US4111166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine mounted exhaust brake
Assignee: Caterpillar Inc
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Filing: 1977-02-07
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Granted: 1978-09-05
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Expires: 1997-02-07
Abstract
Abstract A bolt-on exhaust brake for an internal combustion engine includes a damper movable to open and closed positions, and an air cylinder actuatable to move the damper to its closed position. The damper is openable upon back-pressure reaching 30 psi, so as to avoid damage to the engine.
Inventors
- 👤 Charles E. Alstrin
- 👤 Carl L. McClung
- 👤 James C. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:37
CPC Classifications
F; F02; F02D; F02D9/00; F02D9/04; F02D9/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
132 words
Exhaust brake apparatus for an internal combustion engine including an exhaust line, wherein exhaust back pressure is to be limited to a certain level, comprising a damper movably mounted within said exhaust line, means operable by air pressure for moving said damper to its closed position, the damper having a first planar portion and a smaller second planar portion bent at an obtuse angle from said first planar portion in the direction of flow in the exhaust line, the damper further including a shaft portioned adjacent said second planar portion such that said shaft is offset from the centerline of the exhaust line, so that with a generally operable level of air pressure applied to the means operated by air pressure, the damper opens under a certain level of exhaust back pressure.
Claim 2
Dependent Claim
132 words
Exhaust brake apparatus for an internal combustion engine including an exhaust line, wherein exhaust back pressure is to be limited to a certain level, comprising a damper movably mounted within said exhaust line, means operable by air pressure for moving said damper to its closed position, the damper having a first planar portion and a smaller second planar portion bent at an obtuse angle from said first planar portion in the direction of flow in the exhaust line, the damper further including a shaft portioned adjacent said second planar portion such that said shaft is offset from the centerline of the exhaust line, so that with a generally operable level of air pressure applied to the means operated by air pressure, the damper opens under a certain level of exhaust back pressure.
Claim 3
Dependent Claim
39 words
The apparatus of claim 1 wherein with said damper in the closed position, the first planar portion is provided at an angle to the exhaust line and said second planar portion is provided substantially perpendicular to the exhaust line.
Claim 4
Dependent Claim
16 words
The apparatus of claim 1 wherein the means operable by air pressure comprise air cylinder means.
Claim 5
Dependent Claim
41 words
The apparatus of claim 3 wherein the air cylinder means and damper are such that, with said generally operable level of air pressure applied to the air cylinder means, back pressure in the exhaust line is limited to approximately 30 psi.
References Cited (Backward Citations)
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FR2309363A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |