|Publication number||US3716284 A|
|Publication date||Feb 13, 1973|
|Filing date||May 17, 1971|
|Priority date||May 17, 1971|
|Publication number||US 3716284 A, US 3716284A, US-A-3716284, US3716284 A, US3716284A|
|Original Assignee||Vogt J|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (5), Referenced by (50), Classifications (8)|
|External Links: USPTO, USPTO Assignment, Espacenet|
United States Patent 1191 Vogt 51 Feb. 13, 1973 [541 VERTICALLY-ADJUSTABLE DRAWER 2,686,704 8/1954 Wolters ..312/350 x SUSPENSION 1,569,158 1/1926 Tobey..... 312/350 X 2,620,251 12/1952 Restivo.... 312/350 X 1 Inventofl James g 7811 Consveration 3,572,874 3/1971 Hassel 1.312050 x Drive, Ada, Mich. 49801 Primary Examiner-James T. McCall  Filed May 1971 Att0rneyG1enn B. Morse  App1.No.: 144,090
 ABSTRACT  U.S. C1. ..312/339, 312/335, 312/350, A rack suspension for drawers and trays, the com- 312/351, 308/3,6 ponents being positioned vertically by apertured 51 1111.01. ..A47b 88/10 mounting Strips installed at the four vertical corners of  Field of Search 30/350, 335, 338 339, 351 a cabinet space, together with brackets engageable at 312/340; 308/36; 211/133, 134, 15] selected apertures in these strips. The rear brackets are engageable and disengageable in a direction other  References Cited than tangential with respect to the front mounting strips, so that engagement of the front brackets locks UNITED STATES PATENTS the entire assembly in position.
3,399,784 9/1968 Buchbinder et a1. ..211/151 7 Claims, 20 Drawing Figures SHEET 1 BF 3 PATENTEU FEB 1 a ma INVENTOR James B. Vogi BY 3 k ATTORNEY PAIENIE FEmaim v3-,7}l6,284 I SHEET 2 OF 3 IIVVENTOR Fly. [3 Fla [4 James B. Vogt By %W 5 1w;
A TTOR/VE Y PATENTEDFEBI 31915 3; 7 1 6.284
SHEET 30F 3 WI] b I, b 2E72 l/VVE/VTOR James B. Vogt A TTOR/VEY VERTlCALLY-ADJUSTABLE DRAWER SUSPENSION BACKGROUND OF THE INVENTION Present trends in design of drawer cabinets are in the direction of replacement of the conventional drawers by drawers or movable trays that can be placed at selected levels according to convenience. This arrangement, of course, eliminates the usual cabinet structure with built-in frontal drawer openings in favor of a hinged or slideable door across the front of a cabinet space within which a vertical array of adjustable drawers is mounted. This design trend is notably present in such structures as kitchen cabinets, where cost is a very significant factor to be considered.
Vertical adjustability of shelves is a standard feature obtainable in book shelving by the use of apertured mounting strips installed vertically at the four corners of the shelves. Standard brackets are available with hooked tongues capable of slight downward movement after engagement with the apertures to lock the brackets against lateral withdrawal. It should also be noted that the design of drawer suspensions based upon telescoping rails provided with interengaged rollers is also a wellestablished art. It is the purpose of this invention to combine the feature of vertical adjustability with the track-type drawer suspension, using a structure that can be installed in low-to-moderate cost cabinets with a minimum of difficulty. The primary problem exists at the rear of the cabinet space, where the engagement of conventional vertically-adjustable shelving brackets would require the services of a contortionist. The features of the present invention make possible an installation feature that can be performed entirely from the front of the cabinet structure, through the usual opening through which the drawers extend and retract.
SUMMARY OF THE INVENTION The present invention utilizes standard shelving mounting strips, preferably of the type which are generally U-shaped in cross-sectional configuration, with regularly-spaced elongated apertures along the central face of the channel. This channel configuration provides a space within the mounting strip for receiving the end of a tongue associated with the brackets that support the drawer-suspension tracks or rails. In the usual arrangement, screw holes are provided in the mounting strips in addition to the apertures, so that the installation of the strips in the cabinet structure can be accomplished merely through the application of standard wood screws.
The rear supporting brackets are preferably assembled to the drawer-suspension track rails, so that the rail may be used as a tool in the engagement of the rear bracket with the mounting strip. The placement of the mounting strip, and the-angular configuration of the bracket tongue, are selected to. provide a direction of engagement with the mounting strip which is other than tangential with respect to the mounting strip on the same side of the drawer adjacent the frontal opening. This is another way of saying that the rear bracket is not free vto swing out of engagement with the rear mounting strip, utilizing the front mounting engagement as a pivot on a vertical axis. To provide a degree of depth of adjustability it is preferable that either the front or the rear bracket be given at least a limited slideable engagement with respect to the rail, so that the engagement of the rear bracket can be followed by sliding displacement of the rail with respect to the bracket to a degree exactly appropriate for the engagement of the front bracket tongues, which have a hooked configuration similar to standard shelf supports. Where this slideable adjustability is provided, the direction of engagement and disengagement of the rear bracket tongues with the rear mounting strips should also be other than radial with respect to the front mounting strip, so that the freedom of sliding movement of the bracket along the rail cannot result in a slip-out of the rear tongues in a direction toward the front mounting strip after installation has been completed.
It is preferable that the angular position of the rear bracket tongues be such that they are engageable with the installed rear mounting strip only when the bracket is in a position established by shifting the front of the rail toward the center plane of the cabinet space from its finally installed position. This angular displacement is also preferably established in a degree such that the return of the rail to the front-rear position after engagement of the rear bracket tongues will establish a wedging or clamping action of the tongues within the mounting strip apertures which, though small in intensity, will effectively remove any looseness or clattering sound as the drawer is extended and retracted. It should also be noted that the rear bracket tongues should substantially fully occupy the apertures in the rear mounting strip vertically, so that the shifting of the center of gravity of the drawer as the drawer is extended will not move the rear bracket tongues vertically to cause a tipping action of the drawer, and create a feeling of looseness associated with low-quality structure.
Since this type of drawer installation can easily do away withthe conventional front drawer flange that functions as a stop to the inward movement of the drawer, a stop system built into the drawer suspension is incorporated in a structure embodying the preferred form of the present invention. A very inexpensive arrangement for providing this feature involves the use of a flange turned up from the material of the otherwise conventional drawer suspension rail, in a position for interengagement with one of the roller guides at the front of the installation. The flange is preferably surrounded by a resilient member that requires some degree of distortion to slip it into engagement with the flange.
DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a typical kitchen cabinet structure, showing a group of vertically-adjustable drawer trays in the retracted position, with the door covering the frontal opening of the cabinet swung open.
FIG. 2 is a perspective view of the kitchen cabinet shown in FIG. 1, with the drawer trays removed to expose the normally fixed suspension rails or tracks.
FIG. 3 is a side view on an enlarged scale over that of FIGS. 1 and 2, showing one of the normally fixed suspension rails in engagement with the front and rear mounting strips.
FIG. 4 is a sectional view of the left wall of the cabinet, as shown in FIG. 1, showing the installation of the structure illustrated in FIG. 3.
FIG. 5 is a view showing an intermediate position in the installation of the normally fixed rail, with the rail swung laterally so that the front end is displaced toward the center of the cabinet space.
FIG. 6 is a fragmentary view on an enlarged scale over that of FIG. 3, showing the front section of the normally fixed rail assembly.
FIG. 7 is a view similar to FIG. 6, but showing the rear section of the normally fixed rail, and the bracket associated with it.
FIG. 8 is a top view in projection with FIG. 6.
FIG. 9 is a top view in projection with FIG. 7.
FIG. 10 is a view of the outside of the rear portion of the normally fixed rail, including the adjustable rear bracket.
FIG. 11 is a view of the outside of the from section of the normally fixed rail, showing the front bracket.
FIG. 12 is a front end view, with respect to FIG. 1 1.
FIG. 13 is similar to FIG. 10, but shows a different relative position of the rear bracket and the fixed rail, to illustrate the adjustability.
FIG. 14 is a rear end view with respect to FIGS. 10 and 13.
FIG. 15 is a top view of a drawer tray, with the tray secured to the movable suspension rails, the left side of the view corresponding to the front of the cabinet.
FIG. 16 is a side elevation of the drawer tray shown on FIG. 15, and its associated movable support rail.
FIG. 17 illustrates the complete suspension assembly at the side of the drawer tray, disengaged from the cabinet mounting strips.
FIG. 18 is a top view of the stop abutment associated with the outer end of the movable support rail.
FIG. 19 is a side elevationwith respect to FIG. 18.
FIG. 20 is a section in plan at the frontal portion of the cabinet, showing the functioning of the abutments of FIGS. 18 and 19 as a protective device for a resilient engagement with a cabinet door with a drawer extended somewhat from the fully-retracted position.
DESCRIPTION OF THE PREFERRED EMBODIMENT The cabinet structure shown on FIGS. 1 and 2 has a top 30, sides 31 and 32, and a bottom 33. These paneltype components define a front opening 34 normally covered by a door 35 hinged to the cabinet structure at the front of the side 31. A vertical array of drawer trays 36-41 is mounted within the cabinet on four apertured mounting strips, each positioned at a point adjacent the four vertical corners of the space within the cabinet. Each of the drawer trays has a suspension system separately engageable with these mounting strips, so that the vertical position of the drawer trays can be selected according to convenience, and subsequently altered when it becomes desirable to do so.
The components of the suspension mechanism at the opposite sides of each of the drawers is the same, except for a right-left relationship. Referring to FIGS. 3 and 4, the normally fixed rail 42 is channel-shaped in configuration, havingthe upper and lower flanges 43 and 44, respectively, facing inwardly toward the center plane of the space within the cabinet covered by the door 35. The rear bracket 45 supports that portion of the normally fixed rail 42 through engagement with the apertured mounting strip 46, which is normally secured to the cabinet structure by conventional wood screws. The front bracket assembly 47 similarly engages the front mounting strip 48 installed at the side of the front opening of the cabinet structure. In the particular cabinet structure illustrated in the drawings, an optional rear panel 49 is used to define the rear of the cabinet space, but some conventional cabinet structures will utilize an existing wall for this purpose. The lower front portion of the cabinet is frequently off-set as shown at 50 for broom clearance, but this arrangement has no relationship with the present invention.
The rear mounting strip 46 is U-shaped in configuration, commonly referred to as a channel. The central portion of this channel has regularly-spaced apertures as shown at 51 in FIG. 3. The rear bracket 45 is provided with the tongues 52 and 53 which are spaced to engage an adjacent pair of the apertures 51, and dimensioned to slip easily into these apertures, but substantially fill them vertically. Load is transferred from the fixed rail 42 over to the supporting strips through the tongues 52 and 53, as a result of the embracement of the rail 42 by the flanges 54 and 55 of the bracket 45. The flanges are preferably held in engagement with the bracket by the rivet 56, which traverses the slot 57 in the bracket to provide a degree of limited freedom of movement of the bracket with respect to the rail to provide a telescoping adjustability.
The tongues 52 and 53 are preferably inclined with respect to the rail 42, as shown in FIGS. 4 and 5. This angular relationship is selected to render the tongues 52 and 53 engageable with the apertures 51 with the bracket in an angular position corresponding to that shown in FIG. 5. The engagement of the tongues 52 and 53 can be established by placing the rail in this angular position, followed by an appropriate movement in a front-rear direction such that the tongues 52 and S3 engage the apertures 51. Following this engagement, the angular swinging of the rail 42 in a clockwise direction, as shown in FIG. 5, will result in establishing a position in which the tongues 52 and 53 cannot be withdrawn from the apertures. The incline is also preferably selected such that the swinging of the rail 42 from the FIG. 5 to the FIG. 4 position will establish a degree of wedging, or clamping, action with respect to the rear mounting strip 46.
After the engagement of the tongues 52 and 53 have been completed, and the rail 42 swung toward the FIG. 4 position, the offset, or hook-shaped, tongues 58 and 59 of the front bracket structure are engaged with the front mounting strip 48. The tongues 58 and 59 have a vertical dimension such that they will just be admitted to the apertures 60, which are preferably of the same size and shape as that of the apertures 51 (so that the mounting strips are interchangeable), with the width dimension (as viewed in FIG. 12) established such that the tongues can enter into the mounting strips far enough to permit a downward movement to hook the tongues into position and prevent lateral disengagement. The final downward movement to the limit permitted by the offset of the tongues 58 and 59 is established such that the fixed rail is in approximately horizontal position. When the unit is installed to this point, it is completely locked against any lateral displacement in any direction.
The front bracket structure preferably includes not only the portion 60 containing the tongues 58 and 59, but also the roller mount 61. This portion of the bracket structure has a flange 62 preferably spotwelded to the flange 43 of the rail 42, and the portion 60 of this bracket structure is preferably spot-welded both to the rail 42 and to the roller-supporting portion 0 61. A stub shaft 63 is secured to the portion 61 of the bracket, and carries the roller 64.
A moveable rail 65 is normally secured to the drawer indicated at 66 by screws indicated at 67-70. This rail is also channel-shaped in configuration, and dimensioned to receive the roller 64. The moving rail on one side of the drawer structure is preferably provided with a retaining flange as shown at 71 which retains the associated roller 64. This arrangement is standard construction, and forms nopart of the present invention. The discontinuity in the upper flange of the rail 65, indicated at 72, is also conventional, and is provided as a stop limiting the outward movement of the drawer. Removal of the drawer is accomplished by an upward tilt of the outer portion of the drawer, so that the associated roller 64 can move over the abutment 72, as a result of the clearance offset 73 in the lower flange of the rail 65. This arrangement is also conventional. A standard bracket 74 is preferably spot-welded to the lower flange of the rail 65, and supports the stub shaft 75 carrying the roller 76, which is normally carried between the flanges 43 and 44 of the fixed rails 42.
The retracting movement of the door is limited by the presence of an abutment assembly, which includes the front flange 77 on the rail 65, with the flange 77 being surrounded by the resilient rubber-like bumper 78. This structure is positioned to intersect the roller 64 on closure of a drawer. It has the additional effect shown in FIG. 20,,as the door 35 can close against this cushion member, if a drawer is inadvertently left partially extended. The member 78 is preferably a short section of initially round tubular material necessarily distorted to slip over the flange 77. This arrangement can be improved in its effect by permitting the rear side of the member 78 to bow out to the rear, and this increase its cushioning ability.
1. In combination with a cabinet structure, a vertically adjustable suspension system for drawers and trays including apertured mounting strips formed to define a space within said mounting strip at least on installation thereof, and secured in vertical positions adjacent the front and rear of a cabinet structure, on opposite sides of space extending to the rear of a front opening in said structure, said system also including opposite and normally fixed side rails each provided with front and rear brackets engageable respectively with the apertured strips on one side of said front opening, and a moveable supporting rail adjacent each of said normally fixed rails, said fixed rails each having guide means at the outer portion thereof normally interengaged with the adjacent moveable rail, and said moveable rail having guide means at the inner portion thereof normally interengaged with the adjacent fixed rail, wherein the improvement comprises:
tongue means on the said rear brackets, said tongue means having a relationship with respect to said rear mounting strips selected to render said tongue means engageable and disengageable with apertures in said rear mounting strips in a selected substantially horizontal direction other than tangential with respect to the axis of said front mounting strips, and
tongue means on the said brackets adjacent the front of said fixed rails, said latter tongue means having an offset configuration selected to render said latter tongue means engageable with apertures in said front mounting strips and moveable downwardly after engagement to cause said offset configuration to lock said brackets against lateral withdrawal from said mounting strips, the engagement of said latter tongue means (with said brackets assembled to said normally fixed rails) preventing disengagement of said tongue means on said rear brackets, said rear mounting strips having side-opening apertures, and said rear bracket tongue means being engagable therewith exclusively in a first position angularly displaced about a vertical axis from the second position corresponding to the installed position of the fixed rail associated therewith determined by the engagement of said tongue means adjacent the front of said fixed rail.
2. A system as defined in claim 1, wherein said first position corresponds to rotation of said rear brackets from said first position toward the center plane of said space extending to the rear from said front opening, and about the axis of said rear mounting strips, respectively.
3. A system as defined in claim 2, wherein said rear bracket tongue means is inclined with respect to the fixed rail associated therewith to a degree to establish a wedging action as said rear bracket tongue means is inserted in said mounting strip aperture, and said normally fixed rail is placed in operating position, said rear bracket being angularly fixed with respect to said normally fixed rail associated therewith.
4. A system as defined in claim 1, wherein at least one of said brackets are slideably mounted on said normally fixed rail.
5. A system as defined in claim 4, wherein said selected direction is, additionally, other than radial with respect to the axis of said front mounting strips.
6. In combination with a cabinet structure, a vertically adjustable suspension system for drawers and trays'including apertured mounting strips formed to define a space within said mounting strip at least on installation thereof, and secured in vertical positions adjacent the front and rear of a cabinet structure on opposite sides of a space extending to the rear of a front opening in said structure, said system also including opposite and normally fixed side rails each provided with front and rear brackets engageable respectively with the apertured strips on one side of said front opening, and a moveable supporting rail adjacent each of said normally fixed rails, said fixed rails each having guide means at the outer portion thereof normally interengaged with the adjacent moveable rail, and said moveable rail having guide means at the inner portion thereof normally interengaged with the adjacent fixed rail, wherein the improvement comprises: abutment supporting rails, and also includes a resilient tubular cushioning member surrounding said flange, and normally having the vertically central portion thereof spaced from said flange.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US1569158 *||Jul 19, 1923||Jan 12, 1926||Tobey Fred W||Filing cabinet|
|US2620251 *||Dec 22, 1950||Dec 2, 1952||Lab Furniture Company Inc||Industrial cabinet|
|US2686704 *||Apr 1, 1949||Aug 17, 1954||Remington Rand Inc||Vertical correspondence file|
|US3399784 *||Aug 1, 1966||Sep 3, 1968||Ardco Inc||Shelving units with rolling shelves|
|US3572874 *||Oct 20, 1969||Mar 30, 1971||Schaefer Gmbh Fritz||Metal cabinets|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3926491 *||Apr 17, 1974||Dec 16, 1975||Philip A Greer||Knock-down drawer assembly|
|US4147393 *||Dec 16, 1977||Apr 3, 1979||Knape & Vogt Manufacturing Co.||Drawer slide mount employing a slide element and cooperative clip|
|US4181376 *||Jun 28, 1978||Jan 1, 1980||Tah Sun Lin||Rolling type door or window guide|
|US4199200 *||Aug 29, 1978||Apr 22, 1980||Amerock Corporation||Roller bracket assembly for drawers|
|US4440455 *||Jun 3, 1982||Apr 3, 1984||Westinghouse Electric Corp.||Drawer glide mount|
|US4566743 *||Jun 11, 1984||Jan 28, 1986||Kimball International, Inc.||Drawer slide clip|
|US4632473 *||Oct 24, 1983||Dec 30, 1986||R. C. Smith Company||Cabinet assembly|
|US4742429 *||Dec 16, 1986||May 3, 1988||Arrendiell Robert W||Bathroom electrical appliance caddy|
|US5211461 *||Apr 10, 1992||May 18, 1993||Artromick International, Inc.||Vertically adjustable extension drawers|
|US5421647 *||Jan 10, 1994||Jun 6, 1995||The Pull-Out Shelf Company, Inc.||Sliding drawer apparatus and method|
|US5470143 *||Mar 24, 1994||Nov 28, 1995||Steelcase Inc.||Self-locking snap-on suspension unit for furniture cabinets and the like|
|US5470144 *||Jan 21, 1994||Nov 28, 1995||Wen; Cheng-Kan||Drawer with a rail structure compatible with a single rail or multi-rail assembly in a cabinet|
|US5472270 *||Jul 5, 1994||Dec 5, 1995||Midmark Corporation||Convertible cabinet|
|US5496105 *||Jul 14, 1994||Mar 5, 1996||Midmark Corporation||Cabinet having drawers with cover flanges|
|US5667287 *||Apr 21, 1995||Sep 16, 1997||Gunning; John D.||Multi-media storage system having a multi-component insert assembly|
|US5761786 *||Nov 1, 1994||Jun 9, 1998||Venwest Business Acquisition Fund Limited Partnership||Method of retrofitting a sliding drawer within an existing cabinet|
|US5775786 *||Feb 5, 1997||Jul 7, 1998||Haworth, Inc.||Drawer slide|
|US5890784 *||Jun 24, 1997||Apr 6, 1999||Alfit Aktiengesellschaft||Drawer slide|
|US5957558 *||Jul 23, 1997||Sep 28, 1999||Quade; Robert C.||Combination drawer/shelf storage unit|
|US6027193 *||Feb 26, 1999||Feb 22, 2000||Grass America, Inc.||Two-part undermount drawer guide assembly with pivot member|
|US6129432 *||Aug 19, 1997||Oct 10, 2000||Baby's Dream Furniture, Inc.||Multiple chest of drawers having invertible capabilities|
|US6481812||Sep 19, 2000||Nov 19, 2002||Grass America, Inc.||Undermount drawer guide assembly|
|US6877831 *||Dec 23, 2002||Apr 12, 2005||Haworth, Inc.||Housing for free-standing file cabinet|
|US6962397||Oct 20, 2003||Nov 8, 2005||Hewlett-Packard Development Company, L.P.||Expandable slide and rail assembly for a rack|
|US6976745||Sep 19, 2001||Dec 20, 2005||Hewlett-Packard Development Company, L.P.||Snap-on slide and rail assembly|
|US6988626 *||Jul 31, 1998||Jan 24, 2006||Varghese Paily T||Computer component rack mounting arrangement|
|US7012808||Dec 20, 2002||Mar 14, 2006||Hewlett-Packard Development Company, L.P.||Multi-configurable telecommunications rack mounting system and method incorporating same|
|US7137512||Feb 19, 2003||Nov 21, 2006||Hewlett-Packard Development Company, L.P.||Removable rails for use on racks|
|US7218526||Mar 24, 2005||May 15, 2007||Hewlett-Packard Development Company, L.P.||Multi-configurable telecommunications rack mounting system and method incorporating same|
|US7275797||Sep 5, 2003||Oct 2, 2007||Haworth, Inc.||Lateral file|
|US7748803 *||Jul 6, 2010||Bradford Company||Horizontal dispensing container having multiple removable, sliding, hinged shelves|
|US8083298 *||Mar 26, 2009||Dec 27, 2011||Dell Products L.P.||Rail kit with universal mounting connection brackets|
|US8820314||Sep 23, 2010||Sep 2, 2014||Nashville Wire Products Mfg. Co.||Extendible oven rack apparatus|
|US9161620 *||Feb 21, 2013||Oct 20, 2015||Cambro Manufacturing Company||Mobile serving cart with adjustable hinges|
|US20030052580 *||Sep 19, 2001||Mar 20, 2003||Dobler Karl J.||Snap-on slide and rail assembly and method of assembling same|
|US20040041500 *||Aug 30, 2002||Mar 4, 2004||Richards-Wilcox, Inc.||Rotary filing cabinet with wardrobe|
|US20040119385 *||Sep 5, 2003||Jun 24, 2004||Dave Timmermann||Lateral file|
|US20040119389 *||Dec 23, 2002||Jun 24, 2004||Timmerman David H.||Housing for free-standing file cabinet|
|US20040120123 *||Dec 20, 2002||Jun 24, 2004||Mayer David W.||Multi-configurable telecommunications rack mounting system and method incorporating same|
|US20040159618 *||Feb 19, 2003||Aug 19, 2004||Nguyen Minh H.||Removable rails for use on racks|
|US20040217073 *||May 1, 2003||Nov 4, 2004||Dobler Karl J.||System and method for utilizing a tool-less rail in a rack|
|US20050127802 *||Dec 15, 2003||Jun 16, 2005||Henry Chen||Sectional cabinet|
|US20050162053 *||Jan 26, 2004||Jul 28, 2005||Larsen Joseph Jr.||Drawer guide rail assembly with releaseably secured bumpers|
|US20050162838 *||Mar 24, 2005||Jul 28, 2005||Mayer David W.||Multi-configurable telecommunications rack mounting system and method incorporating same|
|US20050168115 *||Feb 4, 2004||Aug 4, 2005||Brian Moon||Drawer cabinet storage kit|
|US20050184630 *||Jan 18, 2005||Aug 25, 2005||Bonanno Ronald J.||Quick assembly adjustable shelf and drawer system|
|US20080078729 *||Mar 13, 2007||Apr 3, 2008||Bradford Company||Horizontal Dispensing Container Having Multiple Removable, Sliding, Hinged Shelves|
|US20080116776 *||Jan 28, 2008||May 22, 2008||Ronald J. Bonanno||Quick Assembly Adjustable Shelf and Drawer System|
|US20100243586 *||Sep 30, 2010||Dell Products L.P.||Rail Kit with Universal Mounting Connection Brackets|
|US20130270988 *||Feb 21, 2013||Oct 17, 2013||Cambro Manufacturing Company||Mobile Serving Cart with Adjustable Hinges|
|U.S. Classification||312/334.4, 312/351, 312/334.19, 312/350, 384/22|