US3687564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple drill head
Assignee: Individual
•
Filing: 1970-09-14
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Granted: 1972-08-29
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Expires: 1990-09-14
Abstract
Abstract A drill comprising an integral drill blade, crank and spindle and a multiple drill head for rotating a plurality of such drills.
Inventors
- 👤 John A Cupler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:34
CPC Classifications
B; B23; B23B; B23B39/00; B23B39/16; B23B39/161; B23B39/163; Y; Y10; Y10T; Y10T408/00; Y10T408/36; Y10T408/38; Y10T408/3817; Y10T408/89; Y10T408/907; Y10T74/00; Y10T74/18; Y10T74/1836
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
100 words
A multiple tool head, comprising; a tool bearing plate having multiple tool spindle receiving openings therein; a tool journalled for rotation in each of at least a plurality of said multiple openings; each said tool comprising an integral cutting bit, crank and spindle the diameter of which does not exceed that of said tool spindle receiving openings; a crank operator removably mounted on said tool head in driving engagement with the crank of each said tool; said crank operator and each tool crank including coacting camming means for automatically effecting said driving engagement; and means for rotating said crank operator.
Claim 2
Dependent Claim
100 words
A multiple tool head, comprising; a tool bearing plate having multiple tool spindle receiving openings therein; a tool journalled for rotation in each of at least a plurality of said multiple openings; each said tool comprising an integral cutting bit, crank and spindle the diameter of which does not exceed that of said tool spindle receiving openings; a crank operator removably mounted on said tool head in driving engagement with the crank of each said tool; said crank operator and each tool crank including coacting camming means for automatically effecting said driving engagement; and means for rotating said crank operator.
Claim 3
Dependent Claim
52 words
The tool head of claim 1 wherein said crank operator includes a plurality of bores overlying said tool spindle receiving openings, means for aligning the axes of said bores and openings, and said coacting camming means comprising flared camming surfaces surrounding each said bore and an apical portion on said tool crank.
Claim 4
Dependent Claim
58 words
The tool head of claim 2 wherein said crank and said spindle are of a common diameter, said crank being offset from said spindle by a distance substantially equal to one diameter and said flared camming surfaces comprising a frustrum of a cone diverging toward the tool and having a maximum diameter in excess of the common diameter.
Claim 5
Dependent Claim
16 words
The device of claim 1 wherein the spindle diameter is not greater than about 0.04 inches.
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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |