US3788286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston engine
Assignee: Individual
•
Filing: 1971-04-02
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Granted: 1974-01-29
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Expires: 1991-04-02
Abstract
Abstract An internal combustion engine having a rotor member journaled in a casing member for rotation about a first axis. A cylinder is provided on one of the members and has a piston received therein which oscilates between extended and retracted positions. The other of the members is provided with a cam surface having high and low extremities and there are means on the piston forcibly engaging the cam surface, the engaging means in the retracted and extended position engaging the high and low cam surface extremities respectively. The engaging means reacts against the cam surface along a force line laterally off-set from the axis of the rotor member and at generally right angles to a plane therethrough, whereby extension of the piston from its retracted to its extended position causes relative rotation of the rotor member with the engaging means moving over the cam surface from its high towards its low extremity and its point of engagement therewith at all rotational positions between the extremities of the cam surface being on the aforementioned force line.
Inventors
- 👤 J Brewer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:10
CPC Classifications
F; F02; F02B; F02B57/00; F02B57/08; F01; F01B; F01B13/00; F01B13/04; F01B13/06; F01B13/068; F02B75/00; F02B75/16; F01B9/00; F01B9/04; F01B9/06; F01B2009/061; F01B2009/063; F02B75/02; F02B2075/022; F02B2075/025; F02B75/18; F02B2075/1804; F02B2075/1808; F02B2075/1816
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
223 words
A reciprocating piston machine comprising a rotor member, means for rotatably supporting said rotor member in a casing member for rotation about an axis of rotation, said rotor having a cylinder formed therein in the shape of a sectoral portion of a hollow cylinder having its axis parallel to said first mentioned axis, the curved portion of said hollow cylinder being disposed on said rotor member radially inwardly of the cylinder axis and outwardly of the axis of said rotor member, the radius of said hollow cylinder being shorter than the radius arm between the axes of said rotor member and hollow cylinder, a piston pivotally secured within said cylinder for oscillatory movement therein about said cylinder axis between retracted and extended positions, and generally elliptically shaped cam surface on the interior of said casing member symmetrically disposed with respect to said first mentioned axis and having high and low extremities, said cylinder being on said rotor member, said piston having means engaging said cam surface, said engaging means in said retracted and extended positions of said piston engaging said high and low cam surface extremities, respectively, said cam surface having a curvature such that extensions of said piston causes relative rotation of said rotor member with said engaging means moving over said cam surface from said high to said low extremities thereof.
Claim 2
Dependent Claim
223 words
A reciprocating piston machine comprising a rotor member, means for rotatably supporting said rotor member in a casing member for rotation about an axis of rotation, said rotor having a cylinder formed therein in the shape of a sectoral portion of a hollow cylinder having its axis parallel to said first mentioned axis, the curved portion of said hollow cylinder being disposed on said rotor member radially inwardly of the cylinder axis and outwardly of the axis of said rotor member, the radius of said hollow cylinder being shorter than the radius arm between the axes of said rotor member and hollow cylinder, a piston pivotally secured within said cylinder for oscillatory movement therein about said cylinder axis between retracted and extended positions, and generally elliptically shaped cam surface on the interior of said casing member symmetrically disposed with respect to said first mentioned axis and having high and low extremities, said cylinder being on said rotor member, said piston having means engaging said cam surface, said engaging means in said retracted and extended positions of said piston engaging said high and low cam surface extremities, respectively, said cam surface having a curvature such that extensions of said piston causes relative rotation of said rotor member with said engaging means moving over said cam surface from said high to said low extremities thereof.
Claim 3
Dependent Claim
61 words
The machine of claim 1 wherein said piston has a cylindrical hub portion disposed coaxially of said axis of said cylinder, an inlet port extending through said hub along a chord thereof and disposed at an angular position wherein said port is opened when said piston is adjacent said extended position and closed when said piston is adjacent said retracted position.
Claim 4
Dependent Claim
167 words
The machine of claim 2 wherein said machine is a two-cycle internal combustion engine, there being at least two of said cylinders, each of said cylinders having an exhaust port for exhausting gas therefrom, said extension of said pistons being the power strokes of said engine, said casing member having the opposite end walls thereof respectively carrying means for rotatably mounting said rotor member, said rotor member having an outer cylindrical surface coaxially of said axis and said end walls having wall portions thereof closely adjacent said cylindrical surface whereby said rotor member cylindrical surface and said cam surfaces between said high extremities thereof define two diametrically opposite outer cavities, said inlet ports respectively communicating with said cavities, said rotor member and at least one of said end walls defining another cavity, said exhaust ports communicating with said other cavity, at least one of said end walls having exhaust openings therein communicating with said other cavity, and means for admitting said air-fuel mixture to said outer cavities.
Claim 5
Dependent Claim
201 words
The machine of claim 1 wherein said machine is a four-cyle internal combustion engine, said cylinder having an inlet-exhaust port for admitting air-fuel mixture thereto and exhausting spent gas therefrom, said casing member having two opposite end walls respectively carrying means rotatably mounting said rotor member, said two end walls having first and second circumferentially spaced arcuate recesses therein, respectively, a passage means in one end wall communicating between said first recess and the atmosphere for exhausting spent gases therefrom, a second passage means in the second end wall for admitting said air-fuel mixture to said second recess, said arcuate recesses and said inlet-exhaust ports being equally radially spaced from said rOtor axis, said arcuate recesses having end portions in registry with said inlet-exhaust port for one rotational position of said rotor whereby exhaust gases exit said inlet-exhaust port into said first recess concurrently with admisstion of air-fuel mixture to said second recess, said inlet-exhaust port also sequentially communicating with said first and second recesses during rotation of said rotor member, and means for exploding an air-fuel mixture in said cylinder for a rotational position of said rotor member in which said port is not registered with either of said recesses.
Claim 6
Dependent Claim
32 words
The machine of claim 4 wherein said cam surface portion between said high and low extremities being formed as substantially a circle generated about an axis offset from said axis of rotation.
Claim 7
Dependent Claim
28 words
The machine of claim 4 in which said exploding means includes a spark plug in one end wall equally radially spaced from said axis at said inlet-exhaust port.
Claim 8
Dependent Claim
69 words
The machine of claim 1, said piston and cylinder having facing surfaces extending generally radially of said rotor member and which define therebetween an explosion chamber, said chamber being disposed radially inward from said cylinder axis, and said piston-engaging means including a roller journalled on said piston for rotation about an axis parallel to said cylinder and rotor member axes, said roller having rolling engagement with said cam surface.
Claim 9
Dependent Claim
56 words
The machine of claim 7 in which said piston in its retracted position has its chamber surface closest to the facing cylinder surface of any of its other positions, portions of said piston when in said retracted position lying on opposite sides of an imaginary line drawn between said rotor member axis and said cylinder axis.
Claim 10
Dependent Claim
69 words
The machine of claim 8 in which said chamber with said piston retracted has an axis that extends generally radially of said rotor member, an imaginary line through said cylinder axis and the point of contact of said roller on said cam surface defining approximately a right angle or greater with respect to the radial axis of said chamber, the last-mentioned angle increasing with extension movement of said piston.
Claim 11
Dependent Claim
62 words
The machine of claim 7 wherein said cylinder includes means for admitting fuel to said explosion chamber and exhausting spent gases therefrom, said casing member including two opposite end members respectively carrying means rotatably mounting said rotor member, means having opposed surfaces that are operatively engageable with said piston and rotor member for defining the opposite sides, respectively, of said explosion chamber.
Claim 12
Dependent Claim
65 words
The machine of claim 7 in which said opposed-surface means includes wall members forming opposite sides of said rotor member, said fuel-admitting means including a passage through said piston and said exhaust gas means includes a passage in one of said wall members so positioned to open into said explosion chamber when said piston is extended and to be closed when said piston is retracted.
Claim 13
Dependent Claim
52 words
The machine of claim 7 in which said opposed-surface means includes wall members forming opposite sides of said rotor member, a passage in one wall member communicating with said explosion chamber when said piston is retracted and said explosion chamber is smallest, said passage constituting part of said fuel-admitting and exhausting means.
Claim 14
Dependent Claim
74 words
The machine of claim 7 in which said opposed-surface means includes wall members forming opposite sides of said rotor member, and including a plurality of said piston and cylinder combinations equally spaced angularly apart on said rotor member, each said piston and cylinder combinations having the aforesaid explosion chmber, sides and means for admitting fuel and exhausting spent gases and the cylinder axes thereof being radially spaced from the axis of said rotor member.
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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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |