Rotary expansible chamber devices – Working member has planetary or planetating movement – Plural working members or chambers
Patent
1974-11-19
1976-04-27
Scott, Samuel
Rotary expansible chamber devices
Working member has planetary or planetating movement
Plural working members or chambers
64 9R, F16C 102
Patent
active
039531589
ABSTRACT:
Axial retention of the drive shaft is provided in a fluid pressure device of the type including an internally-toothed member, an externally-toothed member disposed eccentrically therein for relative orbital and rotational movement, and a drive shaft extending into a central bore defined by the externally-toothed member. The drive shaft has male splines and the externally-toothed member has female splines in the central bore, engaging the male splines. The front face of the externally-toothed member has a recess including a stop surface generally perpendicular to the axis of the device and the drive shaft has a shoulder extending radially outward and engaging the stop surface to limit the axial movement of the drive shaft into the central bore. Wear is minimized because the mating stop surface and shoulder are rotating at the same speed and, preferably, the shoulder "nutates" with respect to the stop surface.
REFERENCES:
patent: 3549285 (1970-12-01), Woodling
patent: 3658450 (1972-04-01), Woodling
patent: 3692440 (1972-09-01), Woodling
patent: 3863449 (1975-02-01), White
Eaton Corporation
Heald Randall
Scott Samuel
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