Patent GB-1105756-A (GB)
Title: Rotary-piston machines
IPC: F02B53/00
Filed: 1966-07-01
Abstract: 1,105,756. Rotary-piston pumps and engines. E. A. LINK. July 1, 1966, No.29724/66. Heading F1F. A rotary-piston I. C. engine comprises a twolobed piston or rotor 38, Fig. 1, that is lodged in a housing or stator 10 whose inner peripheral surface has a three-lobed profile, the piston being rotatably mounted on an eccentric pin 62 attached to a rotatable power-output shaft 64, Fig. 2, so that in operation the piston rotates in a planetary manner while a four-phase cycle of operations is performed in each of three working spaces 20, 22, 24 between the piston and the housing. Sealing of the working spaces is effected by flexible portions 32, 34, 36 of the peripheral wall of the housing, which portions are pressed against the piston by the pressure of gases in curvilinear slots 26, 28, 30. Fuel-air mixture generated in a carburetter 61 is periodically and sequentially drawn into the working spaces by the action of the piston through a passage 58 in the shaft 64, a recess 54 in one side of the piston and a passage 44 in one lobe 42 of the piston, the outlet end 50 of the passage 44 being controlled by the peripheral wall of the housing. Exhaust gases are periodically and sequentially ejected from the working spaces through a further passage 46 in the lobe 42, which passage is generally similar to the passage 44, a recess 52 situated in the piston on the axiallyopposite side thereof relative to the recess 54, and an aperture 56 in the adjacent end-wall 12 of the housing. Ignition of the compressed fuelair mixture in the working spaces is effected either by a glow-plug 66 lodged in the other lobe 40 of the piston or by a spark-plug in each working space. The engine may be modified, Fig. 9 (not shown), to operate as either a pump or a fluiddriven motor, inlet and outlet passages (90, 92) for the'working fluid being situated in each lobe of the piston. In another embodiment of the engine, Figs. 10 and 11 (not shown), both the piston (100) and the housing (102) are rotatable relative to a fixed hollow-shaft (104), the piston being rotatably mounted on an eccentric pin (120) attached to said shaft whereas the housing has one of its end walls (110) connected to a power-output sprocket-wheel or pulley (112) by a further hollow shaft through which exhaust gases are ejected from the working spaces. Fuel-air mixture is delivered to the working spaces through the shaft (104); and when the mixture has been compressed by the piston it is ignited by either a spark-plug (140) in each working space or a glow-plug lodged in one lobe (130) of the piston, contacts (146, 148) in the ignition system associated with the spark-plugs being controlled by a cam (144) attached to the other end-wall (108) of the housing. The engine is otherwise identical to that shown in Figs. 1 and 2. In a further embodiment, Fig. 12 (not shown), the piston has three lobes and the profile of the inner peripheral-surface of the housing has four lobes, inlet and outlet passages (172, 174) being provided in each lobe of the piston so that pumping can be effected. The piston may be connected to the driving or power-output shaft by toothed gearing (not shown in the drawings) instead of an eccentric pin on the shaft.