loss, and the rotation of the drive wheel 5.1 is released.

[0057] Figure 4B is a detailed cross-sectional view of the traction tension carriage assembly. For example, as described above, when the main pedal crank arm 1.2 is pressed down, the traction tension mechanism 7.0 is activated. This causes the crankshaft 1.3 connected to the operating arm 7.2 to rotate, and the carriage pressing arm 7.3 is pressed down via the connecting link 7.21. The tension arm 7.4 is pressed down by the pressing arm 7.3 via the tension arm roller 7.41, falls into a notch, and is engaged with the traction locking claw 7.5 by the traction claw spring 7.51, maintaining a continuous light torque to cause the traction locking claw to contact the rounded portion of the tension arm 7.4. The pressing arm 7.3 presses down and engages the preloaded fork assembly 7.1 via the guide pin stop 7.12, moving the drive wheel 5.1 toward the ground. The traction spring 7.6 maintains a constant downward pressure, generating a positive force toward the ground to maintain traction over 1 / 2 inch of travel 7.11. This is to accommodate undercuts, thresholds, and arbitrary inclines at the bottom of the door during the door opening process.

[0058] When the main springs 2.6 and 2.7 are released at the end of the cycle, the operating pin 7.8 contacts the trigger lever 7.7, lifting the locking pawl 7.5 via the pawl operating shaft 7.52, and releasing the fork assembly with the assistance of the fork assembly lifting spring 7.13. This lifts the main drive wheel 5.1 and returns it to the stationary position where the next cycle begins.

[0059] Figure 4C is a diagram of a selectable pneumatic delay system. When the double-acting cylinder is actuated by the crankshaft 1.3, a check valve pressurizes the system. The valve stores pressure in the single-acting pin cylinder and engages the plunger. A second check valve is aligned with the primary cylinder and maintains the seal and pressure in the pin cylinder. An orifice throttle or needle valve relieves pressure at a controlled speed to delay the release of the drive wheel. A first check valve, aligned with the primary cylinder, releases pressure in the primary cylinder, increasing the backstroke so that the system can be charged the next time the pedal is pressed down.

[0060] This also functions as a delay in the engagement of the traction release mechanism 7.0, providing a delay option to hold the door open by delaying the closing cycle by a constant or variable time interval.

[0061] Figure 4D is a diagram of a selectable dashpot delay system. This mechanism may be used in conjunction with the pneumatic system shown in Figure 4C, or it may be a standalone system physically actuated by mechanical means. This spring-loaded dashpot cylinder can work in cooperation with a throttle or needle valve to control the release of the plunger by a time delay until the drive wheel engages.

[0062] This also functions as a delay in the engagement of the traction release mechanism 7.0, providing a delay option to hold the door open by delaying the closing cycle by a constant or variable time interval.

[0063] Figure 4E is a diagram of a selectable friction slip clutch delay system. A stator fixed to the axle disc engages with a rotating disc mounted on the drive wheel. These two discs can slip a predetermined number of times before mechanically engaging and locking. This time delay is adjusted by changing the tension applied to the load spring with a tension nut. This changes the duration of slip before the two surfaces mechanically engage.

[0064] This also functions as a delay in the engagement of the traction release mechanism, providing an option for delaying the timing of when the closed cycle begins.

[0065] Figures 5A, 5B, and 6 show details of the environment in which a foot-operated door opener is used.

[0066] For example, Figure 5A shows a pedestrian approaching a door D equipped with a foot-operated door opener 10 having a foot-operated pedal 1.1 attached to a crank arm 1.2, with the internal components of the foot-operated door opener 10 surrounded by the housing 12. Figure 5A also shows a wordless instruction logo 13 displayed on the surface of the door or any visible surface near the door. Preferably, the logo has three images: an image of a user's hand holding the door handle with a diagonal marking intersecting it; a magnified detail of the pedestrian's foot in contact with the pedal 1.1; and an image of the door opened in the direction of an arrow illustrated to draw attention to the swinging trajectory of the door.

[0067] Figure 5B is a detailed view showing a pedestrian's foot approaching the pedal 1.1 attached to the crank arm 1.2, and the housing 12 attached to the ground G near the door D.

[0068] Figure 6 is a detailed enlargement of the Wallace instruction logo 13.

[0069] In the above description, certain terms and visual descriptions are used to illustrate preferred embodiments of the present invention. However, the terms and illustrations shown should not be interpreted as being more restrictive than the terms shown in the prior art, and these terms and illustrations are illustrative only and are not intended to limit the scope of the present invention.

[0070] In the second embodiment, as shown in Figures 7-9, the current configuration of the door opener can be divided into seven sections. The first section is the crank assembly 31.0. This cycle begins when the pedal 31.1 is pressed down, moving the crank arm 31.2 downward and transmitting force to the crank shaft 31.3. The crank arm returns to the home position through the door-opening cycle with the assistance of the main spring 32.6 via the trigger actuator pin 37.8. The crank arm 31.2 is connected to the driver arm 32.7 via the connecting link 32.2.

[0071] The next section is the drive assembly 32.0. The drive assembly is connected to the main spring 32.6, and when the pedal and crank arm are pressed down, the main spring winds up, causing the main gear 34.1, which has a clutch bearing 34.11, to rotate around the shaft 32.5 via the transmission shaft 32.5. This allows the gear to move in one direction without backlash or retraction. The main gear is pressed down by the connecting link 32.2 and fixed in place by the drive pawl 32.3 so as not to wind up the main spring. The main spring 32.6 is wound up. The chassis 33.1 houses all the different mechanisms and bushings within the chassis. It also houses the means for securing this mechanism to the door with screws and clamps.

[0072] The gear train 34.0 has a speed increase ratio of 1 to 10. This means that when the crank arm 31.2 is rotated 60 to 90 degrees, the 0.4-inch wheel 35.1 rotates 1 / 2 to 3 turns. This is sufficient to open the door 25 by 30 inches. The main spring 32.6 drives the main gear 34.1 and meshes with the transmission gear 34.6. The large transmission gear goes up to the small idler gear 34.2, then again to the secondary speed increase gear 34.3, and finally to the drive gear 34.4. The drive gear is mounted on the same shaft 34.5 as the drive wheel 35.1.

[0073] The drive wheel assembly 35.0 consists of a soft durometer wheel connected to the main drive shaft 34.5, which is connected to the drive shaft. When the crank arm 31.2, which is connected to the pedal 31.1 and driver arm 32.7 via a connecting link 32.2, is pressed down, the spring 32.6 is wound up, generating potential energy in the spring 32.6. This potential energy is immediately held so as not to be released.

[0074] The delayed assembly 36.0 holds and delays the release of the potential energy of the wound-up spring. This allows the entrant to safely transfer their weight to both feet. This unique feature allows their weight to return to the ground. This allows the entrant to comfortably step back to one side and avoid the swinging door.

[0075] The delay assembly consists of a spring-loaded pneumatic cylinder (not shown). The cylinder is compressed by the main crankshaft when the pedal and crank arm are pressed down. The cylinder moves air through hoses and check valves to the piston and plunger of a single-acting pin cylinder. This plunger presses a pawl that engages with a ratchet wheel directly connected to the main drive wheel. By adjusting the needle valve, air is released from the compression chamber, and the delay is controlled. When this pressure is released, the plunger is disengaged by a tension spring, and the pawl on the main wheel side releases the ratchet.

[0076] Alternatively, the method involves using a spring-loaded dashpot, which is used in the LEU of a single-acting pin cylinder. This mechanically activates the cylinder, eliminating the need for a pneumatic cylinder, hoses, and check valves. This releases the stored potential energy from the main spring, initiating a wheel rotation cycle without loss of potential energy.

[0077] Alternatively, as shown in Figure 4E, this method involves providing a friction clutch plate 36.1 to restrain the drive wheel 35.1 and the main gear 34.1 for a certain period of time.

[0078] The traction tension assembly 37.0 regulates the adhesion, slipperiness, and coefficient of friction of the surfaces on which each component moves. This is activated when the main pedal crank arm 31.2 is pushed down. This causes the connecting arm 37.21 to rotate and descend, and the carriage pressing arm 37.3 to descend. The pushing arm engages the actuating arm 37.2, thereby acting on the bracket arm 37.1 and engaging the traction spring 37.6. This maintains a constant variable pressure on the bracket arm 37.1 and a constant pressure on the inclined floor.

[0079] When the drive pawl 32.3 rotates with the main gear 34.1, pedal 31.1, transmission arm 32.2, and connecting arm 37.21, it lifts the carriage pressing arm 37.3. This causes the pressing arm to lift the bracket arm 37.1 by engaging the actuating arm 37.2, which is engaged with the traction spring 37.6, raising the bracket arm 37.1 and retracting the wheel 35.1. This allows the door D to swing freely to the closed position via a spring-loaded hinge mounted on the floor. This allows the door to be closed without human assistance.

[0080] In the third embodiment shown in Figures 10 to 12, a non-electric foot-operated door opener is activated when a user presses pedal 51.1 on the entrance cycle. This force applied to pedal 51.1 causes a crank arm 51.2 to rotate 60 to 90 degrees, engaging a soft wheel 55.1 and opening the door D. Pedal 51.1 is rigidly connected to a crank arm 51.2 which is fitted into a one-way clutch bearing 54.11, connected to a planetary gearbox 54.1, and connected to a drive shaft hub 54.5, causing the soft wheel 55.1 to rotate. The downward pressure from pedal 51.1 rotates a bracket arm 57.1 in a spring-loaded wheel assembly having a hinge 57.31 connected to a traction lock ratchet 57.5 and the main chassis 53.1, maintaining a constant pressure on the ground G.

[0081] The speed-increasing planetary gearbox 54.1 operates as needed to wind up one or more springs 52.27, 52.26 (left-handed, right-handed) when the order is reversed from the crank arm to the gear, or when the pedal is pressed down multiple times, it rotates the wheel system 54.5 connected to the drive shaft 54.5, causing the wheel 51.1 to rotate 360 ​​degrees multiple times, thereby opening the door wide enough for the entrant to pass through until their foot is released from the foot pedal 51.1. The crank arm 51.2 returns to its original position by the return arm spring 51.33. This causes the crank arm 51.2 to contact the trigger lever 57.7, releasing the ratchet hinge mechanism and springs 57.5, 57.6. The wheel return spring 57.8 is guided by guide pin stops 57.11 and 57.12 to raise and rotate the wheel assembly upward, raising it to its original raised position and stopping, releasing the wheel 55.1 from the ground, thereby allowing the door to be closed with a standard overhead closer or spring-loaded hinge, which is standard hardware for most doors. At this point, after the door has been opened or closed, the door awaits use by the next user.

[0082] In the embodiments shown in Figures 10 to 12, a selectable main spring or left-handed and right-handed springs 52.27, 52.26 are provided, which are retractable for further assistance to accommodate a delayed action 56.0, at which point the foot-switch actuated spring-loaded wheel drops down as described above to participate in the door opening cycle. After operation, the door closes after a time delay 56.0 by the retraction spring mechanism as described above. Opening and closing is mechanically advantageous as it does not require the use of electricity or a motor.

[0083] Typically, in the three embodiments shown in Figures 1-6, 7-9, and 10-12, the present invention is unique, novel, and distinguishable from conventional electric door openers. It is a simple machine that requires no power, no electric motor, scanner, or traffic reader, and its mechanical advantages include the ability to maintain constant pressure against the floor surface through a ratchet wheel and spring-loaded hinge assembly. The door is opened hygienically when it is desirable to avoid diseases, viruses, bacteria, and other hazards, or when hands-free operation is required, such as when food service staff or warehouse personnel have both hands occupied. By using an economical device that can be added and / or retrofitted to any type of door, such as wood, hollow metal, metal-framed glass, or solid glass, via brackets, chassis mounting holes, or mounting plates, it facilitates entry and exit in all types, locations, and environments.

[0084] Typically, in the three embodiments shown in Figures 1-6, 7-9, and 10-12, the present invention is a unique, novel, and distinctive device that differs from conventional non-electric door openers, and is a simple machine that can provide the necessary mechanical advantages to safely open external and other doors without the use of hands, with an integrated delay. When paired with doors that have standard resistance due to the presence of ground or floor closers and spring hinges, it achieves the use of an ergonomically safe interface that is user-friendly.

[0085] In the embodiments shown in Figures 1 to 4, Figures 4A, 4B, 4C, 5A, 5B, and 6 are shown in conjunction with the preferred embodiments shown in Figures 1 to 4. However, it is known that Figures 4A, 4B, 4C, 5A, 5B, and 6 can also be used in the embodiments shown in Figures 7 to 9 and Figures 10 to 12.

[0086] The second embodiment shown in Figures 7, 8, and 9 describes a less desirable embodiment in which a friction slip clutch delay assembly is provided and the gear train consists of a main gear, an idler speed-increasing gear, and a secondary gear.

[0087] In the third embodiment shown in Figures 10, 11, and 12, other unsuitable embodiments are described in which there is no optional delay assembly and the gear train is a planetary gear assembly.

[0088] Furthermore, it goes without saying that the present invention can be modified in various ways within the scope of the gist of the invention as described in the claims. [Explanation of symbols]

[0089] Figures 1-6 1.0 Crank 1.0 Use of the feet, 1.1 Pedals, 1.11 Pedal Springs 1.2 Crank arm 1.3 Crank Axle 1.31 Crankpin 1.32 Bush 1.33 Arm return spring 1.331 Set screw 1.4 Arm guide bracket stop 1.41 Guide pin 2.0 Drive Assembly 2.1 Cable termination pins 2.11 "E" Clip Ring 2.2 Transmission Cable 2.3 Cable Drum 2.4 Termination / Tension Hub 2.41 Tensioner Lock Screw 2.5 Transmission shaft 2.6 Mainspring, Right-handed 2.7 Mainspring, left-handed 2.8 Tension fixing screw 3.0 Chassis 3.1 Main Chassis 3.2 Chassis mounting holes and screws 4.0 Gear train 4.1 Main gear with clutch bearing 4.11 Clutch bearing 4.2 Idler Speed ​​Increasing Gear 4.21 Idler axis 4.3 Secondary speed-increasing gear 431 axis 4.4 Drive Gears 4.5 Drive shaft 4.51 Bush 4.52 E-clip 5.0 Drive Wheel Assembly 5.1 Drive wheels 5.11 Drive wheel bearings 5.2 Wheel hub 6.0 Delayed Assembly 6.1 Spring-loaded pneumatic cylinder compression arm 6.11 Locking pin 6.2 Pneumatic double-acting cylinder with spring return 6.21 Cylinder shaft and clevis 6.22 Clevis Pin 6.23 E-clip 6.24 Airlines 6.25 Valve Assembly 6.251 Check valve 6.252 Orifice Diameter 6.3 Single-acting pin cylinder 6.31 Block 6.32 Plunger 6.4 Claws 6.41 Hinge Pin 6.5 Racket Spring 6.6 Return Spring 7.0 Towing / Tension Carriage Assembly 7.1 Fork Assembly 7.11 Guide 7.12 Guide pin stop 7.13 Fork Assembly Lifting Spring 7.2 Actuating Arm 7.21 Connection Link 7.3 Carriage Pressing Arm 7.31 Hinge pin 7.4 Tension Arm 7.41 Tension Arm Roller 7.5 Towing locking claw 7.51 Traction claw spring 7.52 Claw actuator shaft 7.6 Towing Spring 7.7 Trigger Lever 7.8 Trigger Actuator Pin 10 Safety MAX Door Opener 12 Unit Cover 13. Instructional Signage Graphics D Door G ground (Figure 7-9) 31.0 Crank Assembly 31.0 Foot utilization 31.1 Pedals 31.2 Crank arm 31.3 Crank axle 32.0 Drive Assembly 32.2 Transmission Arm 32.3 Drive claw 32.5 Transmission shaft 32.6 Mainspring, Right-handed 33.0 Chassis 33.1 Main Chassis 33.2 Chassis mounting holes and screws 34.0 Gear train 34.1 Main gear 34.11 Clutch bearing 34.2 Idler speed-increasing gear 34.21 Idler axis 34.3 Secondary speed-increasing gear 34.31 axis 34.4 Drive gear 34.5 Drive shaft 34.6 Transmission Gears 35.0 Drive Wheel Assembly 35.1 Drive wheels 36.0 Delayed Assembly 36.1 Friction Plates and Clutch Assembly 37.0 Towing / Tension Carriage Assembly 37.1 Bracket Arm 37.2 Actuating Arm 37.21 Connecting Arm 37.3 Carriage pressing arm 37.31 Hinge pin 37.4 Tension Arm 37.41 Tension Arm Roller 37.6 Towing spring 37.8 Trigger actuator pin 310 Safety MAX™ Door Opener D Door G ground Figures 10-12 51.0 Crank Assembly 51.0 Foot utilization 51.1 Pedals 51.2 Crank arm 51.3 Crank axle 51.32 Bush 51.33 Arm return spring 52.0 Drive Assembly (With spring) 52.6 Mainspring, Right-handed 52.7 Mainspring, left-handed 53.0 Chassis 53.1 Main Chassis 53.2 Chassis mounting holes and screws 54.0 Gear train 54.1 Planetary Gear Assembly 54.11 Clutch bearing 54.5 Drive shaft 54.51 Bush 55.0 Drive Wheel Assembly 55.1 Drive wheels 56.0 Delayed Assembly 57.0 Towing / Tension Carriage Assembly 57.1 Bracket Arm 57.11 Guide 57.12 Guide pin stop 57.31 Hinge pin 57.5 Towing lock ratchet and hinge 57.6 Towing spring 57.7 Trigger Lever 57.8 Wheel return lifting spring 510 Safety MAX™ Door Opener D Door G ground

