# US 10,871,071 B1 · Rotary engine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,871,071 B1 - Document ID: US10871071B1 - Status: Granted - Kind: B1 - Application number: 15/652,637 - Filed: 2017-07-18 - Granted: 2020-12-22 - Earliest claimed: 2017-07-18 - Applicants: David Joseph Strain - Inventors: David Joseph Strain - Web page: https://patentgrep.com/patent/US10871071B1 ## CPC - F01C 1/22: of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth- equivalents than the outer member - F01C 21/08: Rotary pistons (reciprocating pistons in general F16J) - F01C 21/18: Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet - F02B 53/10: Fuel supply; Introducing fuel to combustion space - F02B 53/12: Ignition - F02B 55/02: Pistons - F02B 55/16: Admission or exhaust passages in pistons or outer members - Y02T 10/12: Improving ICE efficiencies - F01C: ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES (internal-combustion aspects F02B53/00, F02B55/00) - F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A rotary engine includes a rotor coupled to a shaft, the rotor having a first side wall, a second opposing side wall, and a rim extending between the first side wall and the second side wall. A piston extends from the rim of the rotor. A pressure chamber is defined by a face of the piston, the interior surface of a housing, and the rim of the rotor. An inlet directs fluid through the housing and into the pressure chamber. A backpressure flap is pivotably attached to the interior surface of the housing. An outlet directs fluid from the pressure chamber to the exterior of the housing. An effluent flap is pivotably attached to the interior surface of the housing. The inlet and outlets are closed when their respective flaps sealingly engage an interior surface of the housing. ## Claims ### Claim 1 A rotary engine comprising: a rotor including a rim; a piston disposed on the rim of said rotor; a housing sealingly engaging said rotor and said piston, wherein said housing defines a pressure chamber between said rotor, said piston, and an interior wall of said housing, and wherein said housing defines an inlet configured to allow fluid to flow into said pressure chamber and an outlet configured to allow fluid out of said pressure chamber; a backpressure flap pivotably attached to the interior wall of said housing and operable to move between a first position wherein an edge of said backpressure flap sealingly engages the rim of said rotor and a second position wherein said backpressure flap closes said inlet; and an effluent flap pivotably attached to the interior wall of said housing and operable to move between a first position wherein an edge of said effluent flap sealingly engages the rim of said rotor and a second position wherein said effluent flap closes said outlet, and a piston position sensor disposed within said housing and configured to detect a position of said piston in proximity thereto, wherein fluid flowing into said rotor through said inlet impinges upon said piston, thereby causing rotation of said rotor. ### Claim 2 A rotary engine comprising: a rotor coupled to a shaft such that rotation of said rotor causes a corresponding rotation of said shaft, wherein said rotor comprises a first side wall, a second opposing sidewall, and a rim extending between the first side wall and the second side wall; a piston extending from the rim of said rotor and comprising a sloping rear face and a front face; a housing encompassing said rotor and said piston, wherein a portion of the piston at a junction of said rear face and said front face is sealingly engaged with an interior surface of said housing, and wherein a pressure chamber is defined by a face of said piston, the interior surface of said housing, and the rim of the rotor; an inlet for directing a fluid through said housing and into said pressure chamber; a backpressure flap pivotably attached to the interior surface of said housing and configured to move between sealing engagement with the interior surface of said housing and sealing engagement with the rim of said rotor, such that said inlet is closed when the backpressure flap is in sealing engagement with the interior surface of said housing; an outlet for directing fluid from said pressure chamber to an exterior of said housing; and an effluent flap pivotably attached to the interior surface of said housing and configured to move between sealing engagement with the interior surface of said housing and sealing engagement with the rim of said rotor, such that the outlet is closed when the effluent flap is in sealing engagement with the interior surface of said housing. ### Claim 3 (depends on 2) The rotary engine according to claim 2, further comprising a piston position sensor embedded within said housing and configured to detect a position of said piston in proximity thereto. ### Claim 4 (depends on 2) The rotary engine according to claim 2, further comprising an inlet valve attached to said housing and configured to selectively open and close said inlet. ### Claim 5 (depends on 4) The rotary engine according to claim 4, further comprising a control processor in electronic communication with said inlet valve for controlling the opening and closing of said inlet valve. ### Claim 6 (depends on 2) The rotary engine according to claim 2, further comprising an injector configured to inject either steam or an air/fuel mixture into said pressure chamber. ### Claim 7 (depends on 6) The rotary engine according to claim 6, wherein said injector is configured to inject an air/fuel mixture into said pressure chamber, and wherein the rotary engine further comprises an igniter configured to ignite the air/fuel mixture upon injection into the pressure chamber. ### Claim 8 A rotary engine comprising: a rotor coupled to a shaft such that rotation of said rotor causes a corresponding rotation of the shaft, wherein said rotor comprises a first side wall, a second opposing side wall, and a rim extending between the first side wall and second side wall; a plurality of pistons extending from the rim of said rotor and being equidistant from one to another, wherein each of the plurality of said pistons comprises a sloping rear face and a front face; a housing encompassing said rotor and said plurality of pistons, wherein a portion of said each of the plurality of said pistons sealingly engages an interior surface of said housing at a junction between the rear face and the front face of said each of the plurality of said pistons respectively; a plurality of inlet/outlet pairs, each of the plurality of said inlet/outlet pairs being equidistant from one to another and comprising: a first opening defined in said housing and extending from an exterior surface of said housing to the interior surface thereof, and a second opening defined in said housing and extending from the exterior surface of said housing to the interior surface thereof; a plurality of backpressure flaps, each of the plurality of said backpressure flaps pivotably attached to the interior of said housing and configured to move between a first position, wherein said each of the plurality of said backpressure flaps sealingly engages the interior surface of said housing, and a second position, wherein said each of the plurality of said backpressure flaps sealingly engages the rim of said rotor, and wherein when in the first position said each of the plurality of said backpressure flaps closes an adjacent inlet; and a plurality of effluent flaps, each of the plurality of said effluent flaps pivotably attached to the interior of said housing and configured to move between a first position, wherein said each of the plurality of said effluent flaps sealingly engages the interior surface of said housing, and a second position, wherein said each of the plurality of said effluent flaps sealingly engages the rim of said rotor, and wherein when in the first position said each of said plurality of effluent flaps closes an adjacent outlet. ### Claim 9 (depends on 8) The rotary engine according to claim 8, further comprising a piston position sensor disposed within said housing and configured to detect a position of said each of the plurality of said pistons in proximity thereto. ### Claim 10 (depends on 8) The rotary engine according to claim 8, further comprising a plurality of injectors, each of the plurality of said injectors configured to inject either steam or an air/fuel mixture into one of a plurality of pressure chambers defined by said housing, said rotor, said each of the plurality of said pistons, and said each of the plurality of said backpressure flaps. ### Claim 11 (depends on 10) The rotary engine according to claim 10, wherein the plurality of said injectors is configured to inject an air/fuel mixture; and wherein the rotary engine further comprise a plurality of igniters, each of the plurality of said igniters configured to ignite said air/fuel mixture upon said air/fuel mixture being injected into said one of the plurality of said pressure chambers.