초록 ▼

A breakaway hose coupling for application within a fuel line, that prevents untimely decoupling, and avoids unnecessary leakage. The coupling includes a pair of fittings, for connecting to the fuel line, a sleeve provided for limited sliding movement upon one of the fittings, with each fitting incor

A breakaway hose coupling for application within a fuel line, that prevents untimely decoupling, and avoids unnecessary leakage. The coupling includes a pair of fittings, for connecting to the fuel line, a sleeve provided for limited sliding movement upon one of the fittings, with each fitting incorporating a poppet valve, to provide for closure when decoupling occurs, or other unseating, from within the respect fittings, during normal coupling assembly and usage. Detents are provided within one of the fittings for interconnecting within a seating groove provided interiorly of the sleeve, to normally retain the coupling assembled, but various fastening rings, arranged within the sleeve and one of the fittings, provides for limited shiftable movement, occuring when tensioning force is exerted, to provide clearance for disconnection, while at the same time, said fastening rings capable of shifting, to provide for recoupling of the device together upon assembly. A fluid chamber is provided intermediate select of the fastening rings, to provide an equalization and counterbalancing of fluid pressures, when internal pressures spikes generated within the coupling and hose line occur, so as to prevent untimely disconnection, or leakage from the coupling, during routine usage.

대표청구항 ▼

A breakaway coupling for application within a fuel flow line, and of the type that normally remains connected when subject to routine flow of fuel therethrough, but capable of disconnection when an excessive external tensioning force is exerted upon the line and its coupling, said coupling including

A breakaway coupling for application within a fuel flow line, and of the type that normally remains connected when subject to routine flow of fuel therethrough, but capable of disconnection when an excessive external tensioning force is exerted upon the line and its coupling, said coupling including a first fitting for coupling to one of a flow line and nozzle, and a second fitting for connecting to the other of a flow line and nozzle, a pair of valve means, one of each valve means shiftably disposed within each fitting, each fitting having a valve seat for seating of its respective valve means after decoupling, one of said valve means having an extension therewith, and disposed for encountering the other valve means during routine coupling to hold the valve means unseated from the valve seats and allowing fuel to pass through the flow line and the breakaway coupling during normal usage, a sleeve shiftably supported on said first fitting, a stationary means retained within said sleeve and providing a stop against movement in one direction of said first fitting within said sleeve, said first fitting extending through said stationary means, a boss means slidably mounted on said extending fitting and disposed for engagement by said second fitting when the coupling is maintained in engagement, spring means provided upon said fitting extension and maintained between said boss means and the stationary means, said sleeve having detent seat means provided therein, and said second fitting having at least one detent disposed for seating within said detent seat means, and being retained therein by said means during routine coupling, whereby upon exertion of external tensioning force tending to separate the two fittings, the first fitting and its boss means longitudinally shift away from the second fitting to provide unseating of the detent and disconnection of the hose coupling, while the valve means attain a seating upon the respective valve seats to prevent further flow of fuel therethrough.