A fluid coupling includes a male element and a female element, which has a gear reduction member and a main body defining a main inner channel, a plunger, and a slide valve movable between a closed configuration and an open configuration. The slide valve has an outer slide valve and an inner slide valve. In the closed configuration, the outer slide valve is in a forward position and the inner slide valve is in a forward position contacting the outer slide valve and the plunger. In the open configuration, the outer slide valve is in a withdrawn position and the inner slide valve is in an offset position. The gear reduction member is disengaged from a front stop surface on the main body, a rear stop surface on the outer slide valve, or a front stop surface on the inner slide valve during a coupling phase.

A method and system for reducing leakage of hydraulic oil from a hydraulic outlet on a tractor, which involves removal of the female quick connect coupler from a legacy original equipment selective control valve and inserting into the void the following: a three part insert with a front stepped diameter segment, a back section, which is screwed into front stepped diameter segment, a sleeve which is configured to be inserted after a front O-ring is adjusted and a leading portion of a retention bolt.

A method and system for reducing leakage of hydraulic oil from a hydraulic outlet on a tractor, which involves removal of the female quick connect coupler from a legacy original equipment selective control valve and inserting into the void the following: a three part insert with a front stepped diameter segment, a back section, which is screwed into front stepped diameter segment, a sleeve which is configured to be inserted after a front O-ring is adjusted and a leading portion of a retention bolt.

A coupling system includes a female coupling device, the female coupling device including a first main body with a first front face, the first front face defining a first opening leading into a first fluid passageway; a stem having a stem head positioned within a sleeve; a first spring positioned about the stem that biases the sleeve into a closed position; a first seal that seals between the main body and the sleeve; a second seal that seals between the sleeve and the stem head; and a third seal that is positioned at the opening of the main body.

A coupling system includes a female coupling device, the female coupling device including a first main body with a first front face, the first front face defining a first opening leading into a first fluid passageway; a stem having a stem head positioned within a sleeve; a first spring positioned about the stem that biases the sleeve into a closed position; a first seal that seals between the main body and the sleeve; a second seal that seals between the sleeve and the stem head; and a third seal that is positioned at the opening of the main body.

In accordance with the present disclosure, leak of gas is suppressed when a coupler of a manifold gauge set including a gas hose is detached to a gas inlet/outlet valve of a thermal exchange equipment. To this end, the set includes a core-rod depressor extending from the coupler into the hose, and a depressor-adjustment unit disposed on the hose to adjust a position of the core-rod depressor.

In accordance with the present disclosure, leak of gas is suppressed when a coupler of a manifold gauge set including a gas hose is detached to a gas inlet/outlet valve of a thermal exchange equipment. To this end, the set includes a core-rod depressor extending from the coupler into the hose, and a depressor-adjustment unit disposed on the hose to adjust a position of the core-rod depressor.

This fluid coupling (R) comprises a female element (A) and a male element (B) able to be inserted into the female element, the female element comprising a main body (2) that defines a main inner channel (24), a plunger (64) and a slide valve (10), movable longitudinally in the main inner channel around the plunger between a closed configuration and an open configuration of the main inner channel. The male element comprises a complementary body (30) defining a complementary inner channel (302) and a valve (304) movable in the complementary inner channel between a closed off position and a separated position. In an uncoupled configuration of the fluid coupling, the slide valve is in the closed configuration and cooperates radially tightly with the main body and the valve is in the closed position. In a coupled configuration of the fluid coupling, the valve is pushed back in the separated position by the plunger and the complementary body cooperates with the slide valve. According to the invention, the slide valve comprises an outer slide valve (102) and an inner slide valve (104), which are movable relative to one another. In the closed configuration, the outer slide valve is in a forward position and the inner slide valve is in a forward position in which it is in tight contact with the outer slide valve and with the plunger. In the open configuration, the outer slide valve is in a withdrawn position and the inner slide valve is in an offset position relative to the outer slide valve. The female element comprises at least one gear reduction member (20). During a coupling phase, the gear reduction member (20) is disengaged from at least one among a front stop surface (63) arranged on the main body, a rear stop surface (124) arranged on the outer slide valve and a front stop surface (126) arranged on the inner slide valve. From the intermediate position to the withdrawn position of the outer slide valve, the gear reduction member is engaged with the front stop surface of the main body, with the rear stop surface of the outer slide valve and with the front stop surface of the inner slide valve, each gear reduction member moving the inner slide valve toward its position.

This fluid coupling (R) comprises a female element (A) and a male element (B) able to be inserted into the female element, the female element comprising a main body (2) that defines a main inner channel (24), a plunger (64) and a slide valve (10), movable longitudinally in the main inner channel around the plunger between a closed configuration and an open configuration of the main inner channel. The male element comprises a complementary body (30) defining a complementary inner channel (302) and a valve (304) movable in the complementary inner channel between a closed off position and a separated position. In an uncoupled configuration of the fluid coupling, the slide valve is in the closed configuration and cooperates radially tightly with the main body and the valve is in the closed position. In a coupled configuration of the fluid coupling, the valve is pushed back in the separated position by the plunger and the complementary body cooperates with the slide valve. According to the invention, the slide valve comprises an outer slide valve (102) and an inner slide valve (104), which are movable relative to one another. In the closed configuration, the outer slide valve is in a forward position and the inner slide valve is in a forward position in which it is in tight contact with the outer slide valve and with the plunger. In the open configuration, the outer slide valve is in a withdrawn position and the inner slide valve is in an offset position relative to the outer slide valve. The female element comprises at least one gear reduction member (20). During a coupling phase, the gear reduction member (20) is disengaged from at least one among a front stop surface (63) arranged on the main body, a rear stop surface (124) arranged on the outer slide valve and a front stop surface (126) arranged on the inner slide valve. From the intermediate position to the withdrawn position of the outer slide valve, the gear reduction member is engaged with the front stop surface of the main body, with the rear stop surface of the outer slide valve and with the front stop surface of the inner slide valve, each gear reduction member moving the inner slide valve toward its position.

A fluid coupling including a first adapter, a second adapter configured to selectively connect with and disconnect from the male adapter, an inner sleeve, a first seal between the first adapter and the inner sleeve, a second seal between the second adapter and the inner sleeve, and at least one thermally-activated seal between two of the first adapter, the second adapter, and the inner sleeve. During normal operation, the at least one thermally-activated seal may be spaced apart from at least one of the two of the first adapter, the second adapter, and the inner sleeve. At or above a predetermined temperature, the thermally-activated seal may be configured to expand to create a seal between the two of the first adapter, the second adapter, and the sleeve.