Patent AT148187B successfully refreshed from Google Patents.
US3973784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting tool adaptor
Assignee: SOLOMON JACK D
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Filing: 1974-07-08
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Granted: 1976-08-10
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Expires: 1994-07-08
Abstract
Abstract An adaptor for a hand-operated power machine tool, such as a power screwdriver, comprises a sleeve adapted to receive a cutting tool bit in the forward end and an aperture for slidably engaging the shank of the screwdriver bit in the rearward end. The sleeve preferably also comprises a concentric bearing-mounted grip allowing free relative motion between the grip and the sleeve. The adaptor is used for performing a series of operations where a guide cutting is first made in a workpiece, and then a screw is driven into the guide hole.
Inventors
- 👤 Donald Awalt Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:26
CPC Classifications
B; B25; B25B; B25B21/00; B25B21/007; B23; B23B; B23B45/00; B23B45/003; Y; Y10; Y10T; Y10T279/00; Y10T279/34; Y10T279/3406; Y10T279/3412; Y10T408/00; Y10T408/94; Y10T408/95; Y10T408/957
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
113 words
An adaptor for rapidly coupling and decoupling a drill attachment to a power driven rotary screwdriver bit, said power screwdriver bit having a shaft of regular polygonal cross-section, said adaptor comprising a sleeve, bit-receiving means for securing a cutting tool bit at the front end of the sleeve, grip means carried by the adaptor for manually maintaining the adaptor on the screwdriver bit, and a cavity at the rear end of the sleeve for slidably engaging the shaft of the power screwdriver bit, the cavity having a regular polygonal cross section and being dimensioned such that when the adaptor is in place, relative rotary motion between the bit and the adaptor is prevented.
Claim 2
Dependent Claim
113 words
An adaptor for rapidly coupling and decoupling a drill attachment to a power driven rotary screwdriver bit, said power screwdriver bit having a shaft of regular polygonal cross-section, said adaptor comprising a sleeve, bit-receiving means for securing a cutting tool bit at the front end of the sleeve, grip means carried by the adaptor for manually maintaining the adaptor on the screwdriver bit, and a cavity at the rear end of the sleeve for slidably engaging the shaft of the power screwdriver bit, the cavity having a regular polygonal cross section and being dimensioned such that when the adaptor is in place, relative rotary motion between the bit and the adaptor is prevented.
Claim 3
Dependent Claim
27 words
The adaptor of claim 1 wherein said grip is located external to and rotatably mounted concentrically to said sleeve for holding the adaptor during the cutting operation.
Claim 4
Dependent Claim
24 words
The adaptor of claim 1 wherein the rotary cutting tool is a drill or countersink, and the rotary work-producing tool is a power screwdriver.
Claim 5
Dependent Claim
23 words
The adaptor of claim 1 wherein the shaft of the bit of the rotary work-producing tool and the elongated cavity have hexagonal cross-sections.
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) | 1979-08-10 | 1980-02-09 | 1980-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-10 | 1984-02-09 | 1984-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-10 | 1988-02-09 | 1988-08-10 | $7700.00 | Window Closed / Lapsed |