US4005906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact or demolition tool
Assignee: Kennametal Inc
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Filing: 1975-12-15
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Granted: 1977-02-01
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Expires: 1995-12-15
Abstract
Abstract An impact or demolition tool consisting of a rod-like steel holder with one end adapted for being gripped by an impact tool while the other end has inserts of hard wear resistant material, such as a cemented hard metal carbide, imbedded therein in distributed relation.
Inventors
- 👤 Robert J. McKenry
- 👤 Michael A. College
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:21
CPC Classifications
B; B25; B25D; B25D17/00; B25D17/02; E; E21; E21B; E21B10/00; E21B10/46; E21B10/56
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
90 words
An impact or demolition tool comprising; a steel rod having a working portion at one end and a portion at the other end adapted for being gripped by a driver, said working portion tapering inwardly on opposite sides toward the outer end to form a wedge, and a flat outer end at the small end of said wedge, and a plurality of hard wear resistant inserts extending into said working portion in spaced distributed relation and having the outer ends disposed for engagement with work being impacted by the tool.
Claim 2
Dependent Claim
90 words
An impact or demolition tool comprising; a steel rod having a working portion at one end and a portion at the other end adapted for being gripped by a driver, said working portion tapering inwardly on opposite sides toward the outer end to form a wedge, and a flat outer end at the small end of said wedge, and a plurality of hard wear resistant inserts extending into said working portion in spaced distributed relation and having the outer ends disposed for engagement with work being impacted by the tool.
Claim 3
Dependent Claim
36 words
An impact or demolition tool according to claim 1 in which the outer ends of said flat end are inclined rearwardly from the plane of the outer end, and inserts in said rearwardly inclined outer ends.
Claim 4
Dependent Claim
19 words
An impact or demolition tool according to claim 1 in which said inserts comprise cemented hard metal carbide material.
Claim 5
Dependent Claim
23 words
An impact or demolition tool according to claim 1 in which said inserts are press fitted into bores provided therefor in said tool.
Claim 6
Dependent Claim
22 words
An impact or demolition tool according to claim 1 in which said inserts are brazed into bores provided therefor in said tool.
References Cited (Backward Citations)
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US3583504A
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US3807804A
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US3858671A
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US3841709A
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US3885638A
Cited
US3915246A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-01 | 1980-08-02 | 1981-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-01 | 1984-08-02 | 1985-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-01 | 1988-08-02 | 1989-02-01 | $7700.00 | Window Closed / Lapsed |