Piston-type accumulator for a hydraulic fluid to be supplied to a consumer in a hydraulic installation
AssigneeHydac Technology GmbH
InventorsJosef Scholl, Herbert Baltes
Life of this patent
Estimating the term…
Abstract
A piston accumulator can be used for hydraulically actuating the discharge unit in non-automotive bulk commodity vehicles. The accumulator cylinder has a tappet which can be axially displaced within the cylinder. When a defined load pressure is reached in the oil chamber of the cylinder, the tappet can be displaced by a piston to actuate a control valve. The valve serves as shut-off device for the loading fluid stream flowing to the oil chamber and is positioned as a detachable module on the exterior face of cylinder cover in such a way that it can be actuated by the outer end of the tappet. The tappet is guided towards the outside by passing in a sealed manner through the cylinder cover.
Claims20
A piston accumulator for hydraulic fluid to be supplied to a consumer in a hydraulic installation, comprising:
- a cylinder having an oil chamber, a gas chamber and a cylinder cover defining one end of said gas chamber;
- a piston mounted in said cylinder to divide said cylinder into said oil chamber and said gas chamber;
- inlet and outlet connections on said cylinder for supplying and discharging pressurized hydraulic oil to and from said oil chamber, respectively;
- an axially movable tappet in said cylinder having an inner end cooperating with said piston and an outer end guided in said cylinder cover and accessible outside said cylinder;
- a control valve controlling fluid pressure flow into said oil chamber and being connected to said inlet connection through a bypassing conduit, said control valve being engageable with and actualable by said outer end of said tappet, said control valve being mounted detachably on an exterior of said cylinder cover;
- and
- a transverse fastened to an inner wall of said cylinder in said gas chamber, said inner end of said tappet being guided for longitudinal sliding movement in said transverse for cooperation with said piston, said traverse having at least one gas passage therein.
Dependencies are inferred from the claim text.