US5687683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic decompressor for valve-controlled internal combustion engines
Assignee: Harley Davidson Motor Co Inc
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Filing: 1996-11-12
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Granted: 1997-11-18
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Expires: 2016-11-12
Abstract
Abstract An automatic decompressor for valve-controlled internal combustion engines consists of a decompression lever mounted pivotably on the camshaft and cooperating with a charge changing valve on the internal combustion engine. The decompression lever is mounted on the camshaft in such fashion that its rotational axis runs perpendicularly to the camshaft axis. In order to prevent or minimize oscillating movements caused by the action of gravity, the decompression lever is so designed that its total center of gravity lies on the rotational axis.
Inventors
- 👤 Richard Knoblauch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:39
CPC Classifications
F; F01; F01L; F01L13/00; F01L13/08; F01L13/085
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
108 words
Automatic decompressor for valve-controlled internal combustion engines with at least one camshaft for actuating charge changing valves comprising: a decompression lever cooperating with at least one charge changing valve and having at least two lever arms, which decompression lever is mounted on a rotational axis on the camshaft and is rotatable by centrifugal forces that develop as a result of rotational movement of the camshaft from a first switch position into a second switch position, with a camshaft axis and the rotational axis being approximately perpendicular to one another, wherein the total center of gravity of the decompression lever is located at least approximately on the rotational axis.
Claim 2
Dependent Claim
108 words
Automatic decompressor for valve-controlled internal combustion engines with at least one camshaft for actuating charge changing valves comprising: a decompression lever cooperating with at least one charge changing valve and having at least two lever arms, which decompression lever is mounted on a rotational axis on the camshaft and is rotatable by centrifugal forces that develop as a result of rotational movement of the camshaft from a first switch position into a second switch position, with a camshaft axis and the rotational axis being approximately perpendicular to one another, wherein the total center of gravity of the decompression lever is located at least approximately on the rotational axis.
Claim 3
Dependent Claim
20 words
Automatic decompression device according to claim 1, wherein the decompression lever is designed approximately in the shape of an arch.
Claim 4
Dependent Claim
38 words
Automatic decompressor according to claim 2, wherein the decompression lever is urged against the action of the centrifugal forces by a spring element, the center of gravity of said element being located at least approximately on camshaft axis.
Claim 5
Dependent Claim
18 words
Automatic decompressor according to claim 3, wherein the spring element is a coil spring guided radially in camshaft.
Claim 6
Dependent Claim
40 words
Automatic decompressor according to claim 4, wherein the bisectrix of the pivot area covered by a line connecting individual centers of gravity of the lever arms and the camshaft axis encloses an angle of less than or equal to 45°.
Claim 7
Dependent Claim
39 words
Automatic decompressor according to claim 1, wherein the decompression lever is urged against the action of the centrifugal forces by a spring element, the center of gravity of said element being located at least approximately on the camshaft axis.
Claim 8
Dependent Claim
18 words
Automatic decompressor according to claim 6, wherein the spring element is a coil spring guided radially in camshaft.
Claim 9
Dependent Claim
40 words
Automatic decompressor according to claim 1, wherein the bisectrix of the pivot area covered by a line connecting individual centers of gravity of the lever arms and the camshaft axis encloses an angle of less than or equal to 45°.
Claim 10
Dependent Claim
40 words
Automatic decompressor according to claim 6, wherein the bisectrix of the pivot area covered by a line connecting individual centers of gravity of the lever arms and the camshaft axis encloses an angle of less than or equal to 45°.
References Cited (Backward Citations)
US4453507A
Cited
US5150674A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-11-17 | 2001-05-19 | 2001-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-11-17 | 2005-05-19 | 2005-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-11-17 | 2009-05-19 | 2009-11-18 | $7700.00 | Window Closed / Lapsed |