Patent US4052802A successfully refreshed from Google Patents.
US4052802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ground-engaging tool with wear-resistant insert
Assignee: Caterpillar Inc
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Filing: 1976-02-23
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Granted: 1977-10-11
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Expires: 1996-02-23
Abstract
Abstract A ground-engaging tool is disclosed which includes a blade with a load carrying front face, a ground-engaging bottom surface, and a rear face, and a wear-resistant insert is secured thereto to extend the service life thereof. The wear-resistant insert includes a back-up plate which is disposed in rearwardly spaced relation from the rear face of the blade and adjacent its bottom surface, a wear-resistant material which is bondably sandwiched between the plate and the rear face, and a plurality of bridging members which extend through the wear-resistant material and are rigidly secured to the plate and the rear face of the blade to minimize in use spalling of the wear-resistant material.
Inventors
- 👤 Lowell J. Moen
- 👤 Eugene L. Helton
- 👤 Chris R. Straesser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:14
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/28; E02F9/2808; E02F9/285; B; B22; B22F; B22F7/00; B22F7/06; B22F7/08; C; C22; C22C; C22C33/00; C22C33/02; C22C33/0207; C22C33/0228; B22F5/00; B22F2005/001
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
115 words
A ground-engaging tool comprising: a blade including a load carrying front face, a ground-engaging bottom surface, and a rear face; and wear-resistant means for extending the wear life of the tool including a back-up plate disposed in rearwardly spaced relation from said rear face and adjacent said bottom surface, a wear-resistant material bondably sandwiched between said plate and said rear face, and a plurality of substantially parallel ribs which extend through said wear-resistant material and are rigidly secured to said plate and said rear face of said blade, said ribs being oriented in vertical planes parallel to a normal direction of linear travel of the tool, to minimize in use spalling of said wear-resistant material.
Claim 2
Dependent Claim
115 words
A ground-engaging tool comprising: a blade including a load carrying front face, a ground-engaging bottom surface, and a rear face; and wear-resistant means for extending the wear life of the tool including a back-up plate disposed in rearwardly spaced relation from said rear face and adjacent said bottom surface, a wear-resistant material bondably sandwiched between said plate and said rear face, and a plurality of substantially parallel ribs which extend through said wear-resistant material and are rigidly secured to said plate and said rear face of said blade, said ribs being oriented in vertical planes parallel to a normal direction of linear travel of the tool, to minimize in use spalling of said wear-resistant material.
Claim 3
Dependent Claim
122 words
A ground-engaging tool comprising: a blade elongated transversely to a normal direction of linear travel of the tool and including a forwardly depending cutting edge portion and a rear face protectingly disposed behind it; and a wear-resistant member secured to said rear face including a back-up plate, a composite wear-resistant material consisting essentially of a plurality of abrasive-resistant particles embedded in a carrying matrix bondably secured spannably to said plate and said rear face, and a plurality of substantially parallel ribs oriented in vertical planes parallel to said normal direction of linear travel of the tool which bridgingly extend through said wear-resistant material and are secured to said plate and said wear-resistant material to minimize in use spalling of said wear-resistant material.
Claim 4
Dependent Claim
122 words
A ground-engaging tool comprising: a blade elongated transversely to a normal direction of linear travel of the tool and including a forwardly depending cutting edge portion and a rear face protectingly disposed behind it; and a wear-resistant member secured to said rear face including a back-up plate, a composite wear-resistant material consisting essentially of a plurality of abrasive-resistant particles embedded in a carrying matrix bondably secured spannably to said plate and said rear face, and a plurality of substantially parallel ribs oriented in vertical planes parallel to said normal direction of linear travel of the tool which bridgingly extend through said wear-resistant material and are secured to said plate and said wear-resistant material to minimize in use spalling of said wear-resistant material.
Claim 5
Dependent Claim
23 words
The ground-engaging tool of claim 2 wherein said blade, said back-up plate and said ribs are made of relatively tough ductile ferrous materials.
Claim 6
Dependent Claim
12 words
The ground-engaging tool of claim 3 wherein said ferrous materials are steel.
Claim 7
Dependent Claim
24 words
The ground-engaging tool of claim 4 wherein said wear-resistant member is secured as a unit to said rear face of said blade by brazing.
Claim 8
Dependent Claim
116 words
A wear-resistant insert for a ground-engaging tool comprising: a back-up plate of low carbon steel with a plurality of projecting members of low carbon steel extending generally normally therefrom; and a composite material including a plurality of abrasive-resistant particles of low carbon ferrous-based alloy material in a carrying matrix of low carbon ferrous-based alloy material different than said material of the particles and being bonded to said back-up plate and to said projecting members and covering said back-up plate between said projecting members to a depth of the projecting members, wherein said back-up plate, said projecting members, said abrasive resistant particles and said matrix are each of a material having less than 0.2% carbon by weight.
Claim 9
Dependent Claim
116 words
A wear-resistant insert for a ground-engaging tool comprising: a back-up plate of low carbon steel with a plurality of projecting members of low carbon steel extending generally normally therefrom; and a composite material including a plurality of abrasive-resistant particles of low carbon ferrous-based alloy material in a carrying matrix of low carbon ferrous-based alloy material different than said material of the particles and being bonded to said back-up plate and to said projecting members and covering said back-up plate between said projecting members to a depth of the projecting members, wherein said back-up plate, said projecting members, said abrasive resistant particles and said matrix are each of a material having less than 0.2% carbon by weight.
Claim 10
Dependent Claim
20 words
The wear-resistant insert of claim 6 wherein said abrasive-resistant particles have hardness values from 1200 to approximately 1600 kg/mm Knoop.
Claim 11
Dependent Claim
26 words
The wear-resistant insert of claim 7 wherein said matrix has a hardness value within a range of from 35 to 45 on the Rockwell "C" scale.
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) | 1980-10-10 | 1981-04-11 | 1981-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-10 | 1985-04-11 | 1985-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-10 | 1989-04-11 | 1989-10-11 | $7700.00 | Window Closed / Lapsed |