초록 ▼

A system for transferring a volatile liquid fuel into a tank therefor, while avoiding passage of fuel vapors into the atmosphere. Vacuum assist means is provided including a reciprocatory, fuel actuated tandem motor and pump combination, to assure maintenance of a condition in the system which will

A system for transferring a volatile liquid fuel into a tank therefor, while avoiding passage of fuel vapors into the atmosphere. Vacuum assist means is provided including a reciprocatory, fuel actuated tandem motor and pump combination, to assure maintenance of a condition in the system which will prompt removal of fuel vapors from the tank being filled.

대표청구항 ▼

In a system for conducting a vaporizable liquid fuel from a storage tank 10, to a receiving tank 17 having a filler pipe 18, and for concurrently removing vapor from said receiving tank 17 during a fuel transfer operation, a fuel dispensing nozzle 16 adapted to removably engage said receiving tank f

In a system for conducting a vaporizable liquid fuel from a storage tank 10, to a receiving tank 17 having a filler pipe 18, and for concurrently removing vapor from said receiving tank 17 during a fuel transfer operation, a fuel dispensing nozzle 16 adapted to removably engage said receiving tank filler pipe 18 to form a vapor seal therewith, and having separate liquid 31 and vapor 32 passages therein, a hydraulic motor 13 having an elongated chamber 37 communicated with said storage tank 10 to receive a flow of fuel from the latter, said hydraulic motor 13 including a first piston 38 slidably mounted in said elongated chamber 37 for reciprocatory movement between opposed ends of said chamber 37 in response to said fuel flow being alternately introduced into the chamber respective opposed ends, a vapor pump 24 including a closed elongated chamber 47, a second piston 39 longitudinally received in said closed elongated chamber 47 for reciprocatory movement therein between respective ends of said elongated chamber 47, connecting means 20 operably engaging said respective first 38 and second 39 pistons to permit concurrent reciprocal movement thereof through the motor 13 and pump 24 elongated chambers, respectively, control valve means including at least two flow directing valves 41 and 42 communicated with said tank 10 and with the respective ends of said hydraulic motor chamber 37, said flow directing valve means 41 and 42 being operably connected 61, 62, 63 to said slidably mounted first piston 38 to be operated by the latter, and to direct sequential liquid flows through the control valve means to the respective ends of elongated chamber 37 in response to the disposition of the slidably mounted piston 38 during reciprocatory movement of the latter, and conduit means 14 communicating said two flow directing valves 41 and 42 to said nozzle 16 liquid passage 31, first vapor conduit means 23, 49, 54 communicating said nozzle vapor passage 32 with the respective opposed ends of said vapor pump 24 elongated chamber 47, check valve means 51 and 52 in said first vapor conduit means being operable to allow unidirectional flow of vapor to said elongated chamber 47 from said vapor passage 32, vapor return conduit means 56 and 58 communicating the respective elongated chamber 47 ends with said tank 10, and check valve means 53 and 57 disposed in said vapor return conduit means to permit unidirectional vapor flow to said tank 10, whereby to direct vapor flow to said tank 10 in response to reciprocatory movement of said piston 38 in said elongated chamber 47, a pressure responsive valve 48 communicating said nozzle vapor passage 32 with said tank 10, said valve 48 being operable to the open position in response to a predetermined pressure within said vapor passage 32 to bypass vapor flow around said first vapor conduit means 23, 49, 54 and said vapor return conduit means 56, 58, into said tank 10, and when said pressure responsive valve 48 is in the closed position at a pressure less than said predetermined pressure the vapor flow will be delivered from said vapor passage 32 to said vapor pump 24 elongated chamber 47.