US3674308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chair
Assignee: Crown Imports Co Inc
•
Filing: 1970-10-02
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Granted: 1972-07-04
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Expires: 1990-10-02
Abstract
Abstract A chair comprising a base, a support shaft mounted on the base and a body supporting portion mounted on the support shaft. The support shaft is fixed against rotation relative to the base and can move generally vertically relative to the base. The body supporting portion moves vertically with the support shaft and is rotatable relative to the support shaft. A locking mechanism is carried by the body supporting portion for releasably locking the body supporting portion in a preselected angular position relative to the support shaft.
Inventors
- 👤 Jason D Radding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:13
CPC Classifications
A; A47; A47C; A47C1/00; A47C1/04; A47C1/11; A47C3/00; A47C3/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
178 words
A chair comprising: a base; a support shaft projecting generally upwardly from said base and terminating in an upper end portion; first mounting means for mounting said support shaft on said base for generally up and down movement relative to said base; means on said base for elevating said support shaft relative to said base; means on said base for retaining said support shaft against rotation relative to said base; a body supporting portion adapted to support a human occupant; second mounting means on said body supporting portion for mounting said body supporting portion on said support shaft for rotation relative thereto and for generally up and down movement with said support shaft; said second mounting means including a mounting member having a wall defining a passage therein, said passage receiving the upper end portioN of said support shaft, at least one of said support shaft and said passage being tapered so that said support shaft engages and firmly supports said mounting member; and releasable locking means for locking said seat against rotation relative to said support shaft.
Claim 2
Dependent Claim
178 words
A chair comprising: a base; a support shaft projecting generally upwardly from said base and terminating in an upper end portion; first mounting means for mounting said support shaft on said base for generally up and down movement relative to said base; means on said base for elevating said support shaft relative to said base; means on said base for retaining said support shaft against rotation relative to said base; a body supporting portion adapted to support a human occupant; second mounting means on said body supporting portion for mounting said body supporting portion on said support shaft for rotation relative thereto and for generally up and down movement with said support shaft; said second mounting means including a mounting member having a wall defining a passage therein, said passage receiving the upper end portioN of said support shaft, at least one of said support shaft and said passage being tapered so that said support shaft engages and firmly supports said mounting member; and releasable locking means for locking said seat against rotation relative to said support shaft.
Claim 3
Dependent Claim
17 words
A chair as defined in claim 1 wherein said upper end of said support shaft is tapered.
Claim 4
Dependent Claim
43 words
A chair as defined in claim 1 wherein both said upper end of said support shaft and said passage are tapered at approximately the same angle to thereby provide a snug fit between said upper end of said support shaft and said passage.
Claim 5
Dependent Claim
102 words
A chair as defined in claim 1 wherein said releasable locking means includes a locking member, means for mounting said locking member for movement between a releasing position in which said locking member is out of locking engagement with said mounting member and a locking position in which said locking member is advanced toward said mounting member to lock the body supporting portion against rotation relative to the mounting member, a stop for defining said releasing position, and means for permitting adjustment of the location of said releasing position to compensate for wear of the releasable locking means and the mounting members.
Claim 6
Dependent Claim
27 words
A chair as defined in claim 1 wherein said second mounting means includes a race mounted on said body supporting portion and rotatably receiving said mounting member.
Claim 7
Dependent Claim
27 words
A chair as defined in claim 5 wherein said releasable locking means includes a locking member carried by said race and lockingly engageable with said mounting member.
Claim 8
Dependent Claim
29 words
A chair as defined in claim 6 wherein said second mounting means includes a seat bracket mounted on the underside of said body supporting portion and carrying said race.
Claim 9
Dependent Claim
66 words
A chair as defined in claim 1 wherein said releasable locking means includes a manually movable member mounted on said body supporting portion for rotation therewith and for movement relative to said body supporting portion and cam means responsive to said movement of said manually movable member relative to said body supporting portion for locking said body supporting portion against rotation relative to said support shaft.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |