Patent Grant
7437900
The present invention is related to security devices, and more particularly, to an externally releasable security bar system for mounting on an inside surface of an inwardly swinging door and engaging a floor surface to prevent unauthorized entry through the door.
Nearly all doors used for entering and exiting homes, businesses, and other structures are equipped with a lock or a similar device designed to prevent the entry of unauthorized persons. One of the problems associated with a conventional lock is that the conventional lock is capable of being “picked” by someone with the proper skills. However, there are commercially available locks that are practically “pick-proof” by the average burglar or intruder.
Intruders have also breached locked doors by prying the door jamb with a crowbar or similar instrument. Typically with this method, the door jamb is damaged and the lock is effectively bypassed, thus allowing the intruder unimpeded entry into the structure.
There have been a number of devices designed over the years that function as a secondary measure to protect against a forced entry. These devices typically are in the form of a door brace that is wedged between the inside surface of the door and the floor surface. Some prior art door braces are only releasable from within the structure, and thus, are only suitable for use when an authorized person is inside the structure. On the other hand, several prior art door braces have the capability of being released from outside of the structure at the door's exterior.
The prior art door braces, however, have not achieved widespread commercial success for a number of reasons. One reason is that many of the prior art door braces get in the way of authorized entrants and must be stored when not in use. Another reason is that many of the door braces are unsightly, complex in construction, and expensive to manufacture. Additionally, some prior art door braces require special tools and experienced craftsmen to assemble and install.
There remains a need to provide an effective door brace that is inexpensive to manufacture, simple in construction, capable of installation by an average do-it-yourselfer, and is not an impediment to an authorized entrant or a storage problem.
In its most general configuration, the present invention advances the state of the art with a variety of new capabilities and overcomes many of the shortcomings of prior devices in new and novel ways. In its most general sense, the present invention overcomes the shortcomings and limitations of the prior art in any of a number of generally effective configurations. The instant invention demonstrates such capabilities and overcomes many of the shortcomings of prior methods in new and novel ways.
The present invention is an externally releasable security bar system for mounting on an inside surface of an inwardly swinging door and engaging a floor surface to prevent unauthorized entry through the door. The externally releasable security bar system may generally include a mounting plate, a bracing arm, a release pin, an actuation mechanism, and a locking mechanism.
The externally releasable security bar system is designed and configured for mounting on an inwardly swinging door. In one embodiment, a mounting plate may be fixedly secured to the inside surface of the door.
The externally releasable security bar system includes a bracing arm pivotally connected to the mounting plate. The bracing arm may have a proximal end and a distal end. The proximal end may be pivotally connected to the mounting plate to allow the bracing arm to pivot between a secured position and an unsecured position. The secured position corresponds to when the distal end is in contact with the floor surface, while the unsecured position corresponds to when the distal end is in a position elevated from the floor surface. Thus, when the bracing arm is in the secured position, the door is resistant to opening.
In one embodiment, the bracing arm may include an angled tip having an angle of about 20 degrees to about 30 degrees from the horizontal at the distal end to provide flush contact between the bracing arm and the floor surface. Additionally, the distal end may be provided with a friction enhancing surface to better engage the floor surface.
In another embodiment, the bracing arm may have a foot pivotally joined to the distal end of the bracing arm. The foot may be formed with a friction enhancing surface for engaging the floor surface.
In still another embodiment, the bracing arm may include a plurality of telescoping arm sections. The plurality of telescoping arm sections provides the user with the ability to selectively lengthen and shorten the bracing arm. In addition, the bracing arm may feature a spring loaded design to allow for extension and retraction of the bracing arm.
The externally releasable security bar system also includes a release pin. The release pin may be operable to pivot the bracing arm from the secured position to the unsecured position. The release pin may have a disengaged position where the release pin is not in contact with the bracing arm, which corresponds to the bracing arm secured position. Conversely, the release pin may have an engaged position where the release pin is in contact with the bracing arm, corresponding to the bracing arm unsecured position.
In one embodiment, the interface between the release pin and the bracing arm may comprise low-friction materials to allow for smooth pivoting of the bracing arm. Furthermore, the release pin may be a multi-section threaded pin to allow a user to selectively lengthen or shorten the release pin.
The externally releasable security bar system includes an actuation mechanism designed to transfer the release pin from the disengaged position to the engaged position. In one particular embodiment, the actuation mechanism may generally include a housing, a push button, and a spring. The housing may be formed with a seating recess, a stopping shoulder, and a handle. The push button may be designed to receive a portion of the release pin and may be configured to slidably cooperate with the seating recess. The push button may be configured to move between a non-compressed position and a compressed position. The spring may be sized to receive and encircle a portion of the release pin and may be configured to be compressed against the stopping shoulder. The release pin may also include a retaining ring. The retaining ring and the stopping shoulder help secure the spring in place within the housing and also provide surfaces between which the spring may be compressed.
In addition, the externally releasable security bar system includes a locking mechanism. The locking mechanism allows for the selective operation of the actuation mechanism. Thus, when the locking mechanism is locked, the actuation mechanism is inoperable such that the release pin cannot be transferred to the engaged position to pivot the bracing arm to the unsecured position. However, when the locking mechanism is unlocked, the actuation mechanism is operable to transfer the release pin to the engaged position, which causes the bracing arm to pivot to the unsecured position allowing for unobstructed entry through the door.
In still another embodiment, the externally releasable security bar system may further include a storage clip. The storage clip may be fixedly secured to the inside surface of the door and may be configured to retain a portion of the bracing arm of the externally releasable security bar system. In this embodiment, the bracing arm is pivotally connected to the mounting plate such that the bracing arm may pivot to a substantially vertical position to engage the storage clip. Thus, the storage clip helps eliminate any problem associated with storing the externally releasable security bar system.
In operation, an occupant would first open the door with the bracing arm in the unsecured position. When exiting through the door, the occupant may allow the bracing arm to pivot to the secured position with the distal end contacting the floor surface. The distal end will drag along the floor surface when door is closing until the door is completely closed. At this point, the bracing arm will be in the secured position. After exiting through the door, the occupant may lock the locking mechanism so that the actuation mechanism is disabled and cannot transfer the release pin to the engaged position.
Upon returning to the structure and desiring entry through the door, the occupant may unlock the locking mechanism so that the actuation mechanism is in an operable mode. Next, the occupant may use the actuation mechanism to transfer the release pin from the disengaged position to the engaged position. When the release pin is moved to the engaged position, the release pin causes the bracing arm to pivot to the unsecured position. In the unsecured position, the distal end is no longer in contact with the floor surface, and the occupant is able to open the door without obstruction. The occupant may then choose to lock the locking mechanism to disable the actuation mechanism before closing the door.
The instant invention enables a significant advance in the state of the art. The instant invention is, in addition, widely applicable to a large number of applications. Variations, modifications, alternatives, and alterations of the various embodiments may be used alone or in combination with one another, as will become more readily apparent to those with skill in the art with reference to the following detailed description of the preferred embodiments and the accompanying figures and drawings.
Without limiting the scope of the present invention as claimed below and referring now to the drawings and figures:
An externally releasable security bar system (50) for mounting on an inside surface of an inwardly swinging door (10) and engaging a floor surface (20) to prevent unauthorized entry through the door (10) enables a significant advance in the state of the art. The preferred embodiments of the apparatus accomplish this by new and novel arrangements of elements that are configured in unique and novel ways and which demonstrate previously unavailable but preferred and desirable capabilities. The detailed description set forth below in connection with the drawings is intended merely as a description of the presently preferred embodiments of the invention, and is not intended to represent the only form in which the present invention may be constructed or utilized. The description sets forth the designs, functions, means, and methods of implementing the invention in connection with the illustrated embodiments. It is to be understood, however, that the same or equivalent functions and features may be accomplished by different embodiments that are also intended to be encompassed within the spirit and scope of the invention.
