US20050168029A1 - Apparatus for adjusting inclination of chair backs - Google Patents
Apparatus for adjusting inclination of chair backs Download PDFInfo
- Publication number
- US20050168029A1 US20050168029A1 US10/768,592 US76859204A US2005168029A1 US 20050168029 A1 US20050168029 A1 US 20050168029A1 US 76859204 A US76859204 A US 76859204A US 2005168029 A1 US2005168029 A1 US 2005168029A1
- Authority
- US
- United States
- Prior art keywords
- positioning plate
- control rod
- disposed
- base
- resilient
- 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.)
- Granted
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Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C1/00—Chairs adapted for special purposes
- A47C1/02—Reclining or easy chairs
- A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
- A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
- A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C1/00—Chairs adapted for special purposes
- A47C1/02—Reclining or easy chairs
- A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
- A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
- A47C1/03205—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination
- A47C1/03238—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination by means of peg-and-notch or pawl-and-ratchet mechanism
Definitions
- the present invention relates to an apparatus for adjusting an inclination of chair backs, more particularly to an apparatus comprising a control rod disposed on the base of a chair with a rotary end, a contractible fixing plate being slidably embedded into or withdrawn from a latch opening disposed at any position on the rear side of the chassis fixed on the bottom of a seat cushion for adjusting the inclination of a chair back.
- the R.O.C. Patent No. 496133 disclosed an apparatus for controlling the inclination of a chair back, comprising: an air pressure rod disposed at the upper end of a chair leg and having an end passing through a base; a chassis with a cushion disposed on the base; the fixed base and chassis being pivotally coupled together; a plurality of latch grooves extended downward from the rear side of the chassis; a guide base disposed on the base and having a groove for accommodating a positioning plate; a sliding base slidably disposed on the top surface of the guide base; a linear long hole and an aslant long hole respectively disposed at the top surface of the guide base and sliding base; and a screw passing through the long holes and mounting the guide base and sliding base onto the positioning plate in the groove.
- An ear section of a reciprocating rod passes through one side of the sliding base, and a spring is disposed on each side of the reciprocating rod, such that both external sides of the spring are blocked by a blocking member at the end of the reciprocating rod, and one end of the reciprocating rod is fixed onto a control rod for controlling the inclination of the chair back. Therefore, when the control rod is pushed to drive the sliding base to move, and the control rod is further pushed by a resilient prestressing force of the spring and the aslant long hole such that the positioning plate is extended into or withdrawn from the groove to embed or withdraw the positioning plate respectively into or from the latch groove disposed at the end of the chassis for adjusting the inclination of the chair back.
- the force of the spring driving the sliding base to move is perpendicularly to the moving direction of the positioning plate, and drives the position plate to move the long hole to an aslant position.
- the force for moving the positioning plate is only half of the force for the spring to move the sliding base. Further, the force for moving the positioning plate will be reduced drastically by the friction between the sliding base and the guide base and the friction between the positioning plate and the groove.
- the positioning plate will be stuck into the groove easily.
- the resilience of the spring can be increased to strengthen the force to push the positioning plate, it also requires users to apply a larger force to push the control rod. Therefore, a larger force is needed for the operation. Since the direction of applying force to operate the control rod and the direction of the reaction of the spring have the same axial direction, which will make the operation of the control rod unsmooth and uneasy, particularly when a larger force is needed to operate the control rod.
- the present invention adopts a power-saving lever structure to control the control rod and achieve the purpose of an easy operation and greatly enhance the force to move the positioning plate.
- the present invention also designs the direction for applying a force by the spring to push the positioning plate in the same direction as the moving direction of the positioning plate, such that the pushing force applied to the positioning plate by the spring can be acted completely onto the positioning plate without any loss, and thus making the movement of the positioning plate smoother.
- the technical measures adopted to achieve the foregoing objectives include a base pivotally coupled to a middle predetermined position of the control rod, and a resilient component having two resilient legs, such that one of the resilient legs is hung at an end of the control rod, and the other resilient leg is hooked onto the positioning plate slidably disposed on the base, and the direction of pushing the resilient leg is vertical to the moving direction of the positioning plate. Therefore, when the control rod is pushed to swing its end and drives the resilient to rotate, one of the resilient legs pushes or pulls the positioning plate, and further moves the positioning plate to embed into or withdraw from a latch groove disposed at any position at the bottom rear side of the chassis.
- FIG. 1 is a perspective view of the disassembled parts of the structure according to the present invention.
- FIG. 2 is a top view of the apparatus for adjusting the inclination of a chair back according to the present invention.
- FIG. 3 is a cross-sectional view of a side of the apparatus for adjusting the inclination of a chair back according to the present invention.
- FIG. 4 is a partial view of the latch member according to the present invention.
- FIG. 5 is a view of the fixing plate being withdrawn from the latch groove according to the present invention.
- FIG. 6 is a view of the movements of adjusting the inclination of a chair back according to the present invention.
- the apparatus for adjusting the inclination of a chair back comprises a base 1 disposed at the upper end of a chair leg, a chassis 2 disposed at the bottom of a cushion of a chair, such that the base 1 and the chassis 2 are pivotally coupled together in the middle, and the rear end of the base 1 is pivotally coupled to a through hole 42 at the front end 41 of a swing frame 4 .
- a through hole 43 disposed on both sidewalls of the swing frame 4 is pivotally coupled to a link arm 23 extended from both sides at the rear side of the chassis 2 , and a positioning member 21 is fixed to the middle section of the bottom at the rear side of the chassis 2 , and a plurality of latch grooves 22 is disposed on the positioning member 21 .
- an end of a control rod 3 is extended out from the base 1 , such that a middle predetermined position 31 of the control rod 3 is pivotally coupled to a fixed base 11 , and the fixed base 11 is mounted onto the base 1 .
- the middle of the control rod 3 passes through the latch member 7 (as shown in FIG. 4 ) fixed in the base 1 .
- An accommodating groove 71 is disposed on the latch member 7 for accommodating the rod body 35 of the control rod 3 , and a blocking protrusion 72 disposed at the middle of the accommodating groove 71 and having a size smaller than the rod body 35 of the control rod 3 .
- a hollow space is disposed in the accommodating groove to define a resilient section 73 in the middle, such that the blocking protrusion 72 can have a better elastic latch action to provide a smooth movement and positioning between both ends of the accommodating groove 71 of the rod body 35 .
- control rod 3 continues to extend to define an end section 32 having a through hole; a sliding groove 10 is disposed in the middle at the rear end of the base 1 ; and a sliding positioning plate 5 is disposed in the sliding groove 10 .
- a cover 12 having a long hole 13 at its top surface covers the positioning plate 5 and allows the positioning plate 5 to move back and forth, and lets the front end of the positioning plate to be extended out into any latch groove 22 at the rear side of the chassis 2 .
- the positioning plate 5 has a rod body 51 at its top surface, so that the rod body 51 passes through the long hole 13 of the cover 12 , and then a resilient member 8 is pivotally coupled onto the cover 12 for a free rotation.
- the resilient member 8 has two resilient legs 81 , 82 , wherein one of the resilient legs 81 is hooked into the through hole at the end section 32 of the control rod 3 , and the resilient leg 82 at the other end is hooked into the rod body 51 .
- the positioning plate 5 originally embedded and clamped by the latch groove 22 produces a loosened gap to let the positioning plate 5 to be withdrawn from the latch groove 22 by a push produced by the prestressing force of the resilient leg 82 .
- the control rod 3 is pushed in the opposite direction such that the end section 32 swings back to the original vertical position. Then, the resilient leg 82 will produce a prestressing force to push the rod body 51 to the right.
- the control rod 3 being pushed by swinging with a power-saving lever structure can greatly increase the force to push the positioning plate 5 , and the user can save power for the operation and thus making the operation easier. Since the direction of applying force of the resilient leg 82 of the resilient component 8 for pushing the positioning plate 5 is in the same direction as the positioning plate 5 shifts, therefore the pushing force by the resilient leg 82 is acted completely onto the positioning plate 5 without any loss. As a result, the positioning plate 5 is pushed with a larger force, and shifts in a smoother manner.
Landscapes
- Health & Medical Sciences (AREA)
- Dentistry (AREA)
- General Health & Medical Sciences (AREA)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
Abstract
An apparatus for adjusting the inclination of a chair back, is disposed on the chassis at the bottom of a cushion and pivotally coupled to the middle of a base at the upper end of chair legs. A control rod has its middle predetermined position pivotally coupled to the base. A positioning plate has a bolt at its top surface and is disposed at the rear end of the base. A resilient component is pivotally coupled such that one end of the resilient component is hooked into an end of the control rod, and the other end of the resilient component being hooked into the bolt at the top surface of the positioning plate. When the control rod is turned to swing its end, the resilient component rotates, so that one of the resilient legs of the resilient component produces an elastic push onto the positioning plate. Thus the positioning plate contracts and moves to embed into or withdrawal from a latch groove disposed at the bottom rear side of the chassis. Therefore, the pushing force of a spring can be acted completely on the positioning plate and the positioning plate can move smoother, making operation easier and simpler.
Description
- The present invention relates to an apparatus for adjusting an inclination of chair backs, more particularly to an apparatus comprising a control rod disposed on the base of a chair with a rotary end, a contractible fixing plate being slidably embedded into or withdrawn from a latch opening disposed at any position on the rear side of the chassis fixed on the bottom of a seat cushion for adjusting the inclination of a chair back.
- The R.O.C. Patent No. 496133 disclosed an apparatus for controlling the inclination of a chair back, comprising: an air pressure rod disposed at the upper end of a chair leg and having an end passing through a base; a chassis with a cushion disposed on the base; the fixed base and chassis being pivotally coupled together; a plurality of latch grooves extended downward from the rear side of the chassis; a guide base disposed on the base and having a groove for accommodating a positioning plate; a sliding base slidably disposed on the top surface of the guide base; a linear long hole and an aslant long hole respectively disposed at the top surface of the guide base and sliding base; and a screw passing through the long holes and mounting the guide base and sliding base onto the positioning plate in the groove.
- An ear section of a reciprocating rod passes through one side of the sliding base, and a spring is disposed on each side of the reciprocating rod, such that both external sides of the spring are blocked by a blocking member at the end of the reciprocating rod, and one end of the reciprocating rod is fixed onto a control rod for controlling the inclination of the chair back. Therefore, when the control rod is pushed to drive the sliding base to move, and the control rod is further pushed by a resilient prestressing force of the spring and the aslant long hole such that the positioning plate is extended into or withdrawn from the groove to embed or withdraw the positioning plate respectively into or from the latch groove disposed at the end of the chassis for adjusting the inclination of the chair back.
- However, the force of the spring driving the sliding base to move is perpendicularly to the moving direction of the positioning plate, and drives the position plate to move the long hole to an aslant position. As a result, the force for moving the positioning plate is only half of the force for the spring to move the sliding base. Further, the force for moving the positioning plate will be reduced drastically by the friction between the sliding base and the guide base and the friction between the positioning plate and the groove.
- Thus, the positioning plate will be stuck into the groove easily. Although the resilience of the spring can be increased to strengthen the force to push the positioning plate, it also requires users to apply a larger force to push the control rod. Therefore, a larger force is needed for the operation. Since the direction of applying force to operate the control rod and the direction of the reaction of the spring have the same axial direction, which will make the operation of the control rod unsmooth and uneasy, particularly when a larger force is needed to operate the control rod.
- Making the movements of the positioning plate smoother and the operation easier and simpler for users is exactly the objective of this invention. Therefore, the present invention adopts a power-saving lever structure to control the control rod and achieve the purpose of an easy operation and greatly enhance the force to move the positioning plate.
- The present invention also designs the direction for applying a force by the spring to push the positioning plate in the same direction as the moving direction of the positioning plate, such that the pushing force applied to the positioning plate by the spring can be acted completely onto the positioning plate without any loss, and thus making the movement of the positioning plate smoother.
- The technical measures adopted to achieve the foregoing objectives include a base pivotally coupled to a middle predetermined position of the control rod, and a resilient component having two resilient legs, such that one of the resilient legs is hung at an end of the control rod, and the other resilient leg is hooked onto the positioning plate slidably disposed on the base, and the direction of pushing the resilient leg is vertical to the moving direction of the positioning plate. Therefore, when the control rod is pushed to swing its end and drives the resilient to rotate, one of the resilient legs pushes or pulls the positioning plate, and further moves the positioning plate to embed into or withdraw from a latch groove disposed at any position at the bottom rear side of the chassis.
-
FIG. 1 is a perspective view of the disassembled parts of the structure according to the present invention. -
FIG. 2 is a top view of the apparatus for adjusting the inclination of a chair back according to the present invention. -
FIG. 3 is a cross-sectional view of a side of the apparatus for adjusting the inclination of a chair back according to the present invention. -
FIG. 4 is a partial view of the latch member according to the present invention. -
FIG. 5 is a view of the fixing plate being withdrawn from the latch groove according to the present invention. -
FIG. 6 is a view of the movements of adjusting the inclination of a chair back according to the present invention. - The detailed description and technical characteristics of the present invention are described together with the drawings as follows.
- Please refer to
FIGS. 1, 2 , and 3 for the present invention. The apparatus for adjusting the inclination of a chair back comprises abase 1 disposed at the upper end of a chair leg, achassis 2 disposed at the bottom of a cushion of a chair, such that thebase 1 and thechassis 2 are pivotally coupled together in the middle, and the rear end of thebase 1 is pivotally coupled to a throughhole 42 at thefront end 41 of aswing frame 4. A throughhole 43 disposed on both sidewalls of theswing frame 4 is pivotally coupled to alink arm 23 extended from both sides at the rear side of thechassis 2, and apositioning member 21 is fixed to the middle section of the bottom at the rear side of thechassis 2, and a plurality oflatch grooves 22 is disposed on thepositioning member 21. - Further, an end of a
control rod 3 is extended out from thebase 1, such that a middlepredetermined position 31 of thecontrol rod 3 is pivotally coupled to afixed base 11, and thefixed base 11 is mounted onto thebase 1. The middle of thecontrol rod 3 passes through the latch member 7 (as shown inFIG. 4 ) fixed in thebase 1. Anaccommodating groove 71 is disposed on thelatch member 7 for accommodating therod body 35 of thecontrol rod 3, and ablocking protrusion 72 disposed at the middle of theaccommodating groove 71 and having a size smaller than therod body 35 of thecontrol rod 3. A hollow space is disposed in the accommodating groove to define aresilient section 73 in the middle, such that the blockingprotrusion 72 can have a better elastic latch action to provide a smooth movement and positioning between both ends of theaccommodating groove 71 of therod body 35. - Further, the
control rod 3 continues to extend to define anend section 32 having a through hole; asliding groove 10 is disposed in the middle at the rear end of thebase 1; and a slidingpositioning plate 5 is disposed in thesliding groove 10. Then, acover 12 having along hole 13 at its top surface covers thepositioning plate 5 and allows thepositioning plate 5 to move back and forth, and lets the front end of the positioning plate to be extended out into anylatch groove 22 at the rear side of thechassis 2. In the meantime, thepositioning plate 5 has arod body 51 at its top surface, so that therod body 51 passes through thelong hole 13 of thecover 12, and then a resilient member 8 is pivotally coupled onto thecover 12 for a free rotation. The resilient member 8 has tworesilient legs resilient legs 81 is hooked into the through hole at theend section 32 of thecontrol rod 3, and theresilient leg 82 at the other end is hooked into therod body 51. - Please refer to
FIGS. 5 and 6 . When the external end of thecontrol rod 3 is pushed, therod body 35 at the middle section will be embedded from one end of theaccommodating groove 71 of thelatch member 7 to the other, and further elastically blocks therod body 35 by the middle of the blockingprotrusion 72 for the positioning. In the meantime, theend section 32 of thecontrol rod 3 will swing to force theresilient leg 81 to extend outward, such that the resilient member 8 produces a rotary prestressing force, and theresilient leg 82 at the other end produces a prestressing force to shift thepositioning plate 5 to the left. Therefore, when the chair back is pressed and released by the reciprocating actions, thepositioning plate 5 originally embedded and clamped by thelatch groove 22 produces a loosened gap to let thepositioning plate 5 to be withdrawn from thelatch groove 22 by a push produced by the prestressing force of theresilient leg 82. After the chair back is adjusted to the user's desired inclination, thecontrol rod 3 is pushed in the opposite direction such that theend section 32 swings back to the original vertical position. Then, theresilient leg 82 will produce a prestressing force to push therod body 51 to the right. When the chair back is swung to a predetermined inclination and thepositioning plate 5 is aligned with the desiredlatching groove 22, the front end of the chair back will snap into thelatch groove 22 and latch the chair back. - Therefore, the
control rod 3 being pushed by swinging with a power-saving lever structure can greatly increase the force to push thepositioning plate 5, and the user can save power for the operation and thus making the operation easier. Since the direction of applying force of theresilient leg 82 of the resilient component 8 for pushing thepositioning plate 5 is in the same direction as thepositioning plate 5 shifts, therefore the pushing force by theresilient leg 82 is acted completely onto thepositioning plate 5 without any loss. As a result, thepositioning plate 5 is pushed with a larger force, and shifts in a smoother manner. - While the invention has been described by way of example and in terms of a preferred embodiment, it is to be understood that the invention is not limited thereto. To the contrary, it is intended to cover various modifications and similar arrangements and procedures, and the scope of the appended claims therefore should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements and procedures.
Claims (2)
1. An apparatus for adjusting inclination of chair backs, comprising:
a base pivotally coupled to a middle of a chassis;
a plurality of latch grooves disposed at a bottom at a rear side of said chassis;
a positioning plate disposed at a top surface at a rear end of said base for being slid back and forth, with an extended front end of said positioning plate being extended into one of the said latch grooves;
a control rod having a middle predetermined position pivotally coupled to said base with an end section of said control rod being swung; and
a rod body disposed on said positioning plate and pivotally coupled to a free rotary resilient component having first and second resilient legs, with the first resilient leg being coupled to an end of said control rod, and the second resilient leg being hooked into a bolt disposed on said positioning plate; thereby
when said control rod being pushed to seeing said end section back and forth produces a rotary prestressing force by said resilient component to move the position plate to selectively embed into and withdraw from one of said latch grooves disposed at the rear side of said chassis.
2. The apparatus for adjusting inclination of chair backs of claim 1 , wherein said base disposed at a middle of said control rod comprises a latch member having an accommodating groove thereon for letting a rod body of said control rod to pass through, and a middle of said accommodating groove is slightly smaller than a resilient blocking protrusion on the rod body of said control rod.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/768,592 US6921134B1 (en) | 2004-01-30 | 2004-01-30 | Apparatus for adjusting inclination of chair backs |
CNU2004200013003U CN2680112Y (en) | 2004-01-30 | 2004-02-10 | Chair backrest elevation adjustable device |
GB0414129A GB2415365A (en) | 2004-01-30 | 2004-06-24 | Apparatus for adjusting the inclination of a chair back |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/768,592 US6921134B1 (en) | 2004-01-30 | 2004-01-30 | Apparatus for adjusting inclination of chair backs |
CNU2004200013003U CN2680112Y (en) | 2004-01-30 | 2004-02-10 | Chair backrest elevation adjustable device |
GB0414129A GB2415365A (en) | 2004-01-30 | 2004-06-24 | Apparatus for adjusting the inclination of a chair back |
Publications (2)
Publication Number | Publication Date |
---|---|
US6921134B1 US6921134B1 (en) | 2005-07-26 |
US20050168029A1 true US20050168029A1 (en) | 2005-08-04 |
Family
ID=44070759
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/768,592 Expired - Lifetime US6921134B1 (en) | 2004-01-30 | 2004-01-30 | Apparatus for adjusting inclination of chair backs |
Country Status (3)
Country | Link |
---|---|
US (1) | US6921134B1 (en) |
CN (1) | CN2680112Y (en) |
GB (1) | GB2415365A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103169283A (en) * | 2013-03-19 | 2013-06-26 | 浙江恒林椅业股份有限公司 | Tray structure of reclining chair |
US20190343287A1 (en) * | 2018-05-11 | 2019-11-14 | Hangzhou Zhongtai Industrial Group Co., Ltd. | Slider-crank mechanism adjustment type swivel chair tray |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7293832B2 (en) * | 2005-08-19 | 2007-11-13 | Chien-Kai Huang | Chair adjustable device |
US7766426B2 (en) * | 2006-08-29 | 2010-08-03 | Ram Machines (1990) Ltd. | Tilt controls for chairs |
ITMI20070719A1 (en) * | 2007-04-06 | 2008-10-07 | L & P Property Management Co | TILTING DEVICE FOR A RECLINING SEAT. |
ITMI20070718A1 (en) * | 2007-04-06 | 2008-10-07 | L & P Property Management Co | ADJUSTMENT DEVICE FOR ADJUSTABLE AND SIMILAR CHAIRS. |
US20100127544A1 (en) * | 2008-11-25 | 2010-05-27 | Future Mobility Healthcare Inc. | Lockable reclining adjustment device to control the tilting of the seat frame of a manual wheelchair |
WO2012000139A1 (en) * | 2010-07-02 | 2012-01-05 | Chen Qiankui | Chair chassis with adjusting leaning force |
TW201204292A (en) * | 2010-07-30 | 2012-02-01 | guo-xiong Lin | Office chair with hidden switch |
CN102356967B (en) * | 2011-09-20 | 2013-09-18 | 林育文 | Automatically-adjusting waist-abutting device and rotary chair |
US8979200B2 (en) * | 2012-06-19 | 2015-03-17 | Su-Ming Chen | Assembly for tilting a seat |
CN103622346A (en) * | 2013-12-19 | 2014-03-12 | 嘉兴市永泰五金塑料有限责任公司 | Office chair |
CN113729426A (en) * | 2021-05-27 | 2021-12-03 | 广东联友办公家具有限公司 | Seat chassis and seat |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3434756A (en) * | 1967-04-17 | 1969-03-25 | Cramer Ind Inc | Chair with adjustable back and arm rests |
US4384741A (en) * | 1977-10-29 | 1983-05-24 | Christof Stoll Gmbh & Co. Kg | Tilting device for seating units |
US5762399A (en) * | 1996-11-13 | 1998-06-09 | Liu; Clement | Inclination positioning device for rocking type chairs |
US6033020A (en) * | 1997-09-10 | 2000-03-07 | Takano Co., Ltd. | Rocking apparatus |
US6139103A (en) * | 1997-03-12 | 2000-10-31 | Leggett & Platt, Inc. | Synchronized chair seat and backrest tilt control mechanism |
US6220664B1 (en) * | 1999-08-26 | 2001-04-24 | Ming-Hao Lee | Base structure for chair seat |
US6378943B1 (en) * | 1999-03-26 | 2002-04-30 | Northfield Metal Products Ltd. | Chair tilt lock mechanisms |
US6712428B2 (en) * | 2001-04-27 | 2004-03-30 | Co.Fe.Mo.S.P.A. | Reclining device for chairs and chair with said reclining device |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3434757A (en) * | 1967-02-02 | 1969-03-25 | Shell Oil Co | Shale oil-producing process |
US6419320B1 (en) * | 2001-02-28 | 2002-07-16 | Tung Yu Oa Co. Ltd. | Base manipulation device for office chair |
US6488336B1 (en) * | 2001-09-25 | 2002-12-03 | Tung Yu Oa Co., Ltd. | Backrest adjustment device |
-
2004
- 2004-01-30 US US10/768,592 patent/US6921134B1/en not_active Expired - Lifetime
- 2004-02-10 CN CNU2004200013003U patent/CN2680112Y/en not_active Expired - Fee Related
- 2004-06-24 GB GB0414129A patent/GB2415365A/en not_active Withdrawn
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3434756A (en) * | 1967-04-17 | 1969-03-25 | Cramer Ind Inc | Chair with adjustable back and arm rests |
US4384741A (en) * | 1977-10-29 | 1983-05-24 | Christof Stoll Gmbh & Co. Kg | Tilting device for seating units |
US5762399A (en) * | 1996-11-13 | 1998-06-09 | Liu; Clement | Inclination positioning device for rocking type chairs |
US6139103A (en) * | 1997-03-12 | 2000-10-31 | Leggett & Platt, Inc. | Synchronized chair seat and backrest tilt control mechanism |
US6033020A (en) * | 1997-09-10 | 2000-03-07 | Takano Co., Ltd. | Rocking apparatus |
US6378943B1 (en) * | 1999-03-26 | 2002-04-30 | Northfield Metal Products Ltd. | Chair tilt lock mechanisms |
US6220664B1 (en) * | 1999-08-26 | 2001-04-24 | Ming-Hao Lee | Base structure for chair seat |
US6712428B2 (en) * | 2001-04-27 | 2004-03-30 | Co.Fe.Mo.S.P.A. | Reclining device for chairs and chair with said reclining device |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103169283A (en) * | 2013-03-19 | 2013-06-26 | 浙江恒林椅业股份有限公司 | Tray structure of reclining chair |
US20190343287A1 (en) * | 2018-05-11 | 2019-11-14 | Hangzhou Zhongtai Industrial Group Co., Ltd. | Slider-crank mechanism adjustment type swivel chair tray |
Also Published As
Publication number | Publication date |
---|---|
US6921134B1 (en) | 2005-07-26 |
CN2680112Y (en) | 2005-02-23 |
GB0414129D0 (en) | 2004-07-28 |
GB2415365A (en) | 2005-12-28 |
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