Outward swinging door barricade

Abstract

The emergency egress apparatus includes a protuberance mated to a first portion of the door barricade and a keeper mated to a second portion of the door barricade. A retainer is selectively disposed between one of two positions. A first position defines the placement of the retainer that establishes an interference fit between the protuberance and the keeper. A second position defines the placement of the retainer such that it is not in contact with the protuberance or the keeper. The first position secures the first portion of the door barricaded with respect to the second portion of the door barricade, and the second position decouples the first portion of the door barricade with respect to the second portion of the door barricade.

Claims

1. An emergency egress apparatus in combination with a door barricade, the combination comprising: a first portion of the door barricade comprising a protuberance extending therefrom, the first portion further comprising a faceplate having a receiver configured to receive a knob of a door; a second portion of the door barricade comprising a keeper therein, the keeper configured to receive the protuberance therethrough, the second portion further comprising a backplate having a backlash cam coupled thereto, the backlash cam configured to provide an interference fit between the backplate and a frame of the door; and a retainer selectively disposed between a first position and a second position, wherein when in the first position, the retainer establishes an interference fit between the protuberance and the keeper, and the second position of the retainer is the position in which the retainer is not in contact with the protuberance or the keeper.

2. The combination of claim 1, wherein the retainer is an inflexible rod.

3. The combination of claim 1, wherein the second portion further comprises: a handle extending away from the backplate and configured to enable a user to manipulate the door barricade.

4. An outward swinging door barricade comprising: a first portion of the door barricade comprising a plurality of protuberances extending therefrom, the first portion further comprising a faceplate and a faceplate extension, the faceplate having with a receiver therein configured to receive a knob of a door and the faceplate extension being coupled to and extending substantially perpendicular to the faceplate and having the plurality of protuberances extending therefrom; a second portion of the door barricade comprising a plurality of keepers therein, each keeper of the plurality is configured to receive the a corresponding one of the plurality of protuberances therethrough, the second portion further comprising a backplate and a backplate extension, the backplate having a cam coupled thereto and configured to provide an interference fit between the backplate and a frame of the door and the backplate extension being coupled to and extending substantially perpendicular to the backplate and having the plurality of keepers therein; and a retainer having a first position that establishes an interference fit between the plurality of protuberances and corresponding ones of the plurality of keepers and a second position that is not in contact with any of the plurality of protuberances or any of the plurality of keepers.

5. The outward swinging door barricade of claim 4, wherein the second portion further comprises: a handle extending away from the backplate and configured to enable a user to manipulate the door barricade.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present invention and, together with a general description of the invention given above, and the detailed description of the embodiments given below, serve to explain the principles of the present invention.

(2) FIG. 1 is a perspective view of a first side of an embodiment of the disclosed invention.

(3) FIG. 2 is a perspective view of a second side of an embodiment of the disclosed invention.

(4) FIG. 3 is a partial cut-away top view of an embodiment of the disclosed invention in use and attached to a door.

(5) FIG. 4 is a perspective view of an embodiment of the disclosed invention in use and attached to a door.

(6) FIGS. 5A-5C depict various aspects of an embodiment of the disclose invention incorporating an emergency egress feature.

(7) It should be understood that the appended drawings are not necessarily to scale, presenting a somewhat simplified representation of various features illustrative of the basic principles of the invention. The specific design features of the sequence of operations as disclosed herein, including, for example, specific dimensions, orientations, locations, and shapes of various illustrated components, will be determined in part by the particular intended application and use environment. Certain features of the illustrated embodiments have been enlarged or distorted relative to others to facilitate visualization and clear understanding. In particular, thin features may be thickened, for example, for clarity or illustration.

DETAILED DESCRIPTION OF THE INVENTION

(8) Turning attention to FIG. 1, the door barricade apparatus 10 includes a portion configured to interact with a lockset knob on a door (a knob portion 12), and a portion configured to interact with a jamb of a door (a jamb portion 14). It will be understood that locksets may be configured with a knob, a lever, a paddle, or the like. Therefore, for the purposes of the discussion that follows, the knob portion 12 shall be deemed equally suited for cooperation with a knob, lever, paddle, rigid pull handle, dummy trim, or other lock mechanism user interface. The knob portion 12 may include an indexing feature first portion 16. The indexing feature first portion 16 is configured to cooperate with an indexing feature second portion 18 that will be discussed in further detail below. The indexing feature first and second portion, 16 and 18, may include, by way of example and not limitation, grooves, channels, stippling, splines, projections and bores, or other features known by one of ordinary skill in the art to index the knob portion 12 with respect to the jamb portion 14. The configured index position may be secured by way of a first clamping screw 20. While a screw is depicted as the selected fastener, it may be recognized by one of ordinary skill in the art that cammed surfaces, a removable pin, spring loaded or deadlocking retainer, or other means may be used to fix the relationship between the first indexing feature 16 and second indexing feature 18 with respect to each other.

(9) The knob portion 12 further includes a faceplate 22 having a receiver 24 configured to slide over the spindle of a door's knob or lever. The receiver 24 is configured such that it has a width 26 large enough to accommodate the spindle of a knob, yet small enough to be trapped behind the knob of the door. Such an appropriately dimensioned receiver 24 may be said to establish a trapping relationship with respect to the door knob. The faceplate 22 is disposed in a substantially perpendicular relationship with a faceplate extension 28. Additionally, the faceplate 22 and backplate 34 are maintained in a substantially parallel relationship. It should be noted that the angle formed by the backplate 34 and backplate extension 36, as well as the faceplate 22 and faceplate extension 28, may each include acute or obtuse angles configured to accommodate varied door and hardware geometries. The faceplate extension 28 includes the indexing feature first portion 16 and may include a gusset 30 to support the perpendicular relationship of the faceplate 22 and faceplate extension 28 against distortion from loads applied thereto. Some embodiments may include a barb 32 configured to prevent the apparatus 10 from being slid up and over the knob, while the apparatus is under a load from an attempted door opening. The barb 32 becomes caught behind the underside of the knob or the lever, thus frustrating removal unless the door is fully closed.

(10) The jamb portion includes a backplate 34 and a backplate extension 36. The backplate 34 may include a first backplate portion 37 and a second backplate portion 38. The second backplate portion 38 may further include a backlash cam 40 attached thereto. Backlash shall be understood to mean the mechanical play or slop between mating components. The relationship between the first backplate portion 36 and second backplate portion 38 may be adjusted by an indexing feature third portion 42 and indexing feature fourth portion 44, respectively. The indexing feature third and fourth portion, 42 and 44, may include, by way of example and not limitation, grooves, channels, stippling, splines, projections and bores, or other features known by one of ordinary skill in the art to index the first backplate portion 37 and second backplate portion 38. A wide variety of lock backsets, jamb depths, and door thicknesses may be accommodated by way of the indexing feature first portion 16, second portion 18, third portion 42, and fourth portion 44, as will be described in further detail below. A handle 46 is disposed at a location sufficient to provide a user with easy manipulation of the apparatus 10, while simultaneously keeping the user's fingers and hands sufficiently away from the crushing hazard of the door and jamb interface.

(11) FIG. 2 depicts the apparatus 10 from an obverse view for clarity of the elements.

(12) Turning attention to FIG. 3, the apparatus 10 is shown in use. The receiver 24 of the apparatus 10 has been slid over the spindle 52 and is trapped behind the knob 50. The index feature first portion and second portion have been adjusted to establish a first distance 54. The first distance 54 has been configured to closely represent the measurement from the back side of the knob 50 and the front face of the frame 56 of the jamb 58. The adjustment of the first distance 54 is selected to be sufficient to remove much play from the apparatus 10 and mating surfaces of the frame 56, while not providing such an interference fit as to make installation and removal difficult for a user. Likewise a second distance 60 is established by the indexing feature third and fourth portions 42 and 44, respectively. The second distance 60 is configured to place the backlash cam 40 in close conformity with the outer edge of the frame 56. By extension, the second distance is also the measurement between the backlash cam 40 and the backplate extension 36. Moreover, rotating the backlash cam 40, drives a contact surface 41 until it touches or nearly touches the wall 43. By extension, rotating the backlash cam can be said to establish a third distance 64 between the faceplate 22 and the contact surface 41. The combination of the properly adjusted first distance 54, second distance 60, and third distance 64 serves to securely trap the apparatus 10 to the knob 50 and frame 56, thus preventing the door 62 from being opened by an undesired person.

(13) FIG. 4 depicts a perspective view of the apparatus 10 while in use. It should be noted that the main components of the apparatus 10 are assembled with handing screws 70. The handing screws allow for user disassembly of the apparatus 10, so as to modify the apparatus 10 to function on both left and right handed doors. Once the handing screws 70 are removed, the faceplate 22 and gusset 30 may be rotated and reattached to the apparatus 10. This will change the orientation of the receiver 24 (so that the open width 26 is oriented toward the floor during deployment), and likewise allows the gusset 30 to stay clear of the knob 50 while being deployed in the now reverse handed configuration. This may be described as configuring the apparatus 10 in either a left handed or right handed mode. It will be recognized by one of ordinary skill in the art that other fasteners may serve the same function as the handing screws 70, to include by way of example and not limitation, wingnuts, quarter turn (or other sub-revolution) fasteners, pins and retainers, and the like.

(14) Some embodiments of the disclosed invention include an emergency egress feature 80 as shown in FIGS. 5A-4C. A retainer 82 may be selectively disposed within a plurality of protuberances 84 that are mated to the faceplate extension 28. The protuberances 84 may be placed within, and protrude from, cooperating keepers 86 that are incorporated into the backplate extension 36. Once the protuberances 84 are placed within the mating keepers 86, the retainer 82 may be laced through the protuberances, thus trapping the faceplate extension 28 with respect to the backplate extension 36. The selection of appropriate cooperating protuberances 84 and keepers 86 may yield adjustability that is analogous to the first indexing feature 16 and the second indexing feature 18. In an emergency, the removable retainer 82 may be withdrawn, thus immediately decoupling the faceplate extension 28 from the first backplate portion 37. The previously secured door 62 may then be immediately opened.

(15) The retainer 82 may include a pin, rod, wire rope, or other suitable structure to retain the protuberances 84 with respect to the keepers 86. The removable retainer 82 may be inserted from the top or bottom of the apparatus 10, and may include auxiliary features to retain it therein (break-away seal, rubber endcaps, spring loaded or deadlocking ball detent, or the like). A plurality of rows of protuberances 84, for example a first row disposed near the faceplate 22, and a second row disposed near the backplate 34, may be employed to provide additional strength to the mating interface. In such multiple row configurations, the retainer 82 may comprise a u-shaped wire rope (aircraft cable) or heavy gauge wire having a central grasping point. As a result, a single pull by a user would serve to withdraw the retainer 82 from all protuberances 84. While the egress function has been described with respect to decoupling the faceplate extension 28 from the backplate extension 36, it will be understood by one of ordinary skill in the art that one may configure the emergency egress feature to decouple any of a plurality of elements of the apparatus 10, such that immediate opening of the door 62 is enabled.

(16) While the present invention has been illustrated by a description of one or more embodiments thereof and while these embodiments have been described in considerable detail, they are not intended to restrict or in any way limit the scope of the appended claims to such detail. Additional advantages and modifications will readily appear to those skilled in the art. The invention in its broader aspects is therefore not limited to the specific details, representative apparatus and method, and illustrative examples shown and described. Accordingly, departures may be made from such details without departing from the scope of the general inventive concept.