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US 4,289,164 AGranted
Coupling device
AssigneeEkman Engineering AG
InventorKjell R. Ekman
Life of this patent
Estimating the term…
Abstract
A coupling device has two connectable and disconnectable coupling parts. A first of said coupling parts is provided with a centrally arranged body and an inner casing slidingly arranged between two positions relative to the central body. In a first or disconnected position, the inner casing cooperates with the central body to keep closed a passage for a fluid medium through the first coupling part. A second of said coupling parts has a front section interactable with the inner casing in order to force the inner casing to a second position against the force of a spring which urges the casing towards the body. In the second or connected position of the inner casing, the passage for the fluid medium is opened.
Claims21
A coupling device for supplying fluid from a pressurized source to an output conduit without fluid leakage, said coupling device comprising:
- a first coupling part having a flow passageway extending therethrough;
- a second coupling part having a further flow passageway extending therethrough, said flow passageways forming a continuous flow passageway through said coupling device as said coupling parts are detachably coupled to one another to permit fluid flow through said coupling device;
- a first valve body extending within said first coupling part in a direction parallel to a longitudinal axis through said first coupling part, said first valve body being fixedly attached to said first coupling part and including a first, enlarged end portion formed thereon;
- a second valve body slidably disposed within said second coupling part and including a second end portion contacting said first, enlarged end portion as said first and second coupling parts are detachably coupled to one another;
- a hollow casing slidably arranged within said first coupling part so as to selectively surround portions of said first valve body, said hollow casing including a cylindrically-shaped surface portion perpendicularly spaced from said longitudinal axis a distance which is less than a perpendicular distance between a side surface of a flange mounted on said first, enlarged end portion and said longitudinal axis, providing for selective contact between said hollow casing and said side surface of said flange to block fluid flow completely through said first coupling part;
- said hollow casing further including an outer surface having a raised surface portion extending in a radially outwardly direction toward a surrounding portion of said first coupling part, with biasing means positioned between an interior portion of said first coupling part and a portion of said hollow casing for biasing said hollow casing into surface contact with said side surface of said flange;
- said coupling device further including a cover assembly slidably disposed within said first coupling part and encircling said casing, said cover assembly including an elongated flange extending in a radially inwardly direction from a first end of said cover surrounding said first, enlarged end portion, said cover assembly further including a second end axially spaced from said first, enlarged end portion;
- said elongated flange having an inner end surface spaced from said longitudinal axis a perpendicular distance less than a perpendicular distance between said raised surface portion and said longitudinal axis, said elongated flange further including a first side wall portion facing said raised surface portion and extending in a direction substantially perpendicular to said longitudinal axis and said elongated flange including a second side wall surface facing away from said raised surface and inclined toward said first side surface as the distance towards said inner end surface decreases;
- and said coupling device includes
- further biasing means extending between an interior wall portion of said first coupling part and said second end of said cover member for biasing said elongated flange into a position radially aligned with said flange mounted on said first, enlarged end portion;
- whereby said second coupling part contacts and presses said elongated flange toward said further biasing means as said coupling parts are detachably coupled to one another, with said elongated flange contacting said raised surface portion of said hollow casing to slide said hollow casing out of contact with said first, enlarged end portion to allow fluid flow through said first coupling part.
8 more elements
A coupling device for supplying fluid from a pressurized source to an output conduit without leakage, said coupling device comprising:
- a first coupling part having a flow passageway extending therethrough;
- a second coupling part having a further flow passageway extending therethrough, with said flow passageways forming a continuous flow passageway through said coupling device as said first and second coupling parts are detachably coupled to one another;
- a first valve body extending within said first coupling part in a direction substantially parallel to a longitudinal axis through said first coupling part, said first valve body fixedly engaging said first coupling part and including a first enlarged end portion formed thereon;
- a second valve body arranged within said second coupling for sliding movement parallel to a longitudinal axis through said second coupling part and including a second end portion selectively engaging said first, enlarged end portion as said coupling parts are detachably coupled to one another;
- said coupling device further comprising a hollow casing slidably disposed within said first coupling part so as to selectively surround portions of said first valve body;
- said hollow casing including a cylindrically-shaped inner surface portion extending parallel to said longitudinal axis and spaced from said first valve body, said hollow casing further including an end surface extending perpendicular to said longitudinal axis and joining said cylindrically-shaped inner surface portion;
- said coupling device further comprising a cover assembly slidably arranged within said first coupling part and positioned between said hollow casing and an interior surface of said first coupling part, said cover assembly including an elongated flange extending in a radially inwardly direction from a first end of said cover assembly surrounding the first enlarged end portion of said first coupling part, said cover assembly further including a second end axially spaced from the first enlarged end portion of said first coupling part;
- said coupling device further comprising sealing means for providing a fluid-tight seal between said first valve body and said hollow casing to prevent fluid from flowing through said first coupling part when detached from said second coupling part;
- said sealing means comprising a flange circumferentially surrounding and projecting outwardly from said first, enlarged end portion of said first coupling part, said flange having a side surface extending perpendicular to said longitudinal axis a distance sufficient to intersect a projected path of travel of said end surface of said hollow casing;
- said sealing means further comprising a deformable sealing ring mounted in a circumferentially disposed groove formed in an outer surface of said first, enlarged end portion, said deformable sealing ring including a portion extending beyond said groove a distance sufficient to intersect said projected path of travel of said cylindrically-shaped inner surface portion of said hollow casing;
- and
- said sealing means further comprising resilient biasing means extending between an interior wall portion of said first coupling part and a portion of said hollow casing for biasing said perpendicular end surface of said hollow casing into surface contact with said perpendicularly extending side wall while biasing said cylindrically-shaped inner surface into fluid-tight contact with said deformable sealing ring so as to block the flow of fluid between said hollow casing and said first valve body.
9 more elements
Dependencies are inferred from the claim text.