A strike plate for receiving a bolt.
Doors typically have either or both a latch or a bolt for holding the door within a door jamb. For simplicity, “door” refers to movable barriers, usually slidable or hinged, for opening or closing and opening. “Bolt” refers to bolts, rods, and latches for fastening a door to a jamb except where noted or the context requires otherwise. Door jambs often have a bolt recess for receiving the door's bolt. Many bolt recesses have a strike plate with a strike plate opening aligned with the bolt recess. When properly installed, the door's bolt and the strike plate's opening are positioned and sized so the strike plate opening can receive the door's bolt. The strike plate opening is desirably small enough and placed so that when the door is closed within the door's jamb, the bolt can enter through the strike plate opening into the bolt recess and securely hold the door to the jamb. Attaching a strike plate to the door jamb reinforces the door jamb's bolt recess for securely holding the door within the jamb against the door being forced open without first retracting the bolt from the strike plate opening and bolt hole.
Door jambs, door bolt recesses, and door bolts are known in the art. Jambs and doors are often mass-produced with insets or markings for strike plates and bolts. These mass-produced items do not always adequately align at construction sites or at older buildings that may have shifted since initial construction.
Properly aligning the door's bolt and strike plate opening can be challenging when assembling a door within a door frame. The first step is typically to attach the door's hinges to the first side door jamb of the door frame. A worker typically fastens a strike plate to the second side door jamb over the bolt recess to receive the door's bolt.
However, the bolt and the strike plate opening must be aligned. Horizontal alignment is typically achieved by making the distance from the bolt's inner side to the jamb's inner face equal to the distance from the strike plate's inner side opening to the door jamb's inner face. The bolt and strike plate openings are shaped and sized so this positioning accomplishes horizontal alignment.
The bolt and strike plate openings must also be in vertical alignment for the bolt to enter the strike plate opening. Vertical alignment is more problematic than horizontal alignment. Obtaining vertical alignment lacks a bolt to inner jamb surface reference distance. Further, when the door is closed within the door jamb, the exact vertical alignment of the bolt and the strike plate opening may be mainly hidden from the on-site worker's view. Further, when the door is open, vertical alignment of the bolt and now distant strike plate opening may be challenging for the on-site worker to determine. As a practical matter, vertical alignment of the door bolt/strike plate opening is often begun by using factory markings and verified by on-site workers by closing the door into the door jamb and turning the knob of the door lock to move the bolt toward the strike plate opening to see if the bolt does or does not securely fit within the strike plate opening. If not, the door is opened, and the worker makes a new best guess concerning vertical alignment and tries again to align the bolt and strike plate opening properly.
However, removing, moving, and reinstalling a strike plate can be challenging. Strike plates are often attached to the door jamb with attachment screws. Attaching a strike plate to a door jamb may require threading screws through strike plate screw holes and screwing the screws into the second side door jamb. Correcting misalignment of the bolt and strike plate opening may require removing the strike plate screws, adjusting the position of the strike plate to the worker's best guess of an acceptable vertical alignment position, and reinstalling the strike plate to the jamb by threading the screws into different places on the door jamb.
On-site positioning and repositioning a strike plate on a door jamb to obtain proper alignment of the bolt and strike face opening on the fly by removing the strike plate screws, moving the strike plate, and resetting the screws into new door jamb positions can be aggravating and time-consuming.
Sometimes, a door jamb and door combination will have a proper vertical alignment for some years but later shift out of acceptable vertical alignment relative to each other. This may be caused by weather conditions, more or less atmospheric humidity, structural settling of the building, etc. Such shifting may cause the bolt and the strike plate opening to become misaligned. The bolt may then have difficulty entering the strike plate opening. Material misalignment may interfere with or even completely preclude the bolt from entering the strike plate opening. Repairing such later misalignment may require removing the strike plate screws, repositioning the strike plate, and resetting the screws into new door jamb positions. This can be aggravating and time-consuming. Security attachment screws, longer screws for providing security against forcing the door open, can be challenging to install and remove. If the face of an attachment screw is damaged, further insertion or removal is even more difficult. Old wood in the jambs of old buildings may be hard and brittle, resist screw removal and insertion, and may split.
There is a long felt need for a strike plate assembly that is serially vertically and securely adjustable on a door jamb without removing the assembly's jamb attachment screws and resetting them within new jamb holes and without loosening the attachment screws.
A strike plate assembly is repeatedly vertically and securely adjustable to serial secure positions on a door jamb for securing a bolt without loosening or removing the assembly's jamb attachment screws and without resetting its jamb attachment screws within new jamb holes.
Although the described apparatus may be usefully used in other orientations and shapes, “vertical,” as used in this description, means an orientation parallel to a typical door jamb 70 for a standard door, as shown in
Baseplate bolt opening 34 is preferably smaller than the door jamb bolt recess in jamb 70 and is sized and shaped to accept the door's bolt. Strike plate bolt opening 34 is preferably sized and shaped to securely receive the bolt. Preferably, bolt opening 34 securely holds there within the bolt and thereby holds the door against the jamb. This impedes or prevents air from flowing between the door and the jamb. It protects against the door being rattled against the jamb. Because strike plate opening is preferably sized and shaped to be just larger than the bolt and securely receive the bolt, its size, and shape do not change, even if the location of the bolt opening 44 needs to be adjusted to permit the bolt to enter after the vertical realignment of bolt opening 44. Strike plate bolt opening 44 is preferably vertically shorter and horizontally narrower than baseplate bolt opening 34 and is located within strike plate 10, so when strike plate 10 and baseplate 12 are aligned as a strike plate assembly 72 (
When assembled and installed upon a door jamb to engage a door bolt, rear face 14 of strike plate 10 is preferably fixed flush upon front face 16 of baseplate 12. Attachment openings 18, 20, 22, and 24 are beveled to receive screw heads 58, 60, 62, and 64 of attachment screws 50, 52, 54, and 56 (shown in
Baseplate 12 has baseplate columns of teeth 30 and 32 and baseplate bolt opening 34. As shown in
Baseplate columns of teeth 30 and 32 are preferably oriented parallel to the longitudinal axis of the door jamb 70, door, installed strike plate 10, and installed baseplate 12. Baseplate columns of teeth 30 and 32 preferably extend from the bottom of baseplate 12 to the top of baseplate 12, interrupted only by baseplate bolt opening 34. Columns of teeth 30 and 32 are shown in
Strike plate 10 has positioning slots 36 and 38, strike plate columns of teeth 40 and 42, and bolt opening 44. Strike plate bolt hole 44, depicted in
Strike plate columns of teeth 40 and 42 are vertically positioned and oriented on strike face rear face 14, as shown. Although the individual teeth and valleys of strike plate columns of teeth 40 and 42 can be manufactured into the baseplate in various manners, they are preferably stamped into strike plate 10. Relative to the flat surface of the strike plate rear face 14 plate, the peaks of the teeth are preferably equal to or less than the depth of the valleys and are preferably constant throughout columns 40 and 42. The height, depth, shapes, and orientation of the strike plate columns of teeth 40 and 42 should preferably match the height, depth, shapes, and orientation of the peaks and valleys of baseplate columns of teeth columns 30 and 32. Strike plate columns of teeth 40 and 42 extend from the bottom of strike plate 10 to the top of strike plate 10, interrupted by strike plate bolt opening 44. The description of baseplate columns of teeth 30 and 32 is generally applicable to strike plate columns of teeth 40 and 42
Strike face columns of teeth 40 and 42 and baseplate columns of teeth 30 and 32 are preferably sized, shaped, positioned, and oriented to mate with each other when strike plate 10 is compressed against baseplate 12 by tightening positioning screws 78 and 80 through strike plate openings 36 and 38 and baseplate positioning slots 26 and 28 and into the door jamb. Strike face columns of teeth 40 and 42 and baseplate columns of teeth 30 and 32 are preferably parallel to the longitudinal axis of the door jamb and door. Further, they are preferably generally parallel to the installed strike plate's and baseplate's longitudinal axes.
The function of the teeth can be somewhat accomplished with alternating wavy, vertical, crossed, or the like valleys and teeth. The outer baseplate face and the inner strike plate face may be entirely or partially comprised of an increased friction portion. The friction portion may be imprinted on the outer baseplate face, the inner strike plate face, or both or otherwise imposed, whether by scratching, etching, molding, machining, or otherwise, to make the plates less vertically slidable against each other.
Attachment openings 18, 20, 22, and 24 are beveled to receive screw heads 58, 60, 62, and 64 of attachment screws 50, 52, 54, and 56 (shown in
Attachment screws 50, 52, 54, and 56 are screwed within door jamb 70 and securely hold back plate 12 to door jamb 70. Because the size and slope of screw heads 58, 60, 62, and 64 correspond to the pitch of beveled openings 28, 20, 22, and 24, screw heads 58, 60, 62, and 64 of attachment screws 50, 52, 54 and 56 do not obstruct parallel planar fixation of strike plate 10 on baseplate 12. Strike plate 10 is thus capable of fitting flush against baseplate 12
Attachment screws 50, 52, 54, and 56 (shown in
Positioning screws 78 and 80 (shown in
The teeth and valleys of column 30 of baseplate 12 interlock with teeth and valleys of column 40 of strike plate 10, and the teeth and valleys of column 32 of baseplate 10 interlock with teeth and valleys of 42 of strike face 10. When the teeth and valleys of columns 30 and 32 are not interlocked with the teeth and valleys of columns 40 and 42, baseplate 10 and baseplate 12 are slidable relative to each other. When positioning screws 78 and 80 are inserted through face plate positioning openings 36 and 38 and threadably engaged with and tightly screwed into rear positioning openings 26 and 28, strike plate 10 is compressed against baseplate 12. This causes the teeth and valleys of columns 30 and 32 to interlock with the teeth and valleys of columns 40 and 42. When the teeth and valleys of columns 30 and 32 have meshed with the teeth and valleys of columns 40 and 42, baseplate 10 and baseplate 12 are not vertically slidable relative to each other. The respective opposing interlocking teeth and valleys create frictional and obstructing barriers to baseplate 10 vertically sliding on baseplate 12
In this configuration, front bolt opening 44 and rear bolt opening 34 define a strike hole 76, as shown in
The vertical position of strike hole 76 may be changed by partially or totally unscrewing and loosening positioning screws 78 and 80. Loosening or partial separation of strike plate 10 and baseplate 12 enables baseplate columns of teeth 30 and 32 to disengage from strike plate columns of teeth 40 and 42. This disengagement of columns of teeth 30 and 32 from columns of teeth 40 and 42 unfixes strike plate 10 from baseplate 12 and makes strike face 10 vertically movable relative to baseplate 12. If the on-site worker installing or readjusting judges strike plate bolt opening 44 to be too low relative to the bolt, the worker may slide or move loosened strike plate 10 upward relative to baseplate 12. If the worker judges strike plate bolt opening 44 too high relative to the bolt, the worker may slide or move loosened strike plate 10 downward relative to baseplate 12. The worker can then retighten positioning screws 78 and 80, which reengages strike plate 10's columns of teeth and valleys 40 and 42 with baseplate 12's columns of teeth and valleys 30 and 32. When the respective vertically opposing teeth and valleys are again meshed and interlocked, strike plate 10 is no longer movable or slidable relative to baseplate 12
This vertical adjustment can be made without varying the acceptable adjustment of strike plate 10 relative to the bolt. Removing this potential for on-site error is an important benefit of the described improvement relative to adjusting strike plate 10 position by removing attachment screws and judging/misjudging proper new attachment screw positions in the door jamb to produce a target new strike plate hole/bolt alignment. The new screw attachment position may produce an acceptable vertical strike plate hole/bolt alignment. Even if proper vertical alignment is produced, the new attachment screw position may not deliver horizontal strike plate hole/bolt alignment. The on-site worker, however, will only know the bolt does not enter the strike plate hole because the closed door jamb obscures visual inspection. The difficulty is increased for older structures with hardwood that may split.
The strike plate positioning opening will provide the discussed advantages if it has a vertical length of at least 50% longer than its horizontal width. The strike plate positioning opening will preferably have a vertical length of at least 100% longer than its horizontal width. Strike plate positioning opening will most preferably have a vertical length of at least 200% longer than its horizontal width. Longer and intermediate lengths may be advantageous in different circumstances.
Accordingly, the described structure permits vertical adjustment of the strike plate against the baseplate without loosening or repositioning attachment screws 50, 52, 54, and 56. This is a considerable advantage because these are large screws securely screwed into the jamb to prevent unwanted forced door opening by breaking the jamb. Loosening attachment screws 50, 52, 54, and 56 to slide baseplate vertically against the jamb is prevented by baseplate attachment openings 18, 20, 22, and 24. Further, loosening long and large attachment screws 50, 52, 54, and 56 may strip one or more attachment screw heads 58, 60, 62, and 64. Thus, the described structure, which permits vertical adjustment of the strike plate opening 44 without loosening attachment screws 50, 52, 54, and 56, is advantageous. Further, the alternative of completely removing and repositioning attachment screws 50, 52, 54, and 56 is time-consuming and challenging. Forcing these large screws into the jamb may split or weaken it.
In some embodiments, either or both baseplate columns of teeth 30 and 32 and strike plate columns of teeth 40 and 42 may be omitted. In such a structure, strike plate 10 may be sufficiently fixed upon baseplate 12 by tightening positioning screws 78 and 80. In this structure, strike plate 10 is slidable upon baseplate 12 when positioning screws 78 and 80 are loosened, and friction holds strike plate 10 and baseplate 12 together when positioning screws 78 and 80 are tightened. Alternatively, other anti-sliding impediments may be included between baseplate front face 16 and strike plate rear face 14 to prevent undesired sliding of strike plate rear face 14 against baseplate front face 16. This can be a roughened surface on one or both facing surfaces, dimples or protrusions, removable adhesive, or the like. Nevertheless, the mating baseplate columns of teeth 30 and 32 and strike plate columns of teeth 40 and 42 facilitate precise determinable and repeatable vertical adjustments of strike plate opening 44 without loosening or removing attachment screws 50, 52, 54, or 56. One or more attachment openings and attachment screws.
