Patent US3173337A successfully refreshed from Google Patents.
US3173337A
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Hydraulic variable speed feed mechanism for machine tools and the like
Assignee: Hardinge Inc
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Filing: 1962-09-14
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Granted: 1965-03-16
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Expires: 1982-09-14
Abstract
No abstract record available.
Inventors
- 👤 Henry L Cunningham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:20
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/20; F15B15/22; F15B15/223; B; B23; B23Q; B23Q5/00; B23Q5/22; B23Q5/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A HYDRAULIC MECHANISM FOR MOVING A MACHINE PART AT DIFFERENT SPEEDS AND INCLUDING: A CYLINDER, A PISTON RECIPROCABLE IN SAID CYLINDER AND CONNECTED WITH SAID MACHINE PART, MEANS FOR ADMITTING MOTIVE FLUID TO ONE SIDE OF SAID PISTON FOR ADVANCING SAME, MEANS FOR DISCHARGING MOTIVE FLUID FROM THE OTHER SIDE OF SAID CYLINDER AT A RAPID RATE, A PART MOUNTED ON SAID PISTON AND MOVABLE INTO A POSITION TO STOP THE DISCHARGE OF FLUID AT A RAPID RATE FROM SAID OTHER SIDE OF SAID CYLINDER, OTHER FLUID DISCHARGE MEANS ON SAID OTHER SIDE OF SAID CYLINDER FOR DISCHARGE OF FLUID FROM SID CYLINDER AT A SLOW RATE TO RETARD THE RATE OF MOVEMENT OF SAID PISTON WHEN RAPID DISCHARGE HAS BEEN STOPPED, AND EXTENSIONS ON SAID PISTON AND SAID PART WHICH EXTEND TO THE EXTERIOR OF SAID CYLINDER AND ADJUSTABLE
Claim 2
Dependent Claim
140 words
A HYDRAULIC MECHANISM FOR MOVING A MACHINE PART AT DIFFERENT SPEEDS AND INCLUDING: A CYLINDER, A PISTON RECIPROCABLE IN SAID CYLINDER AND CONNECTED WITH SAID MACHINE PART, MEANS FOR ADMITTING MOTIVE FLUID TO ONE SIDE OF SAID PISTON FOR ADVANCING SAME, MEANS FOR DISCHARGING MOTIVE FLUID FROM THE OTHER SIDE OF SAID CYLINDER AT A RAPID RATE, A PART MOUNTED ON SAID PISTON AND MOVABLE INTO A POSITION TO STOP THE DISCHARGE OF FLUID AT A RAPID RATE FROM SAID OTHER SIDE OF SAID CYLINDER, OTHER FLUID DISCHARGE MEANS ON SAID OTHER SIDE OF SAID CYLINDER FOR DISCHARGE OF FLUID FROM SID CYLINDER AT A SLOW RATE TO RETARD THE RATE OF MOVEMENT OF SAID PISTON WHEN RAPID DISCHARGE HAS BEEN STOPPED, AND EXTENSIONS ON SAID PISTON AND SAID PART WHICH EXTEND TO THE EXTERIOR OF SAID CYLINDER AND ADJUSTABLE
References Cited (Backward Citations)
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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) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |