US3704753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ripper shank
Assignee: Individual
•
Filing: 1970-04-29
•
Granted: 1972-12-05
•
Expires: 1990-04-29
Abstract
Abstract A ripper shank having a replaceable earth working tooth and a replaceable wear plate. Improved configurations that afford rapid installation and removal of the wear plate and earth working tooth on the shank. The wear plate and tooth are retained in place by removable cross pins that have retaining shoulders intermediate their ends.
Inventors
- 👤 Hector Bernard Hasforth
- 👤 William H Wolff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:56
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/28; E02F9/2808; E02F9/2816; E02F9/2833; E02F9/2841
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
193 words
In combination with a ripper shank having an earth working tip and a leading edge above the tip, an improved wear plate for protecting said leading edge comprising a rigid body shaped to overlie said leading edge, said body defining a slot for receiving therein said leading edge and having an earth contacting surface opposite said slot, at least one projection projecting from said leading edge, a depression within said slot for receiving said projection, said projection and said depression including means for preventing movement of the wear plate axially of said shank in a direction away from said tip and for permitting movement of the wear plate in an opposite direction, said projection including an apertured web opposite last said means, said wear plate having a portion within said slot for receiving said web, and a cross bore that registers with the web aperture when the wear plate is in place on said leading edge, said cross bore terminating in the exterior surface of said wear plate remote from said earth contacting surface, and a retaining pin extending through said bore and said aperture for retaining said wear plate on said shank.
Claim 2
Dependent Claim
193 words
In combination with a ripper shank having an earth working tip and a leading edge above the tip, an improved wear plate for protecting said leading edge comprising a rigid body shaped to overlie said leading edge, said body defining a slot for receiving therein said leading edge and having an earth contacting surface opposite said slot, at least one projection projecting from said leading edge, a depression within said slot for receiving said projection, said projection and said depression including means for preventing movement of the wear plate axially of said shank in a direction away from said tip and for permitting movement of the wear plate in an opposite direction, said projection including an apertured web opposite last said means, said wear plate having a portion within said slot for receiving said web, and a cross bore that registers with the web aperture when the wear plate is in place on said leading edge, said cross bore terminating in the exterior surface of said wear plate remote from said earth contacting surface, and a retaining pin extending through said bore and said aperture for retaining said wear plate on said shank.
Claim 3
Dependent Claim
42 words
The invention of claim 1 wherein said wear plate includes a front axial extremity, said front axial extremity of said wear plate residing adjacent said tip, said extremity including an earth contacting surface that diverges upward and rearward at an acute angle.
Claim 4
Dependent Claim
66 words
The invention of claim 1 wherein said retaining pin is defined by two substantially identical semicylindric halves and a resilient body disposed between said halves for biasing said halves diametrically outward, said halves each including intermediate the ends thereof a radially outwardly projecting shoulder, said apertured web having an annular depression therein for receiving said shoulders so as to retain said retaining pin in said bore.
References Cited (Backward Citations)
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Cited
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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) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |