Patent Publication Number: US-11384584-B2

Title: Structuring for cushioning deadbolt and/or latch at door frame

Description:
This application is a continuation of application Ser. No. 14/978,249, filed Dec. 22, 2015 (now U.S. Pat. No. 10,724,286, which claims priority on U.S. provisional application No. 62/095,377, filed Dec. 22, 2014, the disclosures of which are all hereby incorporated herein by reference in its entireties. 
    
    
     BACKGROUND AND SUMMARY 
     A door frame has a mortise or recess that accepts a strike plate, that is typically made of metal, in the rabbet of the frame. When a door closes, the strike plate accepts or receives, and retains, the latch and the deadbolt from the lockset that is mortised into the door. Either or both can secure the door in place for the purpose of, for example, protection from smoke/fire and/or security. 
     As a door closes into the locked or latched position, the latch on the edge of the door meets what is often a curved lip on the strike plate. However, some strike plates have no curved lip, and that have a lip that is simply straight with no curve. The lip of the strike plate often extends above the face of the frame. The lip allows the latch to begin to retract and facilitates or eases the engagement of the door in to the frame. This point of engagement, or contact, can produce a noticeable metal sound. It can be dramatically accentuated if the frame is metal and/or if a metal frame is hollow inside and does not have a solid material such as mortar filling the cavity. 
     Moreover, improper or inconsistent installation of frames and doors can adversely affect the security of the intended closing and latching. The frames may be set too tightly or too loosely. Any of the three sides of a frame can possibly be twisted, which further hinders the ease of the closing and latching of the door. This can affect the security and/or the safety of the door opening if the door does not close easily and completely. Any condition that inhibits the ease of closing and latching usually results in a field fix of making adjustments on the spring hinges or door closers that make them close faster and slam shut. This increases the undesirable noise of a metal latch hitting a frame that can also be metal. 
     Manufacturers of locksets sometimes provide the strike plate which is to be installed in the rabbet of the door frame. Lips of the strike plate, which lips are oriented so as to face the closing door, can have different heights and different profiles such as different profiles of curved lips. Manufacturers of locksets also have latches extending out of the lockset, on the edge of the door, that have different angles. 
     For example, it may be desirable for the guest entry door in a hotel to be self-closing and self-latching to meet fire code. These doors may also self-lock and some may have automatic deadbolts that engage when the door enters a latched position. Moreover, some deadbolts are manually engaged (e.g., extended) from the inside of a door by a user turning a thumb turn on the inside face of the trim plates or face of the door. When a deadbolt is extended before a door is closed, and then the door is closed, it can cause an extremely loud banging noise when the deadbolt hits the lip of the strike plate and/or the frame. It is also noted that for some locks that have automatic extension of a deadbolt, one can activate the deadbolt before the door closes by depressing a secondary latch in the bottom of the edge of the lock. People often like to extend the deadbolt (sometimes known as “throwing the deadbolt”) so that they can prop the door open to perhaps get ice or sometimes to simply leave it open in case they want to go back into a room at some point. Maids in hotels also tend to throw the deadbolt to hold doors open when a hotel room is being cleaned. 
     A problem is that the deadbolt can slam against the face of the frame and/or against the lip of a strike plate, and make a loud sound and possibly damage structure. The lip of the strike plate is often located beyond/above the frame. This can cause guest noise complaints in hotels concerning slamming doors. It can also damage the core of a door because it puts increased torque on the screws holding the lock inside the edge mortise of the door. If the door and/or frame is wood, it can also split the edge of the door and/or damage a wood frame. If the door is metal it can bend the tap plates that secure the lock body in the mortise. It can also damage the electronics of locksets. 
     It will be appreciated from the above that there exists a need in the art for addressing noise and/or damage issue when doors with extended deadbolts are shut, closed, or the like. It may be desirable to quiet the sound of an extended deadbolt when it is closed on a door frame and/or strike plate. It may be also desirable to quiet the sound of the engagement of a metal latch when it hits the metal strike plate. It may also be desirable to address variations in strike plates with respect to variations in strike lip profiles and/or variations of angles of lock latches. 
     Accordingly to example embodiments of this invention, a structure may be provided for cushioning an extended deadbolt of a door when the door with the extended deadbolt is moved from an open position to a closed position. The inside of the cushioning structure may have springs and/or a soft cushioning material such a foam. It could be one, two or more springs in certain example embodiments, and/or one or more pieces of foam. An example design of a spring may be conical in shape so that it may recess in to itself when fully or substantially fully compressed. A conical spring could also be set inside of a coiled spring that is a fraction (e.g., about half) the height of the conical spring. This may allow the extended deadbolt to bottom out for doors that hit the strike plate and/or frame with a greater speed and force. One could increase the tension on one or more springs. As discussed herein, foam may also be used for force absorbing material in cushioning structures in various embodiments of this invention. The cushioning structure may be telescoping in nature in example embodiments of this invention. 
     In certain example embodiments of this invention, there is provided a deadbolt cushioning system comprising: a deadbolt cushioning structure attached to a door frame, so that when a door with a fully extended deadbolt closes from a wide open position toward a closed position the extended deadbolt impacts the deadbolt cushioning structure, the deadbolt cushioning structure for preventing the extended deadbolt from impacting the door frame and for preventing the extended deadbolt from impacting a strike plate attached to the door frame; wherein the deadbolt cushioning structure includes a first housing and second housing with a biasing structure provided therebetween, the biasing structure comprising foam and/or a spring; wherein the first housing is affixed to a face of the door frame, wherein the second housing is slidable relative to the first housing, so that when the deadbolt impacts the deadbolt cushioning structure the biasing structure compresses and the second housing slides relative to the first structure and moves toward the face of the door frame to which the first housing is affixed. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIGS. 1( a ) and 1( b )  are top cross sectional view of a cushioning structure, according to an example embodiment of this invention, as a door with an extended deadbolt is being closed toward a door frame. 
         FIG. 2( a )  is an exploded perspective view of the cushioning structure of  FIGS. 1( a )-( b ) . 
         FIG. 2( b )  is a perspective view of the cushioning structure of  FIGS. 1( a )-( b ) and 2( a ) . 
         FIG. 3  is an exploded perspective view of the cushioning structure of  FIGS. 1( a )-( b ) and 2( a )-( b ) , but taken from an inverted perspective compared to  FIG. 2( a ) . 
         FIGS. 4( a )-4( c )  are top views illustrating an example of how a strike plate may be used to help align/locate attachment screws for attaching the cushioning structure to a door frame. 
         FIG. 5( a )  is a perspective view of a cushioning structure according to another example embodiment of this invention. 
         FIG. 5( b )  is an exploded perspective view of the cushioning structure of  FIG. 5( a ) . 
         FIG. 5( c )  is an exploded cross-sectional view of the cushioning structure of  FIGS. 5( a )-( b ) . 
         FIG. 5( d )  is a cross-sectional view of the cushioning structure of  FIGS. 5( a )-( c ) . 
         FIG. 5( e )  is a top view of the spring supporting structure of the cushioning structure of  FIGS. 5( a )-( d ) . 
         FIGS. 6( a ) and 6( b )  are top cross sectional view of the cushioning structure of  FIGS. 5( a )-( e )  as a door with an extended deadbolt is being closed toward a door frame. 
         FIG. 7  is a top cross sectional view of a door frame. 
         FIG. 8( a )  is an exploded side cross sectional view of a cushioning structure according to another example embodiment of this invention, which may be used to cushion deadbolts as shown in  FIG. 1  or  FIG. 6 . 
         FIGS. 8( b ) and 8( c )  are cross sectional views of the cushioning structure of  FIG. 8( a ) , including foam inside the structure, as a deadbolt hits it and causes the foam to compress moving from the position of  FIG. 8( b )  to the position of  FIG. 8( c ) . 
         FIG. 8( d )  is an exploded perspective view of the cushioning structure of  FIGS. 8( a )-( c ) , absent the foam. 
         FIG. 8( e )  is a perspective view of the cushioning structure of  FIGS. 8( a )-( d ) , absent the foam. 
         FIGS. 9( a ) and 9( b )  are top cross sectional view of a cushioning structure, according to another example embodiment of this invention, as a door with a retractable latch is being closed toward a door frame. 
         FIGS. 9( c ) and 9( d )  are top cross sectional view of the cushioning structure of  FIGS. 9( a )-( b ) , illustrating that wedges/shims may be used to adjust the position/angle of the cushioning structure relative to a surface of the frame to which it is mounted. 
         FIG. 9( e )  is a perspective view of the cushioning structure of  FIGS. 9( a )-( d ) . 
         FIG. 9( f )  is a front plan view of the cushioning structure of  FIGS. 9( a )-( e ) . 
         FIG. 9( g )  is a side plan view of the cushioning structure of  FIGS. 9( a )-( f ) . 
         FIGS. 10( a ) and 10( b )  are top cross sectional view of a cushioning structure, according to another example embodiment of this invention, as a door with a retractable latch is being closed toward a door frame. 
         FIGS. 10( c ) and 10( d )  are top cross sectional view of the cushioning structure of  FIGS. 10( a )-( b ) , illustrating that wedges/shims/spacers may be used to adjust the position/angle of the cushioning structure relative to a surface of the frame to which it is mounted. 
         FIG. 10( e )  is an exploded side plan view of components of the cushioning structure of  FIGS. 10( a )-( d ) . 
         FIG. 10( f )  is a side plan view of components of the cushioning structure of  FIGS. 10( a )-( e ) . 
         FIGS. 10( g )-( h )  are side plan views of the cushioning structure of  FIGS. 10( a )-( f )  illustrating that a set screw(s) may be used to adjust an angle of the cushioning structure. 
         FIGS. 11( a )-( c )  are side plan views illustrating that set screws may be used to adjust the orientation angle of the cushioning structures of any of  FIGS. 1-10 . 
         FIGS. 12( a )-( b )  are perspective views illustrating where on a door frame the cushioning structures of any of  FIGS. 9-11  may be located for engagement with a retractable latch of the door. 
         FIGS. 13( a )-( b )  are top cross sectional views illustrating that set screws, adjustable via screw driver from an exposed surface of the structure, may be used to adjust the orientation angle of the cushioning structures of any of  FIGS. 1-12 . 
         FIGS. 14( a )-( b )  are perspective views illustrating that the deadbolt cushioning structure of any of  FIGS. 1-8  may be used on a door frame in combination with a latch cushioning structure of any of  FIGS. 9-13  in example embodiments of this invention. 
         FIG. 15( a )  is an exploded perspective view of a deadbolt cushioning structure  1  according to another example embodiment of this invention (similar to the  FIG. 1-3  embodiment). 
         FIG. 15( b )  is an exploded perspective view of the deadbolt cushioning structure of  FIGS. 15( a ) and 15( c )-( d ) , but taken from an inverted perspective compared to  FIG. 15( a ) . 
         FIG. 15( c )  is a perspective view of the assembled deadbolt cushioning structure of  FIGS. 15( a )-( b ) . 
         FIG. 15( d )  is a side cross-sectional view of the deadbolt cushioning structure of  FIGS. 15( a )-( c ) . 
         FIG. 16  is an exploded perspective view of at least part of a deadbolt cushioning structure according to any of the  FIG. 1-4 or 15 ( a )-( d ) embodiments. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Referring now more particularly to the accompanying drawings in which like reference numerals indicate like parts throughout the several views. Also, different embodiments described herein may, or may not, be used together with each other for a given door structure in various embodiments of this invention. 
       FIGS. 1( a ) and 1( b )  are top cross sectional view of a cushioning structure  1 , according to an example embodiment of this invention, as a door  2  with a fully extended deadbolt  3  is being closed toward a door frame  4 . The door frame  4  is provided for surrounding a door when a door is in a shut position. The door frame  4  may include, for example and without limitation, face  4   a , protruding soffit  6 , door stop  8 , and rabbet  9 . The door frame  4  may be metal, wood, or the like. The strike plate  12 , often made of metal, is mounted to the frame  4 , often on a rabbet  9  portion of the frame  4 . Strike plate  12  includes lip  12   a  (which may be curved or straight) and also includes opening  12   b  defined therein for receiving the deadbolt  3  and opening  12   c  defined therein for receiving the retractable latch  14 .  FIGS. 1( a )-( b )  illustrate that when the door  2  is being closed in the illustrated “door swing” direction toward the door frame  4  including toward stop  8 , the extended deadbolt  3  hits the cushioning structure  1  and the force with which the deadbolt  3  impacts the cushioning structure causes the cushioning structure to compact from the  FIG. 1( a )  position into the compressed  FIG. 1( b )  position thereby dampening/cushioning the impact of the deadbolt. This allows for the deadbolt  3  impact to create less noise and less damage compared to if the cushioning structure  1  was not present and the deadbolt  3  instead impacted the face  4   a  of the door frame  4 . 
       FIG. 2( a )  is an exploded perspective view of the telescoping cushioning structure  1  of  FIGS. 1( a )-( b ) , and  FIG. 2( b )  is a perspective view of the assembled cushioning structure of  FIGS. 1( a )-( b ) and 2( a ) . The deadbolt cushioning structure  1  includes impact plate insert  21 , top housing  22 , foam insert  23  including a base  23   a  and a protruding section  23   b  extending from the base, the foam insert  23  for compressing upon deadbolt impact and dampening/cushioning the impact, middle housing  24  for receiving part of all of the foam insert  23 , base housing  25  including holes  25   a  therein through which fasteners (e.g., screws) may extend in order to attached the cushioning structure  1  to the door frame  4 , and optional riser  26  which also has holes  26   a  defined therein through which fasteners (e.g., screws) may extend in order to attached the cushioning structure  1  to the door frame  4 . The insert  21  may be adhered to the top housing structure  22  using adhesive or the like. The top structure  22  and/or insert  21  may have a suitable durometer such as any of softness durometers  30 ,  40 ,  50 ,  60 ,  70  or  90 , and may be dual durometer in example embodiments. The assembled cushioning structure  1  is shown in  FIG. 2( b ) . And  FIG. 3  is an exploded perspective view of the cushioning structure of  FIGS. 1-2 , but taken from an inverted perspective compared to  FIG. 2( a ) . It can be seen in  FIGS. 2-3  that impact plate insert  21  fits in a small recess in top structure  22  and is plate-like in shape. The base portion  23   a  of the foam insert  23  is mostly or entirely housed in a cavity of top housing structure  22 , and the extending protruding section  23   b  of the foam insert is partially, mostly or entirely housed in the interior cavity  24   b  of middle housing  24 . One or more springs may be used instead of, or in addition to, the foam insert  23  in the housing cavities of this embodiment (e.g., see the springs in other figures herein). A distal end portion of the protruding section  23   b  of the foam insert  23  may be housed in the interior cavity of base housing  25  over the screws and screw holes  25   a . Male projections  26   b  extending from the base portion of riser  26  fit into female holes  25   b  in the bottom of base housing  25 , thereby allowing the base housing  25  to be attached to and mounted on the riser  26 . Female slots  25   c  at or proximate the exterior corners of housing  25  receive respective elongated male projections  24   a  extending from the interior corners of middle housing  24 , so that the base housing  25  at least partially slides into the interior cavity  24   b  of middle housing  24  in a retractable and sliding manner. The male/female interlocking parts allowing elements  23 - 26  to fit together in an interlocking manner, yet be able to slide in a telescoping manner upon deadbolt impact and foam  23  compression, has been found to be highly advantageous in that large amounts of undesirable wobble of the structure can be reduced and improved dampening can be provided. Lip projections/tabs  24   c  on the exterior of middle housing  24  snap-fit into respective detents  22   a  in the interior walls of top structure  22  so that the middle housing  24  is attached to the top structure  22  with the base portion  23   a  of the foam insert  23  being located mostly or entirely inside the cavity of top structure  22  and being supported by the external peripheral portion including projections  24   a  and walls  24   d  of middle housing  24 . Thus, the base portion  23   a  of the foam insert is located in the interior cavity  22   b  of top structure  22 , whereas the projection portion  23   b  of the foam insert is located mostly or entirely in the interior cavity  24   b  of middle housing  24 . Middle housing  24  and base housing  25  are slidingly attached to each other so that they can slide relative to each other when the deadbolt  3  impacts the structure  1  and the foam insert  23  compresses due to the deadbolt impact.  FIG. 1( a )  shows the cushioning structure  1  prior to deadbolt impact when the foam insert  23  is in its normal expanded position, and  FIG. 1( b )  shows the cushioning structure after deadbolt  3  impact when the foam insert  23  is in a compressed state and the middle housing  24  had slid down and over the exterior of base housing  25  toward the face  4   a  of frame  4 . The middle housing  24  may slide, in an interlocking manner, all the over the base housing  25  and contact the frame  4 , or may slide only part-way over (e.g., at least over half) the base housing  25  upon full or substantially full compression of the foam insert in different embodiments of this invention. Base housing  25  is stationary and rigidly affixed to the door frame  4  via screws, and housings  22  and  24  upon deadbolt  3  impact slide down and over the base housing  25  as shown in the figures. In certain embodiments, the amount that foam  23  can compress upon deadbolt impact is limited by one or more of: (a) the foam  23  reaching the bottom of base housing  25  ( b ) the projections  24   f  on the interior of housing  24  reaching and impacting riser  26 , and/or (c) the impacting of face  4   a  of the frame  4  by the middle housing  24  when it slides over base housing  25  toward the frame upon deadbolt impact. This is how the cushioning structure dampens/cushions the impact of the deadbolt  3  and reduces noise and/or damage due to the same. The telescoping design of the cushioning structure  1  shown in  FIGS. 1-3  allows for a longer distance between the expanded and compressed positions, thus allowing for a large amount of foam compression and thus dampening/cushioning of deadbolt impacts. It is noted that the housing parts may be formed of molded plastic or any other suitable material (e.g., polypropylene or ABS) in example embodiments of this invention. 
     Surprisingly, it has been found that several structures reduced wobble to a desirable level in the cushioning structure. In particular, it was found that providing four detents  22   a  on the respective four interior walls of the top housing  22 , for mating engagement with four respective tabs/projections  24   c  on the four exterior walls of housing  24 , advantageously reduced wobble of the structure  1  but allowed enough wobble near the top of the structure to account for normal tolerance variances. Additionally, it was found that the provision of the projections  26   b  on riser for mating engagement with holes  25   a  reduced wobble near the bottom of the cushioning structure in an advantageous manner. These wobble improvements represent significant improvements from a technical perspective, while allowing for a small amount of wobble near the top of the structure to account for tolerance variances. Additionally, the four detents  22   a  on the four inside walls of top housing  22  may allow for the top housing  22  to be removed if desired (e.g., to replace the foam insert, or to access the screws for removal of the structure from a door frame). 
