US3590469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for machining the stroke bearings and line bearings of a crank shaft
Assignee: Individual
•
Filing: 1969-10-16
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Granted: 1971-07-06
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Expires: 1989-10-16
Abstract
Abstract The line bearings and stroke bearings of a crankshaft are machined consecutively starting with the line bearing adjacent to one end of the crankshaft and proceeding bearing by bearing towards the other end of the crankshaft. In this operation the section of the crankshaft between the bearing in cutting engagement with the tool or tools and the other end of the crankshaft is left radially unsupported and free to undergo any deformation that may result from the removal of stock by the tools, whereas the other section of the crankshaft including the bearing machined in the preceding operation is held by engagement with suitable clamping means. As a result of this method any distortion of the character just explained is eliminated by the subsequent machining operation and the end product is free from any deformation. Therefore, it is no longer necessary, as heretofore, to subject the crankshaft after the roughing operation to a truing and finishing operation before the heat treatment and the grinding.
Inventors
- 👤 Hans Gunther Rohs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:12
CPC Classifications
B; B23; B23B; B23B5/00; B23B5/18; Y; Y10; Y10T; Y10T29/00; Y10T29/17
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
105 words
A method for machining the stroke bearings and the line bearings of a crank shaft comprising the steps of machining said bearings in successive machining operations commencing with the bearing closest to one end of the crankshaft and proceeding bearing by bearing towards the other end of the crankshaft and holding the crankshaft during each succeeding machining operation by engagement with clamping means of such bearing surface as has been machined in the preceding machining operation whereas the bearing surfaces to be machined subsequently and said other end of the crankshaft are left unengaged by clamping or centering means and free to undergo radial deformation.
Claim 2
Independent Claim
105 words
A method for machining the stroke bearings and the line bearings of a crank shaft comprising the steps of machining said bearings in successive machining operations commencing with the bearing closest to one end of the crankshaft and proceeding bearing by bearing towards the other end of the crankshaft and holding the crankshaft during each succeeding machining operation by engagement with clamping means of such bearing surface as has been machined in the preceding machining operation whereas the bearing surfaces to be machined subsequently and said other end of the crankshaft are left unengaged by clamping or centering means and free to undergo radial deformation.
Claim 3
Independent Claim
20 words
A method for machining the stroke bearings and the line bearings of a crank shaft comprising the consecutive steps of
Claim 4
Independent Claim
20 words
A method for machining the stroke bearings and the line bearings of a crank shaft comprising the consecutive steps of
Claim 5
Dependent Claim
53 words
holding the crankshaft by engagement of said line bearing and machining the stroke bearing adjacent to said line bearing, while leaving the section of the crankshaft extending between said stroke bearing and including the other one of said two ends of the crankshaft unsupported and free to undergo deformation in any radial direction;
Claim 6
Dependent Claim
53 words
holding the crankshaft by engagement of said line bearing and machining the stroke bearing adjacent to said line bearing, while leaving the section of the crankshaft extending between said stroke bearing and including the other one of said two ends of the crankshaft unsupported and free to undergo deformation in any radial direction;
Claim 7
Dependent Claim
61 words
holding the crankshaft by engagement of machined bearing surfaces thereof including said stroke bearing with supporting means and machining the next bearing of the crankshaft located adjacent to said stroke bearing, while leaving the section of said crankshaft extending between said next bearing and including said other end of said crankshaft unsupported and free to undergo deformation in any radial direction;
Claim 8
Dependent Claim
61 words
holding the crankshaft by engagement of machined bearing surfaces thereof including said stroke bearing with supporting means and machining the next bearing of the crankshaft located adjacent to said stroke bearing, while leaving the section of said crankshaft extending between said next bearing and including said other end of said crankshaft unsupported and free to undergo deformation in any radial direction;
Claim 9
Dependent Claim
23 words
repeating step No. 3 consecutively with respect to consecutive bearings up to the line bearing adjacent to said other end of said crankshaft.
Claim 10
Dependent Claim
23 words
repeating step No. 3 consecutively with respect to consecutive bearings up to the line bearing adjacent to said other end of said crankshaft.
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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |