# US 5,699,757 A · Internal combustion engine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,699,757 A - Document ID: US5699757A - Status: Granted - Kind: A - Application number: 08/718,676 - Filed: 1996-09-24 - Granted: 1997-12-23 - Earliest claimed: 1996-09-24 - Inventors: Georg B. Wollny; Marian Chmiel - Web page: https://patentgrep.com/patent/US5699757A ## CPC - F01C 9/002: {the piston oscillating around a fixed axis} - F02B 2075/027: {four} - 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) ## Abstract A swivel-blade internal combustion engine which produces gas pressure energy for two-cycle and four-cycle operation is disclosed. The engine includes a reciprocating shaft (24) and a reciprocating element (9) supported on the reciprocating shaft. The reciprocating element (9) has a working surface adapted and positioned to receive the gas pressure energy for producing an oscillating pendulum moment in the reciprocating element. The working surface of the reciprocating element preferably has a trapezoidal shape which is rounded on the head. A rocker arm system (16) is provided for converting the pendulum moment into the torque of a crankshaft. The rocker arm system includes a swing arm (21) fixed solidly on the reciprocating shaft (24) and an articulated connecting rod (20) connected to the swing arm and to the crankshaft through which the pendulum moment is passed to the crankshaft. ## Claims ### Claim 1 Swivel-blade internal combustion engine which produces gas pressure energy for two-cycle and four-cycle operation comprising: a reciprocating shaft (24); a reciprocating element (9) supported on said reciprocating shaft (24), said reciprocating element (9) having a working surface adapted and positioned to receive gas pressure energy for producing an oscillating pendulum moment in the reciprocating element, said working surface having a shape which deviates from both a rectangular and circular segment form, said working surface having a wider surface area presented at locations more distant from the reciprocating shaft (24); rocker arm means (16) for converting the pendulum moment into the torque of a crankshaft (25), said rocker arm means further comprising a swing arm (21) fixed solidly on the reciprocating shaft (24), said swing arm (21) spanning a pendulum angle .beta.w of a minimum of 90.degree. and a maximum of 130.degree. and having an angle .alpha.p which moves in a range greater than 0.degree. up to a maximum of 30.degree. and an articulated connecting rod (20) connected to the swing arm and to the crankshaft through which the pendulum moment is passed to the crankshaft. ### Claim 2 (depends on 1) Swivel-blade internal combustion engine according to claim 1 wherein said working surface of the reciprocating element (9) has a trapezoidal shape which is enlarged from the shaft outward and is rounded on the head. ### Claim 3 (depends on 1) Swivel-blade internal combustion engine according to claim 1 wherein the reciprocating element (9) includes two blades, and said engine has two combustion chambers and only one working chamber. ### Claim 4 (depends on 1) Swivel-blade internal combustion engine according to claim 1 wherein the reciprocating element (9) includes only a singular blade, and said engine has only one combustion chamber and only one working chamber. ### Claim 5 Swivel-blade internal combustion engine which produces gas pressure energy for two-cycle and four-cycle operation comprising: a reciprocating shaft (24); a reciprocating element (9) supported on said reciprocating shaft (24), said reciprocating element (9) having a working surface adapted and positioned to receive the gas pressure energy for producing an oscillating pendulum moment in the reciprocating element, said working surface having a shape which deviates from a rectangular form; rocker arm means (16) for converting the pendulum moment into the torque of a crankshaft, said rocker arm means further comprising a swing arm (21) fixed solidly on the reciprocating shaft (24) and an articulated connecting rod (20) connected to the swing arm and to the crankshaft through which the pendulum moment is passed to the crankshaft wherein a change in the compression through a change in the length of the swing arm (21) is achieved by means of eccentricity of the swing arm pin. ### Claim 6 Swivel-blade internal combustion engine which produces gas pressure energy for two-cycle and four-cycle operation comprising: a reciprocating shaft (24); a reciprocating element (9) supported on said reciprocating shaft (24), said reciprocating element (9) having a working surface adapted and positioned to receive gas pressure energy for producing an oscillating pendulum moment in the reciprocating element, said working surface having a shape which deviates from both a rectangular and circular segment form, said working surface having a wider surface area presented at locations more distant from the reciprocating shaft (24); rocker arm means (16) for converting the pendulum moment into the torque of a crankshaft (25), said rocker arm means further comprising a swing arm (21) fixed solidly on the reciprocating shaft (24) and an articulated connecting rod (20) connected to the swing arm and to the crankshaft through which the pendulum moment is passed to the crankshaft, said swing arm (21) spanning a pendulum angle .beta.w of a minimum of 90.degree. and a maximum of 130.degree. and having an angle .alpha.p between the swing arm and crankshaft in the reversing position of the pendulum element which moves in a range greater than 0.degree. up to a maximum of 30.degree., and wherein said reciprocating element (9) has a left-hand direction of rotation. ### Claim 7 (depends on 6) Swivel-blade internal combustion engine according to claim 6 wherein said working surface of the reciprocating element (9) has a trapezoidal shape which is enlarged from the shaft outward and has one of a rounded head and a flat head. ### Claim 8 (depends on 6) Swivel-blade internal combustion engine according to claim 6 wherein the reciprocating element (9) consists of one blade, and said engine has one combustion chamber and one working chamber. ### Claim 9 (depends on 6) Swivel-blade internal combustion engine according to claim 6 wherein the reciprocating element (9) comprises two blades, and said engine has two combustion chambers and only one working chamber. ### Claim 10 (depends on 8) Swivel-blade internal combustion engine according to claim 8 wherein the swing arm (21) sweeps over a pendulum angle of .beta.w of a minimum of 90.degree. and a maximum of 130.degree. and having an angle .alpha.p which moves in a range larger than 0.degree. to a maximum of 20.degree.. ### Claim 11 (depends on 9) Swivel-blade internal combustion engine according to claim 9 wherein the swing arm (21) sweeps over a pendulum angle of .beta.w of a minimum of 90.degree. and a maximum of 130.degree. and having an angle .alpha.p which moves in a range larger than 15.degree. to a maximum of 35 .degree.. ### Claim 12 (depends on 6) Swivel-blade internal combustion engine according to claim 6 which facilitates a correction in the degree of compression by one of: a) varying the length of the swing arm (21) by means of an eccentric oscillating arm bolt or exchange if the swing arm; and b) correcting the position setting of the working range together with the combustion chamber head to the blade with the aid of the angle regulation of this periphery to the other construction.