US4022167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine and operating cycle
Assignee: Individual
•
Filing: 1975-02-04
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Granted: 1977-05-10
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Expires: 1995-02-04
Abstract
Abstract A pair of cylindrical rotors are mounted for rotation within a stator and each rotor including a plurality of cylindrical bores annularly around the axis thereof and parallel to the stator bore. Pistons reciprocate within these bores and connecting rods or links of the pistons engage within the profile of a pair of annular cams secured to the stator at opposite ends thereof so that as the rotors rotate, the pistons reciprocate due to the cam profile. By providing a set of pistons and cylinders, on each side of a central common cylinder head at each end, a pair of rotors and a pair of cams one at each end of the stator, balance is achieved. A common combustion chamber is provided in the cylinder head for the pistons on the opposite sides of the cylinder head. The cycle can be of a diesel type with a fuel injection or of the gasoline/air mixture type with conventional spark plugs. Of importance, is the ease with which the expansion ratio can be made greater than the compression ratio thus utilizing more of the energy normally expelled and wasted in exhaust gases with the conventional cycles. Furthermore, timing is easily adjusted by rotating the cams and the compression ratio can be varied by moving the two cams further apart or closer together.
Inventors
- 👤 Haakon Henrik Kristiansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:34
CPC Classifications
F; F02; F02B; F02B41/00; F02B41/02; F02B41/04; F01; F01B; F01B3/00; F01B3/0032; F01B3/0035; F01B3/04; F01B3/045; F02B57/00; F02B75/00; F02B75/26; F02B1/00; F02B1/02; F02B1/04; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
350 words
An internal combustion engine comprising, in combination, a hollow cylindrical stator including bearing plates located at each end thereof and a common cylinder head located intermediate the ends thereof to thereby define a first and second cylindrical chambers therein; ignition means located in said cylinder head; fuel and air inlet means and exhaust means located in said common cylinder head; first and second rotor members respectively disposed within said first and second stator chambers; means for journalling said rotors for rotation within the respective stator chambers; a cam ring for each said rotor mounted at one end of each of said stator chambers; said rotor means each comprising means defining a plurality of cylindrical bores having the axes thereof parallel to the axis of that rotor and disposed annularly around the axis of that rotor; a piston disposed for reciprocal motion in each of said bores of each of said rotors; means for operatively connecting said pistons of each rotor to the profile of the respective cam ring such that rotation of said rotors causes rotation of said connecting means around said cam ring profile to thereby control the reciprocal motion of said pistons within said bores; and a common combustion chamber formed in said common cylinder head so as to brought into operative axial alignment with successive ones of the bores in both of said rotors during the rotation of said rotors, said common combustion chamber extending through said cylinder head with the axis thereof parallel to the axes of said rotors to provide direct permanent communication from one side thereof to the other and communicating with opposing bores of said rotors when brought to axial alignment therewith so as to provide simultaneous, common combustion between the pistons of said opposing bores, said common combustion chamber being operatively connected to said ignition means and being of such radial extent as to at least intermittently overlap two adjacent bores during rotation of said rotor thereby providing continuous combustion said air inlet means and said exhaust means being sequentially and operatively connected to said opposing bores from said common cylinder head.
Claim 2
Dependent Claim
350 words
An internal combustion engine comprising, in combination, a hollow cylindrical stator including bearing plates located at each end thereof and a common cylinder head located intermediate the ends thereof to thereby define a first and second cylindrical chambers therein; ignition means located in said cylinder head; fuel and air inlet means and exhaust means located in said common cylinder head; first and second rotor members respectively disposed within said first and second stator chambers; means for journalling said rotors for rotation within the respective stator chambers; a cam ring for each said rotor mounted at one end of each of said stator chambers; said rotor means each comprising means defining a plurality of cylindrical bores having the axes thereof parallel to the axis of that rotor and disposed annularly around the axis of that rotor; a piston disposed for reciprocal motion in each of said bores of each of said rotors; means for operatively connecting said pistons of each rotor to the profile of the respective cam ring such that rotation of said rotors causes rotation of said connecting means around said cam ring profile to thereby control the reciprocal motion of said pistons within said bores; and a common combustion chamber formed in said common cylinder head so as to brought into operative axial alignment with successive ones of the bores in both of said rotors during the rotation of said rotors, said common combustion chamber extending through said cylinder head with the axis thereof parallel to the axes of said rotors to provide direct permanent communication from one side thereof to the other and communicating with opposing bores of said rotors when brought to axial alignment therewith so as to provide simultaneous, common combustion between the pistons of said opposing bores, said common combustion chamber being operatively connected to said ignition means and being of such radial extent as to at least intermittently overlap two adjacent bores during rotation of said rotor thereby providing continuous combustion said air inlet means and said exhaust means being sequentially and operatively connected to said opposing bores from said common cylinder head.
Claim 3
Dependent Claim
49 words
The engine according to claim 1 in which the engagement of said means connecting said pistons with the profile of said cam rings provides, in 360° of travel of said rotor, an intake stroke, a compression stroke, an expansion stroke, and an exhaust stroke for each of said pistons.
Claim 4
Dependent Claim
33 words
The engine according to claim 2 in which said cam profile is such that the expansion and exhaust strokes of each of said pistons are longer than the intake and compression strokes thereof.
Claim 5
Dependent Claim
33 words
The engine according to claim 1 in which said cam profile is such that the expansion and exhaust strokes of each of said pistons are longer than the intake and compression strokes thereof.
Claim 6
Dependent Claim
35 words
The engine according to claim 1 further comprising means to rotate said cam rings, within limits, relative to said stator thereby advancing or retarding top dead center of said pistons relative to said ignition means.
Claim 7
Dependent Claim
309 words
An internal combustion engine; comprising, in combination, a hollow cylindrical stator including bearing plates located at each end thereof and a common cylinder head located intermediate the ends thereof to thereby define a first and second cylindrical chambers therein, ignition means located in said cylinder head, fuel and air inlet means and exhaust means located in said common cylinder head, first and second cylindrical rotors respectively disposed within said first and second stator chambers, means for journalling said rotors for rotation within the respective stator chambers, a cam ring for each said rotor mounted at one end of each of said stator chambers, a plurality of cylindrical bores formed in each said rotor with axes thereof parallel to the axis of that rotor and disposed annularly around the axis of that rotor, a piston disposed for reciprocal motion in each of said bores of each of said rotors, and means for operatively connecting said pistons of each rotor to the profile of the respective cam ring whereby rotation of said rotors causes rotation of said connecting means around said cam ring profile to thereby control the reciprocal motion of said piston within said bores, and a common combustion chamber formed in said common cylinder head so as to be brought into operative axial alignment with successive ones of the bores in each of said rotors during the rotation of said rotors, said common combustion chamber extending axially through said cylinder head to provide direct, permanent connection from one side to the other and communicating with opposing bores of said rotors when brought to axial alignment therewith so to provide simultaneous, common combustion between the pistons of said opposing bores and being operatively connected to said ignition means said air inlet means and said exhaust means being sequentially and operatively connected to said opposing bores from said common cylinder head.
Claim 8
Dependent Claim
309 words
An internal combustion engine; comprising, in combination, a hollow cylindrical stator including bearing plates located at each end thereof and a common cylinder head located intermediate the ends thereof to thereby define a first and second cylindrical chambers therein, ignition means located in said cylinder head, fuel and air inlet means and exhaust means located in said common cylinder head, first and second cylindrical rotors respectively disposed within said first and second stator chambers, means for journalling said rotors for rotation within the respective stator chambers, a cam ring for each said rotor mounted at one end of each of said stator chambers, a plurality of cylindrical bores formed in each said rotor with axes thereof parallel to the axis of that rotor and disposed annularly around the axis of that rotor, a piston disposed for reciprocal motion in each of said bores of each of said rotors, and means for operatively connecting said pistons of each rotor to the profile of the respective cam ring whereby rotation of said rotors causes rotation of said connecting means around said cam ring profile to thereby control the reciprocal motion of said piston within said bores, and a common combustion chamber formed in said common cylinder head so as to be brought into operative axial alignment with successive ones of the bores in each of said rotors during the rotation of said rotors, said common combustion chamber extending axially through said cylinder head to provide direct, permanent connection from one side to the other and communicating with opposing bores of said rotors when brought to axial alignment therewith so to provide simultaneous, common combustion between the pistons of said opposing bores and being operatively connected to said ignition means said air inlet means and said exhaust means being sequentially and operatively connected to said opposing bores from said common cylinder head.
Claim 9
Dependent Claim
185 words
The engine according to claim 6 in which said means connecting said pistons to said profile of said cam ring includes connecting rod means connected by one end thereof to said piston, and means for connecting the other end of said connecting rod means to said cam ring profile, said means for connecting said other end of said connecting rod means to said cam ring profile including said cam ring, said cam ring being of U-shaped cross section and including a base portion and a pair of spaced and parallel leg portions extending at right angles from said base portion, annular channels being formed on the inner surfaces of said leg portions, the side walls of said channels comprising bearing surfaces, first roller means being secured upon each side of said other end, and engaging one of said side walls, second roller means rolling in said annular channel and engaging the other of said side walls whereby said first and second roller means retain said other end of said connecting rod means in rolling engagement within said channels, said channels forming said cam ring profile.
Claim 10
Dependent Claim
168 words
The engine according to claim 6 in which said means connecting said pistons to said profile of said cam ring includes connecting rod means connected by one end thereof to said piston, and means for connecting the other end of said connecting rod means to said cam ring profile, said means for connecting said other end of said connecting rod means to said cam ring profile including said cam ring, said cam ring being of T-shaped cross section and including a web portion and a flange extending at right angles on each side of one edge of said web portion, a bifurcated end being formed on said other end of said connecting rod, first roller means being journalled within said bifurcated end and engaging the outer surface of said flanges, a pair of second roller means being journalled within said bifurcated end of said connecting rod spaced from said first roller means and engaging the inner surface of said flanges, one upon each side of said web portion.
Claim 11
Dependent Claim
33 words
The engine according to claim 6 in which said cam profile is such that the expansion and exhaust strokes of each of said pistons are longer than the intake and compression strokes thereof.
Claim 12
Dependent Claim
49 words
The engine according to claim 6 in which the engagement of said means connecting said pistons with the profile of said cam rings provides, in 360° of travel of said rotor, an intake stroke, a compression stroke, an expansion stroke, and an exhaust stroke for each of said pistons.
Claim 13
Dependent Claim
33 words
The engine according to claim 10 in which said cam profile is such that the expansion and exhaust strokes of each of said pistons are longer than the intake and compression strokes thereof.
Claim 14
Dependent Claim
21 words
The engine according to claim 6 which includes means to control the timing of the strokes of said pistons within limits.
Claim 15
Dependent Claim
40 words
The engine according to claim 12 in which said means includes timing control means to rotate said cam rings, within limits, relative to said stator thereby advancing or retarding top dead center of said pistons relative to said ignition means.
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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) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |