Patent US3687226A successfully refreshed from Google Patents.
US3687226A
Expired / Lapsed
US
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Spread center bushing
Assignee: Ingersoll Rand Co
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Filing: 1970-11-30
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Granted: 1972-08-29
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Expires: 1990-11-30
Abstract
Abstract A spread-center bushing with an oscillation type crawler frame for use on track mounted structures. The spread-center bore allows for the shortening of the center distance of a yoke when it pivots about its main pivot point, and the clearance between the outside diameter of the locking pin and the width of the spread-center bore allows for track frame angular movement.
Inventors
- 👤 Francis P Coyne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:04
CPC Classifications
B; B62; B62D; B62D55/00; B62D55/06; B62D55/062
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
90 words
A bushing for an oscillation type track frame-yoke comprising a right circular cylinder outer surface and an oval shaped inner bearing surface adapted to slidably receive an element for rotary movement relative thereto and having a spread-center bore with a horizontal dimension greater than its vertical dimension to permit horizontal displacement and in which the slidably received element is a locking pin for a drilling equipment crawler, and the inner bearing surface is vertically dimensioned to permit angular movement of the locking pin relative to the axis of the bushing.
Claim 2
Dependent Claim
90 words
A bushing for an oscillation type track frame-yoke comprising a right circular cylinder outer surface and an oval shaped inner bearing surface adapted to slidably receive an element for rotary movement relative thereto and having a spread-center bore with a horizontal dimension greater than its vertical dimension to permit horizontal displacement and in which the slidably received element is a locking pin for a drilling equipment crawler, and the inner bearing surface is vertically dimensioned to permit angular movement of the locking pin relative to the axis of the bushing.
Claim 3
Dependent Claim
78 words
The combination of an oscillating yoke with an opening in at least one end, a bushing having an outer surface engaged in said opening and an inner bearing surface adapted to slidably receive an element for rotary movement relative thereto and having a spread center bore with a horizontal dimension greater than its vertical dimension, a clevis, and a locking pin whereby the bushing is captured within the clevis with a predetermined scope of lateral movement relative thereto.
Claim 4
Dependent Claim
78 words
The combination of an oscillating yoke with an opening in at least one end, a bushing having an outer surface engaged in said opening and an inner bearing surface adapted to slidably receive an element for rotary movement relative thereto and having a spread center bore with a horizontal dimension greater than its vertical dimension, a clevis, and a locking pin whereby the bushing is captured within the clevis with a predetermined scope of lateral movement relative thereto.
Claim 5
Dependent Claim
31 words
The combination of claim 2 wherein the inner bearing surface of the bushing is vertically dimensioned to permit angular movement of the locking pin relative to the axis of the bushing.
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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |