Valved coupling

Claim 2

In a socket of the character described for releasable engagement with an adapter wider than said enlargement and with the other end of the aperture narrower the socket has a body equipped with means to engage the adapter and an actuating sleeve embracing the body is biased to move axially from a release position to a second position at which it locks the engagement means and wherein a lanyard is operatively connected to the actuating sleeve to move the actuating sleeve from its second position to its first position, the improvement to make the lanyard releasable from the actuating sleeve, comprising: said lanyard having an enlargement on its inner end; said actuating sleeve having a keyhole aperture therein with one end of the aperture wider than said enlargement and with the other end of the aperture narrower than the enlargement, said lanyard normally extending through said narrow end of the keyhole aperture for pulling the actuating sleeve to its release position; said body having a circumferential outer shoulder inside the actuating sleeve positioned to block movement of the lanyard enlargement out of the narrow end of the keyhole aperture, said circumferential shoulder having a recess dimensioned to clear the lanyard enlargement whereby the actuating sleeve may be rotated to register the keyhole aperture with said recess to permit the lanyard enlargement to be moved through the recess into the wider end of the keyhole aperture for release from the actuating sleeve.

Claim 3

An improvement as set forth in Claim 1 in which said narrow end of the keyhole aperture is cut away to permit the lanyard to extend through the actuating sleeve at a relatively low angle with respect to the longitudinal axis of the sleeve.

Claim 4

In a coupling for releasable engagement with a passage member for conveyance of a stream of fluid, the combination of: a cylindrical coupling body forming a fluid passage; a pin extending diametrically across said passage; a pair of valve leaves hingedly mounted on the pin inside the coupling body to swing between open positions at which the leaves are close together to permit fluid flow through the body and closed positions at which the two leaves are spread apart to oppose fluid flow in an axial direction from one end of the body, said leaves at their closed positions being divergent towards said one end of the body with each leaf inclined towards said one end of the body at an acute angle to the axis of the body with the outer edges of the leaves substantially conforming to the inner circumferential surface of the body whereby the greater the pressure of the fluid at the closed position of the valve leaves, the greater the pressure of the valve leaves against said inner circumferential surface; spring means biasing the two leaves divergeNtly towards their closed position; a flexible hose with the coupling body mounted on the end of the hose; means on said body to releasably engage said passage member; an actuating sleeve embracing the body and movable between a first released position and a second locking position at which it locks the engagement means; and two circumferential radial flanges integral with said body adjacent the opposite ends of the actuating sleeve, said flanges extending radially outward beyond the radius of the actuating sleeve to protect the actuating sleeve when the hose with the body thereon is dropped onto a hard surface.

Claim 5

In a coupling for releasable engagement with a passage member for conveyance of a stream of fluid, the combination of: a cylindrical coupling body forming a fluid passage; a pin extending diametrically across said passage; a pair of valve leaves hingedly mounted on the pin inside the coupling body to swing between open positions at which the leaves are close together to permit fluid flow through the body and closed positions at which the two leaves are spread apart to oppose fluid flow in an axial direction from one end of the body, said leaves at their closed positions being divergent towards said one end of the body with each leaf inclined towards said one end of the body at an acute angle to the axis of the body with the outer edges of the leaves substantially conforming to the inner circumferential surface of the body whereby the greater the pressure of the fluid at the closed position of the valve leaves, the greater the pressure of the valve leaves against said inner circumferential surface; spring means biasing the two leaves divergeNtly towards their closed position; a flexible hose with the coupling body mounted on the end of the hose; means on said body to releasably engage said passage member; an actuating sleeve embracing the body and movable between a first released position and a second locking position at which it locks the engagement means; and two circumferential radial flanges integral with said body adjacent the opposite ends of the actuating sleeve, said flanges extending radially outward beyond the radius of the actuating sleeve to protect the actuating sleeve when the hose with the body thereon is dropped onto a hard surface.

Claim 6

In a coupling for releasable engagement with a passage member for conveyance of a stream of fluid, the combination of: a cylindrical coupling body forming a fluid passage; a pin extending diametrically across said passage; a pair of valve leaves hingedly mounted on the pin inside the coupling body to swing between open positions at which the leaves are close together to permit fluid flow through the body and closed positions at which the two leaves are spread apart to oppose fluid flow in an axial direction from one end of the body, said leaves at their closed positions being divergent towards said one end of the body with each leaf inclined towards said one end of the body at an acute angle to the axis of the body with the outer edges of the leaves substantially conforming to the inner circumferential surface of the body whereby the greater the pressure of the fluid at the closed position of the valve leaves, the greater the pressure of the valve leaves against said inner circumferential surface; spring means biasing the two leaves divergently towards their closed positions; engagement means to engage the passage member; an actuating sleeve embracing the body and movable between a first release position and a second locking position at which it locks the engagement means, said actuating sleeve being biased to its second locking position; and a lanyard to retract the actuating sleeve to its first release position, said lanyard having an enlargement on its inner end, said actuating sleeve having a keyhole aperture therein with one end of the aperture wider than said enlargement and with the other end of the aperture narrower than the enlargement, said lanyard normally extending through said narrow end of the keyhole aperture for pulling the actuating sleeve to its release position, said body having a circumferential outer shoulder inside the actuating sleeve positioned to block movement of the lanyard enlargement out of the narrow end of the keyhole aperture, said circumferential shoulder having a recess dimensioned to clear the lanyard enlargement whereby the actuating sleeve may be rotated to register the keyhole aperture with said recess to permit the lanyard enlargement to be moved through the recess into the wider end of the keyhole aperture for release from the actuating sleeve.

Claim 7

In a coupling for releasable engagement with a passage member for conveyance of a stream of fluid, the combination of: a cylindrical coupling body forming a fluid passage; a pin extending diametrically across said passage; a pair of valve leaves hingedly mounted on the pin inside the coupling body to swing between open positions at which the leaves are close together to permit fluid flow through the body and closed positions at which the two leaves are spread apart to oppose fluid flow in an axial direction from one end of the body, said leaves at their closed positions being divergent towards said one end of the body with each leaf inclined towards said one end of the body at an acute angle to the axis of the body with the outer edges of the leaves substantially conforming to the inner circumferential surface of the body whereby the greater the pressure of the fluid at the closed position of the valve leaves, the greater the pressure of the valve leaves against said inner circumferential surface; spring means biasing the two leaves divergently towards their closed positions; engagement means to engage the passage member; an actuating sleeve embracing the body and movable between a first release position and a second locking position at which it locks the engagement means, said actuating sleeve being biased to its second locking position; and a lanyard to retract the actuating sleeve to its first release position, said lanyard having an enlargement on its inner end, said actuating sleeve having a keyhole aperture therein with one end of the aperture wider than said enlargement and with the other end of the aperture narrower than the enlargement, said lanyard normally extending through said narrow end of the keyhole aperture for pulling the actuating sleeve to its release position, said body having a circumferential outer shoulder inside the actuating sleeve positioned to block movement of the lanyard enlargement out of the narrow end of the keyhole aperture, said circumferential shoulder having a recess dimensioned to clear the lanyard enlargement whereby the actuating sleeve may be rotated to register the keyhole aperture with said recess to permit the lanyard enlargement to be moved through the recess into the wider end of the keyhole aperture for release from the actuating sleeve.