Baseplate opening 34 may be vertically longer than strike plate opening 44 to accommodate the bolt protruding through strike plate 44 and into baseplate opening 34 after strike plate 10 has been vertically adjusted against baseplate 12. Shapes and designs will vary with different door designs, knobs, sizes, and materials, i.e., brass, stainless, nickel, etc.
Strike plates may have more than one strike plate opening for accommodating any combinations of laches and bolts. The apparatus described is useful for all types of strike plates. Either latch strike plates or deadbolt strike plates may benefit from a structure and method of vertical adjustment that is useful during initial installation and later due to door shifting relative to the door jamb.
Unless otherwise stated or implied by context, “screws” include rod-like attachment means such as threaded screws, bolts, rods, or similar attachment means.
Unless otherwise noted, articles depicted in the drawings are not necessarily drawn to scale; however, the drawings depict relative size and placement. The term “about” is defined as being close to as understood by one of ordinary skill in the art, and in one non-limiting embodiment, the terms are defined to be within 10%. The term “substantially” and its variations are defined as being largely but not necessarily wholly what is specified as understood by one of ordinary skill in the art, and in a non-limiting embodiment, substantially refers to ranges within 1%. When “about” or “approximately” is provided at the beginning of a numerical list, the term modifies each number of the numerical list. In some numerical listings of ranges, some lower limits listed may be greater than some upper limits listed. One skilled in the art will recognize that the selected subset will require the selection of an upper limit above the specified lower limit. Unless otherwise indicated, all numbers expressing quantities and the like used in the present specification and associated claims are to be understood as being modified in all instances by the terms “about” or “approximately.” As used herein, “approximately” encompasses+/−5% of each numerical value. For example, if the numerical value is “approximately 80%,” it can be 80%+/−5%, equivalent to 75% to 85%. Accordingly, unless indicated to the contrary, the numerical parameters set forth in the following specification and attached claims are approximations that may vary depending upon the desired properties obtained by the exemplary embodiments described herein. At the very least, and not as an attempt to limit the application of the doctrine of equivalents to the scope of the claim, each numerical parameter should at least be construed in light of the number of reported significant digits and by applying ordinary rounding techniques.
The terms “inhibiting” or “reducing” or any variation of these terms refer to any measurable decrease, or complete inhibition, of the desired result. The terms “promote” or “increase” or any variation of these terms includes any measurable increase or completion of the desired result. The term “effective,” as used in the specification and/or claims, means adequate to accomplish a desired, expected, or intended result. The terms “a” or “an” when used in conjunction with the word “comprising” in the claims and/or the specification may mean “one,” but it is also consistent with the meaning of “one or more,” “at least one,” and “one or more than one.” The term “each” refers to each member of a set or each member of a subset of a set. The terms “comprising” (and any form of comprising, such as “comprise” and “comprises”), “having” (and any form of having, such as “have” and “has”), “including” (and any form of including, such as “includes” and “include”) or “containing” (and any form of containing, such as “contains” and “contain”) are inclusive or open-ended and do not exclude additional, unrecited elements or method steps.
It should be understood that, although exemplary embodiments are illustrated in the figures and description, the principles of the present disclosure may be implemented using any number of techniques, whether currently known or not. The present disclosure should not be limited to the exemplary implementations and methods illustrated in the drawings and description herein. Thus, although the invention has been described regarding specific embodiments, this description is not meant to be construed in a limited sense. Various embodiments may include some, none, or all of the enumerated advantages. Various modifications of the disclosed embodiments and alternative embodiments of the inventions will become apparent to persons skilled in the art upon reference to the description of the invention. It is, therefore, contemplated that the appended claims will cover such modifications that fall within the scope of the invention. Modifications, additions, or omissions may be made to the systems, apparatuses, and methods described herein without departing from the scope of the disclosure. For example, the operations of the systems and apparatuses disclosed herein may be performed by more, fewer, or other components in the methods described may include more, fewer, or other steps. Additionally, steps may be performed in any suitable order.
In interpreting the claims, it is not intended that any of the claims or claim elements invoke 35 U.S.C. 112(f) unless the words “means for” or “step for” are explicitly used in the particular claim.
This application claims priority to U.S. Patent Application No. 63/408,583, filed Sep. 21, 2022. This prior application is herein incorporated by reference in its entirety.
Number | Date | Country | |
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63408583 | Sep 2022 | US |