Patent US3890663A successfully refreshed from Google Patents.
US3890663A
Expired / Lapsed
US
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Method of forming a cotter key hole in a bolt
Assignee: Individual
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Filing: 1974-05-06
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Granted: 1975-06-24
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Expires: 1994-05-06
Abstract
Abstract A method of forming a cotter key hole in a bolt stem. The end of the bolt stem is partially split in a longitudinal direction to form a pair of diverging connected sections. The joint between the sections is cut to provide a transverse groove or recess. The connected sections are then crimped together and the transverse groove provides an opening through the stem to receive the cotter key.
Inventors
- 👤 Matthew J Lebryk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:44
CPC Classifications
B; B23; B23G; B23G9/00; B23G9/001
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
103 words
A method of forming a transverse hole in the shank of a bolt, comprising the steps of longitudinally splitting the end of the bolt shank into two diverging connected sections, said sections being connected at a juncture and each connected section having an inner surface facing the inner surface of the other connected section, inserting a cutting tool longitudinally between the two diverging connected sections and cutting a transverse groove at said juncture, and crimping the two sections together to bring the inner surfaces into contiguous relationship and reform the shank with the groove comprising a transverse hole extending through the reformed shank.
Claim 2
Independent Claim
103 words
A method of forming a transverse hole in the shank of a bolt, comprising the steps of longitudinally splitting the end of the bolt shank into two diverging connected sections, said sections being connected at a juncture and each connected section having an inner surface facing the inner surface of the other connected section, inserting a cutting tool longitudinally between the two diverging connected sections and cutting a transverse groove at said juncture, and crimping the two sections together to bring the inner surfaces into contiguous relationship and reform the shank with the groove comprising a transverse hole extending through the reformed shank.
Claim 3
Dependent Claim
19 words
The method of claim 1 and including the step of threading the external end portion of the reformed shank.
Claim 4
Dependent Claim
16 words
The method of claim 1, wherein the groove is formed by cutting with a saw blade.
Claim 5
Dependent Claim
16 words
The method of claim 1, wherein the end of the shank is split by a chisel.
References Cited (Backward Citations)
US185633A
Cited
US228161A
Cited
US340683A
Cited
US795242A
Cited
US942226A
Cited
US2543063A
Cited
US2674754A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |