US3082741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling device
Assignee: Gardner Denver Inc
•
Filing: 1960-10-28
•
Granted: 1963-03-26
•
Expires: 1980-10-28
Abstract
No abstract record available.
Inventors
- 👤 Mervin C Huffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:29
CPC Classifications
E; E21; E21B; E21B6/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
IN A PERCUSSIVE DRILLING DEVICE; A FLUID-ACTUATED HAMMER MOTOR INCLUDING A CYLINDER AND A RECIPROCATING PISTON HAMMER; A HOUSING ATTACHED TO ONE END OF SAID CYLINDER; A FLUID-ACTUATED, REVERSIBLE ROTARY MOTOR DISPOSED IN SAID HOUSING; CHUCK MEANS ROTATABLY DISPOSED AT THE OTHER END OF SAID CYLINDER FOR RELEASABLY RETAINING A TOOL THEREIN IN IMPACTING RELATIONSHIP WITH SAID PISTON HAMMER; DRIVING MEANS INTERPOSED BETWEEN SAID ROTARY MOTOR AND SAID CHUCK MEANS AND OPERABLE TO ROTATE SAID CHUCK MEANS IN RESPONSE TO ROTATION OF SAID ROTARY MOTOR; SAID DRIVING MEANS INCLUDING A SHAFT HAVING A RELATIVELY LARGE LENGTH TO DIAMETER RATIO WHEREBY SAID SHAFT IS PROVIDED A PREDETERMINED DEGREE OF TORSIONAL FLEXIBILITY; AND, INDEPENDENTLY OPERABLE FLUID CONTROL VALVES FOR THE RESPECTIVE MOTORS WHEREBY SAID CHUCK MEANS AND SAID PISTON HAMMER MAY BE OPERATED SELECTIVELY TO PROVIDE BOTH TOOL IMPACTING AND REVERSIBLE TOOL ROTATION, TOOL IMPACTING ONLY, AND REVERSIBLE TOOL ROTATION ONLY.
Claim 2
Dependent Claim
149 words
IN A PERCUSSIVE DRILLING DEVICE; A FLUID-ACTUATED HAMMER MOTOR INCLUDING A CYLINDER AND A RECIPROCATING PISTON HAMMER; A HOUSING ATTACHED TO ONE END OF SAID CYLINDER; A FLUID-ACTUATED, REVERSIBLE ROTARY MOTOR DISPOSED IN SAID HOUSING; CHUCK MEANS ROTATABLY DISPOSED AT THE OTHER END OF SAID CYLINDER FOR RELEASABLY RETAINING A TOOL THEREIN IN IMPACTING RELATIONSHIP WITH SAID PISTON HAMMER; DRIVING MEANS INTERPOSED BETWEEN SAID ROTARY MOTOR AND SAID CHUCK MEANS AND OPERABLE TO ROTATE SAID CHUCK MEANS IN RESPONSE TO ROTATION OF SAID ROTARY MOTOR; SAID DRIVING MEANS INCLUDING A SHAFT HAVING A RELATIVELY LARGE LENGTH TO DIAMETER RATIO WHEREBY SAID SHAFT IS PROVIDED A PREDETERMINED DEGREE OF TORSIONAL FLEXIBILITY; AND, INDEPENDENTLY OPERABLE FLUID CONTROL VALVES FOR THE RESPECTIVE MOTORS WHEREBY SAID CHUCK MEANS AND SAID PISTON HAMMER MAY BE OPERATED SELECTIVELY TO PROVIDE BOTH TOOL IMPACTING AND REVERSIBLE TOOL ROTATION, TOOL IMPACTING ONLY, AND REVERSIBLE TOOL ROTATION ONLY.
References Cited (Backward Citations)
US1538421A
Cited
US1452581A
Cited
US1408684A
Cited
US1807839A
Cited
US1572371A
Cited
US1488538A
Cited
US1773366A
Cited
US2154445A
Cited
US2051053A
Cited
US3044448A
Cited
FR1231192A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-25 | 1966-09-24 | 1967-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-25 | 1970-09-24 | 1971-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-25 | 1974-09-24 | 1975-03-26 | $7700.00 | Window Closed / Lapsed |