EP0122893A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Excavating tool
Assignee: Santrade Ltd
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Filing: 1984-03-12
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Granted: —
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Expires: 2004-03-12
Abstract
Abstract The invention relates to a tool for breaking or excavating of hard material, such as asphalt. The tool comprises a cutting insert (11) secured to a tool body (10). For purposes of maintaining the required cutting force low while ensuring that the risk is low that the cutting insert (11) will get loose the cutting insert (11) is provided with a concave portion (17) between the tip portion (12) of the cutting insert and a rear shoulder (13) thereon.
Inventors
- 👤 Kenneth Larsson
- 👤 Bert Levefelt
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 18:29
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/56; B; B28; B28D; B28D1/00; B28D1/18; B28D1/186; B28D1/188; E21C; E21C35/00; E21C35/18; E21C35/183; E21C35/1837
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
91 words
A tool for breaking or excavating of hard material, such as asphalt, comprising a tool body (10) and a cutting insert (11) secured thereto, for instance by brazing, wherein the cutting insert (11) is formed with a generally conical tip portion (12) and provided with a shoulder (13) which is intended to rest against a supporting surface (14) on the tool body (10), characterized in that an intermediate portion (17) of the cutting insert (11) located between said tip portion (12) and shoulder (13) comprises a concave portion (17 1 ).
Claim 2
Dependent Claim
91 words
A tool for breaking or excavating of hard material, such as asphalt, comprising a tool body (10) and a cutting insert (11) secured thereto, for instance by brazing, wherein the cutting insert (11) is formed with a generally conical tip portion (12) and provided with a shoulder (13) which is intended to rest against a supporting surface (14) on the tool body (10), characterized in that an intermediate portion (17) of the cutting insert (11) located between said tip portion (12) and shoulder (13) comprises a concave portion (17 1 ).
Claim 3
Dependent Claim
24 words
A tool according to claim 1, wherein the intermediate portion (17) comprises a generally cylindrical portion (1711) located adjacent to the tip portion (12).
Claim 4
Dependent Claim
79 words
A tool according to claim 1 or 2, wherein the distance (a) from the transition (18) between the tip portion (12) and the intermediate portion (17) to the radially outermost portion (19) of a rear contact surface (20) of the shoulder (13) is larger than the distance (b) from said transition (18) to the axially forwardmost portion of the cutting tip (12), said contact surface being adapted to rest against an abutting surface (14) on the tool body (10).
Claim 5
Dependent Claim
52 words
A tool according to claim 3, wherein the smallest diameter (d) of the concave portion (17 1 ) is smaller than the distance (a + b) from the axially forwardmost portion of the tip portion (12) to the radially outermost portion (19) of the rear contact surface (20) of the shoulder (13).
Claim 6
Dependent Claim
22 words
A tool according to any of the preceding claims, wherein the concave portion (17 1 ) has a constant radius of curvature.
References Cited (Backward Citations)
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