US3984910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-material ripper tip
Assignee: Caterpillar Inc
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Filing: 1975-09-08
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Granted: 1976-10-12
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Expires: 1995-09-08
Abstract
Abstract A multi-material earthworking ripper tip having a leading nose portion comprised of a material having greater wear resistance and strength at elevated temperatures than the material which comprises the rearward shank supporting portion of the tip. In one embodiment, a bi-metallic nose portion is inertial welded to the shank support portion of the tip. In another embodiment powdered tungsten carbide is sintered in situ within a hollow bore of a steel nose portion. Alternately, a solid core of tungsten carbide could be soldered, brazed or press fitted within said hollow bore.
Inventors
- 👤 Eugene L. Helton
- 👤 Walter B. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:36
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/28; E02F9/2808; E02F9/285; B; B22; B22F; B22F7/00; B22F7/06; B22F7/08; B22F5/00; B22F2005/001; Y; Y10; Y10S; Y10S29/00; Y10S29/031; Y10S76/00; Y10S76/11; Y10T; Y10T29/00; Y10T29/49; Y10T29/49718; Y10T29/49746; Y10T29/49826; Y10T29/49908; Y10T29/49938; Y10T29/4998; Y10T29/49993
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
90 words
A method of fabricating a ripper tip having a support portion and a nose portion with a centrally disposed bore therein containing wear resistant core material, said method comprising the steps of: a. placing said core material in said bore in powdered form; b. inserting a rigid member in said powdered material to tightly pack said material within said bore; c. applying heat to said nose portion with said rigid member in place to sinter said material in said bore; and d. attaching said nose portion to said support portion.
Claim 2
Independent Claim
90 words
A method of fabricating a ripper tip having a support portion and a nose portion with a centrally disposed bore therein containing wear resistant core material, said method comprising the steps of: a. placing said core material in said bore in powdered form; b. inserting a rigid member in said powdered material to tightly pack said material within said bore; c. applying heat to said nose portion with said rigid member in place to sinter said material in said bore; and d. attaching said nose portion to said support portion.
Claim 3
Dependent Claim
18 words
The method of claim 1 wherein said nose portion is attached to said support portion by inertia welding.
Claim 4
Dependent Claim
18 words
The method of claim 1 wherein said nose portion is attached to said support portion by friction welding.
References Cited (Backward Citations)
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Cited
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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) | 1979-10-12 | 1980-04-12 | 1980-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-12 | 1984-04-12 | 1984-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-12 | 1988-04-12 | 1988-10-12 | $7700.00 | Window Closed / Lapsed |