Sealing arrangement for liquid dispensing nozzle having vapor recovery

Claim 1

A liquid dispensing nozzle having a body, a spout extending from said body and having its free end for disposition in an opening of a fill pipe of a vehicle tank or the like, and means to return vapor from the tank being filled; the improvement comprising means to form a seal between the fill pipe opening and said vapor return means when said spout is disposed in the fill pipe; said sealing means including a member mounted for sliding movement along said spout; means continuously urging said member toward the free end of said spout; said member having a sealing surface formed as a sector of a sphere; first means mounted for sliding movement along said spout and rotating movement about said spout; said first means being disposed between said member and the free end of said spout; said first means being continuously positioned to engage said sealing surface of said member to form a seal therebetween; said spout having stop means disposed thereon between said first means and the free end of said spout to engage said first means when said spout is not disposed in the fill pipe to form a seal therebetween; said vapor return means communicating with a sealed space formed between said spout, said sealing surface of said member, said first means, and said spout stop means; and said first means being removed from sealing engagement with said spout stop means while remaining in sealing engagement with said member when said spout is inserted in the fill pipe by compression of said urging means, said first means forming a seal with the fill pipe independently of said member orientation to cause communication between said vapor return means and the tank being filled.