US20160037931A1 - Modified back rack - Google Patents
Modified back rack Download PDFInfo
- Publication number
- US20160037931A1 US20160037931A1 US14/456,430 US201414456430A US2016037931A1 US 20160037931 A1 US20160037931 A1 US 20160037931A1 US 201414456430 A US201414456430 A US 201414456430A US 2016037931 A1 US2016037931 A1 US 2016037931A1
- Authority
- US
- United States
- Prior art keywords
- locating
- front frame
- supporting stand
- groove
- protruding
- 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
Links
- 230000008093 supporting effect Effects 0.000 claims abstract description 57
- 238000005096 rolling process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 1
- 230000036544 posture Effects 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/36—Support for the head or the back
- A47C7/40—Support for the head or the back for the back
- A47C7/402—Support for the head or the back for the back adjustable in height
Definitions
- the invention relates to a back rack of a chair, especially a modified back rack with an adjusting function.
- a back rack is one component of a chair, and a cushion is mounted on the back rack and supported by the back rack.
- the cushion can be used to support a back of a user to provide comfort to the user when the user is sitting on the seat.
- a conventional back rack includes a front frame and a back stand connected pivotally to the front frame.
- a cushion is mounted securely on the front frame and is supported by the front frame, and the users' back leans on the cushion.
- the back stand is connected to a bottom base of the seat.
- the front frame of the conventional back rack can only swing along a vertical direction or a lateral direction relative to the back stand, and a height of the front frame relative to the back stand cannot be adjusted. Therefore, for users with different statures or with different sitting postures, the height of the cushion cannot be adjusted to meet the requirements of the users for the comfortable supporting effect. Because of the pivotal connecting relation between the front frame and the back stand, the relative height between the front frame and the back stand cannot be changed. Then, the conventional back rack is not sufficient to meet the variable height requirements of different users.
- the present invention provides a modified back rack to mitigate or obviate the aforementioned problems.
- the main objective of the present invention is to provide a modified back rack that has an adjusting function to meet requirements of different users.
- the modified back rack has a front frame, a supporting stand mounted movably on the front frame, and a positioning mount mounted securely on the front frame.
- the front frame has an adjusting base mounted on the front frame.
- the adjusting base has a protrusion formed on the adjusting base, a track area formed on the adjusting base and multiple positioning grooves formed on the protrusion.
- the supporting stand has a movement recess formed on the supporting stand, a movement space formed in the movement recess, and a moving assembly mounted in the movement recess.
- the moving assembly has a moving block, a swinging arm mounted pivotally in the moving block, and a moving pin extending from the swinging arm. The moving pin is placed in the track area.
- the present invention has height adjusting function that can meet different requirements.
- FIG. 1 is a perspective view of a modified back rack in accordance with the present invention
- FIG. 2 is a perspective side view of the modified back rack in FIG. 1 ;
- FIG. 3 is a front exploded perspective view of the modified back rack in FIG. 1 ;
- FIG. 4 is a rear exploded perspective view of the modified back rack in FIG. 1 ;
- FIG. 5 is an enlarged perspective view of a front frame of the modified back rack FIG. 1 ;
- FIG. 6 is a partially enlarged rear view of the front frame of the modified back rack in FIG. 1 ;
- FIG. 7 is a partially enlarged front view of the supporting stand of the modified back rack in FIG. 1 ;
- FIG. 8 is a cross-sectional side view of the supporting stand of the modified back rack along line 8 - 8 in FIG. 7 ;
- FIG. 9 is a perspective view of a positioning mount of the modified back rack in FIG. 1 ;
- FIG. 10 is an exploded and enlarged perspective view of a moving assembly of the modified back rack in FIG. 3 ;
- FIG. 11 is an exploded and enlarged perspective view of the moving assembly and the front frame of the modified back rack in FIG. 1 ;
- FIG. 12 is an operational side view of the moving pin rolling in a track area in FIG. 11 ;
- FIG. 13 is an operational side view of the moving pin located in a top of the track area in FIG. 11 ;
- FIG. 14 is an operational side view of the moving pin located in a bottom of the track area in FIG. 11 .
- a modified back rack in accordance with the present invention comprises a front frame 10 , a supporting stand 20 , a positioning mount 30 and a moving assembly 40 .
- the front frame 10 has a locating arm 11 , a locating portion 12 , a limiting area 13 , a locating groove 14 , a backing plate 15 , an adjusting base 16 and multiple screw holes 17 .
- the locating arm 11 is mounted laterally in the front frame 10 .
- the locating portion 12 is formed on and protrudes from a central surface of the locating arm 11 .
- the limiting area 13 is concaved on a rear end of the locating portion 12
- the locating groove 14 is formed on a middle surface of the locating portion 12 .
- the backing plate 15 is formed on a top end of the front frame 10 over the locating arm 11 .
- the adjusting base 16 is formed on a rear end of the backing plate 15 .
- the adjusting base 16 has a protrusion 161 , a track area 162 , and multiple positioning grooves 163 .
- the protrusion 161 extends from the adjusting base 16
- the track area 162 is concaved in the adjusting base 16 around the protrusion 161 .
- the positioning grooves 163 are formed perpendicularly on an outer surface of the protrusion 161 and communicate with the track area 162 . With reference to FIG. 6 , each one of the positioning grooves 163 is oblique.
- the screw holes 17 are formed on the rear end of the backing plate 15 around the adjusting base 16 .
- the supporting stand 20 is mounted on the rear end of the front frame 10 and a width of the supporting stand 20 is equal to a width of the limiting area 13 .
- the supporting stand 20 has a linking base 21 , a slide groove 25 , multiple threaded holes 22 , a movement recess 23 and two inner tracks 24 .
- the linking base 21 is mounted on a bottom end of the supporting stand 20 under the front frame 10 .
- the slide groove 25 is formed on a front surface of the supporting stand 20 and corresponding to the locating groove 14 .
- the threaded holes 22 are formed on two opposite ends of the slide groove 25 .
- the movement recess 23 is formed on a top end of the supporting stand 20 corresponding to the adjusting base 16 , and has a movement space 231 formed in the movement recess 23 , two elongated grooves 232 formed symmetrically in the movement recess 23 and communicating with the movement recess 23 , a lateral groove 233 formed in the movement recess 23 and communicating with the elongated grooves 232 , wherein a depth of the lateral groove 233 is smaller than a depth of each of the elongated grooves 232 , and a limiting hole 234 formed through a rear end of the supporting stand 20 and communicating with the movement space 231 .
- the inner tracks 24 are formed on two opposite outer surfaces of the supporting stand 20 . In a preferred embodiment, the inner tracks 24 can be formed as guiding grooves as shown in FIG. 8 or can be formed as protruding bars.
- the positioning mount 30 is mounted securely on the backing plate 15 of the front frame 10 , and has two protruding plates 31 , a through area 32 , two outer tracks 33 , a positioning hole 34 and two wings 35 .
- the protruding plates 31 extend afterwards from two opposite sides of the positioning mount 30 .
- the through area 32 is formed between the protruding plates 31 , and the outer tracks 33 are located in the through area 32 and are formed on inner walls of the protruding plates 31 .
- the through area 32 is mounted through by the supporting stand 20 , and the outer tracks 33 engage with the inner tracks 24 .
- the outer tracks 33 can be formed as protruding bars 331 corresponding to the guiding grooves 241 of the inner track 24 or can be formed as concave grooves corresponding to the protruding bars of the inner tracks 24 .
- the positioning hole 34 is formed through the through area 32 and corresponds to the track area 162 of the adjusting base 16 .
- the wings 35 are respectively formed on and protrude from two outer sides of the protruding plates 31 , and each wing 35 has multiple through holes 351 formed through the wing 35 .
- the moving assembly 40 is mounted in the top end of the supporting stand 20 and has a moving block 41 , a swinging arm 42 , a locating sheet 43 , a first spring 44 and a second spring 45 .
- the moving block 41 is mounted in the movement space 231 of the movement recess 23 , a width of the moving block 41 is equal to a width of the movement space 231 , and a height of the moving block 41 is smaller than a height of the movement space 231 .
- the moving block 41 has a fixing groove 411 formed on a front surface of the moving block 41 , a locating hole 412 formed in a top end of the fixing groove 411 , two oblique slots 413 formed in two central sides of the fixing groove 411 , a bottom groove 414 extending from a bottom end of the fixing groove 411 , an arc hole 415 formed through the bottom groove 414 , two locating rods 416 protruding from a bottom surface of the moving block 41 and respectively mounted in the corresponding elongated grooves 232 , two third springs 417 mounted around the locating rods 416 , and a fastening pin 418 formed on a rear end of the moving block 41 and mounted through the limiting hole 234 of the movement space 23 .
- the swinging arm 42 is mounted in the moving block 41 and has a fixing pin 421 extending from a top end of the swinging arm 42 and pivotally mounted in the locating hole 412 , two lumps 422 extending from the swinging arm 42 and mounted in the corresponding oblique slots 413 , and a moving pin 423 extending from a bottom end of the swinging arm 42 and mounted through the positioning hole 34 and located in the track area 162 .
- the moving pin 423 is held in one of the positioning grooves 163 .
- the locating sheet 43 has a lateral plate 431 mounted in the lateral groove 233 , two fixing plates 432 extending downwardly from the lateral plate 431 and mounted in the elongated grooves 232 to cover the locating rods 416 , two fixing holes 433 formed through the lateral plate 431 , and two limiting protruding sheets 434 formed on a rear end of the lateral plate 431 , wherein the limiting protruding sheets 434 are mounted through by the locating rods 416 and are pressed by the third springs 417 .
- the first spring 44 and the second spring 45 are respectively mounted around the lumps 422 of the swinging arm 42 and respectively lean against the oblique slots 413 , and a stiffness of the first spring 44 is larger than a stiffness of the second spring 45 . So the swinging arm 42 is slanted in a direction toward the second spring 45 , and the second spring 45 is compressed by the swinging arm 42 .
- the locating sheet 43 is mounted securely in the lateral groove 233 by locking components.
- the supporting stand 20 is mounted and positioned in the positioning mount 30 , and the positioning mount 30 can be moved vertically along the supporting stand 20 due to the connection between the inner tracks 24 and the outer tracks 33 .
- the modified back rack of the present invention has a cover 50 mounted on the rear end of the supporting stand 20 and covered securely on the positioning mount 30 . Multiple locking components are mounted through the cover 50 and the through holes 351 and then are fastened in the screw holes 17 .
- the modified back rack of the present invention has a vertical buckle 60 mounted in the locating groove 14 and locked in the threaded holes 22 of the supporting stand 20 by using locking components. So the front frame 10 is limited by the supporting stand 20 to move along the slide groove 25 .
- the swinging arm 42 and the moving block 41 are slightly moved downwards in the movement space 231 and are pushed by the protrusion 161 , but are returned quickly to the original position when rolling to one of the positioning grooves 163 due to the elastic forces of the first spring 44 and the second spring 45 .
- the moving pin 423 is fastened in the next positioning groove 163 , and the front frame 10 is lifted to a higher position.
- the present invention has four positioning grooves 163 and can be adjusted to four different heights.
- the moving pin 423 leaves the lowest positioning groove 163 , the moving pin 423 can move back to the top end of the track area 162 due to the weights of the front frame 10 .
- the front frame 10 is repeatedly pulled for being fastened in one of the positioning grooves 163 . So the front frame 10 of the modified back rack of the present invention can be adjusted for the height relative to the supporting stand 20 , and different users can adjust the heights of the front frame based on the personal requirements for improved practicality of the chair.
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- Furniture Connections (AREA)
Abstract
Description
- 1. Field of the Invention
- The invention relates to a back rack of a chair, especially a modified back rack with an adjusting function.
- 2. Description of the Prior Arts
- A back rack is one component of a chair, and a cushion is mounted on the back rack and supported by the back rack. The cushion can be used to support a back of a user to provide comfort to the user when the user is sitting on the seat.
- A conventional back rack includes a front frame and a back stand connected pivotally to the front frame. A cushion is mounted securely on the front frame and is supported by the front frame, and the users' back leans on the cushion. The back stand is connected to a bottom base of the seat.
- However, the front frame of the conventional back rack can only swing along a vertical direction or a lateral direction relative to the back stand, and a height of the front frame relative to the back stand cannot be adjusted. Therefore, for users with different statures or with different sitting postures, the height of the cushion cannot be adjusted to meet the requirements of the users for the comfortable supporting effect. Because of the pivotal connecting relation between the front frame and the back stand, the relative height between the front frame and the back stand cannot be changed. Then, the conventional back rack is not sufficient to meet the variable height requirements of different users.
- To overcome the shortcomings, the present invention provides a modified back rack to mitigate or obviate the aforementioned problems.
- The main objective of the present invention is to provide a modified back rack that has an adjusting function to meet requirements of different users.
- The modified back rack has a front frame, a supporting stand mounted movably on the front frame, and a positioning mount mounted securely on the front frame. The front frame has an adjusting base mounted on the front frame. The adjusting base has a protrusion formed on the adjusting base, a track area formed on the adjusting base and multiple positioning grooves formed on the protrusion. The supporting stand has a movement recess formed on the supporting stand, a movement space formed in the movement recess, and a moving assembly mounted in the movement recess. The moving assembly has a moving block, a swinging arm mounted pivotally in the moving block, and a moving pin extending from the swinging arm. The moving pin is placed in the track area. The present invention has height adjusting function that can meet different requirements.
- Other objectives, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
-
FIG. 1 is a perspective view of a modified back rack in accordance with the present invention; -
FIG. 2 is a perspective side view of the modified back rack inFIG. 1 ; -
FIG. 3 is a front exploded perspective view of the modified back rack inFIG. 1 ; -
FIG. 4 is a rear exploded perspective view of the modified back rack in FIG. 1; -
FIG. 5 is an enlarged perspective view of a front frame of the modified back rackFIG. 1 ; -
FIG. 6 is a partially enlarged rear view of the front frame of the modified back rack inFIG. 1 ; -
FIG. 7 is a partially enlarged front view of the supporting stand of the modified back rack inFIG. 1 ; -
FIG. 8 is a cross-sectional side view of the supporting stand of the modified back rack along line 8-8 inFIG. 7 ; -
FIG. 9 is a perspective view of a positioning mount of the modified back rack inFIG. 1 ; -
FIG. 10 is an exploded and enlarged perspective view of a moving assembly of the modified back rack inFIG. 3 ; -
FIG. 11 is an exploded and enlarged perspective view of the moving assembly and the front frame of the modified back rack inFIG. 1 ; -
FIG. 12 is an operational side view of the moving pin rolling in a track area inFIG. 11 ; -
FIG. 13 is an operational side view of the moving pin located in a top of the track area inFIG. 11 ; and -
FIG. 14 is an operational side view of the moving pin located in a bottom of the track area inFIG. 11 . - With reference to
FIGS. 1 and 2 , a modified back rack in accordance with the present invention comprises afront frame 10, a supportingstand 20, apositioning mount 30 and a movingassembly 40. - With reference to
FIGS. 3 and 4 , thefront frame 10 has a locatingarm 11, a locatingportion 12, alimiting area 13, a locatinggroove 14, abacking plate 15, an adjustingbase 16 andmultiple screw holes 17. The locatingarm 11 is mounted laterally in thefront frame 10. The locatingportion 12 is formed on and protrudes from a central surface of the locatingarm 11. As shown inFIG. 5 , thelimiting area 13 is concaved on a rear end of the locatingportion 12, and the locatinggroove 14 is formed on a middle surface of the locatingportion 12. Thebacking plate 15 is formed on a top end of thefront frame 10 over the locatingarm 11. - The adjusting
base 16 is formed on a rear end of thebacking plate 15. The adjustingbase 16 has aprotrusion 161, atrack area 162, andmultiple positioning grooves 163. Theprotrusion 161 extends from theadjusting base 16, and thetrack area 162 is concaved in the adjustingbase 16 around theprotrusion 161. Thepositioning grooves 163 are formed perpendicularly on an outer surface of theprotrusion 161 and communicate with thetrack area 162. With reference toFIG. 6 , each one of thepositioning grooves 163 is oblique. Thescrew holes 17 are formed on the rear end of thebacking plate 15 around the adjustingbase 16. - With further reference to
FIGS. 3 and 4 , the supportingstand 20 is mounted on the rear end of thefront frame 10 and a width of the supportingstand 20 is equal to a width of thelimiting area 13. The supportingstand 20 has a linkingbase 21, aslide groove 25, multiple threadedholes 22, a movement recess 23 and twoinner tracks 24. The linkingbase 21 is mounted on a bottom end of the supportingstand 20 under thefront frame 10. Theslide groove 25 is formed on a front surface of the supportingstand 20 and corresponding to the locatinggroove 14. The threadedholes 22 are formed on two opposite ends of theslide groove 25. - With reference to
FIGS. 7 and 8 , themovement recess 23 is formed on a top end of the supportingstand 20 corresponding to theadjusting base 16, and has amovement space 231 formed in the movement recess 23, twoelongated grooves 232 formed symmetrically in the movement recess 23 and communicating with the movement recess 23, alateral groove 233 formed in the movement recess 23 and communicating with theelongated grooves 232, wherein a depth of thelateral groove 233 is smaller than a depth of each of theelongated grooves 232, and a limitinghole 234 formed through a rear end of the supportingstand 20 and communicating with themovement space 231. Theinner tracks 24 are formed on two opposite outer surfaces of the supportingstand 20. In a preferred embodiment, theinner tracks 24 can be formed as guiding grooves as shown inFIG. 8 or can be formed as protruding bars. - With reference to
FIGS. 3 , 4 and 9, thepositioning mount 30 is mounted securely on thebacking plate 15 of thefront frame 10, and has twoprotruding plates 31, a througharea 32, twoouter tracks 33, apositioning hole 34 and twowings 35. Theprotruding plates 31 extend afterwards from two opposite sides of thepositioning mount 30. The througharea 32 is formed between theprotruding plates 31, and theouter tracks 33 are located in the througharea 32 and are formed on inner walls of theprotruding plates 31. The througharea 32 is mounted through by the supportingstand 20, and theouter tracks 33 engage with the inner tracks 24. In a preferred embodiment, theouter tracks 33 can be formed as protrudingbars 331 corresponding to the guidinggrooves 241 of theinner track 24 or can be formed as concave grooves corresponding to the protruding bars of the inner tracks 24. Thepositioning hole 34 is formed through the througharea 32 and corresponds to thetrack area 162 of the adjustingbase 16. Thewings 35 are respectively formed on and protrude from two outer sides of the protrudingplates 31, and eachwing 35 has multiple throughholes 351 formed through thewing 35. - With reference to
FIGS. 3 , 4 and 10, the movingassembly 40 is mounted in the top end of the supportingstand 20 and has a movingblock 41, a swingingarm 42, a locatingsheet 43, afirst spring 44 and asecond spring 45. The movingblock 41 is mounted in themovement space 231 of themovement recess 23, a width of the movingblock 41 is equal to a width of themovement space 231, and a height of the movingblock 41 is smaller than a height of themovement space 231. - The moving
block 41 has a fixinggroove 411 formed on a front surface of the movingblock 41, a locatinghole 412 formed in a top end of the fixinggroove 411, twooblique slots 413 formed in two central sides of the fixinggroove 411, abottom groove 414 extending from a bottom end of the fixinggroove 411, anarc hole 415 formed through thebottom groove 414, two locatingrods 416 protruding from a bottom surface of the movingblock 41 and respectively mounted in the correspondingelongated grooves 232, twothird springs 417 mounted around the locatingrods 416, and afastening pin 418 formed on a rear end of the movingblock 41 and mounted through the limitinghole 234 of themovement space 23. - The swinging
arm 42 is mounted in the movingblock 41 and has a fixingpin 421 extending from a top end of the swingingarm 42 and pivotally mounted in the locatinghole 412, twolumps 422 extending from the swingingarm 42 and mounted in the correspondingoblique slots 413, and a movingpin 423 extending from a bottom end of the swingingarm 42 and mounted through thepositioning hole 34 and located in thetrack area 162. The movingpin 423 is held in one of thepositioning grooves 163. - The locating
sheet 43 has alateral plate 431 mounted in thelateral groove 233, two fixingplates 432 extending downwardly from thelateral plate 431 and mounted in theelongated grooves 232 to cover the locatingrods 416, two fixingholes 433 formed through thelateral plate 431, and two limiting protrudingsheets 434 formed on a rear end of thelateral plate 431, wherein the limiting protrudingsheets 434 are mounted through by the locatingrods 416 and are pressed by the third springs 417. - With reference to
FIGS. 10 , 12 and 13, thefirst spring 44 and thesecond spring 45 are respectively mounted around thelumps 422 of the swingingarm 42 and respectively lean against theoblique slots 413, and a stiffness of thefirst spring 44 is larger than a stiffness of thesecond spring 45. So the swingingarm 42 is slanted in a direction toward thesecond spring 45, and thesecond spring 45 is compressed by the swingingarm 42. The locatingsheet 43 is mounted securely in thelateral groove 233 by locking components. - The supporting
stand 20 is mounted and positioned in thepositioning mount 30, and thepositioning mount 30 can be moved vertically along the supportingstand 20 due to the connection between theinner tracks 24 and the outer tracks 33. The modified back rack of the present invention has acover 50 mounted on the rear end of the supportingstand 20 and covered securely on thepositioning mount 30. Multiple locking components are mounted through thecover 50 and the throughholes 351 and then are fastened in the screw holes 17. - With reference to
FIG. 1 , the modified back rack of the present invention has avertical buckle 60 mounted in the locatinggroove 14 and locked in the threadedholes 22 of the supportingstand 20 by using locking components. So thefront frame 10 is limited by the supportingstand 20 to move along theslide groove 25. - With reference to
FIGS. 3 , 11 and 12, when adjusting a height of thefront frame 10 relative to the supportingstand 20, thefront frame 10 is pulled upwards to make the movingpin 423 of the swingingarm 42 move downwards along thetrack area 162 to leave acorresponding positioning groove 163. When the movingpin 423 moves to anext positioning groove 163, the movingpin 423 is held in thecorresponding positioning groove 163 by the elastic force of thefirst spring 44. With reference toFIGS. 12 to 14 , in the adjusting process, the swingingarm 42 and the movingblock 41 are slightly moved downwards in themovement space 231 and are pushed by theprotrusion 161, but are returned quickly to the original position when rolling to one of thepositioning grooves 163 due to the elastic forces of thefirst spring 44 and thesecond spring 45. At the moment, the movingpin 423 is fastened in thenext positioning groove 163, and thefront frame 10 is lifted to a higher position. - With reference to
FIGS. 6 , 13 and 14, the present invention has fourpositioning grooves 163 and can be adjusted to four different heights. When the movingpin 423 leaves thelowest positioning groove 163, the movingpin 423 can move back to the top end of thetrack area 162 due to the weights of thefront frame 10. Thefront frame 10 is repeatedly pulled for being fastened in one of thepositioning grooves 163. So thefront frame 10 of the modified back rack of the present invention can be adjusted for the height relative to the supportingstand 20, and different users can adjust the heights of the front frame based on the personal requirements for improved practicality of the chair. - Even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and features of the invention, the disclosure is illustrative only. Changes may be made in the details, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US14/456,430 US9247821B1 (en) | 2014-08-11 | 2014-08-11 | Modified back rack |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US14/456,430 US9247821B1 (en) | 2014-08-11 | 2014-08-11 | Modified back rack |
Publications (2)
Publication Number | Publication Date |
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US9247821B1 US9247821B1 (en) | 2016-02-02 |
US20160037931A1 true US20160037931A1 (en) | 2016-02-11 |
Family
ID=55174786
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US14/456,430 Expired - Fee Related US9247821B1 (en) | 2014-08-11 | 2014-08-11 | Modified back rack |
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US (1) | US9247821B1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9596941B1 (en) * | 2016-02-02 | 2017-03-21 | Office Master Inc. | Chair back with height and lumbar adjustment |
CN108209278A (en) * | 2017-12-15 | 2018-06-29 | 东莞致诚办公家具有限公司 | Seat with Lumbar position adjustment function |
US10219627B2 (en) * | 2016-09-29 | 2019-03-05 | Steelcase Inc. | Compliant seating structure |
US10813463B2 (en) | 2017-12-05 | 2020-10-27 | Steelcase Inc. | Compliant backrest |
US11291305B2 (en) | 2017-12-05 | 2022-04-05 | Steelcase Inc. | Compliant backrest |
US11324323B2 (en) | 2019-09-18 | 2022-05-10 | Steelcase Inc. | Body support member with lattice structure |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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EP2759230B1 (en) * | 2013-01-23 | 2015-09-30 | L & P Property Management Company | Chair back height adjustment mechanism and chair |
KR101967201B1 (en) * | 2018-08-31 | 2019-04-09 | 주식회사 다원체어스 | Chair with lumbar support flexion control module |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4639039A (en) * | 1985-09-10 | 1987-01-27 | Milsco Manufacturing Company | Height adjustment mechanism for chair backrest |
TW400709U (en) * | 1999-08-19 | 2000-08-01 | Tay Huah Furniture Corp | Chair back height adjusting device |
US6422652B1 (en) * | 2000-11-29 | 2002-07-23 | Haworth, Inc. | Height adjusting mechanism |
US6631953B2 (en) * | 2001-09-25 | 2003-10-14 | Yu-Shan Lai | Backrest elevator device |
US7360837B1 (en) * | 2007-05-29 | 2008-04-22 | Chia-Shan Liu | Backrest adjusting device for chair |
US7775593B2 (en) * | 2008-10-09 | 2010-08-17 | Jung-Hua Hu | Adjusting device of a chair backrest |
US8020934B2 (en) * | 2009-07-15 | 2011-09-20 | Jung-Hua Hu | Chair backrest elevating device |
US8128309B2 (en) * | 2009-10-13 | 2012-03-06 | Po-Chuan Tsai | Lifting device for the backrest of a chair |
-
2014
- 2014-08-11 US US14/456,430 patent/US9247821B1/en not_active Expired - Fee Related
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9596941B1 (en) * | 2016-02-02 | 2017-03-21 | Office Master Inc. | Chair back with height and lumbar adjustment |
US9968199B2 (en) | 2016-02-02 | 2018-05-15 | Office Master Inc. | Chair back with height and lumbar adjustment |
US11771227B2 (en) | 2016-09-29 | 2023-10-03 | Steelcase Inc. | Compliant seating structure |
US10219627B2 (en) * | 2016-09-29 | 2019-03-05 | Steelcase Inc. | Compliant seating structure |
US11324322B2 (en) | 2016-09-29 | 2022-05-10 | Steelcase Inc. | Compliant seating structure |
US10820705B2 (en) | 2016-09-29 | 2020-11-03 | Steelcase Inc. | Compliant seating structure |
US11291305B2 (en) | 2017-12-05 | 2022-04-05 | Steelcase Inc. | Compliant backrest |
US10813463B2 (en) | 2017-12-05 | 2020-10-27 | Steelcase Inc. | Compliant backrest |
US11583092B2 (en) | 2017-12-05 | 2023-02-21 | Steelcase Inc. | Compliant backrest |
US11819139B2 (en) | 2017-12-05 | 2023-11-21 | Steelcase Inc. | Compliant backrest |
US12004660B2 (en) | 2017-12-05 | 2024-06-11 | Steelcase Inc. | Compliant backrest |
CN108209278A (en) * | 2017-12-15 | 2018-06-29 | 东莞致诚办公家具有限公司 | Seat with Lumbar position adjustment function |
US11324323B2 (en) | 2019-09-18 | 2022-05-10 | Steelcase Inc. | Body support member with lattice structure |
US11974676B2 (en) | 2019-09-18 | 2024-05-07 | Steelcase Inc. | Body support member with lattice structure |
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US9247821B1 (en) | 2016-02-02 |
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