Housing for rotary hydraulic machines
First Claim
1. A rotary hydraulic machine having a housing including a casing, a rotary group located within said casing and including barrel rotatable in said housing and having a plurality of pistons axially slideable in cylinders in said barrel, and a swashplate assembly to engage said pistons and induce reciprocation thereof as said barrel rotates to transfer fluid between a pair of ports, an actuator acting upon said swashplate to adjust the disposition thereof relative to said barrel and thereby adjust the stroke of said pistons in said barrel, and a valve to control flow to said actuator in response to control signals obtained from a control circuit having at least one sensed input thereto indicative of a parameter of said rotating group, said control circuit being located in a control housing secured to said casing and having an inwardly directed surface extending across an aperture in said casing to seal said aperture, a sensor assembly located on said surface and operatively associated with said rotating group to sense said parameter.
2 Assignments
0 Petitions
Accused Products
Abstract
A variable capacity hydraulic machine has a rotating group located within a casing and a control housing secured to the casing to extend across and seal an opening in the casing. The control housing accommodates a control circuit and a pair of sensors to sense change in parameters associated with the rotating group. One of the sensors is positioned adjacent the barrel on the rotating group to sense rotational speed and the other senses displacement of the swashplate. The control housing accommodates a control valve and accumulator to supply fluid to the control valve.
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Citations
25 Claims
- 1. A rotary hydraulic machine having a housing including a casing, a rotary group located within said casing and including barrel rotatable in said housing and having a plurality of pistons axially slideable in cylinders in said barrel, and a swashplate assembly to engage said pistons and induce reciprocation thereof as said barrel rotates to transfer fluid between a pair of ports, an actuator acting upon said swashplate to adjust the disposition thereof relative to said barrel and thereby adjust the stroke of said pistons in said barrel, and a valve to control flow to said actuator in response to control signals obtained from a control circuit having at least one sensed input thereto indicative of a parameter of said rotating group, said control circuit being located in a control housing secured to said casing and having an inwardly directed surface extending across an aperture in said casing to seal said aperture, a sensor assembly located on said surface and operatively associated with said rotating group to sense said parameter.
Specification