Patent US3792725A successfully refreshed from Google Patents.
US3792725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hammer
Assignee: Stanley Works
•
Filing: 1972-11-17
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Granted: 1974-02-19
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Expires: 1992-11-17
Abstract
Abstract A new and improved interconnection is provided between the striking element and handle of a percussive tool. The striking element is provided with an eye having side walls converging from both ends thereof to provide a portion of reduced cross section located at the axis of percussion of the tool and the tool handle is of generally rectangular cross section with its corners tangentially and frictionally engaging the portion of reduced cross section to provide an interference fit therewith. The interconnection permits adjustable positioning of the head relative to the handle for achieving a balanced angular relationship between the striking face of the head and the handle of the tool. A suitable impact resistent resin fills the cavity between the handle and the side walls of the eye to form a sleeve extending continuously along the length of the aperture on each side of the handle, but gradually increasing in thickness toward both ends of the eye.
Inventors
- 👤 O Burgeson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:16
CPC Classifications
B; B25; B25G; B25G3/00; B25G3/34; B25G3/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
174 words
A hand tool for percussive use comprising a tool head having a striking surface, an axis of percussion extending through said head from said surface and an aperture spaced from said striking surface and extending entirely through said head in a direction normal to said axis of percussion; said aperture having side walls converging from both ends thereof to provide a portion of reduced cross section having a generally arcuate cross sectional configuration intermediate the ends of said aperture; a handle having a grip end and an opposite end positioned in said aperture a sufficient distance to traverse said portion of reduced cross section, said handle being of rectilinear cross section and having corners tangentially and frictionally engaging said portion of reduced cross section to facilitate balanced positioning of the handle relative to said striking surface; and a plastic sleeve extending continuously along the length of the aperture on each side of the handle and gradually increasing in thickness toward both ends of said aperture to fixedly stabilize said handle within said tool head.
Claim 2
Dependent Claim
174 words
A hand tool for percussive use comprising a tool head having a striking surface, an axis of percussion extending through said head from said surface and an aperture spaced from said striking surface and extending entirely through said head in a direction normal to said axis of percussion; said aperture having side walls converging from both ends thereof to provide a portion of reduced cross section having a generally arcuate cross sectional configuration intermediate the ends of said aperture; a handle having a grip end and an opposite end positioned in said aperture a sufficient distance to traverse said portion of reduced cross section, said handle being of rectilinear cross section and having corners tangentially and frictionally engaging said portion of reduced cross section to facilitate balanced positioning of the handle relative to said striking surface; and a plastic sleeve extending continuously along the length of the aperture on each side of the handle and gradually increasing in thickness toward both ends of said aperture to fixedly stabilize said handle within said tool head.
Claim 3
Dependent Claim
59 words
The hand tool of claim 1 wherein the aperture''s portion of reduced cross section is generally elliptical, the handle being of generally rectangular cross section and the corners of the handle providing an interference fit with said portion of reduced cross section, the handle being free of direct contact with the tool head at both ends of said aperture.
Claim 4
Dependent Claim
24 words
The hand tool of claim 1 wherein said portion of reduced cross section is located within a plane passing through said axis of percussion.
Claim 5
Dependent Claim
25 words
The hand tool of claim 1 wherein the portion of the handle within the aperture is of substantially uniform cross section along its entire length.
Claim 6
Dependent Claim
31 words
The hand tool of claim 1 wherein the direct contact between the handle and the tool head occurs at spaced points within a transverse plane passing through said axis of percussion.
Claim 7
Dependent Claim
24 words
The handle tool of claim 1 wherein the handle is a fiber reinforced shaft, said grip end being enclosed within a cushion grip member.
Claim 8
Dependent Claim
34 words
The hand tool of claim 1 wherein the plastic sleeve is formed of impact-resistent resin and fully conforms to the handle and the walls of the aperture to firmly bond the handle in position.
Claim 9
Dependent Claim
16 words
The hand tool of claim 1 wherein the plastic sleeve is formed from an epoxy resin.
References Cited (Backward Citations)
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US2067751A
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US2656225A
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US3578825A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |