Motors: expansible chamber type – Three or more cylinders arranged in parallel radial or... – Cylinders parallel to rotation axis
Patent
1973-10-25
1976-12-28
Freeh, William L.
Motors: expansible chamber type
Three or more cylinders arranged in parallel radial or...
Cylinders parallel to rotation axis
F01B 1304
Patent
active
039994660
ABSTRACT:
A hydrostatic pump/motor unit has a cylinder system that is positively controlled by a relatively revolving porting means having suction and pressure ports separated by dead center areas therebetween which are interconnected by canal means for compensating the pressure between cylinder ports of the system which have left communication with the suction port and cylinder ports which have left communication with the pressure port wherein the ends of the canal means are provided with openings in the dead center areas that are larger than the distance between cylinder ports and the circumferential distance between such openings and the pressure port and between such openings and the suction port on both sides of each of said openings is greater than the diameter of the individual cylinder ports so that an exchange of pressure occurs first between neighboring cylinders passing over one of the openings and then between such neighboring cylinders and the non-adjacent cylinder in the other dead center area.
REFERENCES:
patent: 3094078 (1963-06-01), Brueder
patent: 3157130 (1974-11-01), Cadiou
patent: 3200761 (1965-08-01), Firth et al.
patent: 3362342 (1968-01-01), Flint et al.
patent: 3520229 (1970-07-01), Slimm et al.
patent: 3727521 (1973-04-01), Reynolds
patent: 3847057 (1974-11-01), Bosch
patent: 3858483 (1975-01-01), Hein
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