Patent US3236489A successfully refreshed from Google Patents.
US3236489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power operated screw jacks
Assignee: GLOBE PNEUMATIC ENGINEERING CO
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Filing: 1964-04-03
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Granted: 1966-02-22
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Expires: 1984-04-03
Abstract
No abstract record available.
Inventors
- 👤 John C T Mattocks
- 👤 Frederick E J Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:29
CPC Classifications
B; B66; B66F; B66F3/00; B66F3/08; B66F3/20; B63; B63C; B63C5/00; B63C5/02; B63C5/04; B66F3/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
MEANS FOR STABILISHING SHIPS IN DRY DOCKS COMPRISING A LIQUID-TIGHT JACK HAVING A CASING, A SCREW ROTATABLE IN SAID CASING, MEANS RESTRAINING SAID SCREW AGAINST AXIAL DISPLACEMENT, A THREADED RAM MOUNTED ON SAID SCREW FOR AXIAL MOVEMENT RELATIVE THERETO INTO AND OUT OF ENGAGEMENT WITH A SHIP WALL, SPRING MEANS COMPRESSIBLE IN RESPONSE TO UPWARD MOVEMENT OF THE RAM TO TRANSMIT THRUST TO THE SURFACE ON WHICH THE JACK RESTS, A REVERSIBLE FLUID-OPERATED DRIVING MOTOR MOUNTED ON THE CASING OF SAID JACK AND HAVING A MECHANICAL DRIVING CONNECTION TO SAID SCREW, CIRUIT MEANS FOR SUPPLYING FLUID UNDER PRESSURE TO SAID MOTOR, FLUID-OPERATED VALVE MEANS MOUNTED ON THE CASING OF SAID PACK AND IN SAID CIRCUIT MEANS FOR THE DIRECTIONAL CONTROL OF OPERATING FLUID TO SAID MOTOR, AND A MANUALLY ACTUATED VALVE LOCATED IN SAID CIRCUIT MEANS AT A REMOTE POINT FROM SAID JACK FOR CONTROLLING THE FLOW OF OPERATING FLUID TO SAID MOTOR-CONTROL VALVE.
Claim 2
Dependent Claim
154 words
MEANS FOR STABILISHING SHIPS IN DRY DOCKS COMPRISING A LIQUID-TIGHT JACK HAVING A CASING, A SCREW ROTATABLE IN SAID CASING, MEANS RESTRAINING SAID SCREW AGAINST AXIAL DISPLACEMENT, A THREADED RAM MOUNTED ON SAID SCREW FOR AXIAL MOVEMENT RELATIVE THERETO INTO AND OUT OF ENGAGEMENT WITH A SHIP WALL, SPRING MEANS COMPRESSIBLE IN RESPONSE TO UPWARD MOVEMENT OF THE RAM TO TRANSMIT THRUST TO THE SURFACE ON WHICH THE JACK RESTS, A REVERSIBLE FLUID-OPERATED DRIVING MOTOR MOUNTED ON THE CASING OF SAID JACK AND HAVING A MECHANICAL DRIVING CONNECTION TO SAID SCREW, CIRUIT MEANS FOR SUPPLYING FLUID UNDER PRESSURE TO SAID MOTOR, FLUID-OPERATED VALVE MEANS MOUNTED ON THE CASING OF SAID PACK AND IN SAID CIRCUIT MEANS FOR THE DIRECTIONAL CONTROL OF OPERATING FLUID TO SAID MOTOR, AND A MANUALLY ACTUATED VALVE LOCATED IN SAID CIRCUIT MEANS AT A REMOTE POINT FROM SAID JACK FOR CONTROLLING THE FLOW OF OPERATING FLUID TO SAID MOTOR-CONTROL VALVE.
References Cited (Backward Citations)
FR1015388A
Cited
GB762056A
Cited
US2973178A
Cited
US3026850A
Cited
US3148714A
Cited
US3145964A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |