US3818746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rod end cold forming process
Assignee: Tokai Rika Co Ltd
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Filing: 1972-07-05
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Granted: 1974-06-25
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Expires: 1992-07-05
Abstract
Abstract Method for forming a rod end having a rod portion and a substantially flat head portion formed at one end of said rod portion, the method comprising a cold forging process including a upsetting step for forming a pair of parallel flat surfaces of small area on parts of said head portion, and a finishing die forming step for forming the head portion into a desired shape.
Inventors
- 👤 K Fujita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:11
CPC Classifications
B; B21; B21J; B21J5/00; B21J5/02; B21K; B21K1/00; B21K1/76; B21K1/762; B21K1/766
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A method of manufacturing a rod end having a head portion and a rod portion comprising: a. first, partially forming said rod portion by extruding a stock rod of larger diameter through a die hole; b. secondly, axially compressing the portion not previously extruded into a die to form said head portion with a pair of semi-cylindrical surfaces which have their diameters approximately perpendicular to the rod axis and at the same time forming a pair of parallel flat surfaces each being parallel to the rod axis; c. thirdly, finishing said head portion by pressing said flat surfaces in a die cavity having a pair of head forming recesses corresponding to the contour of the desired finished shape of said head portion while using said flat surfaces as a reference surface.
Claim 2
Independent Claim
131 words
A method of manufacturing a rod end having a head portion and a rod portion comprising: a. first, partially forming said rod portion by extruding a stock rod of larger diameter through a die hole; b. secondly, axially compressing the portion not previously extruded into a die to form said head portion with a pair of semi-cylindrical surfaces which have their diameters approximately perpendicular to the rod axis and at the same time forming a pair of parallel flat surfaces each being parallel to the rod axis; c. thirdly, finishing said head portion by pressing said flat surfaces in a die cavity having a pair of head forming recesses corresponding to the contour of the desired finished shape of said head portion while using said flat surfaces as a reference surface.
References Cited (Backward Citations)
US633886A
Cited
US1026421A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |