US4847963A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Camshaft manufacture
Assignee: Timken US LLC
•
Filing: 1989-02-06
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Granted: 1989-07-18
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Expires: 2009-02-06
Abstract
Abstract Individually produced cams and journals are fastened to a hollow tube to form a camshaft by outwordly deforming the tube with a lost mandrel which is left in the tube to form a seal.
Inventors
- 👤 John A. Bendoraitas
- 👤 Jeffrey A. Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:36
CPC Classifications
F; F16; F16H; F16H53/00; F16H53/02; F16H53/025; F01; F01L; F01L1/00; F01L1/02; F01L1/04; F01L1/047; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49293; Y10T29/49826; Y10T29/49908; Y10T29/49938; Y10T29/4994; Y10T29/49945
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
157 words
A method of making a camshaft assembly comprising: providing a plurality of cam and journal elements, each including an axial opening having a generally circular shape with axially extending grooves; positioning said elements in a predetermined phase and axial spacing orientation with said openings aligned on a common axis; inserting a hollow tube into said elements in close fitting relation with said openings; providing a forming plug having a shape complementary with the shape of said ground openings and an average diameter larger than the tube inner diameter; forcing said forming plug through said tube to a predetermined position to outwardly deform the tube wall; expanding the hollow tube into mechanical interference engagement with all of the element openings so as to secure the elements permanently onto the tube in said predetermined orientation; and plugging said hollow tube by leaving said forming plug in tight mechanical interference engagement with the tube inner diameter at said predetermined position.
Claim 2
Independent Claim
157 words
A method of making a camshaft assembly comprising: providing a plurality of cam and journal elements, each including an axial opening having a generally circular shape with axially extending grooves; positioning said elements in a predetermined phase and axial spacing orientation with said openings aligned on a common axis; inserting a hollow tube into said elements in close fitting relation with said openings; providing a forming plug having a shape complementary with the shape of said ground openings and an average diameter larger than the tube inner diameter; forcing said forming plug through said tube to a predetermined position to outwardly deform the tube wall; expanding the hollow tube into mechanical interference engagement with all of the element openings so as to secure the elements permanently onto the tube in said predetermined orientation; and plugging said hollow tube by leaving said forming plug in tight mechanical interference engagement with the tube inner diameter at said predetermined position.
Claim 3
Dependent Claim
29 words
The method as in claim 1 wherein said forcing is caused by an assembly machine member which can be readily withdrawn after the forming plug reaches the predetermine position.
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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) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-17 | 2001-01-16 | 2001-07-18 | $7700.00 | Window Closed / Lapsed |