Hydrostatic gear ring machine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 21, 1984
Issued Date -
N/A
app pub date -
Dec 18, 1981
filing date -
Jul 10, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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