Patent US4449122A successfully refreshed from Google Patents.
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US4716638A
Expired / Lapsed
US
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Method for aligning bearing covers at bearing sections of a crankcase
Assignee: Dr Ing HCF Porsche AG
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Filing: 1986-12-18
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Granted: 1988-01-05
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Expires: 2006-12-18
Abstract
Abstract A method for aligning bearing covers at bearing sections of a crankcase in which bearing covers of a crankshaft bearing are aligned by way of fastening bolts and subsequently machined-in fitting pins and wherein the bearing bore for the crankshaft is subsequently machined. Thereafter, the crankshaft is assembled whereby the bearing cover is at first aligned by the fitting pins and is then fixed by means of the fastening bolts. Not only a secure support of the bearing cover at the bearing sections is assured thereby, but also narrow tolerances which favorably influence the bearing support of the crankshaft, can be maintained without problem.
Inventors
- 👤 Herbert Ampferer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:54
CPC Classifications
F; F16; F16C; F16C9/00; F16C9/02; F02; F02F; F02F7/00; F02F7/0043; F02F7/0053; F16M; F16M1/00; F16M1/02; F16M1/021; F16M1/025; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49286; Y10T29/49815; Y10T29/49826; Y10T29/49895
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
146 words
A method for aligning bearing covers at bearing sections of a crankcase and for machining crankshaft bearings formed by the bearing covers and bearing sections, in which the bearing covers cooperate with the bearing sections by way of fitting pins and fastening bolts attached on both sides of the crankshaft, comprising the steps of securing the bearing cover without crankshaft at the bearing sections by means of fastening bolts; machining bores for the fitting pins into the bearing covers and into the bearing sections; installing the fitting pins; machining the bearing bores for the crankshaft which are formed by the bearing covers and the bearing sections; disassembling the bearing cover; and assembling the crankshaft and the bearing cover in such a manner that the bearing covers are at first aligned by way of the fitting pins and are then secured by means of the fastening bolts.
Claim 2
Independent Claim
146 words
A method for aligning bearing covers at bearing sections of a crankcase and for machining crankshaft bearings formed by the bearing covers and bearing sections, in which the bearing covers cooperate with the bearing sections by way of fitting pins and fastening bolts attached on both sides of the crankshaft, comprising the steps of securing the bearing cover without crankshaft at the bearing sections by means of fastening bolts; machining bores for the fitting pins into the bearing covers and into the bearing sections; installing the fitting pins; machining the bearing bores for the crankshaft which are formed by the bearing covers and the bearing sections; disassembling the bearing cover; and assembling the crankshaft and the bearing cover in such a manner that the bearing covers are at first aligned by way of the fitting pins and are then secured by means of the fastening bolts.
Claim 3
Dependent Claim
22 words
A method according to claim 1, wherein the bores for the fitting pins are machined from the side of the bearing covers.
Claim 4
Dependent Claim
19 words
A method according to claim 1, wherein the bores for the fitting pins consist of threaded and conical bores.
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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) | 1991-01-04 | 1991-07-06 | 1992-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-04 | 1995-07-06 | 1996-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-04 | 1999-07-06 | 2000-01-05 | $7700.00 | Window Closed / Lapsed |