Rotary expansible chamber devices – Moving cylinder – Rotating
Patent
1981-12-18
1984-02-21
Smith, Leonard E.
Rotary expansible chamber devices
Moving cylinder
Rotating
74804, F04C 210
Patent
active
044327129
ABSTRACT:
A hydrostatic gear ring pump or motor has a housing with an inner hollow and an inlet side and an outlet side, a hollow gear arranged in the housing and provided with between eight and sixteen teeth, and a driven pinion provided with teeth having by one tooth less than the hollow gear and engaging with the hollow gear so as to form a region of deepest engagement and a region which is opposite to the latter. The teeth heads of the pinion sliding over the teeth of the hollow gear in the opposite region whereas the driving or driven teeth flanks of the pinion abut against the teeth of the hollow gear in the region of deepest engagement so as to provide sealing between the suction side and pressure side. The teeth are formed so that the teeth heads of said pinion are freely received into the teeth gaps of the hollow gear and the teeth of the pinion has a shape determined by rolling of the pinion over the hollow gear. The teeth of the hollow gear have an approximately trapezoidal shape with convexly curved flanks and heads.
REFERENCES:
patent: 892295 (1908-06-01), Nutz
patent: 1341846 (1920-06-01), Gollings
patent: 1516591 (1924-11-01), Edwards
patent: 2091317 (1937-08-01), Hill
patent: 3619093 (1971-11-01), Harle et al.
patent: 3907470 (1975-09-01), Harle et al.
patent: 4155686 (1979-05-01), Eisenmann et al.
Smith Leonard E.
Striker Michael J.
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