US3238847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Force-exerting apparatus
Assignee: Siemens Mobility Ltd
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Filing: 1964-07-20
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Granted: 1966-03-08
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Expires: 1984-07-20
Abstract
No abstract record available.
Inventors
- 👤 Moore Ivan Geoffrey
- 👤 Higgins Horatio Leslie
- 👤 Sobol Woldimar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:15
CPC Classifications
B; B61; B61H; B61H13/00; B60; B60T; B60T13/00; B60T13/10; B60T13/12; B60T13/16; E; E21; E21D; E21D15/00; E21D15/58; E21D15/585; E21D15/586; F; F15; F15B; F15B15/00; F15B15/20; F15B15/26; F15B15/262; F15B15/264; F15B15/08; F15B15/14; F15B2015/1495
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
139 words
A FORCE EXERTING APPARATUS COMPRISING: A FLUID ACTUATED RAM PISTON, AN ELONGATED THREADED MEMBER CONNECTED TO SAID PISTON, A THREADED NUT-LIKE MEMBER ROTATABLY THREADED ON SAID ELONGATED MEMBER AND HAVING A FIRST BRAKE SURFACE THEREON, MEANS FORMING A FIXED SECOND BRAKE SURFACE FOR COOPERATION WITH SAID FIRST BRAKE SURFACE SO AS TO PREVENT ROTATIONAL MOVEMENT OF SAID NUT-LIKE MEMBER WHEN ENGAGED, SPRING MEANS BIASING SAID NUT-LIKE MEMBER IN A PISTON RETRACTING DIRECTION IN A DIRECTION TO ENGAGE SAID BRAKE SURFACES SO THAT FLUID PRESSURE APPLIED TO EXTEND THE PISTON WILL SLIGHTLY COMPRESS SAID SPRING MEANS AND DISENGAGE SAID BRAKE SURFACES TO ALLOW ROTATION OF SAID NUT-LIKE MEMBER, THUS REQUIRING NO ADDITIONAL MEANS TO RELEASE THE BRAKE DURING RAM PISTON EXTESION, AND PRESSURE RESPONSIVE MEANS FOR SELECTIVELY COMPRESSING SAID SPRING MEANS AND DISENGAGING THE BRAKE SURFACES DURING RAM PISTON RETRACTION.
References Cited (Backward Citations)
US2660027A
Cited
US2859734A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |