Patent US4584972A successfully refreshed from Google Patents.
US4584972A
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US
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Dynamic compression internal combustion engine with yoke having an offset arcuate slot
Assignee: R P & M ENGINES Inc
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Filing: 1984-12-21
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Granted: 1986-04-29
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Expires: 2004-12-21
Abstract
Abstract An internal combustion engine has a cylinder with a first axis, a piston housing therein and connected to a yoke housing having a sliding block within a slot in the yoke which slot is curved about a center of curvature with the concave side of the slot facing away from the combustion chamber and offset from the vertical axis of the combustion chamber, the curve's radius being such as to provide a power stroke having a time period which exceeds the time period of a compression stroke.
Inventors
- 👤 Michael E. Jayne
- 👤 Peter D. Anderson
- 👤 James T. Hoffman
- 👤 Robert B. Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:31
CPC Classifications
F; F01; F01B; F01B9/00; F01B9/02; F01B9/023; F02; F02B; F02B41/00; F02B41/02; F02B41/04; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F02B2275/00; F02B2275/36; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
178 words
Apparatus for an internal combustion engine having at least one cylinder with a first axis and an attendant crankcase with crankshaft mounted therein for rotation of a throw of the crankshaft, comprising a piston disposed in the cylinder for movement along the first axis, a yoke connected to the piston for movement along the first axis, a sliding block to engage said yoke, the yoke and sliding block comprising means for effecting asymmetrical compression and power stroke time periods having at least a curved surface on said yoke engaging throughout the compression and power stroke time periods a mating surface on the sliding block, said curved and mating surfaces having only a single center of curvature disposed remote from the crankshaft on a side of the crankshaft which faces away from the piston and the curved surface being disposed with respect to the first axis to afford a greater time period for fuel burn during a power stroke than that for a compression stroke, wherein top dead center of said sliding block occurs after that of said piston.
Claim 2
Dependent Claim
178 words
Apparatus for an internal combustion engine having at least one cylinder with a first axis and an attendant crankcase with crankshaft mounted therein for rotation of a throw of the crankshaft, comprising a piston disposed in the cylinder for movement along the first axis, a yoke connected to the piston for movement along the first axis, a sliding block to engage said yoke, the yoke and sliding block comprising means for effecting asymmetrical compression and power stroke time periods having at least a curved surface on said yoke engaging throughout the compression and power stroke time periods a mating surface on the sliding block, said curved and mating surfaces having only a single center of curvature disposed remote from the crankshaft on a side of the crankshaft which faces away from the piston and the curved surface being disposed with respect to the first axis to afford a greater time period for fuel burn during a power stroke than that for a compression stroke, wherein top dead center of said sliding block occurs after that of said piston.
Claim 3
Dependent Claim
26 words
Apparatus for an internal combustion engine in accordance with claim 1, wherein the center of curvature of the curved surface is offset from the first axis.
Claim 4
Dependent Claim
42 words
Apparatus for an internal combustion engine in accordance with claim 1, wherein the center of curvature of the curved surface is offset from the first axis on the side occupied by the sliding block during its power stroke from top dead center.
Claim 5
Dependent Claim
14 words
Apparatus for an internal combustion engine in accordance with claim 1 having multiple cylinders.
Claim 6
Dependent Claim
15 words
Apparatus for an internal combustion engine in accordance with claim 1 having a two-stroke cycle.
Claim 7
Dependent Claim
15 words
Apparatus for an internal combustion engine in accordance with claim 1 having a four-stroke cycle.
Claim 8
Dependent Claim
16 words
Apparatus for an internal combustion engine in accordance with claim 1 constructed for fuel injection operation.
Claim 9
Dependent Claim
121 words
Apparatus for an internal combustion engine having at least one cylinder with a first axis and an attendant crankcase with crankshaft mounted therein for rotation of a throw of the crankshaft, comprising a piston disposed in the cylinder for movement along the first axis, a yoke connected to the piston for movement along the first axis, a sliding block means to engage said yoke in curvilinear movement with respect thereto about only a single center of curvature of the curvilinear movement throughout a power and a compression stroke, the center of curvature being on a side opposite a side facing the piston with respect to the crankshaft, wherein top dead center of the sliding block occurs after that of said piston.
Claim 10
Dependent Claim
121 words
Apparatus for an internal combustion engine having at least one cylinder with a first axis and an attendant crankcase with crankshaft mounted therein for rotation of a throw of the crankshaft, comprising a piston disposed in the cylinder for movement along the first axis, a yoke connected to the piston for movement along the first axis, a sliding block means to engage said yoke in curvilinear movement with respect thereto about only a single center of curvature of the curvilinear movement throughout a power and a compression stroke, the center of curvature being on a side opposite a side facing the piston with respect to the crankshaft, wherein top dead center of the sliding block occurs after that of said piston.
Claim 11
Dependent Claim
26 words
Apparatus for an internal combustion engine in accordance with claim 8, wherein the center of curvature of the curvilinear movement is offset from said first axis.
Claim 12
Dependent Claim
42 words
Apparatus for an internal combustion engine in accordance with claim 8, wherein the center of curvature of the curvilinear movement is offset from the first axis on the side occupied by the sliding block during its power stroke from top dead center.
Claim 13
Dependent Claim
31 words
Apparatus for an internal combustion engine in accordance with claim 8, wherein the center of curvature of the curvilinear movement is positioned to effect a dynamic compression ratio for the engine.
Claim 14
Dependent Claim
98 words
Apparatus for an internal combustion engine having at least one cylinder with a first longitudinal axis and having a piston with attached yoke movable along said axis and comprising, a curvilinear slotted means for effecting a power stroke of a predetermined time period and for effecting a compression stroke of a time period less than said predetermined time period, the curvilinear slotted means having only a single center of curvature on a side opposite a side facing the piston with respect to a crankshaft, wherein top dead center of the sliding block occurs after that of said piston.
Claim 15
Dependent Claim
98 words
Apparatus for an internal combustion engine having at least one cylinder with a first longitudinal axis and having a piston with attached yoke movable along said axis and comprising, a curvilinear slotted means for effecting a power stroke of a predetermined time period and for effecting a compression stroke of a time period less than said predetermined time period, the curvilinear slotted means having only a single center of curvature on a side opposite a side facing the piston with respect to a crankshaft, wherein top dead center of the sliding block occurs after that of said piston.
Claim 16
Dependent Claim
26 words
Apparatus for an internal combustion engine in accordance with claim 12, wherein the center of curvature of the curved surface is offset from the first axis.
Claim 17
Dependent Claim
42 words
Apparatus for an internal combustion engine in accordance with claim 12, wherein the center of curvature of the curved surface is offset from the first axis on the side occupied by the sliding block during its power stroke from top dead center.
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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) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |