Patent US3705750A successfully refreshed from Google Patents.
US3705750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retaining pin and bearing assembly
Assignee: Dresser Industries Inc
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Filing: 1970-11-05
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Granted: 1972-12-12
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Expires: 1990-11-05
Abstract
Abstract An elongated retaining pin having offset end portions allows a bearing assembly to be loosened and easily removed. During operation, the retaining pin is held in position. When the bearing is to be disassembled, the retaining pin is rotated to loosen the bearing assembly.
Inventors
- 👤 Morgan L Crow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:04
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/10; E21B10/22
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
152 words
An improved bearing assembly comprising: a pair of support arms; an outer rolling member positioned between said pair of support arms, said outer rolling member having a central annulus; a bearing shell positioned between said pair of support arms in the annulus of said outer rolling member, said bearing shell having a central annulus; means on said support arms and means on said bearing shell adapted to wedge into tighter interlocking engagement upon relative movement in one direction for stabilizing said bearing shell; bearing means between said outer rolling member and said bearing shell; and a pin positioned between said pair of support arms in the central annulus of said bearing shell, said pin having an elongated main pin body with a central axis and end portions extending from the ends of the main pin body, said end portions having central axes offset from the central axis of said main pin body
Claim 2
Dependent Claim
152 words
An improved bearing assembly comprising: a pair of support arms; an outer rolling member positioned between said pair of support arms, said outer rolling member having a central annulus; a bearing shell positioned between said pair of support arms in the annulus of said outer rolling member, said bearing shell having a central annulus; means on said support arms and means on said bearing shell adapted to wedge into tighter interlocking engagement upon relative movement in one direction for stabilizing said bearing shell; bearing means between said outer rolling member and said bearing shell; and a pin positioned between said pair of support arms in the central annulus of said bearing shell, said pin having an elongated main pin body with a central axis and end portions extending from the ends of the main pin body, said end portions having central axes offset from the central axis of said main pin body
Claim 3
Dependent Claim
21 words
The bearing assembly of claim 1 including means for selectively preventing said pin from rotating with respect to said support arms.
Claim 4
Dependent Claim
21 words
The bearing assembly of claim 2 wherein said pin includes means for allowing rotary torque to be applied to said pin.
Claim 5
Dependent Claim
194 words
An earth boring bit comprising: a main bit body; at least one pair of support arms extending from said main bit body, each support arm having a hole and a recess; a rolling cutter positioned between said pair of support arms, said rolling cutter having a central annulus; a bearing shell positioned between said pair of support arms in the annulus of said rolling cutter, said bearing shell having a central annulus and portions adapted to fit in tapered engagement with said recesses in said support arms thereby wedging into tighter interlocking engagement upon relative movement in one direction; bearing means between said bearing shell and said rolling cutter; a retaining pin with a central axis positioned between said support arms in the annulus of said bearing shell and extending into the holes in said support arms, said retaining pin having an elongated main pin body and end portions, said end portions having a section wherein the distance to the central axis is less than the corresponding distance from the adjacent sections of the body portion to the central axis; and means for selectively preventing said pin from rotating with respect to said saddle.
Claim 6
Dependent Claim
194 words
An earth boring bit comprising: a main bit body; at least one pair of support arms extending from said main bit body, each support arm having a hole and a recess; a rolling cutter positioned between said pair of support arms, said rolling cutter having a central annulus; a bearing shell positioned between said pair of support arms in the annulus of said rolling cutter, said bearing shell having a central annulus and portions adapted to fit in tapered engagement with said recesses in said support arms thereby wedging into tighter interlocking engagement upon relative movement in one direction; bearing means between said bearing shell and said rolling cutter; a retaining pin with a central axis positioned between said support arms in the annulus of said bearing shell and extending into the holes in said support arms, said retaining pin having an elongated main pin body and end portions, said end portions having a section wherein the distance to the central axis is less than the corresponding distance from the adjacent sections of the body portion to the central axis; and means for selectively preventing said pin from rotating with respect to said saddle.
Claim 7
Dependent Claim
19 words
The earth boring bit of claim 4 including means for allowing rotary torque to be applied to said pin.
References Cited (Backward Citations)
US1768577A
Cited
US1791767A
Cited
US1848404A
Cited
US3054466A
Cited
US3203492A
Cited
US3612197A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |