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US3712753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Universal replaceable drill for marble, metals and wood
Assignee: Individual
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Filing: 1971-07-15
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Granted: 1973-01-23
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Expires: 1991-07-15
Abstract
Abstract The present disclosure relates to a device forming the combination of two replaceable drills. One drill is meant to cut small holes and another for larger holes. Preferably the device in question may be used to cut holes in marble, stone, steel and wood. The invention provides a special design drill to cut the small holes and tool bit to cut the large holes. Both, the drill and the tool, may be readily removeable and replaceable from the device in question by drill or a tool bit of different size and manufacture.
Inventors
- 👤 M Manzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:04
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/10; B23B51/108; Y; Y10; Y10T; Y10T408/00; Y10T408/89; Y10T408/905; Y10T408/906; Y10T408/909; Y10T408/9098; Y10T408/90993; Y10T408/94; Y10T408/95
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
In a device of the class described for drilling holes in marble slabs, including, in combination, two separate drills, one of said drills for drilling holes of smaller diameter and the other of said drills for drilling holes of substantially larger diameter, a drill shank to support said drills, said one of said drills having a forked shaped extension at one end thereof, said other of said drills comprising a flat tool bit with cutting edges, a rectangular slot located in said shank, said flat tool bit fitting snugly within the slot in said shank, said forked extension in said one of said drills saddling the flat tool bit and being anchored within a hole in said shank, and a set screw means to make both the tool bit and said drill tight and fast to said drill shank.
Claim 2
Dependent Claim
139 words
In a device of the class described for drilling holes in marble slabs, including, in combination, two separate drills, one of said drills for drilling holes of smaller diameter and the other of said drills for drilling holes of substantially larger diameter, a drill shank to support said drills, said one of said drills having a forked shaped extension at one end thereof, said other of said drills comprising a flat tool bit with cutting edges, a rectangular slot located in said shank, said flat tool bit fitting snugly within the slot in said shank, said forked extension in said one of said drills saddling the flat tool bit and being anchored within a hole in said shank, and a set screw means to make both the tool bit and said drill tight and fast to said drill shank.
References Cited (Backward Citations)
US2826104A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |