US4061123A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine de-compression mechanism
Assignee: Individual
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Filing: 1976-10-15
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Granted: 1977-12-06
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Expires: 1996-10-15
Abstract
Abstract An engine de-compression mechanism in which the valves to one or more of the cylinders are locked in open position to prevent fuel from being drawn into the engine cylinder during the normal intake stroke and to prevent compression back pressure on the piston during the compression stroke. The function of the de-compression mechanism is to put one or more of the cylinders of the engine out of operation to conserve fuel when driving at high speeds.
Inventors
- 👤 Robert W. Janes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:55
CPC Classifications
F; F02; F02D; F02D17/00; F02D17/02; F01; F01L; F01L13/00; F01L13/08; F01L13/0015; F01L2013/0089; F01L2013/0094; F01L2820/00; F01L2820/03; F01L2820/031
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
102 words
A valve deactivator for de-compressing selected cylinders of an internal combustion engine of the type including a cam shaft and valve lifters comprising an annular detent groove formed in the valve lifters, a reciprocatable detent shaft engageable in the groove to lock the valve lifter in valve lifted position thereby removing said lifters from said cam shaft, means for moving said detent shaft from valve lifter unlocking position to valve lifter locking position and back again, and spring means for further disengaging said detent shaft from said groove in said valve lifter upon inaction of the means for moving said detent shaft.
Claim 2
Dependent Claim
102 words
A valve deactivator for de-compressing selected cylinders of an internal combustion engine of the type including a cam shaft and valve lifters comprising an annular detent groove formed in the valve lifters, a reciprocatable detent shaft engageable in the groove to lock the valve lifter in valve lifted position thereby removing said lifters from said cam shaft, means for moving said detent shaft from valve lifter unlocking position to valve lifter locking position and back again, and spring means for further disengaging said detent shaft from said groove in said valve lifter upon inaction of the means for moving said detent shaft.
Claim 3
Dependent Claim
63 words
A device as claimed in claim 1 wherein the means for moving said detent shaft comprises a pair of magnetic coils arranged in spaced apart relation around said shaft, and a magnetizeable collar secured to said shaft intermediate said coils to provide positive fail safe translation of said reciprocatable detent shaft from a naturally disengaged position to a locked position and back again.
Claim 4
Dependent Claim
16 words
A device as claimed in claim 1 wherein the engine is a valve in head engine.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-05 | 1981-06-06 | 1981-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-05 | 1985-06-06 | 1985-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-05 | 1989-06-06 | 1989-12-06 | $7700.00 | Window Closed / Lapsed |