Patent US3287996A successfully refreshed from Google Patents.
US3287996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill feed
Assignee: Individual
•
Filing: 1964-11-23
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Granted: 1966-11-29
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Expires: 1984-11-23
Abstract
No abstract record available.
Inventors
- 👤 James T Doyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:52
CPC Classifications
B; B23; B23Q; B23Q5/00; B23Q5/22; B23Q5/26; B23Q11/00; B23Q11/10; Y; Y10; Y10T; Y10T408/00; Y10T408/44; Y10T408/45; Y10T408/455; Y10T408/65; Y10T408/675; Y10T408/6757
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A FEED APPARATUS FOR A DRILL HAVING A TUBULAR BIT COMPRISING A SUPPORTING FRAME, MEANS FOR SLIDABLY MOUNTING A DRILL ON SAID FRAME FOR RECIPROCAL MOVEMENT TOWARDS AND AWAY FROM THE WORK, A HOLLOW CYLINDER MEMBER, A PISTON MEMBER IN SAID CYLINDER MEMBMER DIVIDING THE LATTER INTO TWO CHAMBERS OF VARIABLE SIZE, EACH OF SAID CHAMBERS BEING ARRANGED TO BE FILLED WITH A FLUID, MEANS RIGIDLY CONNECTING ONE OF THE MEMBERS TO THE FRAME, MEANS CONNECTING THE OTHER MEMBER TO THE DRILL FOR COOPERATIVE MOVEMENT THEREWITH, VALVE CONTROLLED DISRTRIBUTION MEANS FOR SELECTIVELY AND ALTERNATELY CONNECTING A SELECTED ONE OF EITHER OF THE CHAMBERS WITH THE DRILL BIT, AND MEANS DIRECTIONALLY CONTROLLED BY SAID DISTRIBUTION MEANS, OPERABLE WHEN ONE OF THE CHAMBERS IS CONNECTED TO THE BIT FOR SUPPLYING THE OTHER CHAMBER WITH A FLUID UNDER PRES-
Claim 2
Dependent Claim
136 words
A FEED APPARATUS FOR A DRILL HAVING A TUBULAR BIT COMPRISING A SUPPORTING FRAME, MEANS FOR SLIDABLY MOUNTING A DRILL ON SAID FRAME FOR RECIPROCAL MOVEMENT TOWARDS AND AWAY FROM THE WORK, A HOLLOW CYLINDER MEMBER, A PISTON MEMBER IN SAID CYLINDER MEMBMER DIVIDING THE LATTER INTO TWO CHAMBERS OF VARIABLE SIZE, EACH OF SAID CHAMBERS BEING ARRANGED TO BE FILLED WITH A FLUID, MEANS RIGIDLY CONNECTING ONE OF THE MEMBERS TO THE FRAME, MEANS CONNECTING THE OTHER MEMBER TO THE DRILL FOR COOPERATIVE MOVEMENT THEREWITH, VALVE CONTROLLED DISRTRIBUTION MEANS FOR SELECTIVELY AND ALTERNATELY CONNECTING A SELECTED ONE OF EITHER OF THE CHAMBERS WITH THE DRILL BIT, AND MEANS DIRECTIONALLY CONTROLLED BY SAID DISTRIBUTION MEANS, OPERABLE WHEN ONE OF THE CHAMBERS IS CONNECTED TO THE BIT FOR SUPPLYING THE OTHER CHAMBER WITH A FLUID UNDER PRES-
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) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |