US 10,890,174 B2
Hydrostatic system providing volumetric efficiency when pump is neutral
Joshua Cronbaugh, Ames, IA (US)
Assigned to Danfoss Power Solutions Inc., Ames, IA (US)
Filed by Danfoss Power Solutions Inc., Ames, IA (US)
Filed on Dec. 12, 2018, as Appl. No. 16/217,159.
Prior Publication US 2020/0191138 A1, Jun. 18, 2020
Int. Cl. F04B 49/08 (2006.01); F04B 49/24 (2006.01); F04B 49/035 (2006.01); F04B 49/02 (2006.01)
CPC F04B 49/08 (2013.01) [F04B 49/022 (2013.01); F04B 49/035 (2013.01); F04B 49/24 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A hydrostatic system, comprising:
a pump with a discharge conduit and a supply conduit, wherein the discharge conduit and the supply conduit are outside the pump; and
a valve connected between the discharge conduit and the supply conduit;
wherein the valve is adapted to selectively move to a position having a cross port orifice when the pump is in neutral allowing a flow between the discharge conduit and the supply conduit, and a pair of end positions that each block a connection between the discharge conduit and the supply conduit.