Patent US4253353A successfully refreshed from Google Patents.
US4253353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact wrench for hexagonal nuts
Assignee: Individual
•
Filing: 1979-08-31
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Granted: 1981-03-03
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Expires: 1999-08-31
Abstract
Abstract An impact wrench for hexagonal nuts including a unitary metal plate having a central hexagonally shaped aperture and six equally peripherally spaced notches, each having an impact surface coplanar with successive sides of the nut.
Inventors
- 👤 Paul P. Symbol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:35
CPC Classifications
B; B25; B25B; B25B19/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
99 words
An impact wrench for a specific size hexagonal nut comprising a unitary metal plate having a thickness of said nut, said plate having a hexagonally shaped central aperture extending therethrough so as to ensleeve said nut, said plate being equipped with notches on the periphery thereof to provide six equally peripherally spaced impact surfaces of a size adapted to be struck by a hammer and said surfaces in succession being generally coplanar with successive sides of said nut, each notch being defined by a second surface parallel with the side of said nut adjacent to the first mentioned side.
Claim 2
Dependent Claim
99 words
An impact wrench for a specific size hexagonal nut comprising a unitary metal plate having a thickness of said nut, said plate having a hexagonally shaped central aperture extending therethrough so as to ensleeve said nut, said plate being equipped with notches on the periphery thereof to provide six equally peripherally spaced impact surfaces of a size adapted to be struck by a hammer and said surfaces in succession being generally coplanar with successive sides of said nut, each notch being defined by a second surface parallel with the side of said nut adjacent to the first mentioned side.
Claim 3
Dependent Claim
23 words
The structure of claim 1 in which said aperture is equipped with a stress-relief recess at each corner of the hexagonal shape thereof.
Claim 4
Dependent Claim
22 words
The structure of claim 1 in which each of said impact surfaces has a length of at least about 1" (25 mm.).
Claim 5
Dependent Claim
14 words
The structure of claim 3 in which said length is about 11/2" (37 mm.).
Claim 6
Dependent Claim
90 words
An impact wrench for a specific size hexagonal nut comprising a unitary metal plate having a central aperture contoured to said nut, the periphery of said plate being equipped with six equally spaced apart V-shaped notches, each notch being defined by two intersecting surfaces wherein a first surface of each notch extends coplanar to a side of said nut and the second surface extends parallel to a side of said nut adjacent to the first mentioned side, the first surfaces in succession being coplanar with successive sides of said nut.
Claim 7
Dependent Claim
90 words
An impact wrench for a specific size hexagonal nut comprising a unitary metal plate having a central aperture contoured to said nut, the periphery of said plate being equipped with six equally spaced apart V-shaped notches, each notch being defined by two intersecting surfaces wherein a first surface of each notch extends coplanar to a side of said nut and the second surface extends parallel to a side of said nut adjacent to the first mentioned side, the first surfaces in succession being coplanar with successive sides of said nut.
Claim 8
Dependent Claim
30 words
The structure of claim 5 in which said central aperture at the corners defined by the hexagonal contour thereof is equipped with cylindrical recesses to provide stress relief against fracture.
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) | 1984-03-02 | 1984-09-01 | 1985-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-02 | 1988-09-01 | 1989-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-02 | 1992-09-01 | 1993-03-03 | $7700.00 | Window Closed / Lapsed |