US3295846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant force shock absorber
Assignee: Individual
•
Filing: 1965-04-23
•
Granted: 1967-01-03
•
Expires: 1985-04-23
Abstract
No abstract record available.
Inventors
- 👤 Kenneth D Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:37
CPC Classifications
F; F16; F16F; F16F15/00; F16F13/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
CONSTANT FORCE-EXERTING APPARATUS COMPRISING A SEALED CHAMBER, ONE SIDE OF SAID CHAMBER COMPRISING A MOVABLE WALL, FORCE-TRANSMITTING MEANS CONNECTED TO SAID MOVABLE WALL TO TRANSMIT FORCE EXERTED BY SAID MOVABLE WALL, A HIGH VACUUM IN SAID CHAMBER CREATING A NEGATIVE PRESSURE ON ONE SIDE OF SAID MOVABLE WALL AND ATMOSPHERIC PRESSURE APPLIED FREELY TO THE OPPOSITE SIDE OF SAID MOVABLE WALL TO THEREBY EXERT A SUBSTANTIALLY CONSTANT FORCE AGAINST SAID MOVABLE WALL.
Claim 2
Dependent Claim
72 words
CONSTANT FORCE-EXERTING APPARATUS COMPRISING A SEALED CHAMBER, ONE SIDE OF SAID CHAMBER COMPRISING A MOVABLE WALL, FORCE-TRANSMITTING MEANS CONNECTED TO SAID MOVABLE WALL TO TRANSMIT FORCE EXERTED BY SAID MOVABLE WALL, A HIGH VACUUM IN SAID CHAMBER CREATING A NEGATIVE PRESSURE ON ONE SIDE OF SAID MOVABLE WALL AND ATMOSPHERIC PRESSURE APPLIED FREELY TO THE OPPOSITE SIDE OF SAID MOVABLE WALL TO THEREBY EXERT A SUBSTANTIALLY CONSTANT FORCE AGAINST SAID MOVABLE WALL.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |