Method and apparatus for reducing operating noise in axial...

Details Method and apparatus for reducing operating noise in axial... Method and apparatus for reducing operating noise in axial...

F - Mech Eng,Light,Heat,Weapons

01

N

172/22

F01N 1/00 (2006.01) F04B 1/20 (2006.01)

Patent

CA 1204387

Method and Apparatus for Reducing Operating Noise in Axial Piston Pumps and Motors Abstract A method and an apparatus are disclosed for reducing operating noise in axial piston pumps and motors. An elongated passage (88, 98) connects the outlet plenum (86) of the apparatus directly with each cylinder (30) during its discharge stroke, the passage being positioned between the point (68) at which the discharge stroke begins and the leading edge (78) of the discharge port (74) of the apparatus and the length and cross-section of the passage being sufficient to permit gradual attenuation of any pressure differential between each cylinder and the outlet plenum before the cylinder opens to the discharge port leading to the outlet plenum. See Figures 1 and 2.

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