US3266494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powered forceps
Assignee: Possis Machine Corp
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Filing: 1963-08-26
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Granted: 1966-08-16
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Expires: 1983-08-26
Abstract
No abstract record available.
Inventors
- 👤 Gerald K A Brownrigg
- 👤 Neil M Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:00
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/30; A61B2017/00367; A61B2017/00398
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
228 words
A POWERED FORCEPS COMPRISING A HOLLOW CYLINDER, A PAIR OF GRIPPING MEMBERS HAVING TAPERED ENDS WITH LONGITUDINALLY DIVERGING ADJACENT FACES EXTENDING IN BOTH DIRECTIONS FROM A HEMISPHERICAL FORMATION NEAR THE CENTER OF EACH WITH A SEM-CYLINDRICAL GROOVE FORMED NEAR THE CENTER OF SAID GRIPPING MEMBERS AND EXTENDING TRANSVERSELY THEREOF ON THE OPPOSITE SIDE FROM SAID HEMISPHERICAL FORMATION, A PIN FILLING SAID SEMI-CYLINDRICAL GROOVE AND ENGAGING SAID HOLLOW CYLINDER TO PIVOT SAID GRIPPING MEMBERS ON ONE END OF SAID HOLLOW CYLINDER WITH A PORTION OF SAID GRIPPING MEMBER PROTRUDING FROM SAID HOLLOW CYLINDER; SAID HEMISPHERICAL FORMATIONS ENGAGEING ADJACENT SURFACES OF SAID HOLLOW CYLINDER, A RESILIENT RING EMBRACING THE INNER ENDS OF SAID GRIPPING MEMBERS YIELDINGLY URGING THEM TOWARD EACH OTHER; THE ENDS OF SAID GRIPPING MEMBERS EMBRACED BY SAID RESILIENT RING DIVERGING FROM EACH OTHER TO FORM A NOTCH, A PISTON SLIDABLE IN A SUBSTANTIALLY FLUID-TIGHT FIT WITHIN SAID HOLLOW CYLINDER, A MEMBER EXTENDING FROM SAID PISTON AND CENTERED ADJACENT THE NOTCH FORMED IN THE INNER ENDS OF SAID GRIPPING MEMBERS, SAID MEMBER HAVING A ROUNDED END THEREON, A RETURN SPRING INTERPOSED BETWEEN SAID PISTON AND SAID HEMISPHERICAL PORTIONS, OF SAID GRIPPING MEMBERS, A SOURCE OF FLUID UNDER PRESSURE, AND MEANS FOR CONNECTING THE END OF SAID HOLLOW CYLINDER REMOTE FROM SAID GRIPPING MEMBERS TO SAID SOURCE OF FLUID UNDER PRESSURE AND RELEASING SAID FLUID UNDER PRESSURE THEREFROM SELECTIVELY.
Claim 2
Dependent Claim
228 words
A POWERED FORCEPS COMPRISING A HOLLOW CYLINDER, A PAIR OF GRIPPING MEMBERS HAVING TAPERED ENDS WITH LONGITUDINALLY DIVERGING ADJACENT FACES EXTENDING IN BOTH DIRECTIONS FROM A HEMISPHERICAL FORMATION NEAR THE CENTER OF EACH WITH A SEM-CYLINDRICAL GROOVE FORMED NEAR THE CENTER OF SAID GRIPPING MEMBERS AND EXTENDING TRANSVERSELY THEREOF ON THE OPPOSITE SIDE FROM SAID HEMISPHERICAL FORMATION, A PIN FILLING SAID SEMI-CYLINDRICAL GROOVE AND ENGAGING SAID HOLLOW CYLINDER TO PIVOT SAID GRIPPING MEMBERS ON ONE END OF SAID HOLLOW CYLINDER WITH A PORTION OF SAID GRIPPING MEMBER PROTRUDING FROM SAID HOLLOW CYLINDER; SAID HEMISPHERICAL FORMATIONS ENGAGEING ADJACENT SURFACES OF SAID HOLLOW CYLINDER, A RESILIENT RING EMBRACING THE INNER ENDS OF SAID GRIPPING MEMBERS YIELDINGLY URGING THEM TOWARD EACH OTHER; THE ENDS OF SAID GRIPPING MEMBERS EMBRACED BY SAID RESILIENT RING DIVERGING FROM EACH OTHER TO FORM A NOTCH, A PISTON SLIDABLE IN A SUBSTANTIALLY FLUID-TIGHT FIT WITHIN SAID HOLLOW CYLINDER, A MEMBER EXTENDING FROM SAID PISTON AND CENTERED ADJACENT THE NOTCH FORMED IN THE INNER ENDS OF SAID GRIPPING MEMBERS, SAID MEMBER HAVING A ROUNDED END THEREON, A RETURN SPRING INTERPOSED BETWEEN SAID PISTON AND SAID HEMISPHERICAL PORTIONS, OF SAID GRIPPING MEMBERS, A SOURCE OF FLUID UNDER PRESSURE, AND MEANS FOR CONNECTING THE END OF SAID HOLLOW CYLINDER REMOTE FROM SAID GRIPPING MEMBERS TO SAID SOURCE OF FLUID UNDER PRESSURE AND RELEASING SAID FLUID UNDER PRESSURE THEREFROM SELECTIVELY.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |