Automatic trip fill nozzle

Claim 2

A fluid dispensing nozzle comprising a body having inlet and discharge passages, a tank fill line sealing assembly on said body discharge passage preventing fluid splashage and vapor emission in a seated position on a tank fill line, a valve mechanism including a valve assembly and a valve actuating section, a manually actuated lever coupled with said valve actuating section and adapted to actuate said valve assembly upon proper preconditioning of said manually actuated lever, and a lever actuating assembly coupled with said sealing assembly, said valve actuating section and said manually actuated lever for preconditioning said manually actuated lever for valve assembly actuation upon proper engagement of said sealing assembly with said fill pipe and fluid pressure within said valve mechanism, and for deactuation of said manually operated lever and said valve assembly upon the unseating of said sealing assembly.

Claim 3

A fluid dispensing nozzle as claimed in claim 1, and means in said discharge passage communicating with said valve mechanism for deactuation of said valve mechanism upon fluid fill or contact.

Claim 4

A fluid dispensing nozzle as claimed in claim 1, and means associated with said sealing means for removing vapors to a remote location emitted from a tank fill line.

Claim 5

A fluid dispensing nozzle as claimed in claim 1, said sealing assembly being yieldably retained on said discharge passage for seating engagement with the open end of a tank fill line.

Claim 6

A fluid dispensing nozzle as claimed in claim 1, said sealing assembly being yieldably biased on said discharge passage for seating and sealing the open end of a tank fill line, and means on said discharge passage for releasably locking the discharge passage on a tank fill line.

Claim 7

A fluid dispensing nozzle as claimed in claim 1, said valve mechanism including a spring-loaded plunger valve assembly at said inlet passage, a valve actuating section having a vacuum chamber in said body, said vacuum chamber having a pressure responsive means therein, said vacuum chamber communicating with said valve assembly to transmit a pressure differential therethrough, means in said discharge passage for transmitting a pressure differential to said vacuum chamber, means movable with said pressure responsive means connected to said lever actuating assembly whereupon seating engagement of said sealing assembly with a fill line said valve assembly may be actuated for operation and upon disengagement of said sealing means with a fill line or failure to maintain a predetermined pressure differential in said vacuum chamber, said valve assembly will be urged into a closed position.

Claim 8

A fluid dispensing nozzle as claimed in claim 6, said valve actuating section further including a fluid pressure chamber in said body having pressure responsive means therein, means associated with said pressure responsive means in said pressure chamber communicating with said inlet passage, means associated with said pressure chamber responsive means for preconditioning said lever and said lever actuating assembly for actuation and for deactuation of said valve assembly, and means for venting vapors from said discharge passage to a remote location.

Claim 9

A fluid dispensing nozzle as claimed in claim 7, said spring loaded plunger valve assembly having a restricted opening and a lever-engaging plunger extending from said valve, said pressure responsive means in said valve actuating section vacuum chamber having a diaphragm and a linkagE-actuating plunger extending therefrom, said pressure-responsive means and said luid pressure chamber having a diaphragm and a linkage-actuating plunger extending therefrom for cooperation with said linkage-actuating plunger of said vacuum chamber pressure-responsive means whereby reduction or lack of fluid pressure in said fluid pressure chamber or unseating of said sealing means or improper pressure differential in said vacuum chamber will terminate fluid flow or prevent full preconditioning for actuation of said linkage for said valve mechanism.

Claim 10

A fluid dispensing nozzle as claimed in claim 6, said sealing assembly having releasable clamping means for connection to a tank fill pipe.

Claim 11

A fluid dispensing nozzle as recited in claim 1, said valve mechanism body discharge passage having an elongated tube for insertion into a tank fill pipe, said valve actuating section including a return line therein for transmitting a pressure differential communicating with the interior of the fill pipe to detect fluid level therein, said tank fill line sealing assembly having a resiliently biased collar for cooperative sealing engagement with the open end of a fill pipe guidably supported on said tube, fill pipe latching means on said tube for releasably engaging a fill pipe in the seated position of said sealing means on a fill pipe, a venting sleeve on said tube for receiving vapors and air from said fill pipe during tank fill, means connected to said sleeve for transferring vapor and air from said sleeve to a remote location, said valve mechanism having a valve assembly in said inlet passage, said valve assembly having a spring-actuated plunger and a valve forming a restricted inlet orifice to restrict fluid flow in the valve open position, said valve actuating section further including an inlet pressure chamber communicating with said inlet passage having a pressure responsive diaphragm and connected plunger, a vacuum chamber communicating with said return line in said tube and said restricted opening having a pressure responsive diaphragm and connected plunger, said plungers being adapted for cooperation with each other for transmitting a force when suitably preconditioned with fluid pressure in said inlet passage and the absence of a fluid in said tube, said lever actuated assembly connected to said sealing assembly and at least one of said plungers, said manually actuated lever adapted to cooperate with said lever actuated assembly and said one of said plungers in said valve assembly spring actuating plunger whereby sealing assembly seating on a fill pipe and inlet fluid pressure precondition said lever actuated assembly for operation of said manual lever, and upon fluid pressure drop detected in said inlet pressure chamber below a predetermined level or unseating or said sealing assembly from said fill pipe or fluid detection in said tube said linkage will be de-activated automatically positioning the valve mechanism in an inoperative position terminating fluid flow through the nozzle body.