Bypass for a hydrostatic transmission
AssigneeHydro-Gear Limited Partnership
InventorsRaymond Hauser, John Schreler, Michael Houser, Juan Pedro Roberto A. Oolnk
Life of this patent
Estimating the term…
Abstract
A hydrostatic transmission design incorporating a mechanical bypass having a filter housing mounted adjacent to check valves in a center section. The filter housing can be secured to the center section and acts to house the actuation member which moves to unseat the check balls and place the unit into bypass. An actuation rod is mounted external to the filter housing and can be rotated to move the actuation member into or out of the bypass position.
Claims16
A hydrostatic transmission, comprising
- (a) a hydraulic pump mounted in a casing;
- (b) a hydraulic motor mounted in said casing and operatively connected to said pump through hydraulic porting;
- (c) a sump formed in said casing;
- (d) a plurality of check valves operatively connected to said hydraulic porting to enable fluid flow between said sump and said porting;
- (e) a filter mounted in said casing adjacent to said check valves;
- (f) an actuation member mounted between said filter and said check valves, said member positioned to engage and open said check valves;
- (g) an actuation rod mounted outside said filter and rotatable to engage said actuation member to force said check valves to open.
A bypass mechanism for use in a hydrostatic transmission having a pump and a motor and a hydraulic circuit for connecting said pump and motor, comprising
- (a) a plurality of check valves operatively connected to said hydraulic circuit, said check valves having an open and closed position;
- (b) a filter housing mounted adjacent to said check valves;
- (c) an actuation member slidably mounted in said filter housing, said actuation member having a plurality of projections for contacting said check values;
- (d) a bypass actuation rod mounted external to said filter housing and rotatable to engage said actuation member to force said projections into contact with check valves to place hydrostatic transmission into bypass.
A bypass mechanism for use in a hydrostatic transmission having a pump and a motor rotatably mounted on a center section, and a hydraulic circuit for connecting said pump and motor integrally formed in said center section, comprising
- (a) check valves mounted in said center section and operatively connected to said hydraulic circuit, each said valve having a check ball mounted therein, said check valves having an open and closed position;
- (b) a filter housing mounted on said transmission adjacent to said check valves;
- (c) an actuation member mounted in said filter housing, said actuation member having a plurality of projections for contacting said check balls;
- (d) a bypass actuation rod mounted external to said filter housing and rotatable to engage said actuation member to force said projections into contact with said balls to place hydrostatic transmission into bypass.
Dependencies are inferred from the claim text.