US20150048730A1 - Durable drawer retainer apparatus and method of use - Google Patents
Durable drawer retainer apparatus and method of use Download PDFInfo
- Publication number
- US20150048730A1 US20150048730A1 US14/531,270 US201414531270A US2015048730A1 US 20150048730 A1 US20150048730 A1 US 20150048730A1 US 201414531270 A US201414531270 A US 201414531270A US 2015048730 A1 US2015048730 A1 US 2015048730A1
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- United States
- Prior art keywords
- drawer
- piston
- housing
- slide assembly
- drawer slide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- A47B88/08—
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B88/00—Drawers for tables, cabinets or like furniture; Guides for drawers
- A47B88/40—Sliding drawers; Slides or guides therefor
- A47B88/49—Sliding drawers; Slides or guides therefor with double extensible guides or parts
- A47B88/493—Sliding drawers; Slides or guides therefor with double extensible guides or parts with rollers, ball bearings, wheels, or the like
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B88/00—Drawers for tables, cabinets or like furniture; Guides for drawers
- A47B88/40—Sliding drawers; Slides or guides therefor
- A47B88/49—Sliding drawers; Slides or guides therefor with double extensible guides or parts
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- A47B2088/0474—
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B88/00—Drawers for tables, cabinets or like furniture; Guides for drawers
- A47B88/40—Sliding drawers; Slides or guides therefor
- A47B88/453—Actuated drawers
- A47B88/46—Actuated drawers operated by mechanically-stored energy, e.g. by springs
- A47B88/467—Actuated drawers operated by mechanically-stored energy, e.g. by springs self-closing
- A47B2088/4675—Actuated drawers operated by mechanically-stored energy, e.g. by springs self-closing with detent or emboss on slide
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B2210/00—General construction of drawers, guides and guide devices
- A47B2210/0002—Guide construction for drawers
- A47B2210/0018—Buffers, stop blocks or latches for single drawer slides
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B2210/00—General construction of drawers, guides and guide devices
- A47B2210/0002—Guide construction for drawers
- A47B2210/0064—Guide sequencing or synchronisation
- A47B2210/0081—Telescopic drawer rails with stop blocks, e.g. synchronization buffers
Definitions
- the present disclosure relates to sliding assemblies for mounting drawers in cabinetry.
- the disclosure relates to extension ball bearing slides with a durable, front mounted, adjustable drawer retainer mechanism which prohibits the inadvertent opening of a closed drawer.
- Drawer slides mounted to cabinets and drawers for slidably moving a drawer in a cabinet are well known in the art.
- Drawer slides are typically constructed of two or more rails which are telescopically extendable.
- the outer most rail is the widest and is mounted to the stationary cabinet wall and encloses the inner rails.
- the innermost rail is typically mounted on the side or underneath the drawer piece.
- the rails usually incorporate ball bearings mounted in retainers and seated in races formed in the sides of the rails so that the rails may slide with respect to each other.
- This low friction provided by the rails allows the drawer to move between the open and closed positions with minimal effort. As a result, drawers are often closed rapidly and with excess force and have a tendency to rebound when closed.
- the low friction provided by the rails allows unintentionally opening drawers during vehicle movement.
- U.S. Pat. No. 5,757,109 to Parvin discloses a telescopic drawer slide with a soft sequencing latch.
- the soft sequencing latch comprises a latch arm carried by a slide member.
- a spring arm extending from the latch arm in compressive contact with the slide member biasing the latch arm into engagement with a locking element on a second slide member and an actuator on a third slide member for disengaging the latch arm.
- the actuator disengages the latch arm by applying a force to the latch arm with a component oppositely directed and of sufficient magnitude to overcome the compressive spring force.
- Interaction of the locking element with the latching aim and the interaction of the actuator with the latching arm may both serve as frictional interfaces during slide operation.
- the device requires a component on each slide member and the latch arm is susceptible due to constant deformation and frictional forces. Further, the force applied by the soft sequencing latch is not adjustable.
- U.S. Pat. No. 6,244,678 to Dopp, et at. discloses drawer slide with front-mounted stop/anti-rebound mechanism.
- Two stop/anti-rebound pieces comprised of resilient arcuate segments are individually attached at the forward ends of a first rail and a second rail of the rail assembly.
- the stop/anti-rebound mechanism engages when the first and second rails are in a closed position and prevent the first and second rails from moving beyond a closed position.
- the force applied by the stop/anti-rebound mechanism is not adjustable.
- the stop/anti-rebound mechanism includes certain arcuate segments that are prone to failure due to repeated deformation.
- U.S. Pat. No. 6,435,636 to MacMillan discloses a cushion end stop detent member for a drawer slide having a set of cushioning arms, a detent projection, and a frictional ramp.
- the cushion and detent projection element is made from a resilient material and is attached to the inside of the outer rail of a three rail drawer assembly.
- the cushioning arms and the frictional ramp engage and cushion the movement of the middle rail.
- the detent projection cooperates with a receptor in the inner rail.
- the device is prone to wear and deteriorates over time due to friction and repeated deformation.
- the device is not adjustable.
- U.S. Patent to Radke. et al. discloses a drawer slide assembly having an adjustable integral strike and catch mechanism.
- An adjustable strike is included on a first slide member.
- a catch is included on a second slide member. The strike and catch engage when the drawer is closed.
- a strike fastener allows for adjustment of the strike position. The strike is deformable and so is prone to wear due to frictional forces and repeated deformation.
- the drawer retainer mechanism disclosed provides an inexpensive yet durable, front mounted device for securing a drawer which provides ease of installation and more durable components which increase the user life of the slide and reduce the frequency of required replacement.
- a preferred embodiment provides an extension ball bearing drawer slide assembly with stay closed mechanism.
- the preferred embodiment is an inexpensive alternative to prior art drawer slide assemblies which prolongs the usable life of the drawer slide assembly and the cabinet piece by providing a front mounted and adjustable stay closed drawer retainer mechanism.
- an embodiment of the apparatus includes a drawer slide assembly comprised of a fixed member, a middle member slidingly engaged with the fixed member via a set of linear bearings, a drawer member slidingly engaged with the middle member via a second set of linear bearings, and a drawer retainer mechanism attached to the drawer member.
- the fixed member is attached to the cabinet piece
- the drawer member is attached to the drawer piece of furniture.
- the drawer retainer mechanism is. comprised of a frame attached to the drawer member, a housing seated in the frame, a piston fitted in the housing and spaced from one interior surface of the housing by a helical spring. The helical spring is centered on a screw threaded into the frame.
- the piston biased by the helical spring, is urged upward by a raised indention in the race of the fixed member as the drawer is opened or closed. Once the piston passes the raised indention, the drawer retainer mechanism retains the drawer in a closed position and hence prevents the drawer member from opening without a sufficient force applied in the opening direction.
- An alternate preferred embodiment attaches the housing directly to the drawer member.
- a hole in the housing is threaded to receive a threaded plug to adjustably bias the piston against the raised indention.
- FIG. 1 is an isometric view of a preferred embodiment of a drawer slide assembly.
- FIG. 2 is an exploded isometric view of a preferred embodiment of a drawer slide assembly.
- FIG. 3 is an isometric view of a preferred embodiment of the housing and piston of the drawer retainer mechanism.
- FIG. 4 is a plan view from the underside of a preferred embodiment of the housing and piston of the drawer retainer mechanism.
- FIG. 5 is an elevation view of a preferred embodiment of the piston.
- FIG. 6 is a partial cross section view in a closed position of a preferred embodiment of a drawer slide assembly along line 6 - 6 of FIG. 1 .
- FIG. 7A is a cross section view of a preferred embodiment of a drawer slide assembly in an opened position.
- FIG. 7B is a cross section view of a preferred embodiment of a drawer slide assembly between an opened and closed position.
- FIG. 7C is a cross section view of a preferred embodiment of a drawer slide assembly in a closed position.
- FIG. 8 is a partial cross section view in a closed position of an alternate preferred embodiment of the drawer slide assembly.
- FIG. 9 is a partial cross section view in a closed position of an alternate preferred embodiment of the drawer slide assembly.
- drawer slide assembly 100 is comprised of fixed member 102 , middle member 104 , drawer member 106 , and drawer retainer mechanism 108 .
- Each member 102 , 104 , and 106 of drawer slide assembly 100 is generally C-shaped and includes a pair of races for housing ball-bearing assemblies.
- Fixed member 102 is mounted to the inside of the cabinet frame of a furniture piece having a drawer using common attachment hardware such as wood screws. Although three slides are shown, it is understood that a greater or lesser number of slides may be telescopic-ally engaged with one another.
- bumper 110 is attached to tab 112 .
- bumper 110 is formed of rubber or similar deformable yet resilient material and is frictionally held in place on tab 112 via a slot which tab 112 extends through.
- bumper 110 is formed of nylon or Teflon®.
- Middle member 104 is slidingly engaged with fixed member 102 via a series of ball bearings 120 held in bearing retainer 124 .
- Drawer member 106 is slidingly engaged with middle member 104 via a second series of ball bearings 122 held in a second bearing retainer 126 .
- Drawer member 106 is mounted to the side of the drawer frame of the cabinet piece using common attachment hardware such as wood screws through a plurality of mounting holes. From rear end 107 of drawer member 106 extend extensions 127 and 129 which define cavity 128 . Extensions 127 and 129 are slightly angled towards one another resulting in the distance between them being smaller than the height of drawer member 106 .
- drawer retainer mechanism 108 is attached to the front facing end of drawer member 106 opposite extensions 127 and 129 and cavity 128 . As this front mounted feature is preferred for easier maintenance and replacement, it should be understood that the desired effect of preventing the inadvertent opening of the drawer and the rebound of the closed drawer can be accomplished if drawer retainer mechanism 108 were to be mounted on rear end 107 of drawer member 106 .
- drawer retainer mechanism 108 is comprised of frame 130 mounted to the front facing end of drawer member 106 , housing 140 contained in frame 130 , and piston 142 seated within housing 140 .
- Frame 130 includes flanges 134 , 135 , 136 , 137 , and 138 which form a generally open-sided rectangular box.
- Flange 134 connects frame 130 to drawer member 106 via a weld or other connection means common in the art.
- Flange 135 opposes flange 134 .
- Flange 138 includes threaded hole 132 .
- Flange 138 opposes flanges 136 and 137 .
- Flanges 136 and 137 are separated by gap 141 .
- housing 140 is comprised of center support 171 , walls 173 and 175 , base support 177 , and guide wall 179 .
- the center support, walls, base support and guide wall form cavity 170 .
- Hole 154 passes through center support 171 into cavity 170 .
- Slot 158 is provided in base support 177 and is located opposite from and axially aligned with hole 154 .
- Slot 158 includes open end 160 .
- Open end 160 is less in width than slot 158 thereby creating a stepped recess and allowing movement of piston 142 within cavity 170 .
- Guide wall 179 includes guide ridges 190 and 192 .
- Guide ridges 190 and 192 are integrally formed raised ridges generally parallel to each other and parallel to the longitudinal axis of screw 144 .
- Housing 140 is preferably cast from plastic or similar lightweight yet durable material and is generally rectangular in shape.
- piston 142 comprises a combined rectangular body 167 and rounded protrusion 166 .
- Piston 142 further includes hole 156 having bottom 157 .
- Channels 162 and 164 flank hole 156 and are spaced to slidingly engage guide ridges 190 and 192 .
- Channels 162 and 164 contain lubrication to ensure unencumbered linear movement of piston 142 with respect to housing 140 .
- the axes of channels 162 and 164 are generally parallel with the axis of hole 156 .
- Piston 142 is preferably cast from plastic or similar lightweight yet durable material. In alternate embodiments, piston 142 is constructed of Delrin, nylon or Teflon®.
- Screw 144 includes threaded section 152 , spanner head 153 , and shaft 155 .
- Spanner head 153 is shaped to accept a torsional force from a spanner.
- Screw 144 attaches housing 140 to frame 130 as threaded section 152 engages threaded hole 132 , Screw 144 does not contact and is not connected to piston 142 .
- screw 144 , threaded hole 132 , hole 154 , and hole 156 are axially aligned.
- Spring 146 surrounds shaft 155 and is simultaneously constrained by shaft 155 , hole 154 and hole 156 .
- shaft 155 is not necessary as spring 146 is constrained by holes 154 and 156 .
- Spring 146 passes through hole 154 and is seated in hole 156 .
- Spring 146 provides a bias between frame 130 and bottom 157 thus forcing piston 142 out of housing 140 and extending protrusion 166 through slot 158 and through gap 141 .
- a pair of drawer slide assemblies 100 are typically mounted one on each side of a drawer and to opposing inside surfaces of a cabinet piece.
- drawer retainer mechanism 108 is not engaged with raised indention 114 and bumper 110 is not wedged between extensions 127 and 129 . As a result the drawer is tree to slide in direction 220 to a fully open position.
- a force applied in the closing direction shown by arrow 210 causes drawer member 106 and drawer retainer mechanism 108 to approach fixed member 102 .
- spring 146 is compressed between threaded section 152 and piston 142 , the bias of spring 146 tends to force piston 142 out of housing 140 thus extending protrusion 166 through slot 158 and between flanges 136 and 137 through gap 141 .
- Piston 142 is held within housing 140 by the result of the width of body 167 being wider than slot 158 .
- protrusion 166 contacts raised indention 114 , raised indention 114 forces protrusion 166 , against the bias of spring 146 , to move in a direction parallel to the longitudinal axis of screw 144 through gap 141 and slot 158 until protrusion 166 has retreated towards housing 140 enough to successfully bypass raised indention 114 .
- Guide ridges 190 and 192 engaged with channels 162 and 164 in cooperation with walls 173 and 175 prevent piston 142 from rotating or jamming within housing 140 dining engagement with raised indention 114 .
- extensions 127 and 129 engage bumper 110 .
- spring 146 forces protrusion 166 through slot 158 and gap 141 away from housing 140 until body 167 abuts housing 140 .
- the force required to open or close the drawer can be adjusted by adjusting the compression of the helical spring.
- the compression of spring 146 increases as threaded section 152 is advanced. As the compression of spring 146 increases, the force required to move protrusion 166 through slot 158 and gap 141 toward housing 140 also increases. Adjusting the position of threaded section 152 relative to piston 142 thus adjusts the force necessary to move protrusion 166 through slot 158 .
- Rotating screw 144 in a clockwise direction shortens the distance between threaded section 152 and piston 142 thus compressing spring 146 and thus requiring a greater force to open or close the drawer.
- Rotating screw 144 in a counter-clockwise direction lengthens the distance between threaded section 152 and piston 142 decompressing spring 146 and thus reducing the force necessary to open or close the drawer.
- a sufficient force is applied in the opening direction shown by arrow 220 .
- the opening force must overcome the frictional force between bumper 110 and extensions 127 and 129 .
- raised indention 114 forces protrusion 166 , against the bias of spring 146 , through slot 158 . Once protrusion 166 clears raised indention 114 , spring 146 forces protrusion 166 through slot 158 and gap 141 until body 167 abuts housing 140 and the drawer is free to slide to its fully opened position unencumbered.
- drawer retainer mechanism 108 works cooperatively with bumper 110 and extensions 127 and 129 to prevent the drawer from inadvertently opening without a sufficient force applied in the opening direction, as shown by direction arrow 220 .
- the combination of drawer retainer mechanism 108 and bumper 110 and extensions 127 and 129 further prevents the drawer from rebounding from the closed position.
- housing 140 is mounted on tab 194 and constrained on one side by flange 196 .
- Tab 194 extends from drawer slide 106 .
- Tab 194 is integrally formed with drawer slide 106 .
- Flange 196 is integrally formed with tab 194 .
- tab 196 is not present.
- Housing 140 is mounted on tab 194 using common attachment hardware such as welding, rivets, or machine screws or with a suitable epoxy adhesive.
- Plug 180 is threaded for engagement with threaded hole 182 and upon rotation advances or retreats through threaded hole 182 .
- Spring 146 is constrained by threaded hole 182 and hole 156 in piston 142 .
- Spring 146 is adjacent plug 180 and bottom 157 . Spring 146 biases piston 142 against raised indention 114 . Adjusting the position of plug 180 relative to piston 142 adjusts the compression of spring 146 and thus adjusts the bias of piston 142 against raised indention 114 .
- housing 140 is mounted on tab 194 and constrained by flange 196 .
- Flexible member 186 is wedged between center support 171 of housing 140 and piston 142 .
- Flexible member 186 is constructed of rubber or closed shell plastic shock absorbing foam or any resilient substance having compressive shock absorbing and rebounding features. Flexible member 186 biases piston 142 against raised indention 114 .
Abstract
Description
- This application is a continuation of application Ser. No. 13/200,571, filed Sep. 24, 2011. The patent application identified above is incorporated, here by reference in its entirety to provide continuity of disclosure.
- The present disclosure relates to sliding assemblies for mounting drawers in cabinetry. In particular, the disclosure relates to extension ball bearing slides with a durable, front mounted, adjustable drawer retainer mechanism which prohibits the inadvertent opening of a closed drawer.
- Drawer slides mounted to cabinets and drawers for slidably moving a drawer in a cabinet are well known in the art. Drawer slides are typically constructed of two or more rails which are telescopically extendable. In standard practice, the outer most rail is the widest and is mounted to the stationary cabinet wall and encloses the inner rails. The innermost rail is typically mounted on the side or underneath the drawer piece. The rails usually incorporate ball bearings mounted in retainers and seated in races formed in the sides of the rails so that the rails may slide with respect to each other. This low friction provided by the rails allows the drawer to move between the open and closed positions with minimal effort. As a result, drawers are often closed rapidly and with excess force and have a tendency to rebound when closed. In cabinetry installed in mobile homes, recreational vehicles, or boats, the low friction provided by the rails allows unintentionally opening drawers during vehicle movement.
- U.S. Pat. No. 5,757,109 to Parvin discloses a telescopic drawer slide with a soft sequencing latch. The soft sequencing latch comprises a latch arm carried by a slide member. A spring arm extending from the latch arm in compressive contact with the slide member biasing the latch arm into engagement with a locking element on a second slide member and an actuator on a third slide member for disengaging the latch arm. The actuator disengages the latch arm by applying a force to the latch arm with a component oppositely directed and of sufficient magnitude to overcome the compressive spring force. Interaction of the locking element with the latching aim and the interaction of the actuator with the latching arm may both serve as frictional interfaces during slide operation. The device requires a component on each slide member and the latch arm is susceptible due to constant deformation and frictional forces. Further, the force applied by the soft sequencing latch is not adjustable.
- U.S. Pat. No. 6,244,678 to Dopp, et at. discloses drawer slide with front-mounted stop/anti-rebound mechanism. Two stop/anti-rebound pieces comprised of resilient arcuate segments are individually attached at the forward ends of a first rail and a second rail of the rail assembly. The stop/anti-rebound mechanism engages when the first and second rails are in a closed position and prevent the first and second rails from moving beyond a closed position. The force applied by the stop/anti-rebound mechanism is not adjustable. The stop/anti-rebound mechanism includes certain arcuate segments that are prone to failure due to repeated deformation.
- U.S. Pat. No. 6,435,636 to MacMillan discloses a cushion end stop detent member for a drawer slide having a set of cushioning arms, a detent projection, and a frictional ramp. The cushion and detent projection element is made from a resilient material and is attached to the inside of the outer rail of a three rail drawer assembly. The cushioning arms and the frictional ramp engage and cushion the movement of the middle rail. The detent projection cooperates with a receptor in the inner rail. The device is prone to wear and deteriorates over time due to friction and repeated deformation. The device is not adjustable.
- U.S. Patent to Radke. et al. discloses a drawer slide assembly having an adjustable integral strike and catch mechanism. An adjustable strike is included on a first slide member. A catch is included on a second slide member. The strike and catch engage when the drawer is closed. A strike fastener allows for adjustment of the strike position. The strike is deformable and so is prone to wear due to frictional forces and repeated deformation.
- There is a need for a less expensive, less complicated, and easily installed alternative to prior art drawer slides which secure closure of drawers. The drawer retainer mechanism disclosed provides an inexpensive yet durable, front mounted device for securing a drawer which provides ease of installation and more durable components which increase the user life of the slide and reduce the frequency of required replacement.
- A preferred embodiment provides an extension ball bearing drawer slide assembly with stay closed mechanism. The preferred embodiment is an inexpensive alternative to prior art drawer slide assemblies which prolongs the usable life of the drawer slide assembly and the cabinet piece by providing a front mounted and adjustable stay closed drawer retainer mechanism.
- Accordingly, an embodiment of the apparatus includes a drawer slide assembly comprised of a fixed member, a middle member slidingly engaged with the fixed member via a set of linear bearings, a drawer member slidingly engaged with the middle member via a second set of linear bearings, and a drawer retainer mechanism attached to the drawer member. The fixed member is attached to the cabinet piece, and the drawer member is attached to the drawer piece of furniture. The drawer retainer mechanism is. comprised of a frame attached to the drawer member, a housing seated in the frame, a piston fitted in the housing and spaced from one interior surface of the housing by a helical spring. The helical spring is centered on a screw threaded into the frame. The piston, biased by the helical spring, is urged upward by a raised indention in the race of the fixed member as the drawer is opened or closed. Once the piston passes the raised indention, the drawer retainer mechanism retains the drawer in a closed position and hence prevents the drawer member from opening without a sufficient force applied in the opening direction.
- An alternate preferred embodiment attaches the housing directly to the drawer member. A hole in the housing is threaded to receive a threaded plug to adjustably bias the piston against the raised indention.
- Those skilled in the art will appreciate the above-mentioned features and advantages of the disclosure together with other important aspects upon reading the detailed description that follows in conjunction with the drawings provided.
- In the detailed description of the preferred embodiments presented below, reference is made to the accompanying drawings.
-
FIG. 1 is an isometric view of a preferred embodiment of a drawer slide assembly. -
FIG. 2 is an exploded isometric view of a preferred embodiment of a drawer slide assembly. -
FIG. 3 is an isometric view of a preferred embodiment of the housing and piston of the drawer retainer mechanism. -
FIG. 4 is a plan view from the underside of a preferred embodiment of the housing and piston of the drawer retainer mechanism. -
FIG. 5 is an elevation view of a preferred embodiment of the piston. -
FIG. 6 is a partial cross section view in a closed position of a preferred embodiment of a drawer slide assembly along line 6-6 ofFIG. 1 . -
FIG. 7A is a cross section view of a preferred embodiment of a drawer slide assembly in an opened position. -
FIG. 7B is a cross section view of a preferred embodiment of a drawer slide assembly between an opened and closed position. -
FIG. 7C is a cross section view of a preferred embodiment of a drawer slide assembly in a closed position. -
FIG. 8 is a partial cross section view in a closed position of an alternate preferred embodiment of the drawer slide assembly. -
FIG. 9 is a partial cross section view in a closed position of an alternate preferred embodiment of the drawer slide assembly. - In the descriptions that follow, like parts are marked throughout the specification and drawings with the same numerals, respectively. The drawing figures are not necessarily drawn to scale and certain figures may be shown in exaggerated or generalized form in the interest of clarity and conciseness.
- Referring to
FIGS. 1 and 2 ,drawer slide assembly 100 is comprised of fixedmember 102,middle member 104,drawer member 106, anddrawer retainer mechanism 108. Eachmember drawer slide assembly 100 is generally C-shaped and includes a pair of races for housing ball-bearing assemblies.Fixed member 102 is mounted to the inside of the cabinet frame of a furniture piece having a drawer using common attachment hardware such as wood screws. Although three slides are shown, it is understood that a greater or lesser number of slides may be telescopic-ally engaged with one another. - Proximate the front end of fixed
member 102 is raisedindention 114 located inrace 115 for engagement withdrawer retainer mechanism 108. Proximate the opposite end of fixedmember 102 extendstab 112.Bumper 110 is attached totab 112. In one embodiment,bumper 110 is formed of rubber or similar deformable yet resilient material and is frictionally held in place ontab 112 via a slot whichtab 112 extends through. In other embodiments,bumper 110 is formed of nylon or Teflon®. -
Middle member 104 is slidingly engaged with fixedmember 102 via a series ofball bearings 120 held in bearingretainer 124.Drawer member 106 is slidingly engaged withmiddle member 104 via a second series ofball bearings 122 held in asecond bearing retainer 126.Drawer member 106 is mounted to the side of the drawer frame of the cabinet piece using common attachment hardware such as wood screws through a plurality of mounting holes. Fromrear end 107 ofdrawer member 106 extendextensions cavity 128.Extensions drawer member 106. The distance betweenextensions drawer member 106 is frictionally heldadjacent bumper 110. In a preferred embodiment,drawer retainer mechanism 108 is attached to the front facing end ofdrawer member 106opposite extensions cavity 128. As this front mounted feature is preferred for easier maintenance and replacement, it should be understood that the desired effect of preventing the inadvertent opening of the drawer and the rebound of the closed drawer can be accomplished ifdrawer retainer mechanism 108 were to be mounted onrear end 107 ofdrawer member 106. - As seen best in
FIGS. 2 and 6 ,drawer retainer mechanism 108 is comprised offrame 130 mounted to the front facing end ofdrawer member 106,housing 140 contained inframe 130, andpiston 142 seated withinhousing 140.Frame 130 includesflanges Flange 134 connectsframe 130 todrawer member 106 via a weld or other connection means common in the art.Flange 135 opposesflange 134.Flange 138 includes threadedhole 132.Flange 138 opposesflanges Flanges gap 141. - As seen best in
FIGS. 2 , 3, and 4,housing 140 is comprised ofcenter support 171,walls base support 177, and guidewall 179. The center support, walls, base support and guidewall form cavity 170. Hole 154 passes throughcenter support 171 intocavity 170.Slot 158 is provided inbase support 177 and is located opposite from and axially aligned withhole 154.Slot 158 includesopen end 160.Open end 160 is less in width thanslot 158 thereby creating a stepped recess and allowing movement ofpiston 142 withincavity 170.Guide wall 179 includes guideridges Guide ridges screw 144.Housing 140 is preferably cast from plastic or similar lightweight yet durable material and is generally rectangular in shape. - As shown in
FIG. 5 ,piston 142 comprises a combinedrectangular body 167 androunded protrusion 166.Piston 142 further includeshole 156 havingbottom 157.Channels flank hole 156 and are spaced to slidingly engageguide ridges Channels piston 142 with respect tohousing 140. The axes ofchannels hole 156.Piston 142 is preferably cast from plastic or similar lightweight yet durable material. In alternate embodiments,piston 142 is constructed of Delrin, nylon or Teflon®. -
Screw 144 includes threadedsection 152,spanner head 153, andshaft 155.Spanner head 153 is shaped to accept a torsional force from a spanner.Screw 144 attacheshousing 140 to frame 130 as threadedsection 152 engages threadedhole 132,Screw 144 does not contact and is not connected topiston 142. When assembled,screw 144, threadedhole 132,hole 154, andhole 156 are axially aligned.Spring 146 surroundsshaft 155 and is simultaneously constrained byshaft 155,hole 154 andhole 156. In an alternate embodiment,shaft 155 is not necessary asspring 146 is constrained byholes Spring 146 passes throughhole 154 and is seated inhole 156.Spring 146 provides a bias betweenframe 130 and bottom 157 thus forcingpiston 142 out ofhousing 140 and extendingprotrusion 166 throughslot 158 and throughgap 141. - As shown in
FIGS. 7A , 7B and 7C, in use, a pair ofdrawer slide assemblies 100 are typically mounted one on each side of a drawer and to opposing inside surfaces of a cabinet piece. - In an “opened” position as shown in
FIG. 7A , the front end ofdrawer member 106 is extended beyond the front end of fixedmember 102.Drawer retainer mechanism 108 is not engaged with raisedindention 114 andbumper 110 is not wedged betweenextensions direction 220 to a fully open position. - Referring to
FIG. 7B , during a closing sequence, a force applied in the closing direction shown byarrow 210 causesdrawer member 106 anddrawer retainer mechanism 108 to approach fixedmember 102. Becausespring 146 is compressed between threadedsection 152 andpiston 142, the bias ofspring 146 tends to forcepiston 142 out ofhousing 140 thus extendingprotrusion 166 throughslot 158 and betweenflanges gap 141.Piston 142 is held withinhousing 140 by the result of the width ofbody 167 being wider thanslot 158. Onceprotrusion 166 contacts raisedindention 114, raisedindention 114 forces protrusion 166, against the bias ofspring 146, to move in a direction parallel to the longitudinal axis ofscrew 144 throughgap 141 andslot 158 untilprotrusion 166 has retreated towardshousing 140 enough to successfully bypass raisedindention 114.Guide ridges channels walls piston 142 from rotating or jamming withinhousing 140 dining engagement with raisedindention 114. Simultaneously, asprotrusion 166 clears raisedindention 114.extensions bumper 110. After passing raisedindention 114,spring 146 forces protrusion 166 throughslot 158 andgap 141 away fromhousing 140 untilbody 167 abutshousing 140. - The force required to open or close the drawer can be adjusted by adjusting the compression of the helical spring. The compression of
spring 146 increases as threadedsection 152 is advanced. As the compression ofspring 146 increases, the force required to moveprotrusion 166 throughslot 158 andgap 141 towardhousing 140 also increases. Adjusting the position of threadedsection 152 relative topiston 142 thus adjusts the force necessary to moveprotrusion 166 throughslot 158.Rotating screw 144 in a clockwise direction shortens the distance between threadedsection 152 andpiston 142 thus compressingspring 146 and thus requiring a greater force to open or close the drawer.Rotating screw 144 in a counter-clockwise direction lengthens the distance between threadedsection 152 andpiston 142decompressing spring 146 and thus reducing the force necessary to open or close the drawer. - During an opening sequence, a sufficient force is applied in the opening direction shown by
arrow 220. The opening force must overcome the frictional force betweenbumper 110 andextensions indention 114 forces protrusion 166, against the bias ofspring 146, throughslot 158. Onceprotrusion 166 clears raisedindention 114,spring 146 forces protrusion 166 throughslot 158 andgap 141 untilbody 167 abutshousing 140 and the drawer is free to slide to its fully opened position unencumbered. - In a “closed” position as shown in
FIG. 7C ,drawer retainer mechanism 108 works cooperatively withbumper 110 andextensions direction arrow 220. The combination ofdrawer retainer mechanism 108 andbumper 110 andextensions - In an alternate preferred embodiment shown in
FIG. 8 ,housing 140 is mounted ontab 194 and constrained on one side byflange 196.Tab 194 extends fromdrawer slide 106.Tab 194 is integrally formed withdrawer slide 106.Flange 196 is integrally formed withtab 194. In another alternative embodiment,tab 196 is not present.Housing 140 is mounted ontab 194 using common attachment hardware such as welding, rivets, or machine screws or with a suitable epoxy adhesive.Plug 180 is threaded for engagement with threadedhole 182 and upon rotation advances or retreats through threadedhole 182.Spring 146 is constrained by threadedhole 182 andhole 156 inpiston 142.Spring 146 isadjacent plug 180 andbottom 157.Spring 146biases piston 142 against raisedindention 114. Adjusting the position ofplug 180 relative topiston 142 adjusts the compression ofspring 146 and thus adjusts the bias ofpiston 142 against raisedindention 114. - In an alternate preferred embodiment shown in
FIG. 9 ,housing 140 is mounted ontab 194 and constrained byflange 196.Flexible member 186 is wedged betweencenter support 171 ofhousing 140 andpiston 142.Flexible member 186 is constructed of rubber or closed shell plastic shock absorbing foam or any resilient substance having compressive shock absorbing and rebounding features.Flexible member 186biases piston 142 against raisedindention 114. - It will be appreciated by those skilled in the art that changes could be made to the embodiments described above without departing from the broad inventive concept thereof It is understood, therefore, that this disclosure is not limited to the particular embodiments disclosed, but it is intended to cover modifications within the spirit and scope of the present disclosure as defined by the appended claims.
Claims (20)
Priority Applications (1)
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US14/531,270 US20150048730A1 (en) | 2011-09-24 | 2014-11-03 | Durable drawer retainer apparatus and method of use |
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US13/200,571 US8876230B2 (en) | 2011-09-24 | 2011-09-24 | Durable drawer retainer apparatus and method of use |
US14/531,270 US20150048730A1 (en) | 2011-09-24 | 2014-11-03 | Durable drawer retainer apparatus and method of use |
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US13/200,571 Continuation US8876230B2 (en) | 2011-09-24 | 2011-09-24 | Durable drawer retainer apparatus and method of use |
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US20150048730A1 true US20150048730A1 (en) | 2015-02-19 |
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US13/200,571 Active 2032-09-02 US8876230B2 (en) | 2011-09-24 | 2011-09-24 | Durable drawer retainer apparatus and method of use |
US14/531,270 Abandoned US20150048730A1 (en) | 2011-09-24 | 2014-11-03 | Durable drawer retainer apparatus and method of use |
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US13/200,571 Active 2032-09-02 US8876230B2 (en) | 2011-09-24 | 2011-09-24 | Durable drawer retainer apparatus and method of use |
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Also Published As
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US20130077900A1 (en) | 2013-03-28 |
US8876230B2 (en) | 2014-11-04 |
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