US3396807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary-impact drill
Assignee: JACK K MENTON
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Filing: 1966-09-27
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Granted: 1968-08-13
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Expires: 1986-09-27
Abstract
No abstract record available.
Inventors
- 👤 Jack K Menton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:03
CPC Classifications
E; E21; E21B; E21B4/00; E21B4/06; E21B4/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A ROTARY-IMPACT DRILL, COMPRISING: AN ANVIL ADAPTED FOR CONNECTION TO A DRILL BIT FOR TURNING THEREWITH; A HAMMER MOUNTED FOR AXIAL AND ROTATIONAL MOVEMENT RELATIVE TO SAID ANVIL; SPRING MEANS CONTINUOUSLY URGING SAID HAMMER TOWARD SAID ANVIL; COMPLEMENTARY, TOOTH-SHAPED HAMMER AND ANVIL CAMS ON SAID HAMMER AND ANVIL, RESPECTIVELY, INCLUDING COOPERATIVE VERTICALLY SLOPING SURFACES TERMINATING IN SUBSTANTIALLY VERTICAL SHOULDERS WHEREBY AS SAID HAMMER ROTATES RELATIVE TO SAID ANVIL, SAID HAMMER CAMS REPEATEDLY RIDE UP ALONG SAID SLOPING SURFACES SAID ANVIL CAMS AND UNDER THE INFLUENCE OF SAID SPRING MEANS DROP HEAVILY ONTO SAID ANVIL CAM UPON LEAVING SAID SLOPING SURFACES AND REACHING SAID SHOULDERS OF SAID ANVIL CAMS; AND COOPERATIVE MEANS CONNECTED TO SAID ANVIL AND HAMMER FOR DIRECTING SAID HAMMER CAMS VERTICALLY DOWNWARD DURING EACH DROP WITH SAID SHOULDERS OF SAID HAMMER CAMS DROPPING ALONG AND IMMEDIATELY ADJACENT SAID SHOULDERS OF SAID ANVIL CAMS TO INSURE A MAXIMUM HAMMER STROKE AND A MAXIMUM HAMMER AND ANVIL IMPACT DURING EACH DROP.
Claim 2
Dependent Claim
161 words
A ROTARY-IMPACT DRILL, COMPRISING: AN ANVIL ADAPTED FOR CONNECTION TO A DRILL BIT FOR TURNING THEREWITH; A HAMMER MOUNTED FOR AXIAL AND ROTATIONAL MOVEMENT RELATIVE TO SAID ANVIL; SPRING MEANS CONTINUOUSLY URGING SAID HAMMER TOWARD SAID ANVIL; COMPLEMENTARY, TOOTH-SHAPED HAMMER AND ANVIL CAMS ON SAID HAMMER AND ANVIL, RESPECTIVELY, INCLUDING COOPERATIVE VERTICALLY SLOPING SURFACES TERMINATING IN SUBSTANTIALLY VERTICAL SHOULDERS WHEREBY AS SAID HAMMER ROTATES RELATIVE TO SAID ANVIL, SAID HAMMER CAMS REPEATEDLY RIDE UP ALONG SAID SLOPING SURFACES SAID ANVIL CAMS AND UNDER THE INFLUENCE OF SAID SPRING MEANS DROP HEAVILY ONTO SAID ANVIL CAM UPON LEAVING SAID SLOPING SURFACES AND REACHING SAID SHOULDERS OF SAID ANVIL CAMS; AND COOPERATIVE MEANS CONNECTED TO SAID ANVIL AND HAMMER FOR DIRECTING SAID HAMMER CAMS VERTICALLY DOWNWARD DURING EACH DROP WITH SAID SHOULDERS OF SAID HAMMER CAMS DROPPING ALONG AND IMMEDIATELY ADJACENT SAID SHOULDERS OF SAID ANVIL CAMS TO INSURE A MAXIMUM HAMMER STROKE AND A MAXIMUM HAMMER AND ANVIL IMPACT DURING EACH DROP.
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) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |