US3381926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable stool
Assignee: EDWARD E FRITZ
•
Filing: 1966-10-20
•
Granted: 1968-05-07
•
Expires: 1986-10-20
Abstract
No abstract record available.
Inventors
- 👤 Edward E Fritz
- 👤 Thomas A Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:13
CPC Classifications
A; A47; A47C; A47C3/00; A47C3/20; A47C3/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A HEIGHT ADJUSTING MECHANISM FOR A STOOL HAVING A BASE FRAMEWORK AND A SEAT COMPRISING SPACED-APART HOLLOW INNER AND OUTER MEMBERS DISPOSED ON SAID BASE FRAMEWORK, CAP MEMBERS AT OPPOSITE ENDS OF SAID HOLLOW INNER AND OUTER MEMBERS, AN INNER SEAT MOUNTING PISTON SLIDABLE WITHIN SAID HOLLOW INNER MEMBER, AN OUTER PISTON SLIDABLE IN THE SPACE BETWEEN SAID HOLLOW INNER MEMBER AND SAID HOLLOW OUTER MEMBER, COMPRESSION MEANS URGING SAID OUTER PISTON IN A DOWNWARD DIRECTION, CAVITIES CONTAINING A LIQUID IN SAID HOLLOW INNER MEMBER BELOW SAID INNER PISTON AND IN THE SPACE BETWEEN SAID HOLLOW INNER MEMBER AND SAID HOLLOW OUTER MEMBER BELOW SAID OUTER PISTON, PASSAGEWAYS THROUGH SAID CAP MEMBER AT THE LOWER ENDS OF SAID HOLLOW INNER AND OUTER MEMBERS COMMUNICATING WITH SAID CAVITIES, AND CONTROL MECHANISM SELECTIVELY PERMITTING COMMUNICATION BETWEEN SAID PASSAGEWAYS FOR SEAT HEIGHT ADJUSTMENT.
Claim 2
Dependent Claim
140 words
A HEIGHT ADJUSTING MECHANISM FOR A STOOL HAVING A BASE FRAMEWORK AND A SEAT COMPRISING SPACED-APART HOLLOW INNER AND OUTER MEMBERS DISPOSED ON SAID BASE FRAMEWORK, CAP MEMBERS AT OPPOSITE ENDS OF SAID HOLLOW INNER AND OUTER MEMBERS, AN INNER SEAT MOUNTING PISTON SLIDABLE WITHIN SAID HOLLOW INNER MEMBER, AN OUTER PISTON SLIDABLE IN THE SPACE BETWEEN SAID HOLLOW INNER MEMBER AND SAID HOLLOW OUTER MEMBER, COMPRESSION MEANS URGING SAID OUTER PISTON IN A DOWNWARD DIRECTION, CAVITIES CONTAINING A LIQUID IN SAID HOLLOW INNER MEMBER BELOW SAID INNER PISTON AND IN THE SPACE BETWEEN SAID HOLLOW INNER MEMBER AND SAID HOLLOW OUTER MEMBER BELOW SAID OUTER PISTON, PASSAGEWAYS THROUGH SAID CAP MEMBER AT THE LOWER ENDS OF SAID HOLLOW INNER AND OUTER MEMBERS COMMUNICATING WITH SAID CAVITIES, AND CONTROL MECHANISM SELECTIVELY PERMITTING COMMUNICATION BETWEEN SAID PASSAGEWAYS FOR SEAT HEIGHT ADJUSTMENT.
References Cited (Backward Citations)
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Cited
US2237915A
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US2636348A
Cited
US2586442A
Cited
US3143332A
Cited
US3311407A
Cited
US3339873A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-07 | 1971-11-06 | 1972-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-07 | 1975-11-06 | 1976-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-07 | 1979-11-06 | 1980-05-07 | $7700.00 | Window Closed / Lapsed |