Not Applicable.
The present invention is related generally to devices for the opening, closing and latching of doors without the use of hands, and more specifically, to a novel door opening, closing and latching device that allows for the latching and/or unlatching and the opening and/or closing of a door, all by foot actuation without requiring the foot to engage the door itself or engage a traditional door handle or knob. It is contemplated that the device can alternatively be used in conjunction with a foot-actuated remote door opening apparatus.
Door openers and latches are very old in the art, and many configurations of door opening and closure devices exist that are currently available to the public. These include for example, various latches, handles, grips, knobs, locks, and hooks. Each of these devices has its own manner of engagement with the door to allow the opening of the door, and nearly all of these devices require the use of one or both of a person's hands. For example, handles, grips and knobs all require the user to grasp the device with one or both hands, and in some cases manipulate the device or the door with the hand or hands, to open the door. Yet, occasions can and do arise in which a door will need to be latched or unlatched and opened or closed without using a hand. For example, when both hands are carrying items, when one or more of the hands or arms are injured, when the hands are dirty or soiled, or when the door is damaged or heated as from a fire and cannot be touched by hand. It is also desirable to enable the latching and opening of a door without the use of hands when the spread of germs or other contagions or pathogens is of concern, or to enable a disabled individual who has limited functionality of the hands to open the door. Other such circumstances can be readily envisioned that would lead one to desire a mechanism to open or latch a door without the use of hands.
However, while door openers exist that operate to latch or unlatch and open or close a door (for example, through the use of remote sensors, key codes and electronic passkeys), such devices have shortcomings. For example, the remote sensors require additional and sometimes complex electronics in order to operate. Passkeys require the use of a card or other physical device to activate the door, and such physical devices are subject to being lost, stolen or damaged. Further, such devices typically require the use of a hand or both hands to operate the device so as to open or close the door or to latch or unlatch the door. Yet, even when such remote door openers are foot-actuated, it may be desirable to further mechanically latch the door with foot-actuation to ensure the door will remain closed even when remotely “opened.”
A need therefore exists for a compact, uncomplicated door latch and opener that can be easily manipulated with a person's foot to mechanically latch and/or unlatch and/or open and/or close a door.
The illustrative embodiments of the present invention are shown in the following drawings which form a part of the specification:
Corresponding reference characters indicate corresponding parts throughout the several views of the drawings.
While the invention will be described and disclosed here in connection with certain preferred embodiments, the description is not intended to limit the invention to the specific embodiments shown and described here, but rather the invention is intended to cover all alternative embodiments and modifications that fall within the spirit and scope of the invention as defined by the claims included herein as well as any equivalents of the disclosed and claimed invention.
In referring to the drawings, a first representative embodiment of the novel foot-actuated door latch and strike apparatus 10 of the present invention is shown generally in
A sunken linear rectangular slide track 26 extends across the center of the base plate 14 parallel to the proximal edge 18 and distal edge 20. The track 26 has a uniform width of just over one half inch and a uniform depth of approximately one quarter inch. The track 26 has a first end 28 and a second end 30, with a cut-through linear slot 32 of approximately one quarter inch width formed in the center of the track 26. The slot 32 runs parallel to the proximal edge 18 and distal edge 20, and extends from a point approximately one half inch from the first end 28 to a point approximately one half inch from the second end 30.
The rear plate 16 projects upward from and perpendicular to the proximal edge 18. The rear plate 16 extends the full length of the proximal edge 18 and gradually and uniformly arches upward across its full length to a maximum height at its center point of approximately one and a half inches above the proximal edge 18. A set of three holes H-1 are formed in the rear plate 16 as shown. The holes H-1 each have a diameter that is slightly larger than the shank diameter of the screw mounts M, such that the shanks of the screw mounts M can readily slide into the holes H-1 to secure the rear plate 16 to the door D as can be readily understood.
The door latch and strike apparatus 10 further includes a slide bolt 34 positioned in the track 26. The slide bolt 34 is formed from a strap of rigid metal approximately one half inch wide and one eighth inch thick, with a flat and rectangular lower glide portion 36, a first right angle hook or engagement end 38, a second right angle hook 40 and an actuation protrusion or arm 42 that extends vertically from the end of the second hook 40 perpendicular relative to the glide portion 36. The engagement end 38 and the second hook 40 both extend approximately one quarter inch upward from the glide portion 36 and are oriented such that their ends face each other over the glide portion 36 as shown. Thus, as can be appreciated, the slide bolt 34 is adapted such that the glide portion 36 fits within and slides horizontally along the track 26 with the engagement end 38 and hook 40 directed upward above the track 26. In addition, a pair of threaded bores 43 are positioned along the centerline of the glide portion 36. The bores 43 are adapted to receive stop screws S-1 that extend from below the base plate 14, through the linear slot 32 and into the underside of the glide portion 36. The heads of the stop screws S-1 are sized to fit within the linear slot 32. When secured to the underside of the glide portion 36 in the bores 43, the stop screws S-1 limit the horizontal travel of the slide bolt 34 along the track 26 as the heads of the stop screws S-1 encounter their respective ends of the linear slot 32.
The door latch and strike apparatus 10 further includes a rigid metal cover 44 that is positioned over and attached to the mounting bracket 12 by the screw mounts M when the mounting bracket 12 is secured to the door D. The cover 44 is shaped to match and conform to the top of the base plate 14 over which the cover 44 is positioned. The cover 44 has a flat base 46, a perpendicularly upturned flat rear plate 48 and a parallel upturned flat front lip or plate 50. The rear plate 48 matches in shape the rear plate 16 of the mounting bracket 12. A set of three holes H-2 are formed in the rear plate 48 as shown and are positioned to correspond to the positioning of the holes H-1 in the rear plate 16. Like the holes H-1, the holes H-2 each have a diameter that is slightly larger than the shank diameter of the screw mounts M, such that the shanks of the screw mounts M can readily slide into the holes H-2 to secure the rear plate 48 to the rear plate 16 as can be readily understood.