Referring generally to
With reference now to
Still referring to
The pivoting connection may be accomplished in a number of ways. For example, in one embodiment, the pivoting connection may be made by passing a shoulder bolt, or similar fastener, through mounting holes formed in the mounting plate (100) and the bracing arm (200), and securing the bolt with a washer and nut.
As previously mentioned, the distal end (220) of the bracing arm (200) is configured to contact the floor surface (20) when the bracing arm (200) is in the secured position (202). In one embodiment, the bracing arm (200) includes an angled tip, with an angle of about 20 degrees to about 30 degrees from the horizontal, at the distal end (220) to help engage the floor surface (20). Although an angle of about 20 degrees to about 30 degrees is specifically disclosed, one with skill in the art would appreciate that the angled tip may be formed with any number of angles, some larger than 30 degrees and some smaller than 20 degrees. Providing an angled tip at the distal end (220) allows for flusher contact between the bracing arm (200) and the floor surface (20). Additionally, the angled tip at the distal end (220) may have a friction enhancing surface to better engage the floor surface (20). For example, the angled tip at the distal end (220) may have a layer of rubber, or a similar material, that exhibits a high coefficient of friction when used in connection with a typical floor surface (20).
In another embodiment, the bracing arm (200) may have a foot (230). The foot (230) may be pivotally joined to the distal end (220) of the bracing arm (200), as seen in
In yet another embodiment, the bracing arm (200) may have a telescoping design. As seen in
In still another embodiment, the bracing arm (200) having a plurality of telescoping arm sections (240) may feature a spring loaded design. The bracing arm (200) may feature a spring loaded design that allows for extension of the bracing arm (200) to the secured position (202). Additionally, the bracing arm (200) may feature a spring loaded design that allows for retraction of the bracing arm (200) to the unsecured position (204).
With reference now to
In one embodiment, the release pin (300) may be a multi-section threaded pin. Each section of the multi-section threaded pin may have a threaded female end and a threaded male end sized and configured for cooperative engagement with one another. By engaging or disengaging the threaded female end of a section with the threaded male end of a section, the release pin (300) may be selectively lengthened or shortened. The multi-section threaded pin allows a user to fine tune the pivoting movement of the bracing arm (200) to ensure that the distal end (220) of the bracing arm (200) is sufficiently distanced above the floor surface (20) to allow unobstructed entry through the door (10). Additionally, the multi-section threaded pin accommodates the use of adjustable bracing arm (200) designs, as well as a range of mounting heights, by providing a user with the ability to lengthen or shorten the release pin (300) to ensure the functionality of the externally releasable security bar system (50).
In order to ensure a smooth pivoting motion when the release pin (300) contacts the bracing arm (200), the interface between the release pin (300) and the bracing arm (200) may be a low-friction interface. For example, in one embodiment, the release pin (300) may include a roller tip for contacting the bracing arm (200). In operation, as the release pin (300) applies force to the bracing arm (200), the roller tip rolls along the bracing arm (200) resulting in the bracing arm (200) smoothly pivoting to the unsecured position (204). Additionally, a portion of the bracing arm (200) and the release pin (300) may be formed with low-friction materials, such as nylon, Teflon, or other smooth, synthetic materials.
Referring again to
Referring now to
When a compressive force is applied to the push button (420), the push button (420) moves from the non-compressed position (422) to the compressed position (424). This movement transfers the release pin (300) from the disengaged position (302) to the engaged position (304), which results in the bracing arm (200) pivoting to the unsecured position (204). When the compressive force is removed, the spring (430) biases the push button (420) back to the non-compressed position (422), which allows the bracing arm (200) to pivot back to the secured position (202).
In another embodiment of the present invention, the externally releasable security bar system (50) may include a locking mechanism (500). The locking mechanism (500) allows for the selective operation of the actuation mechanism (400). For example, when the locking mechanism (500) is locked, the actuation mechanism (400) is inoperable such that the release pin (300) cannot be transferred to the engaged position (304) to pivot the bracing arm (200) to the unsecured position (204). However, when the locking mechanism (500) is unlocked, the actuation mechanism (400) is operable to transfer the release pin (300) to the engaged position (304), which results in the bracing arm (200) pivoting to the unsecured position (204) to allow unobstructed entry through the door (10).
In one embodiment, the locking mechanism (500) may be a conventional type of lock operated by a key (30), as seen in
In yet another embodiment of the present invention, the externally releasable security bar system (50) may be configured such that the locking mechanism (500) is housed within the push button (420), as seen in
In still another embodiment, the externally releasable security bar system (50) may further include a storage clip (60). The storage clip (60) may be fixedly secured to the inside surface of the door (10) and configured to retain a portion of the bracing arm (200) when the externally releasable security bar system (50) is not in use, as seen in
The storage clip (60) eliminates any problem associated with storing the externally releasable security bar system (50). For example, in one embodiment, if the externally releasable security bar system (50) is not in use, the bracing arm (200) may be pivoted from the secured position (202) to a substantially vertical position and placed within the storage clip (60). The bracing arm (200) may be designed and installed such that it pivots about 150 degrees or more to reach the substantially vertical position, flush with the door (10), as seen in
The components of the externally releasable security bar system (50) may be fabricated from various materials. For example, the mounting plate (100), bracing arm (200), release pin (300), and actuation mechanism (400) may be constructed from a number of materials, including, but not limited to, high strength aluminum, high strength plastics, steel, combinations of these materials, or any other type of material that is lightweight and durable.
In operation, an occupant would first open the door (10) with the bracing arm (200) in the unsecured position (204). When exiting through the door (10), the occupant may allow the bracing arm (200) to pivot to the secured position (202) with the distal end (220) contacting the floor surface (20). The distal end (220) will drag along the floor surface (20) when closing the door (10) until the door (10) is completely closed. At this point, the bracing arm (200) will be in the secured position (202). Before or after exiting through the door (10), the occupant may lock the locking mechanism (500) so that the actuation mechanism (400) is not capable of transferring the release pin (300) to the engaged position (304).
Upon returning to the structure and desiring entry through the door (10), the occupant may unlock the locking mechanism (500) so that the actuation mechanism (400) is in an operable mode. Next, the occupant may use the actuation mechanism (400) to transfer the release pin (300) from the disengaged position (302) to the engaged position (304). When the release pin (300) is moved to the engaged position (304), the release pin (300) causes the bracing arm (200) to pivot to the unsecured position (204). In the unsecured position (204), the distal end (220) is no longer in contact with the floor surface (20), and the occupant is able to open the door (10) without obstruction. The occupant may then choose to lock the locking mechanism (500) to disable the actuation mechanism (400) before closing the door (10).
The externally releasable security bar system (50) of the present invention may be available as an after-market kit. Providing the externally releasable security bar system (50) as an after-market kit would allow any do-it-yourselfer to retrofit any type of door (10) with the externally releasable security bar system (50). The after-market kit may include all of the components of the externally releasable security bar system (50), as well as any fasteners required for proper installation.
Numerous alterations, modifications, and variations of the embodiments disclosed herein will be apparent to those skilled in the art and they are all anticipated and contemplated to be within the spirit and scope of the instant invention. For example, although specific embodiments have been described in detail, those with skill in the art will understand that the preceding embodiments and variations can be modified to incorporate various types of substitute and or additional or alternative materials, relative arrangement of elements, and dimensional configurations. Accordingly, even though only few variations of the present invention are described herein, it is to be understood that the practice of such additional modifications and variations and the equivalents thereof, are within the spirit and scope of the invention as defined in the following claims.
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