US5165304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Assembled shaft
Assignee: Vodafone GmbH
•
Filing: 1991-10-11
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Granted: 1992-11-24
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Expires: 2011-10-11
Abstract
Abstract An assembled shaft, especially a camshaft, gearbox shaft or crankshaft with at least one tubular member and several elements spaced thereon and fixed thereto in a force-locking way by of expansion of same in longitudinal portions, such elements being cams, gears, bearing sleeves or crank webs. The shaft can be made up of a tubular member which, while having an approximately uniform wall thickness, is provided with a reduced diameter in the region between two elements. As a result, when applying a suitable internal pressure to the entire tubular member, the portions with the larger diameter are plastically deformed relative to the drive elements to be fixed, whereas deformation of the tubular portions with the smaller diameter positioned between the drive elements is purely elastic. In an advantageous embodiment, the region between two elements has been provided with sleeves whose diameter is greater than that of the tubular member and whose ends are clamped in between the tubular member in the region with the larger diameter and the elements.
Inventors
- 👤 Helmut Swars
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:04
CPC Classifications
F; F16; F16C; F16C3/00; F16C3/02; F16H; F16H53/00; F16H53/02; F16H53/025; B; B21; B21D; B21D53/00; B21D53/84; B21D53/845; F16C3/023; F16C3/04; F16C3/06; F16C3/10; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2101; Y10T74/2102
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
84 words
An assembled shaft, comprising: a tubular member; several elements spaced thereon and fixed thereto in a force-locking way by expansion of the tubular member in longitudinal portions, the tubular member having an approximately uniform wall thickness and being provided with a reduced diameter in a region between two of the elements; and sleeves between each two elements, the sleeves having an outer diameter greater than that of the tubular member between the elements, the sleeves being clamped between the tubular member and the elements.
Claim 2
Dependent Claim
84 words
An assembled shaft, comprising: a tubular member; several elements spaced thereon and fixed thereto in a force-locking way by expansion of the tubular member in longitudinal portions, the tubular member having an approximately uniform wall thickness and being provided with a reduced diameter in a region between two of the elements; and sleeves between each two elements, the sleeves having an outer diameter greater than that of the tubular member between the elements, the sleeves being clamped between the tubular member and the elements.
Claim 3
Dependent Claim
37 words
An assembled shaft according to claim 1, wherein the tubular member has transition regions from the reduced diameter to a larger diameter below the elements, the transition regions being conical towards the reduced diameter between the elements.
Claim 4
Dependent Claim
37 words
An assembled shaft according to claim 1, wherein the tubular member initially is a tube with a constant diameter, the reduced diameter portions of the tubular member being produced by one of rolling and hammering the tube.
Claim 5
Dependent Claim
23 words
An assembled shaft according to claim 2, wherein the conical transition regions of the tubular member are inwardly drawn and produced by upsetting.
Claim 6
Dependent Claim
19 words
An assembled shaft according to claim 1, wherein the tubular member is composed of portions inserted into each other.
Claim 7
Dependent Claim
23 words
An assembled shaft according to claim 5, wherein the portions are roller-shaped sleeves and thin tubes inserted thereinto and welded or soldered together.
Claim 8
Dependent Claim
19 words
An assembled shaft according to claim 2, wherein the conical transition regions protrude outwardly relative to a respective element.
Claim 9
Dependent Claim
20 words
An assembled shaft according to claim 2, wherein the conical transition regions are pulled inwardly relative to a respective element.
Claim 10
Dependent Claim
35 words
An assembled shaft according to claim 1, wherein the outer diameter of the sleeves is greater in regions positioned axially between the elements than in regions clamped in between the tubular member and the elements.
Claim 11
Dependent Claim
15 words
An assembled shaft according to claim 9, wherein individual sleeves abut centrally underneath each element.
Claim 12
Dependent Claim
15 words
An assembled shaft according to claim 1, wherein the sleeves essentially have a uniform diameter.
Claim 13
Dependent Claim
18 words
An assembled shaft according to claim 11, wherein the sleeves are a single-piece tube which receives several elements.
Claim 14
Dependent Claim
20 words
An assembled shaft according to claim 9, wherein the sleeves are inserted into each other and overlap underneath the elements.
Claim 15
Dependent Claim
30 words
An assembled shaft according to claim 1, wherein the sleeves have a yield point which is higher than that of the tubular member and lower than that of the elements.
Claim 16
Dependent Claim
22 words
An assembled shaft according to claim 1, wherein the assembled shaft is one of a camshaft, a gearbox shaft and a crankshaft.
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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) | 1995-11-24 | 1996-05-25 | 1996-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-24 | 2000-05-25 | 2000-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-24 | 2004-05-25 | 2004-11-24 | $7700.00 | Window Closed / Lapsed |