Patent US3891270A successfully refreshed from Google Patents.
US3891270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic stool with foot rest connected to seat base
Assignee: KRUEGER Inc A CORP OF WI
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Filing: 1974-05-10
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Granted: 1975-06-24
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Expires: 1994-05-10
Abstract
Abstract A swivel stool seat is supported by a central column and a pneumatic cylinder which adjusts the height of the seat within a predetermined range. A foot rest is rigidly attached to the seat mounting spider and depends downwardly therefrom. The foot rest turns with the seat and raises and lowers with the seat. The bottom of the pneumatic cylinder is supported by a retainer fork that extends through horizontal slots in the central column. A thrust bearing is positioned between the retainer fork and the lower end of the pneumatic cylinder. A generally cylindrical shroud removably covers the portion of the column that includes the horizontal slots for the retainer fork to hide the retainer fork from view.
Inventors
- 👤 Philip Edgar Crossman
- 👤 Richard Jerome Resch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:55
CPC Classifications
A; A47; A47C; A47C9/00; A47C9/007; A47C3/00; A47C3/20; A47C3/30; A47C7/00; A47C7/50
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
127 words
A swivel stool comprising a base including a hollow cylindrical column, a pneumatic cylinder enclosed at its lower end within the upper end of said column, a flat retainer member for supporting the lower end of said pneumatic cylinder, at least two horizontal slots formed in said column for receiving and supporting said retainer member, a thrust bearing positioned between the upper surface of said retainer member and the lower end of said pneumatic cylinder, a mounting spider attached to the upper end of said pneumatic cylinder, and a seat attached to the upper side of said mounting spider and wherein a shaft extends downwardly from the lower end of said pneumatic cylinder, and wherein one side of said retainer member is forked to embrace said shaft.
Claim 2
Dependent Claim
127 words
A swivel stool comprising a base including a hollow cylindrical column, a pneumatic cylinder enclosed at its lower end within the upper end of said column, a flat retainer member for supporting the lower end of said pneumatic cylinder, at least two horizontal slots formed in said column for receiving and supporting said retainer member, a thrust bearing positioned between the upper surface of said retainer member and the lower end of said pneumatic cylinder, a mounting spider attached to the upper end of said pneumatic cylinder, and a seat attached to the upper side of said mounting spider and wherein a shaft extends downwardly from the lower end of said pneumatic cylinder, and wherein one side of said retainer member is forked to embrace said shaft.
Claim 3
Dependent Claim
55 words
The swivel stool defined in claim 1 and further comprising a hollow bushing sleeve located within the top portion of said column, the inside diameter of said bushing sleeve being slightly larger than the outside diameter of said pneumatic cylinder, and a lower portion of said pneumatic cylinder being rotatably supported wIthin said bushing sleeve.
Claim 4
Dependent Claim
28 words
The swivel stool defined in claim 1 and further comprising a hollow cylindrical shroud covering the portion of said column including said slots for receiving said retainer member.
Claim 5
Dependent Claim
53 words
A swivel stool as defined in claim 3 and further comprising a plurality of legs radiating outwardly from the bottom of said column for supporting the same, and a plurality of slots formed in the bottom of said shroud for receiving said legs to cover the joints between said legs and said column.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |