US3704957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cam operated drill unit
Assignee: Individual
•
Filing: 1970-08-17
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Granted: 1972-12-05
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Expires: 1990-08-17
Abstract
Abstract A drill unit adapted for controlled axial advancement of a drill from a retracted position toward a workpiece includes a quill axially movable within a housing. A cam follower operated by a rotatable cam provides reciprocating movement. Linkage between the cam follower and the drill allows the quill to accurately axially advance toward the workpiece and retract. Motor means for rotating the drill at high speed is mounted at the outer end of the drill and is axially movable therewith, the drill being operatively associated with the motor means. Biasing means between the linkage and the quill establish a preselected maximum axial force applicable to the quill by the linkage.
Inventors
- 👤 Robert J Petroff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:14
CPC Classifications
B; B23; B23Q; B23Q5/00; B23Q5/22; B23Q5/32; B23Q5/323; B23Q5/52; Y; Y10; Y10S; Y10S408/00; Y10S408/714; Y10T; Y10T408/00; Y10T408/65; Y10T408/675
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
129 words
A drill unit adapted for controlled precision axial movement of a drill from a retracted position toward a workpiece comprising a housing, a quill mounted within said housing and axially movable with respect thereto, rotatable cam means, drive means for rotating said cam means, cam follower means operated by said cam means for converting the rotational movement of said cam means into reciprocating movement, linkage means between said cam follower means and said quill for axially reciprocating movement of said quill toward and away from the workpiece, biasing means interposed between said linkage means and said quill establishing a preselected maximum axial force applicable to said quill by said linkage means, motor means mounted on said quill and axially movable therewith, and drill holding means on said motor means.
Claim 2
Dependent Claim
129 words
A drill unit adapted for controlled precision axial movement of a drill from a retracted position toward a workpiece comprising a housing, a quill mounted within said housing and axially movable with respect thereto, rotatable cam means, drive means for rotating said cam means, cam follower means operated by said cam means for converting the rotational movement of said cam means into reciprocating movement, linkage means between said cam follower means and said quill for axially reciprocating movement of said quill toward and away from the workpiece, biasing means interposed between said linkage means and said quill establishing a preselected maximum axial force applicable to said quill by said linkage means, motor means mounted on said quill and axially movable therewith, and drill holding means on said motor means.
Claim 3
Dependent Claim
16 words
A drill unit in accordance with claim 1 wherein said biasing means comprises a compressed spring.
Claim 4
Dependent Claim
26 words
A drill unit in accordance with claim 2 wherein the compression of said spring is selectively adjustable so as to establish said preselected maximum axial force.
Claim 5
Dependent Claim
34 words
A drill unit in accordance with claim 3 wherein said drive means comprises a motor, a worm rotatable by said motor and a worm gear rotatable by said worm for rotating said cam means.
Claim 6
Dependent Claim
22 words
A drill unit in accordance with claim 3 wherein said cam means comprises an elliptical cam element eccentrically mounted upon a shaft.
Claim 7
Dependent Claim
31 words
A drill unit in accordance with claim 1 wherein said motor means comprises an air motor, a drive shaft, and drill receiving means on the outer end of said drive shaft.
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) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |