US 4,552,333 A · Bayonet catch for a line of pressurized medium

Abstract

A bayonet catch for a line of pressurized medium, comprising a tubular body (10), a lever (1) journalled pivotably to the body for turning a valve means (12), as well as coupling elements (4, 9) at the forward end of said body for disconnectable coupling of a connecting plug (11), said coupling elements comprising a push-pull sleeve surrounding the forward end of the body. A problem with pneumatic line bayonet catches is that, when a catch is opened, the outlet side pressure strikes at great force out of a releasing plug with a consequence that the disconnected line end may get out of hand and cause damage. The problem has been resolved in a manner that lever (1) positively operates both said valve means (12) for opening and closing a valve and said push-pull sleeve (4) for coupling and uncoupling said connecting plug (11), and that between valve means (12) and a connecting plug sealing member (8) said body (10) is provided with a passage (14) which in the open position of said valve is closed by a seal (6) of push-pull sleeve (4) but in the closed position of said valve, prior to the displacement of said push-pull sleeve into the position for disconnecting said connecting plug (11), said seal (6) withdraws from in front of passage (14) for allowing the outlet side pressure to discharge to atmosphere.

Claims7

Dependent claims

The combination of a manually operated valve and a bayonet type conduit to plug connection, said valve having a body with a fluid passes therethrough;

a rotatable valve element mounted within said body for closing said passage and a lever external of said body connected to said valve element for rotation thereof between opened and closed positions, said valve body having a plug receiving tubular portion at one end of said passage and a sleeve surrounding said portion and slidable lengthwise of said portion;
a bleed passage in said portion between said rotatable valve and said one end and communicating with said passage;
said sleeve having closure means seating over said bleed passage when said sleeve is in plug locking position, a discharge passage in said sleeve positioned to communicate with said bleed passage when said sleeve is retracted toward said rotatable valve;
means secured to said rotatable valve element for rotation therewith, said means engaging said sleeve for shifting said sleeve to connect said bleed passage and discharge passage after said rotatable valve element has reached a closed position and before moving the sleeve of plug release position whereby fluid pressure in the passage and coupling is released before the uncoupling the plug.

1 more element

In means for depressurizing the downstream side of a combination valve and bayonet plug connection for pressurized fluids, a valve body having a fluid passage therethrough, said bayonet connection being at the downstream end of said passage, a rotatable valve element intermediate the ends of said passage and actuator means for rotating said valve, said bayonet connection including a sleeve, said sleeve having a plug engaging and securing means, said sleeve being slidable axially of the passage, said sleeve including locking means for holding said securing means against plug release;

a bleed opening communicating with the fluid passage between said securing means and valve, said sleeve having closure means for closing said bleed opening, a lost motion connection means between said actuator means and said sleeve, said connection means holding said sleeve with said closure means closing said bleed opening and said holding means in locking engagement with said securing means when said valve is rotated to open position;
as said actuator is initially moved to close said valve, said lost motion connection means holding said sleeve stationary until said valve has closed the passage and thereafter sequentially shifting said sleeve to open said bleed passage and thereafter shifting said holding means into securing means release position whereby the plug can be removed.

Dependencies are inferred from the claim text.

Bayonet catch for a line of pressurized medium

Life of this patent

Bayonet catch for a line of pressurized medium

Life of this patent

Abstract

Claims7