Patent US4840150A successfully refreshed from Google Patents.
US4840150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve-actuating lever for internal combustion engines
Assignee: Daimler Benz AG
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Filing: 1988-05-12
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Granted: 1989-06-20
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Expires: 2008-05-12
Abstract
Abstract A valve-actuating lever for internal combustion engines with a slide member disposed in a rectangular groove which is form-lockingly retained at the lever member by at least two strips within the area of the forward and rear edge in relation to the direction of rotation of the cam shaft, whereby the lever member is provided with undercuts within the area of the rectangular groove; the strips thereby consist of fiber-reinforced plastic material with a temperature resistance of at least 150° C. and form-lockingly surround the undercuts of the lever member as well as the forward and rear edge of the slide body in relation to the direction of rotation. It is preferred if the strips are constructed as closed frame.
Inventors
- 👤 Werner Kotzab
- 👤 Horst Zielke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:20
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/12; F01L1/18; F01L1/185
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
180 words
A valve-actuated lever, comprising slide means disposed in a rectangular groove of a lever means, the slide means being form-lockingly retained in the lever means by at least two strip means within the area of forward and rear edges of the slide means, the forward and rear edges being formed relative to the central axis of a cam shaft, the lever means being provided with projections within the area of the rectangular groove, the slide means having a pair of recesses, the respective recesses being formed in the forward and rear edges of the slide means and adjacent to forward and rear edges of the groove, wherein the strip means are at least equal in length to the respective recesses, and project into cavities formed in the lever means beneath the respective forward and rear edges of the groove, and the strip means include at least one of a fiber-reinforced plastic material, ceramic-powder containing plastic material and glass microballs containing material, each with a temperature resistance of at least 150° and form-lockingly filling the pair of recesses and respective cavities.
Claim 2
Dependent Claim
180 words
A valve-actuated lever, comprising slide means disposed in a rectangular groove of a lever means, the slide means being form-lockingly retained in the lever means by at least two strip means within the area of forward and rear edges of the slide means, the forward and rear edges being formed relative to the central axis of a cam shaft, the lever means being provided with projections within the area of the rectangular groove, the slide means having a pair of recesses, the respective recesses being formed in the forward and rear edges of the slide means and adjacent to forward and rear edges of the groove, wherein the strip means are at least equal in length to the respective recesses, and project into cavities formed in the lever means beneath the respective forward and rear edges of the groove, and the strip means include at least one of a fiber-reinforced plastic material, ceramic-powder containing plastic material and glass microballs containing material, each with a temperature resistance of at least 150° and form-lockingly filling the pair of recesses and respective cavities.
Claim 3
Dependent Claim
26 words
A valve-actuating lever according to claim 1, wherein the rectangular groove is contructed cup-like with the edges of the projections protruding out of the lever means.
Claim 4
Dependent Claim
26 words
A valve-actuating lever according to claim 1, wherein the projections of the lever means are provided with undercuts at the inside walls of the rectangular groove.
Claim 5
Dependent Claim
16 words
A valve-actuating lever according to claim 2, wherein the strip means are constructed as closed frame.
Claim 6
Dependent Claim
16 words
A valve-actuating lever according to claim 1, wherein the strip means are constructed as closed frame.
References Cited (Backward Citations)
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Cited
US4624223A
Cited
US4738231A
Cited
US4438738A
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US4672927A
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US4643144A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-19 | 1992-12-19 | 1993-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-19 | 1996-12-19 | 1997-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-19 | 2000-12-19 | 2001-06-20 | $7700.00 | Window Closed / Lapsed |