Patent ID: 6769460
Filing Date: 2004-08-03
Classification: B67D,Y10T

Abstract:
A device for controlling the recovery of vapour at stations for the dispensing of liquid fuels, e.g. petrol of various grades, from a first tank or container to a second tank or container by the intermediary of a pump and a line and/or hose with a nozzle, e.g. a pistol valve, and with a channel and/or hose for the recovery and recycling of vapour from the second tank or container to the first, tank or container, or some other auxiliary aid for managing the vapour, wherein a valve is disposed in the line or hose between the pump and the nozzle and includes at least one through flow channel (14-19) for the fuel and at least one through flow channel (13) for the vapour which is to be recovered, the valve has a valve cone (12) and a valve seat (11), and the valve cone (12) is switchable against the action of a spring (9) from closure abutment against the valve seat corresponding to the fuel flow occurring in the through flow channel (14-19), so that vapour is recovered and recycled via the valve seat (11) in proportion to the fuel flow, characterised in that the valve cone (12) is disposed on the end of a piston rod (10) whose opposite end extends through a cylinder cavity and out of a cylinder top (5) and that said piston rod (10) has a plate (8) for movement in the cylinder cavity and co-operation with the cylinder wall (6).