Emco Wheaton Gmbh

David T Fenton

Allen M Bower

Leonard W Swain

In a dispenser nozzle having, a main body portion, a filling tube projecting from one end of said main body portion, and a liquid flow passage extending through said main body and said filling tube, the filling tube being adapted to be located within the open end of a neck of a fuel storage tank of a vehicle or the like, a control valve mechanism for controlling the flow of liquid through said liquid flow passage, said mechanism including a valve operating mechanism and latching means for releasably engaging said valve operating mechanism to render said valve operating mechanism operative when engaged by said latching mechanism and inoperative when released by said latching mechanism, the improvement of sensor means mounted on said nozzle and disposed adjacent said filling tube, said sensor means communicating with said latch means to release said latch means with respect to said valve operating mechanism to render said valve operating mechanism inoperative when said filling tube is now disposed in a predetermined operative relationship within a fuel storage tank, said sensor means cooperating with said fuel storage tank when said filling tube is located in a predetermined operative relationship with respect to a fuel storage tank to permit said latch means to move to a position to engage said valve operating mechanism to render said valve operating mechanism operative to permit the flow of liquid through said liquid flow passage into said tank.

Vapor recovery nozzle with mechanical flow interlock

An automatic shut-off nozzle incorporating a vapor recovery system for recovering the displaced vapors from a gasoline storage tank or the like as the tank is being filled by the nozzle wherein the nozzle is automatically shut-off when the pressure within the vapor recovery system increases above a predetermined minimum pressure. The nozzle incorporates a latching mechanism which is releasable in response to the increase in pressure in the vapor recovery system and which is also responsive to a loss of vacuum pressure resulting from the level of the liquid in the storage tank rising above a predetermined level with respect to the nozzle. The nozzle is constructed such that the ambient pressure in the main diaphragm chamber corresponds to the pressure of the vapor recovery line so that the release mechanism for the slide is not as sensitive to the pressure in the gasoline storage tank. The nozzle also includes an improved vapor recovery shroud which incorporates a fulcrum support carried by the body of the nozzle which serves to direct the end sealing ring of the shroud into engagement with the end of the filling tube of a gasoline storage tank or the like.

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Madison, OH, United States of America

David T Fenton