     The  FIG. 15( a )-( d )  embodiment is the same as the  FIG. 1-3  embodiment, except for the design of metal insert  21 / 21 ′ and top housing  22 / 22 ′. Thus, all discussions herein regarding the  FIG. 1-3  embodiment also apply to the  FIG. 15( a )-( d )  embodiment, and vice versa.  FIG. 15( a )  is an exploded perspective view of a deadbolt cushioning structure  1  according to this embodiment;  FIG. 15( b )  is an exploded perspective view of the deadbolt cushioning structure  1  of  FIGS. 15( a ) and 15( c )-( d ) , but taken from an inverted perspective compared to  FIG. 15( a ) ;  FIG. 15( c )  is a perspective view of the assembled deadbolt cushioning structure  1  of  FIGS. 15( a )-( b ) ; and  FIG. 15( d )  is a side cross-sectional view of the deadbolt cushioning structure  1  of  FIGS. 15( a )-( c ) . In the  FIG. 1-3  embodiment, the metal insert plate  21  is flat and continuously provided across the upper surface of top housing  22 . However, in the  FIG. 15( a )-( d )  embodiment, the metal insert plate  21 ′ with an architectural finish has an aperture  21   a  defined therein that receives a projection  22   c  of the top housing  22 ′ that protrudes upwardly from the major upper surface  22   d  of the top housing  22 ′. As perhaps best shown in  FIG. 15( d ) , the projection  22   c  extending through aperture  21   a  provides for a raised surface of the cushioning structure  1  in an area where the deadbolt  3  is designed to hit the structure  1 . The raised surface of projection  22   c  may be a distance “d” (e.g., from about 0.05 to 0.40 inches) above the upper surface of metal insert  21 ′. The raised upper surface of the projection  22   c  may also be above the upper peripheral lip  22   e  of the housing  22  as shown in  FIG. 15( d ) , although in other example instances it may be even with or below the lip  22   e . It has been found that this raised generally flat area provided by projection  22   c  extending through aperture  21   a  may better receive impacts from the deadbolt  3  and reduces potential damages to the structure  1 . 
       FIG. 16  illustrates that the foam insert  23  in any of the  FIG. 1-4 or 15 ( a )-( d ) embodiments can be made in different ways in different example embodiments of this invention. First, it is possible for the foam insert  23  to be of one-piece construction so that the entire insert including portions  23   a  and  23   b  is made of one piece of foam. Second, as shown at  23 ′ in  FIG. 16 , a two-piece construction of the foam insert  23  is possible where the base portion  23   a  is plate-like in shape so as to be provided continuously or substantially continuously across substantially the entirety or across the entirety of the inside cavity of top housing  22 , and for protruding section  23   b  of the foam insert  23  to be located on and supported by the base portion  23   a . Third, as shown at  23 ″ in  FIG. 16 , a two-piece construction of the foam insert  23  is possible where the base portion  23   a  is donut yet plate-like in shape so as to have an aperture  90  defined in a central portion thereof, and for protruding section  23   b  of the foam insert  23  to be located in and extend partway or all the way through aperture  90 . 
     In certain example embodiments of this invention (see all embodiments in  FIG. 16 ; as well as all embodiments of  FIGS. 1-3 and 15 ), the base portion  23   a  of the foam insert is made of soft density foam and the protruding section  23   b  of the foam insert is made of medium density foam. Thus, the protruding section  23   b  of the foam insert is made of higher density foam than is the base portion  23   a . It has surprisingly been found that this allows for the structure  1  to realized improved shock absorbing characteristics and improved noise reduction upon deadbolt impacts. The soft density foam of the base portion  23   a  has more give and more compression upon deadbolt impact than does the medium density foam of the protruding section  23   b  of the foam insert. It has been found that having the soft density foam of base  23   a  compress first upon deadbolt impact, followed by compression of the higher density foam of section  23   b , results in improved noise dampening and better shock absorbing characteristics. Thus, this is a significant technical advantage associated with such embodiments. 
       FIGS. 4( a )-4( c )  are top views illustrating an example of how a strike plate may be used to help align/locate attachment screws for attaching the cushioning structure  1  of  FIGS. 1-3  (or any other embodiment herein) to a door frame  4 . Note that the strike plate illustrated in  FIG. 4( b )  does not have the apertures shown therein, for purposes of simplicity. The screw holes  25   a ,  26   a  in the cushioning structure  1  may be spaced apart the same distance as the screw holes in the strike plate  12 . The strike plate  12  is placed on the face  4   a  of the frame  4  so as to contact a strike plate  12  affixed to the frame  4 , and a user marks through the screw holes in the strike plate onto the face  4   a  where the screws for attaching the structure  1  are to be positioned (see  FIG. 4( a ) ). The strike plate  12  is then removed, and the cushioning structure  1  is placed on the face  4   a  of the frame  4  so that the screw holes  25   a ,  26   a  in the cushioning structure  1  are aligned with the marks on the face  4   a , and then screws are inserted through the holes  25   a ,  26   a  into the frame  4  to attach the structure  1  to the frame  4  (see  FIG. 4( c ) ). Thus, the strike plate may be used as a guide and for example a 1/32 inch clearance (width of the strike plate) may be used as clearance to prevent the depression of the structure  1  from hitting an attached strike plate  12  that is affixed to the frame.  FIG. 5( a )  is a perspective view of a cushioning structure  1 ′ according to another example embodiment of this invention, and  FIG. 5( b )  is an exploded perspective view of the cushioning structure of  FIG. 5( a ) . The cushioning structure  1 ′ may be used the same way as structure  1  discussed above. However, the structure  1 ′ of  FIGS. 5( a )-( b )  has only two housings  30 ,  31  instead of the three in the structure  1  discussed above. In the  FIG. 5  embodiment, cushioning springs  33  are provided inside the housings  30 ,  31  so that the housings  30 ,  31  can move relative to each other upon deadbolt impact. A lip(s)  34  on housing  31  engages detent(s)  35  of housing  30  so that housings  30  and  31  can be snap-fit to each other.  FIG. 5( c )  is an exploded cross-sectional view of the cushioning structure of  FIGS. 5( a )-( b ) , and  FIG. 5( d )  is a cross-sectional view of the cushioning structure of  FIGS. 5( a )-( c ) . Springs  33  are provided in respective cavities or channels  36  defined in housing and are aligned with and fit over projections  37  of housing  30  in order to hold the springs in place in the structure  1 ′. While six springs, and corresponding cavities/channels/recesses  36  are shown in  FIGS. 5( a )-( e ) , other numbers may instead be used. Tension of springs could vary to accommodate variances in door closing speeds and weight of doors. Screw holes could alternatively be used to attach the springs in place in the housings.  FIGS. 6( a ) and 6( b )  are top cross sectional view of the cushioning structure  1 ′ of  FIGS. 5( a )-( e )  as a door with an extended deadbolt  3  is being closed toward door frame  4 . Similar to the  FIG. 1-4  embodiment,  FIG. 5-6  illustrate that when the door  2  is being closed in the illustrated “door swing” direction toward the door frame  4  including toward stop  8 , the extended deadbolt  3  hits the cushioning structure  1 ′ and the force with which the deadbolt  3  impacts the cushioning structure  1 ′ causes the cushioning structure to compact due to compression of the springs  33  from the  FIG. 6( a )  position into the compressed  FIG. 6( b )  position thereby dampening/cushioning the impact of the deadbolt. This allows for the deadbolt  3  impact to create less noise and less damage compared to if the cushioning structure  1 ′ was not present and the deadbolt  3  instead impacted the face  4   a  of the door frame  4 . Like the  FIG. 1-4  embodiment, the  FIG. 5-6  embodiment is a telescoping structure so that when the springs  33  compress and/or depress the housings  30 ,  31  slide relative to one another as shown in the figures. Rubber cushion  38  may be provided on an extension portion of housing  30  and be adapted to hit the strike plate  12  upon spring compression to prevent damage to the cushioning structure  1 ′ and limit the compression of the structure  1 ′ (a similar cushion  38  may be used in the  FIG. 1-4  embodiment and/or the  FIG. 8  embodiment). Holes may be provided in the bottom of housing  31  to allow air to escape upon compression of the cushioning structure  1 ′ as the housing  30  slides down and over stationary housing  31 , and/or to allow screws to attach the structure  1 ′ to the frame  4 .  FIG. 7  is a top cross sectional view of a door frame  4 , provided for purposes of understanding as to door frame structure. As discussed above, a door frame  4  may include, for example and without limitation, face  4   a , protruding soffit  6 , door stop  8 , and rabbet  9 . The door frame  4  may be metal, wood, or the like, and may be hollow or solid in different instances.  FIG. 8( a )  is an exploded side cross sectional view of a cushioning structure  1 ″ according to another example embodiment of this invention, which may be used to cushion deadbolt  3  impacts as shown in  FIG. 1  or  FIG. 6 .  FIGS. 8( b ) and 8( c )  are cross sectional views of the cushioning structure  1 ″ of  FIG. 8( a ) , including foam  43  inside the structure. As a deadbolt  3  hits it, the impact causes the foam  43  (one, two or more pieces of foam) to compress and one housing to slide relative to the other so as to dampen the deadbolt strike moving from the position of  FIG. 8( b )  to the position of  FIG. 8( c ) .  FIG. 8( d )  is an exploded perspective view of the cushioning structure  1 ″ of  FIGS. 8( a )-( c ) , absent the foam, and  FIG. 8( e )  is a perspective view of the cushioning structure  1 ″ of  FIGS. 8( a )-( d ) , absent the foam  43 . Similar to the  FIG. 1-6  embodiments, when the door  2  is being closed in the “door swing” direction toward the door frame  4  including toward stop  8 , the extended deadbolt  3  hits the cushioning structure  1 ″ and the force with which the deadbolt  3  impacts the cushioning structure  1 ″ causes the cushioning structure  1 ″ to compact due to compression of the foam  43  thereby dampening/cushioning the impact of the deadbolt. This allows for the deadbolt  3  impact to create less noise and less damage compared to if the cushioning structure  1 ″ was not present and the deadbolt  3  instead impacted the face  4   a  of the door frame  4 . Like the  FIG. 1-6  embodiments, the  FIG. 8  embodiment is a telescoping structure so that when the foam  43  compresses/depresses the housings  40 ,  41  slide relative to one another as shown in the figures. Holes  44  may be provided in the bottom of housing  41  to allow air to escape upon compression of the cushioning structure  1 ′ as the housing  40  slides down and over stationary housing  41  and/or to allow screws to attach the structure  1 ″ to the frame  4 . Note also that riser  41 ′ may optionally be provided. If a top portion of the cushioning structure ( 1 ,  1 ′ and/or  1 ″) extends beyond the lip  12   a  of the strike plate  12  in example embodiments, when the deadbolt  3  of the closing door impacts the cushioning structure the compression will want to bottom out on the top of the strike plate  12 . In certain example embodiments of this invention (see cushioning structures  1 ,  1 ′ and  1 ″ above), the furthest down toward the frame  4  and frame face  4   a  the outermost face (the strike face) of the cushioning structure  1 ,  1 ′,  1 ″ can compress is still at a location above the upper lip  12   a  of the strike plate, in order to reduce possible damage (e.g., see  FIGS. 1( b ) and 6( b ) ). An interesting relationship is the top and base housings. A tight fit can cause air to compress. If the fit is tight, a relief hole(s) at the bottom may be provides to allow air to escape during spring and/or foam compression, as discussed above. Springs may compress independently, in combination, or be embedded between variations in the durometer of a foam pad, or a combination of some or all of these concepts. 
     Some may want to affix the base housing ( 25 ,  25 / 26 ,  31 ,  41 ) to the frame  4  with shallow head screws. Holes in the base housing (and optionally in an optional riser) can be provided for attachment to the frame, and/or a self-adhesive tape can be used to adhere the base housing to the frame. The screws could be thin head pan head and centered under the foam and/or conical or compression springs. It is desirable for the top of the part (e.g., housing portions  22 ,  24 ,  30 ,  40 ) to be removable so that an installer can directly fix the base housing to the face  4   a  of the door frame. 
     The latch of a lockset engages the strike plate on a frame just prior to latching. The latch may have a bevel so that it can more easily engage with the strike plate and allow easier closing and reducing friction. Most strike plates on a frame have a curved lip to allow the latch to begin recessing as it moves toward the hole in the strike plate on the frame. Not all bevels on latches are the same and not all angles on strike plates have the same angles or lip height. Some additional considerations that affect the normal ease of latching are variations in the angles in the setting of a frame, causing the frame to be twisted in or out and the gap between the door and frame can vary from tight to loose. This in turn can affect the angle at which the latch meets the straight or curved lip. The desired angulation of the latch and the lip of the strike plate by the manufacturer can be adversely affected by manufacturing and field installation tolerances and thus negatively impact the ease of latching. 
     Life safety codes and NFPA fire inspection criteria for building inspectors and fire marshals may state fire doors that should be self-closing and self-latching. Also, field modifications such as filing of a strike plate to relieve binding interference between a lock latch and the strike plate may be a code violation. For example, certain codes may state that from a seventy degrees (ADA) open position a door should not be faster than three seconds (NFPA 101) to move to with three inches from the latch, and (NFPA 80) not slower than ten seconds. In light of this, installers are prone to simply increase closing speeds to achieve a latched and/or locked condition. This adds to the increased noise. A method would be desirable to facilitate undesirable tolerance conditions that reduce the capability of a door to self-close and self-latch. In this respect, discussed below are latch cushioning structures (e.g.,  60 ,  63 ′) that allow the spring-biased latch  14  to easily retract prior to engaging the strike plate so that the latch has little or no interference from the initial impact of the latch hitting a strike plate, which in turn reduces or eliminates initial impact noise of a latch hitting a strike plate. Thus, the latch  14  can be completely or substantially completely withdrawn before impact with a strike plate. 
       FIGS. 9( a ) and 9( b )  are top cross sectional view of a cushioning structure  60 , according to another example embodiment of this invention, as a door  2  with a retractable spring biased latch  14  is being closed toward a door frame  4  and toward stop  8 .  FIGS. 9( c ) and 9( d )  are top cross sectional view of the cushioning structure  60  of  FIGS. 9( a )-( b ) , illustrating that optional wedges/shims  61  may be used to adjust the position/angle of the cushioning structure  60  relative to a surface  4   a  of the frame  4  to which it is mounted.  FIG. 9( e )  is a perspective view of the cushioning structure  60  of  FIGS. 9( a )-( d ) , and  FIG. 9( f )  is a front plan view of the cushioning structure  60  of  FIGS. 9( a )-( e ) .  FIG. 9( g )  is a side plan view of the cushioning structure  60  of  FIGS. 9( a )-( f ) . As shown in  FIG. 9 , a notch or indent is provided in the cushioning structure  60 , so that the engaging surface  63  is angled θ (e.g., from about 60 to 85 degrees, more preferably from about 65 to 80 degrees) relative to the face  4   a  of the frame on which the structure  60  is mounted, and so that the engaging surface  63  covers or substantially covers the lip  12   a  of the strike plate so that the latch hits the surface  63  instead of the distal end of the strike plate lip. This allows the latch to slide easily across surface  63  to reduce noise and/or potential damage to the frame and/or strike plate. When the door is closing, after the door and/or latch pass the surface  63 , the spring-biased latch  14  will end up extending into the hole  12   c  in the strike plate to maintain the door  2  in a closed position. 
       FIGS. 10( a ) and 10( b )  are top cross sectional view of a cushioning structure  63 ′, according to another example embodiment of this invention, as a door with a retractable latch is being closed toward a door frame. Cushioning structure  63 ′ may be used in a similar manner as shown in  FIG. 9  as discussed above.  FIGS. 10( c ) and 10( d )  are top cross sectional view of the cushioning structure  63 ′ of  FIGS. 10( a )-( b ) , illustrating that wedges/shims/spacers  61  may be used to adjust the position/angle of the cushioning structure  63 ′ and latch engaging surface  64  thereof, relative to a surface/face  4   a  of the frame to which it is mounted. Latch engaging surface  64  in  FIG. 10  is the same as the latch engaging surface  63  in  FIG. 9 , and the angle θ discussed above applies to both. Housings  65  and  67  are pivotally attached to each other via a pin in hole  68  that extends through both housings. A series of holes are then provided in the other side of both housings  65 ,  67 , and a pin, set screw  70  or the like can be used to fit through lined up such holes in both housings in order to affix the housings  65 ,  67  to each other and align the angle of latch engaging surface  64  as desired. Thus, the angle of surface  64  is adjustable in such a manner, depending upon the angles of the door frame  4 , strike plate, and latch assembly in a particular structure or system. As discussed herein, different locksets may have different angles of the latch  14  compared to others, so the adjustable feature is desirable so as to fit the cushioning structure  63 ′ to a variety of different locksets. A spacer or shim  61 , as shown in  FIGS. 10( c ) and 10( d )  may be used to adjust the height and/or angle of the engaging surface  64 , to accommodate different sized strike plates, frames, and/or latch assemblies. 
       FIGS. 11( a )-( c )  are side plan views illustrating that, instead of or in addition to shims and/or spacers, set screws  80  may be used to adjust the orientation angle of the cushioning structures of any of  FIGS. 1-10 . In this respect,  FIGS. 13( a )-( b )  are top cross sectional views illustrating that the set screws  80 , are adjustable via screw driver  81  from an exposed surface of the structure. 
       FIGS. 12( a )-( b )  are perspective views illustrating where on a door frame  4  the cushioning structures  60 ,  63 ′ of any of  FIGS. 9-11  may be located for engagement with a retractable latch of the door. 
       FIGS. 14( a )-( b )  are perspective views illustrating that the deadbolt cushioning structure  1 ,  1 ′,  1 ″ of any of  FIGS. 1-8  may be used on a door frame in combination with a latch cushioning structure  60 ,  63 ′ of any of  FIGS. 9-13  in example embodiments of this invention. Alternatively the deadbolt cushioning structure  1 ,  1 ′ or  1 ″ may be used without the latch cushioning structure  60 ,  63 , or vice versa, in certain example embodiments of this invention. 
     There are variations in manufacturing tolerances for how far out of the mortise in the door that the latch extends. The latch can be somewhat inside the mortise or it can be somewhat outside the mortise. This can result in the latch  14  protruding too far out of the door mortise which in turn can cause the non-beveled part of the latch to hit squarely on the strike plate  12 ,  12   a  and miss the start of the bevel on the latch. This can result in the door not latching and securing properly. The latch cushioning structures  60 ,  63 ′ discussed above address and resolve this problem. 
     Doors that have self-closing spring hinges or door closers are usually set by the installer to close faster, or harder, to overcome the resistances and the net effect is that the doors slam into a closed position. This can cause noticeable increased noise from the slamming of the doors on to the frames. Where the frames are hollow, the increase in noise is dramatic. This in turn creates noise complaints by guests in perhaps hotels. Again, the latch cushioning structures  60 ,  63 ′ discussed above address and resolve this problem. 
     Doors not closing easily and not latching easily can reduce the intended locking of the door to maintain security and safety for an occupant. To overcome all these problems it would be desirable to have a spring biased latch  14  begin to withdraw in to the door mortise before the latch meets the strike plate. Highly desirable would be for the latch to withdraw completely so that only the top of the latch meets the angle of the strike plate and then slides noiselessly and quietly in to the cavity of the strike plate. The latch cushioning structures  60 ,  63 ′ discussed above address these issues and are advantageous in these respects. 
     Because of the tolerance variations the latch cushioning structures  60 ,  63 ′ have an adjustable bevel to accommodate variances. A base and/or a top housing pivots to change the bevel or angle via changing the angle/orientation of the latch engaging surface. The base can be attached to the frame with screws or self-adhesive both. The pivot point can be a continuous dowel, a short pin or a male pip and a hole on the base or the other way around. Securing the angle could be by a set screw or a male pip (or several pips) engaging a series of females holes, as discussed above. These could be on the side or in the rear. A screw could positioned in the sides or the rear. 
     The front end of the latch engaging surface  63 ,  64  extends outward so that it can be position near or on top of the angle of the lip of the strike plate. The base may have snap on or a glued on elevator of varying heights to accommodate different heights of strike plate by different manufacturers. The elevators could be flat or on angles and this could affix to the base by snapping on, adhesives, or the like. 
     One could design a fixed latch assist that might accommodate some or a multitude of issues, but it would be desirable to be able to field adjust for variations by having one of more of the features incorporated in the proposed design. 
     While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.