.~ Axial thrust balancing means for rotary pump and motor
DEFINITION
Classification: 417/365
(under subclass 321) Apparatus in which the pump has a pumping member and the motor has a working member, each of said members rotating about a common axis, there being provided means for applying an axial force (i.e., in the longitudinal direction of said axis of rotation) to said pumping and working members in opposition to the combined net axial force produced by said pumping and working members.
(1) Note. This definition does not include a mere design of the pump and motor rotors so as to provide zero axial thrust. There must be provided some special means such as a separate fluid reaction surface or spring, etc., to be included under this definition.
