Hydraulic master cylinder
AssigneeLucas Industries public limited company
InventorRobert A. Anderson
Life of this patent
Estimating the term…
Abstract
An hydraulic master cylinder has a cylinder body containing a valve of which a valve element cooperates with a valve seat carried by a piston, the piston performing a working movement, in use, to compress fluid in a pressure chamber of the body. The valve element and valve seat are relatively movable to permit opening and closing of the valve. A first abutment is arranged to set the retracted position of the piston and a second abutment, spaced from the first one in a direction opposite to the working piston movement, serves to hold the valve element in a desired open position when the piston is in its retracted position. The first and second abutments are both formed on a sleeve surrounding the piston.
Claims14
An hydraulic master cylinder comprising a cylinder body containing a valve of which a valve element cooperates with a valve seat carried by a piston slidable in the body, the piston performing a working movement, in use, to compress fluid in a pressure chamber of the body, the valve element and valve seat being relatively movable to permit opening and closing of the valve, a stop fixed to the cylinder body, a first abutment arranged to set a retracted position of the piston by engagement with the stop, and a second abutment which is spaced from and relatively fixed with respect to the first abutment in a direction opposite to the piston working movement and serves to hold the valve element in a desired open position when the piston is in its retracted position, said first and second abutments being carried by a single component, which component is distinct from, carried by and movable with said piston.
An hydraulic master cylinder comprising a cylinder body containing a valve of which a valve element cooperates with a valve seat carried by a piston slidable in the body, the piston performing a working movement, in use, to compress fluid in a pressure chamber of the body, the valve element and valve seating being relatively movable to permit opening and closing of the valve, a stop fixed to the cylinder body, a first abutment arranged to set a retracted position of the piston by engagement with the stop, and a second abutment which is spaced from the first abutment in a direction opposite to the piston working movement and serves to hold the valve element in a desired open position, when the piston is in its retracted position, by engagement with means carried by the valve element, said first and second abutments being carried by a sleeve at least partially surrounding the piston which sleeve is carried by said piston and movable therewith.
Dependencies are inferred from the claim text.