Claims

1. A crank assembly having a crank arm for rotating the crank axle by pressing down on a foot pedal with a foot or cane, A drive assembly connected to the crank arm for winding one or more main springs, A gear train having a pre-selected speed increase ratio for transmitting power from the main spring to the drive wheel assembly, The drive wheel assembly includes a main drive wheel connected to the main drive shaft, A traction tension assembly for swinging open the door, which is operated when the crankshaft is rotated in conjunction with the winding of the main spring, The system includes a return spring attached to the crankshaft that returns the crankshaft to its home position, A foot-operated door opener that allows visitors to open doors without using their hands or electric assistance.

2. A crank assembly having a crank arm for rotating the crank axle by pressing down on a foot pedal with a foot or cane, A drive assembly connected to the crank arm, which drives a gear train having a pre-selected speed increase ratio for transmitting power from the main spring to the drive wheel assembly, The crank assembly and the crankshaft have a speed increase ratio of about 1 to 10 and rotate the gear train that winds one or more springs to supply the main spring to the drive wheel assembly, the drive wheel assembly includes a main drive wheel connected to the main drive shaft, and the drive assembly is a drive assembly, A traction tension assembly for swinging open the door, which is operated when the crankshaft is rotated in conjunction with the winding of the main spring, The system includes a return spring attached to the crankshaft that returns the crankshaft to its home position, A foot-operated door opener that allows visitors to open the door without using their hands or electric assistance.

3. A foot-operated door opener according to claim 1 or claim 2, having at least one of the following configurations: The gear train is a planetary gear train; The aforementioned main drive wheel is either a soft drive wheel or a pneumatic main drive wheel; The gear train includes a clutch bearing that allows the gear train to move in one direction without backlash or reversal; The gear train has a speed increase ratio of approximately 1 to 10.

4. A foot-operated door opener according to claim 1 or claim 2, having at least one of the following configurations: The foot-operated door opener further comprises a delay assembly that delays the release of the main spring's potential energy to the main drive shaft, in order to allow the weight of the entrant to be ergonomically and safely transferred to their feet, and to allow the entrant to comfortably step back to one side to eliminate the swing of the door, the delay assembly having a spring-loaded pneumatic cylinder or similar device pressed by the crankshaft when the pedal and crank arm are pressed down, the pneumatic cylinder having an adjustable needle valve or fixed orifice for releasing air from a compression chamber within the pneumatic cylinder, and adjusting the delay to release the stored potential energy from the main spring and to initiate the rotational cycle of the main drive wheel without loss of potential energy; The foot-operated door opener further comprises a delay assembly that delays the release of the potential energy of the main spring to the main drive shaft, in order to enable the weight of the entrant to be ergonomically and safely transferred to both of their feet, and to enable the entrant to comfortably step back to one side to eliminate the swing of the door, the delay assembly having a spring-loaded pneumatic cylinder or similar device pressed by the crankshaft when the pedal and crank arm are pressed down, the pneumatic cylinder having an adjustable needle valve or fixed orifice for releasing air from a compression chamber within the pneumatic cylinder, adjusting the delay to release the stored potential energy from the main spring and to start the rotational cycle of the main drive wheel without losing potential energy, the escaping air escapes from the compression chamber of the single-acting pin cylinder through the fixed orifice throttling, the delay adjusted, and when the pressure of the air is released, the delay assembly releases the stored energy of the wound torsion spring and frees the rotation of the drive wheel; The foot-operated door opener further comprises a delay assembly that delays the release of the potential energy of the main spring to the main drive shaft in order to enable the entrant to ergonomically and safely transfer their weight to their feet and enable the entrant to comfortably step back to one side to eliminate the swing of the door, the delay assembly having a spring-loaded pneumatic cylinder or similar device that is pressed by the crankshaft when the pedal and crank arm are pushed down, the pneumatic cylinder having an adjustable needle valve or fixed orifice for releasing air from the compression chamber within the pneumatic cylinder, and the main The pneumatic cylinder comprises a piston and a spring-loaded plunger or dashpot, the plunger pressing a pawl that engages with a ratchet wheel or sprocket directly connected to the main drive wheel, and when the pressure in the cylinder is released, the spring-loaded plunger releases the ratchet, the delay causing the stored potential energy from the main spring to be released and the rotation cycle of the main drive wheel to begin without loss of potential energy.

