Fluid flow control valve
OwnerAndrew Mark Brothers, David John Hortoninventors
Life of this patent
Estimating the term…
Abstract
A fluid flow control valve suitable for fitting to the fuel line (16, 18) of an internal combustion engine has a valve member (12) and a spring (14) urging the valve member (12) to a closed position where the valve member seals against a valve seat (13). A key-actuated setting mechanism (20, 21) allows the valve member (12) to be moved away from its closed position to an open position and a latch (31, 32) then holds the valve member in that open position. An electrically operated release (33) moves the latch (31) to free the valve member and permits the valve to close under the action of the spring (14). When fitted to a vehicle, energy may be provided to the release (33) automatically whenever the vehicle is left unattended so as to immobilise the vehicle.
Claims25
A fluid flow control value including a fluid passage in which is provided valve seat, a valve member and a spring urging the valve member to a closed position where the valve member seals against the valve seat, the valve further comprising a key-actuated setting mechanism arranged upon operation with a key to move the valve member away from the closed position to an open position, latch means to restrain the valve member in the open position when moved there by the setting mechanism, and electrically-operable release means for the latch means whereby operation of the release means frees the valve member to move under the action of the spring from the open position to the closed position.
A fluid flow control valve including a fluid passage in which is provided a valve seat, a valve member and a spring urging the valve member to a closed position where the valve member seals against the valve seat, the valve further comprising a setting mechanism arranged upon operation to move the valve member away from the closed position to an open position, the setting mechanism including a key-operated lock mechanism having first and second positions, the key being restrained against withdrawal from the lock mechanism other than when the lock mechanism is at the first position, and movement of the lock mechanism by the key from the first position to the second position serving to move the valve member to said open position, latch means to restrain the valve member in the open position when moved there by the setting mechanism, and electrically-operable release means for the latch means whereby operation of the release means frees the valve member to move under the action of the spring from the open position to the closed position.
Dependencies are inferred from the claim text.