Patent US3929296A successfully refreshed from Google Patents.
US3929296A
Expired / Lapsed
US
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Striking tool
Assignee: Individual
•
Filing: 1974-04-05
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Granted: 1975-12-30
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Expires: 1994-04-05
Abstract
Abstract A striking tool for crushing stonelike material, the tool having a double layer, one layer forming the working side and being prone to wear and the other layer forming the rear side being of a material having resistance to bending.
Inventors
- 👤 Hans Stoeber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:01
CPC Classifications
B; B02; B02C; B02C13/00; B02C13/26; B02C13/28; B02C13/2804
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
136 words
A striking tool for an impact and hammer crusher, the tool adapted to be mounted on a rotor supported in a bearing and operable to rotate the tool at high velocity into engagement with stones along a striking circle for crushing same, the tool comprising an impact head formed of a composite material comprising at least a pair of layers of material having an intimately bonded interface, one layer providing a working side of wear-resistant material having a striking edge, the other layer formed of a material resistant to bending and having a low wear resistance, and wherein the upper surface of said other layer substantially recedes relative to the striking edge of the working side at an acute angle relative to a plane tangential to the striking edge and generally normal to the striking circle.
Claim 2
Dependent Claim
136 words
A striking tool for an impact and hammer crusher, the tool adapted to be mounted on a rotor supported in a bearing and operable to rotate the tool at high velocity into engagement with stones along a striking circle for crushing same, the tool comprising an impact head formed of a composite material comprising at least a pair of layers of material having an intimately bonded interface, one layer providing a working side of wear-resistant material having a striking edge, the other layer formed of a material resistant to bending and having a low wear resistance, and wherein the upper surface of said other layer substantially recedes relative to the striking edge of the working side at an acute angle relative to a plane tangential to the striking edge and generally normal to the striking circle.
Claim 3
Dependent Claim
38 words
The tool as claimed in claim 1 in which the working side and said other side define a body wherein resistance to bending in every point of its cross section remains generally constant in every stage of wear.
Claim 4
Dependent Claim
48 words
The tool as claimed in claim 1 in which the thickness of the wear-resistant material providing the striking edge remains a generally equal distance from the interface between the two layers, as determined by planes generally normally intersecting the striking circle, with progressive wear of the striking tool.
References Cited (Backward Citations)
US1630021A
Cited
US3608841A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |