US 12,006,924 B2
Axial piston pump mounting flange configuration
Matthew G. Mickiewicz, Yorkville, IL (US); Stive Ramalho, Isle d'Abeau (FR); Darren Joseph Hopf, Peoria, IL (US); Justin Douglas Speichinger, Morton, IL (US); Paul Alan Rousseau, Clayton, NC (US); and Brice Mallein, Coublevie (FR)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on Aug. 4, 2021, as Appl. No. 17/393,685.
Prior Publication US 2023/0043842 A1, Feb. 9, 2023
Int. Cl. F04B 1/2064 (2020.01); F04B 53/22 (2006.01); F04C 11/00 (2006.01)
CPC F04B 1/2064 (2013.01) [F04B 53/22 (2013.01); F04C 11/005 (2013.01); F04C 2270/03 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A hydraulic pump or motor comprising:
a shaft defining a longitudinal axis, a Y-axis extending upwardly and orthogonally from the longitudinal axis, and an X-axis extending orthogonally to the longitudinal axis, and the Y-axis;
a housing defining a first longitudinal end, a second longitudinal end, and a cavity that extends from adjacent the first longitudinal end toward the second longitudinal end;
a plurality of mechanical components including one hydraulic interacting component that are disposed in the cavity; and
an inlet and an outlet that are in fluid communication with the cavity, the inlet and the outlet being disposed at the second longitudinal end;
wherein a mounting flange is disposed at the first longitudinal end of the housing, the shaft extends from the cavity past the first longitudinal end of the housing and through the mounting flange, the mounting flange comprising a rectangular shape with corners and defining four fastener receiving apertures arranged generally in respective corners of the rectangular shape, the four fastener receiving apertures having radius centers that are arranged in a rectangular pattern having two sides defined by an X dimension and two sides defined by a Y dimension equal to the X dimension, and a pilot projection that extends longitudinally away from the mounting flange or a pilot recess extending longitudinally into the mounting flange, defining a pilot projection diameter or a pilot recess diameter, and a ratio of the X dimension to the pilot projection diameter ranges from 1.07 to 1.11, or a ratio of the X dimension to the pilot recess diameter ranges from 1.07 to 1.11.