Patent US3168013A successfully refreshed from Google Patents.
US3168013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic systems
Assignee: INTERTEC LE QUINTIN A CORP OF FRANCE Ste
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Filing: 1963-04-11
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Granted: 1965-02-02
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Expires: 1983-04-11
Abstract
No abstract record available.
Inventors
- 👤 Williamson David Theodo Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:57
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/08; F15B15/14; F15B15/1423; F15B15/1433; F15B11/00; F15B11/08; F15B15/1447; F15B15/1452; F15B15/1457; F15B15/1461; F15B2211/00; F15B2211/70; F15B2211/705; F15B2211/7051; F15B2211/7053; F15B2211/80; F15B2211/85; F15B2211/851; F16; F16C; F16C32/00; F16C32/06; F16C32/0629; F16C32/064; Y; Y10; Y10S; Y10S92/00; Y10S92/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
182 words
A HYDRAULIC ACTUATOR FOR A MACHINE TOOL SLIDE COMPRISING A SLIDE MEMBER HAVING A CYLINDRICAL BORE AND TWO CYLINDER HEADS AT OPPOSITE ENDS OF A CYLINDRICAL SPACE DEFINED BY SAID BORE AND SAID CYLINDER HEADS, A PISTON SHAFT ARRANGED AXIALLY THROUGH SAID BORE AND THROUGH SAID CYLINDER HEADS, EACH OF THE CYLINDER HEADS HAVING A CONDUIT COMMUNICATING WITH A SPACE BETWEEN THE CYLINDER HEAD AND THE PISTON SHAFT AND THROUGH WHICH FLUID CAN BE FORCED UNDER PRESSURE SO AS TO PROVIDE A FLUID BEARING, A PISTON HEAD ON SAID PISTON SHAFT AT A POSITION BETWEEN SAID CYLINDER HEADS AND SPACED THEREFROM SO AS TO PROVIDE TWO CHAMBERS, EACH HAVING ONE END WALL FORMED BY THE PISTON HEAD AND ANOTHER END WALL FORMED SO AS OF THE CYLINDER HEADS, MEANS TO FORCE FLUID UNDER PRESSURE INTO ONE OF THE SAID CHAMBERS TO EXERT A SEPARATING FORCE BETWEEN THE PISTON HEAD AND THE CYLINDER HEAD FORMING THE END WALLS OF THE CHAMBER, AND MEANS TO HOLD THE PISTON SHAFT AGAINST AXIAL MOVEMENT SO THAT SAID SEPARATING FORCE CAUSES AXIAL MOVEMENT OF SAID SLIDE MEMBER.
Claim 2
Dependent Claim
182 words
A HYDRAULIC ACTUATOR FOR A MACHINE TOOL SLIDE COMPRISING A SLIDE MEMBER HAVING A CYLINDRICAL BORE AND TWO CYLINDER HEADS AT OPPOSITE ENDS OF A CYLINDRICAL SPACE DEFINED BY SAID BORE AND SAID CYLINDER HEADS, A PISTON SHAFT ARRANGED AXIALLY THROUGH SAID BORE AND THROUGH SAID CYLINDER HEADS, EACH OF THE CYLINDER HEADS HAVING A CONDUIT COMMUNICATING WITH A SPACE BETWEEN THE CYLINDER HEAD AND THE PISTON SHAFT AND THROUGH WHICH FLUID CAN BE FORCED UNDER PRESSURE SO AS TO PROVIDE A FLUID BEARING, A PISTON HEAD ON SAID PISTON SHAFT AT A POSITION BETWEEN SAID CYLINDER HEADS AND SPACED THEREFROM SO AS TO PROVIDE TWO CHAMBERS, EACH HAVING ONE END WALL FORMED BY THE PISTON HEAD AND ANOTHER END WALL FORMED SO AS OF THE CYLINDER HEADS, MEANS TO FORCE FLUID UNDER PRESSURE INTO ONE OF THE SAID CHAMBERS TO EXERT A SEPARATING FORCE BETWEEN THE PISTON HEAD AND THE CYLINDER HEAD FORMING THE END WALLS OF THE CHAMBER, AND MEANS TO HOLD THE PISTON SHAFT AGAINST AXIAL MOVEMENT SO THAT SAID SEPARATING FORCE CAUSES AXIAL MOVEMENT OF SAID SLIDE MEMBER.
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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) | 1968-02-02 | 1968-08-03 | 1969-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-02 | 1972-08-03 | 1973-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-02 | 1976-08-03 | 1977-02-02 | $7700.00 | Window Closed / Lapsed |