Piston pump with improved hold-down mechanism
AssigneeDynex/Rivett Inc.
InventorAnthony M. Claas
Life of this patent
Estimating the term…
Abstract
The disclosure relates to a pump having a wobble plate, at least one piston assembly reciprocated by the wobble plate, and a mechanism retaining the piston assembly in contact with the wobble plate. In the improvement, the mechanism includes a hold-down plate having a number of radially-extending retention fingers. Each finger extends into a fill opening of a separate piston assembly and retains such assembly in contact with the pump wobble plate. The piston shoe is maintained in sliding contact with the wobble plate; that is, separation of the piston assembly from the wobble plate is thereby substantially prevented.
Claims12
In a pump having (a) a wobble plate, (b) at least one piston assembly reciprocated by the wobble plate, such assembly including a piston having a fill opening, and (c) a mechanism retaining the piston assembly in contact with the wobble plate, the improvement wherein the mechanism comprises:
- a retention finger extending into the fill opening and contacting the piston assembly for retaining such assembly in contact with the wobble plate, whereby separation of the piston assembly from the wobble plate is substantially prevented.
Dependencies are inferred from the claim text.