US 11,988,209 B2
Spring retainer for gear pump bearing plate
Edward W. Goy, Crystal Lake, IL (US); and Timothy J. Franckowiak, Rockford, IL (US)
Assigned to Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Dec. 3, 2021, as Appl. No. 17/541,667.
Prior Publication US 2023/0175503 A1, Jun. 8, 2023
Int. Cl. F01C 1/18 (2006.01); F02C 7/22 (2006.01); F03C 2/00 (2006.01); F03C 4/00 (2006.01); F04C 2/00 (2006.01); F04C 2/16 (2006.01); F04C 13/00 (2006.01); F04C 15/00 (2006.01)
CPC F04C 2/16 (2013.01) [F02C 7/22 (2013.01); F04C 13/00 (2013.01); F04C 15/0026 (2013.01); F04C 15/0057 (2013.01); F04C 2240/50 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A gear pump comprising:
a pair of gears having meshed teeth, one of said gears configured for connection to a source of drive;
said gears received within a housing, the housing having an inlet port configured for connection to a source of fluid and an outlet port;
each of said gears rotating within a bearing on each axial side of each said gear;
at least one bearing associated with each of said pair of gears having a plurality of springs received in recesses to bias said at least one bearing against an end face of a respective one of said gears;
a spring retention plate attached to each of said plurality of springs; and
wherein each of said plurality of springs has a holding structure received within one of a plurality of holes in said spring retention plate;
wherein each said holding structure is force fit into a respective one of said plurality of holes in said spring retention plate;
wherein each of said plurality of springs is a coil spring having enlarged coil portions at each of two axial ends and intermediate coils; and
wherein said holding structure is one of said enlarged coil portions force fit into one of said plurality of holes in said spring retention plate.