Patent GB-1147361-A (GB)
Title: Rotary piston machines
Inventor: LEBLANC MICHEL
IPC: F02B75/02
Filed: 1966-04-07
Abstract: 1,147,361. Rotary-piston machines. M. LEBLANC. April 7, 1966, No. 15693/66. Heading F1F. A rotary-piston I.C. engine, pump, vacuum pump, compressor or hydraulic motor of the intermittent abutment type comprises a casing 1, Figs. 1 and 6, which contains two pairs of diametrally-opposed pistons 11, 12 and 15, 16 rotatively mounted on a fixed shaft 8 and connected to a power-output, or input, shaft 5 by mechanism that renders the angular velocity of the shaft 5 substantially constant while that of the pistons varies so as to effect cyclic changes in the volumes of working spaces between the pistons. The mechanism aforesaid may comprise a "sun" gearwheel 45 fixed to the shaft 5 and meshing with "planet" gear-wheels 46, 46', which mesh with a non-rotatable internally-toothed annulus 48 and are attached to crank-shafts 27, 27', respectively, carried by a rotatable annular body or carrier 31, crank-pins 33, 34 on each crank-shaft being engaged by rectangular blocks 35, 39 that are slidingly lodged in respective rectangular openings 36, 41 within a disc 18 fixed to the pistons 15, 16 and an annular body or support 14 fixed to the pistons 11, 12. Six pairs of inlet and outlet ports 51a, 52a to 51f, 52f for the working fluid are provided in the peripheral wall of the casing adjacent sealing strips 56a to 56f. When the machine operates as a pump. Figs. 9a to 91 (not shown), working fluid is drawn into each working space while it is in register with any one of the inlet ports and is subsequently ejected when the space comes into register with an outlet port. The gear-wheel 45 may be omitted, the journals 26, 26' of the crank-shafts 27, 27' then being rotatively mounted in a yoke (10), Fig. 7 (not shown), which is fixed to the shaft 5 in place of the carrier 31. When the machine is adapted to operate as an I. C. engine, only three pairs of inlet and outlet ports are provided in the casing, Figs. lOa to 101 (not shown), spark plugs being located between the pairs of ports and recesses being formed in the radial faces of the pistons to form combustion chambers (61a to Gla). A second embodiment, Fig. 14 (not shown), which is adapted to operate as a combined I. C. engine and pump or compressor, comprises only two pistons (171, 172), a spark plug (176) lodged in a combustion chamber (175) within the peripheral wall of the casing, a pair of ports (177, 178) for the fuel-air mixture and exhaust gases, respectively, and a pair of ports (181, 182) for the fluid that undergoes pumping or compression. This embodiment may be modified, Fig. 15 (not shown), such that it has a total of eight pistons. A third embodiment, Fig, 16 (not shown), is basically similar to that shown save that it has two sets of pistons (311, 312 and 311a, 312a) separately connected to a common shaft (305) by mechanism similar to that according to Fig. 1. This embodiment can be adapted to operate as either a pump or an I.C. engine. A fourth embodiment, Fig. 17 (not shown), is basically the same as that shown but comprises two sets of pistons (411, 412 and 411b, 412b) connected to each other and to a common shaft (405) by mechanism similar to that according to Fig. 1. This embodiment can be adapted to operate as a pump for two dissimilar fluids, a combined motor and pump, or a combined I. C. engine and pump. The embodiment shown may be modified, Figs. 18 and 19 and Fig. 20 (not shown), with regard to the number and angular magnitudes of the pistons, and can be reversed by changing the angular position of the annulus 48 relative to the casing.