US3251256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid actuated toolholder
Assignee: International Business Machines Corp
•
Filing: 1964-06-26
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Granted: 1966-05-17
•
Expires: 1984-06-26
Abstract
No abstract record available.
Inventors
- 👤 Thomas W Mcgrath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:17
CPC Classifications
B; B26; B26D; B26D7/00; B26D7/26; B26D7/2614; Y; Y10; Y10T; Y10T83/00; Y10T83/929; Y10T83/9372; Y10T83/9396; Y10T83/9399; Y10T83/9406; Y10T83/9457; Y10T83/9464; Y10T83/9469; Y10T83/9471
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A FLUID ACTUATED TOOLHOLDER, COMPRISING: A PAIR OR RELATIVELY MOVABLE JAWS INCLUDING A PAIR OF CLAMPING FACES, SAID FACES BEING PARALLEL TO ONE ANOTHER AND PERPENDICULAR TO A DIRECT ALONG WHICH SAID JAWS ARE RELATIVELY MOVABLE; A SELF-LOCKING TAPER BAR ADAPTED TO COACT WITH A SURFACE OF ONE OF SAID JAWS AS SO TO MOVE IT TOWARD THE OTHER JAW TO CLAMP A TOOL IN RESPONSE TO A LOCKING FORCE; A FLUID EXPANSIBLE CHAMBER ADAPTED TO ACT AGAINST SAID TAPER BAR; AND MEANS FOR MOMENTARILY FORCING FLUID UNDER PRESSURE INTO SAID CHAMBER TO APPLY A LOCKING FORCE TO SAID TAPER BAR, SAID MEANS REMOVING SAID PRESSURE AFTER SAID LOCKING FORCE HAS BEEN APPLIED, WHEREBY SAID CHAMBER IS MAINTAINED IN A NON-PRESSURIZED CONDITION DURING OPERATION OF SAID TOOL.
Claim 2
Dependent Claim
127 words
A FLUID ACTUATED TOOLHOLDER, COMPRISING: A PAIR OR RELATIVELY MOVABLE JAWS INCLUDING A PAIR OF CLAMPING FACES, SAID FACES BEING PARALLEL TO ONE ANOTHER AND PERPENDICULAR TO A DIRECT ALONG WHICH SAID JAWS ARE RELATIVELY MOVABLE; A SELF-LOCKING TAPER BAR ADAPTED TO COACT WITH A SURFACE OF ONE OF SAID JAWS AS SO TO MOVE IT TOWARD THE OTHER JAW TO CLAMP A TOOL IN RESPONSE TO A LOCKING FORCE; A FLUID EXPANSIBLE CHAMBER ADAPTED TO ACT AGAINST SAID TAPER BAR; AND MEANS FOR MOMENTARILY FORCING FLUID UNDER PRESSURE INTO SAID CHAMBER TO APPLY A LOCKING FORCE TO SAID TAPER BAR, SAID MEANS REMOVING SAID PRESSURE AFTER SAID LOCKING FORCE HAS BEEN APPLIED, WHEREBY SAID CHAMBER IS MAINTAINED IN A NON-PRESSURIZED CONDITION DURING OPERATION OF SAID TOOL.
References Cited (Backward Citations)
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US1601335A
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US2291147A
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US2420146A
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FR971006A
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US2652749A
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US2801649A
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US3008366A
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US3101639A
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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) | 1969-05-16 | 1969-11-15 | 1970-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-16 | 1973-11-15 | 1974-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-16 | 1977-11-15 | 1978-05-17 | $7700.00 | Window Closed / Lapsed |