Patent US4893872A successfully refreshed from Google Patents.
US4893872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Office chair with waist supporter
Assignee: MORIYA & Co Ltd A CORP OF JAPAN
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Filing: 1988-03-17
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Granted: 1990-01-16
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Expires: 2008-03-17
Abstract
Abstract An office chair having a waist supporter which is characterized in that a turning switch is installed on the back side of the chair's back-rest which is capable of adjusting said waist supporter by a user in the sitting position in order that the sitter who works for a long time in the office sitting in the chair can alleviate his fatigue by manually adjusting the waist supporter at his will.
Inventors
- 👤 Kiyoshi Sugai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:04
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/36; A47C7/40; A47C7/46; A47C7/462
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
200 words
A waist supporter for an office chair having a back board frame (11) covered, on the user's side, with buffer material (21), said waist supporter including, in combination, a generally planar waist support member (4) disposed within a cavity (22) in the buffer material (21), and means for moving the waist support member toward and away from the back board frame (11), said means comprising locating structure (8, 9, 8',8', 9'9') fixed to back board frame (11) and projecting toward the waist support member (4), guide means (6) carried by the waist support member (4) and projecting toward the back board frame (11), said locating structure being non-rotatably and telescopically coupled with the guide means for adjusting movement toward and away from the waist support member, adjustment means (15, 1, 16, 17, 2, 5) for moving the locating structure toward and away from the guide means, said adjustment means including screw means (1, 19, 14, 17, 12, 15, 16) which are rotatable, but not reciprocable, with respect to the back board frame, and connector means (2, 5) which cooperate to permit the guide means, and thus the waist support member, to move toward and away from the back board frame.
Claim 2
Dependent Claim
200 words
A waist supporter for an office chair having a back board frame (11) covered, on the user's side, with buffer material (21), said waist supporter including, in combination, a generally planar waist support member (4) disposed within a cavity (22) in the buffer material (21), and means for moving the waist support member toward and away from the back board frame (11), said means comprising locating structure (8, 9, 8',8', 9'9') fixed to back board frame (11) and projecting toward the waist support member (4), guide means (6) carried by the waist support member (4) and projecting toward the back board frame (11), said locating structure being non-rotatably and telescopically coupled with the guide means for adjusting movement toward and away from the waist support member, adjustment means (15, 1, 16, 17, 2, 5) for moving the locating structure toward and away from the guide means, said adjustment means including screw means (1, 19, 14, 17, 12, 15, 16) which are rotatable, but not reciprocable, with respect to the back board frame, and connector means (2, 5) which cooperate to permit the guide means, and thus the waist support member, to move toward and away from the back board frame.
Claim 3
Dependent Claim
135 words
In an office chair having a frame including a back rest having buffer material (21) and a waist supporter, said waist supporter comprising: a turning shaft (1) equipped with a front screw part (2), said screw part being installed through the backrest (2); a screw nut (5) engagable with a screw part (2), and a non-circular cylinder (6) surrounding said screw nut, said cylinder being perpendicularly installed to a planar waist supporting member (4); a control part (8) formed with a connecting part (9) perpendicularly installed to the front of the frame 11 and telescopically engaged with the cylinder (6); and a waist supporter adjusting mechanism formed by a turning switch (15) which is fixed to an outer end of the turning shaft (1) and which makes the waist supporting member contact the buffer material.
Claim 4
Dependent Claim
135 words
In an office chair having a frame including a back rest having buffer material (21) and a waist supporter, said waist supporter comprising: a turning shaft (1) equipped with a front screw part (2), said screw part being installed through the backrest (2); a screw nut (5) engagable with a screw part (2), and a non-circular cylinder (6) surrounding said screw nut, said cylinder being perpendicularly installed to a planar waist supporting member (4); a control part (8) formed with a connecting part (9) perpendicularly installed to the front of the frame 11 and telescopically engaged with the cylinder (6); and a waist supporter adjusting mechanism formed by a turning switch (15) which is fixed to an outer end of the turning shaft (1) and which makes the waist supporting member contact the buffer material.
References Cited (Backward Citations)
US2991124A
Cited
US3106423A
Cited
GB939909A
Cited
US3596990A
Cited
DE1805997A1
Cited
US4097087A
Cited
US4714291A
Cited
US4730871A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-15 | 1993-07-17 | 1994-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-15 | 1997-07-17 | 1998-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-15 | 2001-07-17 | 2002-01-16 | $7700.00 | Window Closed / Lapsed |