US 11,680,567 B1
Hydraulic gear pump with axial compensation
Hao Zhang, Twinsburg, OH (US); Satish Kumar Raju Kalidindi, Mayfield Heights, OH (US); Frank Iannizzaro, Canfield, OH (US); and Yu-Sen Chu, Westlake, OH (US)
Assigned to Parker-Hannifin Corporation, Cleveland, OH (US)
Filed by Parker-Hannifin Corporation, Cleveland, OH (US)
Filed on Nov. 18, 2020, as Appl. No. 16/951,512.
Claims priority of provisional application 62/982,307, filed on Feb. 27, 2020.
Int. Cl. F03C 2/00 (2006.01); F03C 4/00 (2006.01); F04C 2/00 (2006.01); F04C 27/00 (2006.01); F04C 2/10 (2006.01); F04C 15/00 (2006.01); F04C 23/00 (2006.01)
CPC F04C 27/006 (2013.01) [F04C 2/101 (2013.01); F04C 15/0026 (2013.01); F04C 23/008 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An assembly comprising:
a pump cover;
a thrust plate interfacing with the pump cover at a first side of the thrust plate and configured to interface with gears of a gear pump at a second side of the thrust plate; and
a seal disposed within a seal cavity formed at an interface between the thrust plate and the pump cover, wherein the seal defines multiple partitions at the interface between the thrust plate and the pump cover and seals each partition of the multiple partitions from other partitions, wherein the seal is kidney-shaped and has a square cross section when a cross section is taken along a longitudinal plane of the assembly.
 
16. A method comprising:
positioning a seal within a seal cavity formed in a thrust plate or in a pump cover of a gear pump, wherein the seal defines multiple partitions at an interface between the thrust plate and the pump cover and seals each partition of the multiple partitions from other partitions;
inserting a locating pin in a cavity formed in the pump cover, such that the locating pin protrudes axially from the pump cover, wherein the thrust plate includes a locating pin through-hole; and
mounting the thrust plate to the pump cover such that the seal is disposed therebetween, and the locating pin passes through the locating pin through-hole of the thrust plate, wherein the seal is kidney-shaped and has a square cross section when a cross section is taken along a longitudinal plane of the gear pump.