The cover 44 is configured such that the base 46 fits flush against the upper surface of the base plate 14, and the rear plate 48 fits flush against the front face of the rear plate 16, when the cover 44 is secured to the mounting bracket 12 by the screws S-2. The front plate 50 projects upward from and perpendicular to the front edge of the base 46 where it gradually and uniformly arcs upward across its full length to a maximum height at its center point of approximately one half inch above the base 46.
As can be appreciated, when the slide bolt 34 is properly positioned in the track 26 as shown in
As can be seen in
The door latch and strike apparatus 10 also includes a strike 52, formed from a vertically oriented metal plate having a height of approximately four inches. The strike 52 is adapted to secure to the base of the door jamb J in proximity to the mounting bracket 12 when the mounting bracket 12 is mounted to the door D (see
When the strike 52 is properly attached to the jamb J, the lower cut-out 58 receives the engagement end 38 when the slide bolt 34 is directed toward the strike 52, preferably by a user's foot applying force to the actuation arm 42 of the engagement end 38 (see
One of ordinary skill in the art will recognize that the bores 43 for the stop screws S-1 are positioned along the underside of glide portion 36 of the slide bolt 34 so as to enable the slide bolt 34 to travel horizontally along the track 26 and at one end to fully engage the engagement end 38 with the strike 52, while at the other end fully disengage and clear the engagement end 38 from the strike 52. Further, the stop screws S-1 are positioned along the underside of glide portion 36 of the slide bolt 34 to keep the slide bolt 34 in the track 26 with horizontal travel limited by the stop screw S-1.
It will be appreciated that in practice, a user may operate the latch and strike apparatus 10 so as to enable the opening and closing of the door D by using a foot to push or urge the actuation arm 42 without the need to use hands. In particular, by using a foot to urge the engagement end 38 of the slide bolt 34 toward the door jamb J when the door D is substantially engaged with the jamb J, to thereby engage the engagement end 38 with the lower cut-out 58, the latch and strike apparatus 10 will secure the door D in its closed position proximate the jamb J. (See
Various other configurations of the novel door opener are also contemplated.
For example,
As can be seen, the screw mounts M are inserted through a set of holes H-4 in the rear plate 116. Like the holes H-1, H-2 and H-3, the holes H-4 each have a diameter that is slightly larger than the shank diameter of the screw mounts M, such that the shanks of the screw mounts M can readily slide into the holes H-2 to secure the rear plate 116 to face of the door D opposite the rear plate 48 as shown.
As another example,
As another example,
As another example,
As another example,
While I have described in the detailed description several configurations that may be encompassed within the disclosed embodiments of this invention, numerous other alternative configurations, that would now be apparent to one of ordinary skill in the art, may be designed and constructed within the bounds of my invention as set forth in the claims. Moreover, the above-described novel door latch, such as for example, the door latches 10, 100, 200, 300, 400 and 500, of the present invention can be arranged in a number of other and related varieties of configurations without departing from or expanding beyond the scope of my invention as set forth in the claims.
For example, the latch and strike apparatus of the present disclosure can be adapted to work without a strike plate, such as the strike 52, but instead the engagement end 38 of the strike bolt 34 can be configured to engage a detent or opening that has been cut or formed in the jamb J, or simply engage a brace or stop that is part of the jamb J construction.
By way of further example, the slide bolt 34 is not limited to the specific shape as depicted in the Figures, but can comprise a variety of shapes and sizes, such as for example, a peg, a piston, or a push rod, etc., so long as the device is capable of selectively engaging the door jamb J. Further, the actuation portion of the slide bolt 34 (or other engaging components) need not be specifically shaped as depicted in the disclosed embodiments, but may be configured in a wide variety of shapes and sizes so long as the actuation portion provides a platform or grip for the user's foot to readily operate the engaging mechanism of the latch and strike apparatus to engage the latch with the door jamb J.
Moreover, the mechanism latching the mounting bracket 12 to the door jamb J need not operate as a slide (e.g., the slide bolt 34), but can be mechanism based upon a variety of configurations, including for example, a screw, a pivot, twist bolt, a spring loaded button, an electrical or mechanical servo or stepper motor, etc., so long as the device can be attached to the mounting bracket 12 near the base of the door D and can be actuated by the user's foot to engage the latch with the door jamb J.
Moreover, the engaging mechanism (e.g., the slide bolt 34) can be fully powered or power assisted through the use, for example, of various biasing members, hydraulic or pneumatic pressure, or electric motors or drives.
Additional variations or modifications to the configuration of the novel door latch, such as for example, the door latches 10, 100, 200, 300, 400 and 500, of the present invention may occur to those skilled in the art upon reviewing the subject matter of this invention. Such variations, if within the spirit of this disclosure, are intended to be encompassed within the scope of this invention. Therefore, the description of the embodiments as set forth herein, and as shown in the drawings, is provided for illustrative purposes only and, unless otherwise expressly set forth, is not intended to limit the scope of the claims, which set forth the metes and bounds of my invention.
This application claims the benefit of U.S. Provisional Application No. 62/725794, filed Aug. 31, 2018, which U.S. provisional application is incorporated herein by reference.
Number | Date | Country | |
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62725794 | Aug 2018 | US |