Hydrostatic pump including separate noise reducing valve assembl

Details Hydrostatic pump including separate noise reducing valve assembl Hydrostatic pump including separate noise reducing valve assembl

1974-12-09

1976-05-18

Freeh, William L.

Motors: expansible chamber type

Fluid supply through diverse paths to single expansible chamber

Three or more cylinders arranged in parallel, radial or...

91487, F01B 1304

Patent

active

039569691

ABSTRACT:
In order to reduce noise and erosion within a hydrostatic translating unit having a reversible mode of operation, preferably a pump, of the type having a cylinder barrel defining a plurality of piston bores with the cylinder barrel being rotatable relative to a cylinder head for periodically communicating the piston bores with first and second pressure ports or passages, a restrictive orifice and shuttle valve are arranged in parallel communication between each pressure port and an intermediate port positioned for communication with each cylinder bore prior to communication of the cylinder bore with the respective pressure port.

REFERENCES:
patent: 2963983 (1960-12-01), Wiggermann
patent: 3157130 (1964-11-01), Cadiou
patent: 3199461 (1965-08-01), Wolf
patent: 3200761 (1965-08-01), Firth et al.
patent: 3208397 (1965-09-01), Lehrer et al.
patent: 3382813 (1968-05-01), Schauer
patent: 3585901 (1971-06-01), Moon

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