5. A foot-operated door opener according to claim 1 or 2, further comprising a delay assembly that delays the release of the potential energy of the main spring to the main drive shaft in order to enable the weight of the entrant to be ergonomically and safely transferred to both of their feet, and to enable the entrant to comfortably step back to one side and eliminate the swinging of the door, and having at least one of the following configurations: The delay assembly optionally includes a friction clutch or damper that restrains the drive wheel for a fixed or variable time, and by mechanically adjusting a spring-loaded plunger that presses a pawl that engages with a ratchet wheel directly connected to the main drive wheel, the pressure in the cylinder is released, the spring-loaded plunger releases the ratchet, the delay releases the stored potential energy from the main spring, and the rotational cycle of the main drive wheel begins without loss of potential energy; The delay assembly optionally includes a friction clutch or damper that restrains the drive wheel for a fixed or variable time, and by mechanically adjusting a spring-loaded plunger that presses a pawl that engages with a ratchet wheel directly connected to the main drive wheel, the pressure in the cylinder is released, the spring-loaded plunger releases the ratchet, the delay releases the stored potential energy from the main spring, and the rotational cycle of the main drive wheel is started without loss of potential energy, the damper being a dashpot cylinder; The delay assembly optionally includes a friction clutch or damper that restrains the drive wheel for a fixed or variable time, and by mechanically adjusting a spring-loaded plunger that presses a pawl that engages with a ratchet wheel directly connected to the main drive wheel, when the pressure in the cylinder is released, the spring-loaded plunger releases the ratchet, the delay releases the stored potential energy from the main spring, and the rotational cycle of the main drive wheel begins without loss of potential energy; the traction tension assembly is also actuated when the crank arm is pushed down, rotating the main shaft so that the push-down arm pulls down the bracket arm, engaging with a spring-loaded mechanism pushed down by the locking pawl, generating a constant downward pressure over a predetermined travel length, corresponding to the undercut below the door, the sill, and any incline in front of the door; The delay assembly optionally includes a friction clutch or damper that restrains the drive wheel for a fixed or variable time, and by mechanically adjusting a spring-loaded plunger that presses a pawl that engages with a ratchet wheel directly connected to the main drive wheel, the pressure in the cylinder is released, the spring-loaded plunger releases the ratchet, the delay releases the stored potential energy from the main spring, and the rotation cycle of the main drive wheel begins without loss of potential energy, and when the main spring unwinds at the end of the rotation, the actuation pin strikes an actuation trigger, releasing the locking pawl, and the spring-loaded mechanism raises the main drive wheel back to a stationary position ready for the next cycle; The delay assembly optionally includes a friction clutch or damper that restrains the drive wheel for a fixed or variable time, and mechanically adjusts a spring-loaded plunger that presses a pawl that engages with a ratchet wheel directly connected to the main drive wheel. When the pressure in the cylinder is released, the spring-loaded plunger releases the ratchet, the delay releases the stored potential energy from the main spring, and the rotation cycle of the main drive wheel begins without loss of potential energy. When the main spring unwinds at the end of the rotation, an actuation pin strikes an actuation trigger, releasing the locking pawl, and the spring-loaded mechanism raises the main drive wheel back to a stationary position ready for the next cycle. A further delay sequence assembly may be retrofitted to the trigger so that the delay is installed at both ends of the door opening and closing cycle.

6. The foot-operated door opener according to claim 1, wherein the drive wheel assembly is connected to the crank arm via a pair of steel cables wrapped around a drum, so that when the pedal and crank arm are pressed down, the cables rotate the drum and wind up the main spring.

7. A foot-operated door opener according to claim 1 or claim 2, having at least one of the following configurations: The foot-operated door opener can be added to interior doors that normally do not have the readily available hardware installed, or it can be added to doors that close automatically by standard spring-loaded or gravity hinges, or by ceiling or floor closing mechanisms that are standard on all doors while in operation; The one or more main springs mentioned above are all left-handed and right-handed; The chassis attached to the door houses substantially all of the operating elements of the foot-operated door opener; The traction tension assembly adjusts the adhesion, sliding, or friction coefficient on the surface on which various components selected from the group consisting of one or more bracket arms, actuating arms, connecting arms, carriage pressing arms, hinge pins, and tension arms having tension arm rollers move; The traction tension assembly further comprises a traction spring and a trigger actuator pin for adjusting the adhesion, slipperiness, or coefficient of friction on the surface on which various components selected from the group consisting of one or more bracket arms, actuating arms, connecting arms, carriage pressing arms, hinge pins, and tension arms having tension arm rollers move, thereby ensuring the smooth opening and closing of the door, and a friction slip clutch positioned between the drive wheel and the drive shaft.

8. We provide a hands-free, non-electric assist crank assembly having a crank arm that rotates from the home position and rotates the crank axle by pressing down on the foot pedal. The provision includes providing a cable assembly connected to the crank arm via a transmission shaft for winding one or more main springs, a) Provide a drive assembly connected to the transmission shaft connected to the crank arm for winding one or more main springs, and provide a gear train having a pre-selected speed increase ratio for transmitting power from the main springs to the drive wheel assembly, b) Providing a crank assembly and crankshaft for rotating the gear train for winding one or more main springs, having a speed increase ratio of about 1 to 10, and providing the crank assembly and crankshaft for supplying the main springs to the drive wheel assembly, The drive wheel assembly includes a main drive wheel connected to the drive shaft, The present invention optionally provides at least one of the following: a traction tension assembly for swinging open the door, which is operated when the crankshaft and the drive shaft are rotated in conjunction with the winding of the main spring; Optional, c) Provide a delay assembly that delays the release of the potential energy of the main spring to the main drive shaft in order to enable the weight of the entrant to be ergonomically and safely transferred to both of their feet, and to enable the entrant to comfortably move back to one side to eliminate the swinging of the door, or d) Provide a delay assembly that delays the release of the drive wheels at the end of the opening cycle in order to ensure a safe and ergonomic passage that allows the entrant to comfortably pass through the entrance before the integrated closing device closes the entrance door, A return spring is attached to the crankshaft and returns the crankshaft to its home position. A step in which an entrant opens the door using the foot-operated door opener without using their hands or electric assist, A carriage assembly is provided that accommodates all related mechanisms and the aforementioned relationships. To facilitate the fixing of the opener to the outer surface of a new or existing door, a hole is provided in the carriage. It provides a clamp subplate mechanism that facilitates installation on the exterior of various door types and minimizes potential damage to all types of doors. To provide an ergonomic cover for protecting the foot-operated door opener, which is provided on the outer surface of the door, from weather, dirt, and environmental conditions, A method for assembling and using a foot-operated door opener, providing a cover to protect, guard, and guide pedestrians from getting entangled in or falling over the foot-operated door opener.

9. e) The delay assembly includes a spring-loaded pneumatic cylinder pressed by the crankshaft when the pedal and crank arm are pressed down, the spring-loaded pneumatic cylinder having an adjustable needle valve or fixed orifice for releasing air from the compression chamber within the spring-loaded pneumatic cylinder, and adjusting the delay to release the stored potential energy from the main spring and to start the rotational cycle of the main drive wheel without losing potential energy, or f) The pneumatic cylinder comprises a piston and a spring-loaded plunger, the spring-loaded plunger pressing a pawl that engages with a ratchet wheel directly connected to the main drive wheel, and when the pressure in the cylinder is released, the spring-loaded plunger releases the ratchet, the delay releasing the stored potential energy from the main spring, and the rotational cycle of the main drive wheel is started without loss of potential energy, or further comprising a damper dashpot cylinder, or g) The method of claim 8, further comprising: the pneumatic cylinder having a piston and a spring-loaded plunger, the spring-loaded plunger engaging with a ratchet wheel directly connected to the main drive wheel, and when the pressure in the cylinder is released, the spring-loaded plunger releases the ratchet, the delay releasing the trigger mechanism to initiate the final cycle of the main drive wheel's ascent and initiate the closing of the door.

10. The method according to claim 9, wherein when the main spring unwinds at the end of rotation, the actuation pin strikes the actuation trigger, releasing the locking pawl, and the spring-loaded mechanism raises the main drive wheel back to a stationary position ready for the next cycle.

11. A method according to claim 8, comprising at least one of the following configurations: The gear train includes a clutch bearing that allows the gear train to move in one direction without backlash or reversal; The gear train includes a clutch bearing that allows the gear train to move in one direction without backlash or reversal, and the gear ratio of the gear train is about 1 to 10; The traction assembly is also actuated when the crank arm is pushed down, rotating the crankshaft so that the push-down arm pulls down the bracket arm, engaging with a spring-loaded mechanism pushed down by a locking claw, generating a constant downward pressure over a predetermined travel length, corresponding to the undercut below the door, the sill, and any incline in front of the door; The drive wheel assembly is connected to the gear train, which is connected to the transmission shaft and crank arm, via a set of steel cables wound around a drum, so that when the pedal and crank arm are pressed down, the cables rotate the drum and the transmission shaft, winding up the main spring; The aforementioned main springs are both left-handed and right-handed; The chassis attached to the door houses substantially all of the operating elements of the foot-operated door opener.

Images