Patent US4254743A successfully refreshed from Google Patents.
US4254743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion engine
Assignee: Individual
•
Filing: 1977-12-27
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Granted: 1981-03-10
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Expires: 1997-12-27
Abstract
Abstract An improved internal combustion engine and method of operation are disclosed. A method and a means are described for conserving mechanical energy in the engine cylinder during the combustion portion of the engine cycle by automatically adjusting the engine cylinder volume.
Inventors
- 👤 Allen F. Reid
- 👤 Albert H. Halff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:22
CPC Classifications
F; F02; F02B; F02B41/00; F02B41/02; F02B41/04; F02B1/00; F02B1/02; F02B1/04; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2142; Y10T74/2162
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
191 words
In an internal combustion engine the improvement comprising means for increasing the volume available to the cylinder gases for driving the engine piston at a given angle of crank rotation beyond the minimum volume position during the combustion in the first part of the power stroke with respect to the volume available to the cylinder gases at a corresponding angle of crank rotation in advance of the minimum volume position in the last part of the compression stroke, said means for increasing the volume comprising a cylindrical sleeve with an off-set center bore coupling the connecting rod to the engine crankshaft, said off-set center bore forming a thinning and then thickening sleeve cross-sectional area, said sleeve including a semi-cylindrical slot, and means postioned on said crankshaft to turn said thickest portion of said sleeve cross-sectional area of said cylindrical sleeve nearest to the cylinder head during the last part of the compression stroke while allowing a combustion force transmitted through the connecting rod to freely rotate the sleeve to position said thinnest portion of said sleeve cross-sectional area closest to the cylinder head during the first part of the power stroke.
Claim 2
Dependent Claim
191 words
In an internal combustion engine the improvement comprising means for increasing the volume available to the cylinder gases for driving the engine piston at a given angle of crank rotation beyond the minimum volume position during the combustion in the first part of the power stroke with respect to the volume available to the cylinder gases at a corresponding angle of crank rotation in advance of the minimum volume position in the last part of the compression stroke, said means for increasing the volume comprising a cylindrical sleeve with an off-set center bore coupling the connecting rod to the engine crankshaft, said off-set center bore forming a thinning and then thickening sleeve cross-sectional area, said sleeve including a semi-cylindrical slot, and means postioned on said crankshaft to turn said thickest portion of said sleeve cross-sectional area of said cylindrical sleeve nearest to the cylinder head during the last part of the compression stroke while allowing a combustion force transmitted through the connecting rod to freely rotate the sleeve to position said thinnest portion of said sleeve cross-sectional area closest to the cylinder head during the first part of the power stroke.
Claim 3
Dependent Claim
17 words
The engine as claimed in claim 1 in which said means on said crankshaft comprises a stud.
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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) | 1984-03-09 | 1984-09-08 | 1985-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-09 | 1988-09-08 | 1989-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-09 | 1992-09-08 | 1993-03-10 | $7700.00 | Window Closed / Lapsed |