WO1987003042A1 - Orbital engine with radial cylinders - Google Patents

Orbital engine with radial cylinders Download PDF

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Publication number
WO1987003042A1
WO1987003042A1 PCT/AU1985/000275 AU8500275W WO8703042A1 WO 1987003042 A1 WO1987003042 A1 WO 1987003042A1 AU 8500275 W AU8500275 W AU 8500275W WO 8703042 A1 WO8703042 A1 WO 8703042A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
shaft
engine
cavities
piston
Prior art date
Application number
PCT/AU1985/000275
Other languages
French (fr)
Inventor
Sidney Hugh Russell
Original Assignee
Sidney Hugh Russell
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sidney Hugh Russell filed Critical Sidney Hugh Russell
Priority to PCT/AU1985/000275 priority Critical patent/WO1987003042A1/en
Priority to EP19850905734 priority patent/EP0245245A1/en
Priority to GB08614559A priority patent/GB2195705A/en
Publication of WO1987003042A1 publication Critical patent/WO1987003042A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/32—Engines characterised by connections between pistons and main shafts and not specific to preceding main groups
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B1/00—Reciprocating-piston machines or engines characterised by number or relative disposition of cylinders or by being built-up from separate cylinder-crankcase elements
    • F01B1/06—Reciprocating-piston machines or engines characterised by number or relative disposition of cylinders or by being built-up from separate cylinder-crankcase elements with cylinders in star or fan arrangement
    • F01B1/062—Reciprocating-piston machines or engines characterised by number or relative disposition of cylinders or by being built-up from separate cylinder-crankcase elements with cylinders in star or fan arrangement the connection of the pistons with an actuating or actuated element being at the inner ends of the cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B9/00—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups
    • F01B9/04—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups with rotary main shaft other than crankshaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B57/00—Internal-combustion aspects of rotary engines in which the combusted gases displace one or more reciprocating pistons
    • F02B57/06—Two-stroke engines or other engines with working-piston-controlled cylinder-charge admission or exhaust
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B57/00—Internal-combustion aspects of rotary engines in which the combusted gases displace one or more reciprocating pistons
    • F02B57/08—Engines with star-shaped cylinder arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B2075/1804—Number of cylinders
    • F02B2075/1816—Number of cylinders four

Definitions

  • This invention relates to orbital type motors that do not function with aid of vanes, and can be operated as any type of internal combustion engine,hydraulic motor,or compressor.
  • Background Art In previous constructions involving circular pistons orbiting in a cylindrical cavity,a common problem has found.
  • the cavities can be in any configuration, it is with them set round a cylindrical housing so that, then the cylinder next in order of firing can be used to scoure and recharge the preceeding cylinder;that the engine shows to best advantage.
  • a circular housing excentrically supported round a shaft that is in turn supported centrally and rotatably in an enclosing casing, said housing able to describe an orbital path within the casing on rotation of the shaft relative to the casing.
  • Cylindrical cavities are journalled equally spaced round the peripheral surface of the housing to a required depth,and sections of the same radius as the housing,are made integral with the housing such as to enclose the cavities.
  • Pistons are slidably fitted in the cylindrical cavities, and conected by rods journalled slidably through the inward face of the cavity; to members excentrically supported on a cylindrical bush round the common shaft, rods being pinned to said members. Said members able to orbit within the housing by reason of clearance provided within the housing.
  • the excentric members are set with the maximum throw oposite to the excentrics on which the cylinder housing orbits, and as a consequence, the bush on which the piston excentrics are supported will be caused to orbit in the oposite direction,gearing means are provided between the bush and the shaft to guide the piston excentrics in said oposite direction.
  • the conecting rods will there-fore be able to remain slidably supported in the housing while driving the piston.
  • a further advantage of contra-rotation is that only half the throw of the excentrics is required,with a resulting saving in the Disclosure continued peripheral speed of the members.
  • While the cylinders of the engine can be in any configuration provided they are caused to orbit, the method of spacing them radially round a circular housing has the advantage of permitting each cylinder next in order, to charge the preceeding cylinder as it completes its inward stroke.
  • Cylinder valves slidably fitted in channels communicating the two adjoining cavities,regulate the induction and transfer of said charges from the inward side of the advance piston to the cavity outward of the preceeding piston
  • valves will be drawn inward during the outward movement of the piston,uncovering a port and permitting a charge to be inducted inward of the pistons.
  • the inducted charge is brought under pressure and said pressure drives the valve outwards sealing off the induction port and uncovering one communicating to the preceeding cavity, scouring and re-charging said cavity as it begins its outward stroke.
  • contacts set in the side wall would complete a circuit to the ignition device at the correct time.
  • the usual jacket round the cylinders can be supplied through the stablizing excentrics placed between housing and side wall Lubrication
  • Fig. (1) is a view of the engine with the side casing and adjacent excentric. member (10) removed. Shown are the circular housing (2)in which the cylindrical cavities are journalled.Slidably fitted in the cavities are the pistons (3)conected to the orbiting members on excentric(4)by rod (5 ) beingjournalled through the inner surface of the cavities.
  • the freely rotatable bush (6) supports the excentric members which drive the piston to vary the combustion cavity (8)and the induction cavity (9)which are communicated by channels (16) between adjoining cylinders.
  • the cylinder housing is caused to orbit by excentrics (10)and is linked to the piston excentrics by reverse gearing (7)driving the bush (6)off shaft (15)
  • the combustion cavity (8) recieves injected fuel through ports (11) and is exhausted thruugh port (14)when it communicates with port (12)
  • the induction cavity (9) is charged through channels (16)(not shown)

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)

Abstract

A radial cylinder block (2) eccentrically journalled on a shaft (15) is constrained to orbital motion within a stationary casing (1) by stabilizing eccentrics (not shown) between the cylinder block (2) and casing (1). Opposed pistons (3) within the cylinders are rigidly interconnected and eccentrically mounted on a bushing (6) rotatable about the shaft (15). The piston connecting rods (5) are slidably supported in guide bushes at the inner end of the cylinders. An arrangement of gears (7) between the bushing (6) and shaft (15) ensures that rotation of the shaft (15) and consequent orbital motion of the cylinder block (2) through its eccentrics (10) is accompanied by a counter-rotation of the bushing (6) and piston eccentrics (4) resulting in relative reciprocation of the pistons (3) within the cylinders with reduced absolute velocities of the moving parts. In particular, a two-cycle engine is disclosed with charge transfer between cylinders and having exhaust ports (14) in the cylinder walls which align periodically with matching ports (12) in the casing (1).

Description

ORBITAL ENGINE WITH RADIAL CYLINDERS
Technical Field
This invention relates to orbital type motors that do not function with aid of vanes, and can be operated as any type of internal combustion engine,hydraulic motor,or compressor. Background Art In previous constructions involving circular pistons orbiting in a cylindrical cavity,a common problem has found.
Namely; the need to adequatly support the vanes that are required to divide the cavities,to seal said cavities,and to limit the peripheral speed of the moving parts.
It is the object of this invention to produce an engine fully orbital, but without any of the stated disadvantages. Summary and best method of operation
Features of the engine are--existing cylindrical piston technology is used to provide combustion cavities,valves and timing gear are dispenced with, and the orbital speed of the moving parts are halved,relative to any given movement of the pistons,compared to previous constructions.
While the cavities can be in any configuration, it is with them set round a cylindrical housing so that, then the cylinder next in order of firing can be used to scoure and recharge the preceeding cylinder;that the engine shows to best advantage.
Since the charge is inducted and compressed inward of the pistons for transfer to the combustion cavities,it follows that two stroke operation is not only possible but desirable. Disclosure of Invention. An Orbital reciprocating Engine
Comprising a circular housing excentrically supported round a shaft that is in turn supported centrally and rotatably in an enclosing casing, said housing able to describe an orbital path within the casing on rotation of the shaft relative to the casing. Cylindrical cavities are journalled equally spaced round the peripheral surface of the housing to a required depth,and sections of the same radius as the housing,are made integral with the housing such as to enclose the cavities.
Pistons are slidably fitted in the cylindrical cavities, and conected by rods journalled slidably through the inward face of the cavity; to members excentrically supported on a cylindrical bush round the common shaft, rods being pinned to said members. Said members able to orbit within the housing by reason of clearance provided within the housing.
The excentric members are set with the maximum throw oposite to the excentrics on which the cylinder housing orbits, and as a consequence, the bush on which the piston excentrics are supported will be caused to orbit in the oposite direction,gearing means are provided between the bush and the shaft to guide the piston excentrics in said oposite direction.
It will be seen that as a consequence of this contra-rotation of merabers the inward and outward movements of housing and piston will converge, while the movements at right angles to the direction of reciprocation will be neutralised.
The conecting rods will there-fore be able to remain slidably supported in the housing while driving the piston.
A further advantage of contra-rotation,is that only half the throw of the excentrics is required,with a resulting saving in the Disclosure continued peripheral speed of the members.
While the cylinders of the engine can be in any configuration provided they are caused to orbit, the method of spacing them radially round a circular housing has the advantage of permitting each cylinder next in order, to charge the preceeding cylinder as it completes its inward stroke.
Cylinder valves slidably fitted in channels communicating the two adjoining cavities,regulate the induction and transfer of said charges from the inward side of the advance piston to the cavity outward of the preceeding piston
The valves will be drawn inward during the outward movement of the piston,uncovering a port and permitting a charge to be inducted inward of the pistons.When the inward piston stroke begins, the inducted charge is brought under pressure and said pressure drives the valve outwards sealing off the induction port and uncovering one communicating to the preceeding cavity, scouring and re-charging said cavity as it begins its outward stroke.
It will be seen that efficient two stroke operation can be readily achieved.
When used for internal combustion in Diesel operation, the fact that the cylinder housing is in orbital motion presents no problem,since injectors positioned in the Cylinder housing will communicate with ports at the top of the cavities
If electrical ignition is used, contacts set in the side wall would complete a circuit to the ignition device at the correct time.
Exhaust ports in cylinder and side wall communicate as required to exhaust the cylinders, as a consequence of the orbit of the cylinder housing, said exhaust flowing to a manifold integral with the side walls. Disclosure continued
In whatever configuration the cylinders are placed, the engine will be completely orbital, the reciprocation of the piston in the cylinders is purely relative, the piston would follow the same path,whether it was in the cylinder or not, and since the orbital members each provide only half the total stroke of the engine, they need be only half the size,allowing the stroke to be increased without exceeding the permitted limits of peripheral speed. Sealing
Conventional proven sealing can be used between pis.ton and cylinder walls, and circular seals between side walls and cylinder housing, are needed for exhaust and injection ports. Cooling
The usual jacket round the cylinders, can be supplied through the stablizing excentrics placed between housing and side wall Lubrication
The clearance in the housing centre provided for the piston excentrics,would serve as would a crank case. While the engine would operate with-out the reverse gearing between cylinder housing and piston, it should be understood that the drive would then be taken by the rod where it passes through the housing.
Sufficient bearing surface would need to be provided to take the drive,and the rod given enough rigidity to prevent flexing Ignition
Since the cylinder is in orbital motion during operation, provision is made to flow fuel to the cylinder heads where injectors in said heads are operated by cams in the outer casing For electrical ignition, contacts are set in the side walls. Discription of drawings ( 1 )
Fig. (1) is a view of the engine with the side casing and adjacent excentric. member (10) removed. Shown are the circular housing (2)in which the cylindrical cavities are journalled.Slidably fitted in the cavities are the pistons (3)conected to the orbiting members on excentric(4)by rod (5 ) beingjournalled through the inner surface of the cavities.
The freely rotatable bush (6)supports the excentric members which drive the piston to vary the combustion cavity (8)and the induction cavity (9)which are communicated by channels (16) between adjoining cylinders.
The cylinder valve (18)will be drawn inward during the outward movement of the piston, allowing induction to take place through channel (17)as the piston moves inward,pressure causes the valve (18) to move outward uncovering port (16) and allowing a charge to flow into the cavity as the piston reaches the inward point of its travel, scouring the cavity through the ports (12) (14)and recharging it. Fig(2)
Is a view of the engine through section lines A-A showing the outer casing (1) enclosing the cylinder housing (2)in which the pistons (3)reciprocate, driven by the conecting rods (5)on members supported on excentrics (4)from the bush which is supported on the common shaft (15)
The cylinder housing is caused to orbit by excentrics (10)and is linked to the piston excentrics by reverse gearing (7)driving the bush (6)off shaft (15)
The combustion cavity (8)recieves injected fuel through ports (11) and is exhausted thruugh port (14)when it communicates with port (12)
The induction cavity (9)is charged through channels (16)(not shown)
Manifold (13)conducts away the spent gasses.

Claims

THE CLAIMS DEFINING THIS INCENTION ARE AS FOLLOWS
Claim (1)
An engine comprising a housing supported on members excentrically supported on a shaft, to describe an orbital path with-in an outer casing in which the shaft is retatably supported in the side walls of said casing.
Cylindrical cavities journalled to required depth in the housing,slidably accomadate pistons that are conected by rods journalled through the inner face of the cavities,to further excentrally mounted members which act to describe an orbital path with-in the housing,having clearance provided round the common shaft.
The piston members individually supported on excentric sections integral with a bush freely supported round the shaft, said members being set with the throw of the excentrics oposite to those of the cylinder housing,will accomadate to the orbital movement of the housing,by orbiting in the reverse direction.
The pistons will be caused to reciprocate with-in the cavities and the orbital movement of the housing at right angles to the direction of reciprocation, will be neutralised by the same degree of movement in the same direction by the piston and conecting rod.
Means provided to regulate the admission to and exhaust from each cavity in sequence,of a working fluid to induce orbiting of the housing and resultant rotation of the shaft.
Claim(2)
An engine as in claim (1)having the cylindrical cavities equally spaced round a circular housing,which is excentrically supported on a shaft to describe an orbital path with-in an enclosing casing on rotation of the shaft relative to the casing said shaft rotatably supported in the side walls of said casing. Claim (2) continued
The cavities journalled to a required depth, slidably accommadate pistons that are conected by rods journalled through the inner surface of the cavities, to further excentrically mounted members supported on a bush which is itself freely supported round the common shaft within the housing.
The piston excentrics positioned on the oposite throw to those of the housing excentrics,will cause the piston and its conecting rod to orbit in the reverse direction to that of the housing,on rotation of the shaft relative to the casing, causing the piston to reciprocate in the cavities, while neutralising the orbital movement of the housing at right angles to the direction of reciprocation, by the equal movement of its own in that same direction.
The engine being operable as an internal combustion engine and including means to regulate in sequence the admission, ignition,and exhaust of a gasseous mixture relative to each cavity to induce orbiting of the housing and resultant rotation of shaft. Claim (3).
An engine as in claims one and two,operable as a two stroke internal combustion engine,having the means to induct charges to the inward side of the pistons in each cavity,and transfer said charges to combustion cavities formed in the cylinders in the preceeding order of firing,said transfer acting to scoure and recharge them prior to their compression stroke. Claim (4)
An engine as in claim (2) where channels provided between the cavities are bisected by a cylindrical slideway in which a valve is pressure operated to reciprocate pillowing the preceeding cavity to be charged or isolated as required,and fresh induction permitted. Claims continued Claim (5)
An engine as in claims (2) and (3) where fuel injectors are provided in the eylinder housing, serving to inject fuel into the head of the combustion cavity,and operated by cam tracks in the side walls.
Claim (6)
An engine as in all previous claims having reverse gearing provided between shaft and excentric piston bush,acting to guide the said bush in contra-rotation. Claim(7)
An engine as in all previous claims,having the cylinders placed in any configuration.
PCT/AU1985/000275 1985-11-12 1985-11-12 Orbital engine with radial cylinders WO1987003042A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/AU1985/000275 WO1987003042A1 (en) 1985-11-12 1985-11-12 Orbital engine with radial cylinders
EP19850905734 EP0245245A1 (en) 1985-11-12 1985-11-12 Orbital engine with radial cylinders
GB08614559A GB2195705A (en) 1985-11-12 1986-06-16 Orbital reciprocating engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/AU1985/000275 WO1987003042A1 (en) 1985-11-12 1985-11-12 Orbital engine with radial cylinders

Publications (1)

Publication Number Publication Date
WO1987003042A1 true WO1987003042A1 (en) 1987-05-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1985/000275 WO1987003042A1 (en) 1985-11-12 1985-11-12 Orbital engine with radial cylinders

Country Status (2)

Country Link
EP (1) EP0245245A1 (en)
WO (1) WO1987003042A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994005902A1 (en) * 1992-08-28 1994-03-17 Josef Gail Rotary cylinder engine
WO1995012754A1 (en) * 1993-11-04 1995-05-11 Max Liebich Piston engine
WO2000019071A1 (en) * 1998-09-28 2000-04-06 Jorma Lillbacka A valveless engine
EP1045963A1 (en) * 1997-12-15 2000-10-25 Entec Engine and Research Corporation Orbital internal combustion engine
US6895906B1 (en) * 1997-10-06 2005-05-24 John Peter Gahan Rotary two-stroke engine
US8052401B2 (en) 2005-10-11 2011-11-08 Parker-Hannifin Corporation Double-acting radial piston hydraulic apparatus

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3258992A (en) * 1963-02-15 1966-07-05 John L Hittell Reciprocating piston engines
US3517651A (en) * 1969-03-11 1970-06-30 Graybill Ind Inc Rotary two-cycle engine
AU6476074A (en) * 1973-02-02 1974-05-02 Collins Motor Corporation Limited Rotary internal combustion engine
US3946706A (en) * 1973-06-14 1976-03-30 Yves Pailler Rotary machines comprising four cylinders in a star
AU1589676A (en) * 1976-04-30 1977-03-10 Norman George Wheatley AN ENGINE WITH Specification RECIPROCATING PISTONS ORBITAL THRUST BEARING AND DRIVE CAM
AU3687978A (en) * 1978-06-06 1979-12-13 Norman George Wheatley Opposed piston internal combustion engine
WO1980002584A1 (en) * 1979-05-15 1980-11-27 Price Batten Pty Ltd Rotary radial internal combustion engine
US4331108A (en) * 1976-11-18 1982-05-25 Collins Brian S Radial engine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3258992A (en) * 1963-02-15 1966-07-05 John L Hittell Reciprocating piston engines
US3517651A (en) * 1969-03-11 1970-06-30 Graybill Ind Inc Rotary two-cycle engine
AU6476074A (en) * 1973-02-02 1974-05-02 Collins Motor Corporation Limited Rotary internal combustion engine
US3946706A (en) * 1973-06-14 1976-03-30 Yves Pailler Rotary machines comprising four cylinders in a star
AU1589676A (en) * 1976-04-30 1977-03-10 Norman George Wheatley AN ENGINE WITH Specification RECIPROCATING PISTONS ORBITAL THRUST BEARING AND DRIVE CAM
US4331108A (en) * 1976-11-18 1982-05-25 Collins Brian S Radial engine
AU3687978A (en) * 1978-06-06 1979-12-13 Norman George Wheatley Opposed piston internal combustion engine
WO1980002584A1 (en) * 1979-05-15 1980-11-27 Price Batten Pty Ltd Rotary radial internal combustion engine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994005902A1 (en) * 1992-08-28 1994-03-17 Josef Gail Rotary cylinder engine
US5720241A (en) * 1992-08-28 1998-02-24 Gail; Josef Rotary cylinder engine
WO1995012754A1 (en) * 1993-11-04 1995-05-11 Max Liebich Piston engine
US6895906B1 (en) * 1997-10-06 2005-05-24 John Peter Gahan Rotary two-stroke engine
EP1045963A1 (en) * 1997-12-15 2000-10-25 Entec Engine and Research Corporation Orbital internal combustion engine
EP1045963A4 (en) * 1997-12-15 2004-06-16 Entec Engine And Res Corp Orbital internal combustion engine
WO2000019071A1 (en) * 1998-09-28 2000-04-06 Jorma Lillbacka A valveless engine
US6240884B1 (en) 1998-09-28 2001-06-05 Lillbacka Jetair Oy Valveless rotating cylinder internal combustion engine
US8052401B2 (en) 2005-10-11 2011-11-08 Parker-Hannifin Corporation Double-acting radial piston hydraulic apparatus

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