Movable blade pump
AssigneeHitachi, Ltd.
InventorsSumio Sudo, Hiromichi Anan, Masayuki Yamada
Life of this patent
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Abstract
A movable blade pump including an actuating mechanism for imparting rotational movement to blades which mechanism is contained in an impeller boss sealed against the outside and filled with hydraulic fluid and is driven by a hydraulic cylinder device secured to a suction casing below the impeller boss. Feed and discharge of hydraulic fluid into and from the hydraulic piston device are effected through fluid passages formed in the suction casing and a fixed mounting for the hydraulic fluid device, and the blades are set at any angular positions within the range of the stroke of the piston.
Claims5
A movable blade pump comprising:
- a hydraulic cylinder chamber secured to a suction casing for mounting a hydraulic cylinder;
- a piston mounted in said hydraulic cylinder;
- a non-rotating actuating shaft secured at one end portion thereof to the piston and formed at the other end portion thereof with a connection;
- a solid rotary actuating shaft supported by the connection of the non-rotating actuating shaft and connected to an impeller boss mounted on a main shaft for rotation therewith;
- blades rotatably supported by the impeller boss;
- and
- a control mechanism for converting the up and down movement of the rotary actuating shaft into the rotational movement of the blades.
Dependencies are inferred from the claim text.