Coupling part comprising pressure-reducing means
First Claim
1. In a coupling apparatus for quick coupling including a first and a second coupling part adapted to be coupled together, said first coupling part comprising:
- an outer, tubular part, said outer part defining a first and a second chamber positioned in the longitudinal direction of said outer part adjacent to a front portion extending a distance from a face surface of said outer part;
an inner longitudinally displaceable unit positioned inside said outer part and movable between a deactivated starting position and a fully activated position in which said first and second coupling part are fully coupled, said inner longitudinally displaceable part being activated into said activated position by said second coupling part;
said inner displaceable unit having pressure reducing means including a lead-off channel means for media pressure, a shut off element positioned in said channel means and an actuation member for actuation of said shut-off element, said lead-off channel means being connectable on each side of said shut-off element to said first and second chamber;
first sealing means being provided on said inner unit for ensuring sealing between said first and second chamber, said first sealing means including said shut-off element; and
second sealing means for sealing said actuation member in said lead-off channel to prevent leakage of media to said end face of said inner unit and said first coupling part;
wherein in said deactivated position of said inner unit said first sealing means is adapted to confine said media pressure in said first chamber and in said activated position of said inner unit said shut-off element is adapted to open and said channel means connected on each side of said shut-off element allowing for releasing media pressure from said first chamber into said second chamber facilitating coupling of said first and second coupling parts even at high pressure.
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Abstract
A coupling part constituting the male or female part in a quick coupling comprises an inner, longitudinally displaceable unit positioned in an outer part of the coupling part the inner unit being adapted in a deactivated position thereof to confine the media pressure in a first chamber arranged in the outer part of the coupling part and in an actuated position to open or keep open an access for media to a second chamber in the outer part. Pressure-reducing members actuable upon coupling together of the male and female parts and allowing for the coupling even at high media pressures, and including a lead-off channel for media pressure and a shut-off element positioned in the channel, and actuable by the end face of the other coupling part through an actuation member. The actuation member is sealed-off or positioned in the coupling part in order to prevent lead-off media from reaching the end face of the coupling part. The lead-off channel on both side of the shut-off element is connectable to the first and the second chambers and upon actuation of the pressure-reducing member, the first and second chambers communicate through lateral connections in the inner unit the lead-off channel and the opened shut-off element whereby accompanying decompression of the pressure in the first chamber facilitates the longitudinal displacement of the inner unit, as a result of which it is possible to obtain leakage-free connection of the coupling parts in the presence of any media pressure.
30 Citations
17 Claims
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1. In a coupling apparatus for quick coupling including a first and a second coupling part adapted to be coupled together, said first coupling part comprising:
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an outer, tubular part, said outer part defining a first and a second chamber positioned in the longitudinal direction of said outer part adjacent to a front portion extending a distance from a face surface of said outer part; an inner longitudinally displaceable unit positioned inside said outer part and movable between a deactivated starting position and a fully activated position in which said first and second coupling part are fully coupled, said inner longitudinally displaceable part being activated into said activated position by said second coupling part;
said inner displaceable unit having pressure reducing means including a lead-off channel means for media pressure, a shut off element positioned in said channel means and an actuation member for actuation of said shut-off element, said lead-off channel means being connectable on each side of said shut-off element to said first and second chamber;first sealing means being provided on said inner unit for ensuring sealing between said first and second chamber, said first sealing means including said shut-off element; and second sealing means for sealing said actuation member in said lead-off channel to prevent leakage of media to said end face of said inner unit and said first coupling part; wherein in said deactivated position of said inner unit said first sealing means is adapted to confine said media pressure in said first chamber and in said activated position of said inner unit said shut-off element is adapted to open and said channel means connected on each side of said shut-off element allowing for releasing media pressure from said first chamber into said second chamber facilitating coupling of said first and second coupling parts even at high pressure. - View Dependent Claims (2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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6. A coupling part constituting the male or female part in a quick coupling and compressing:
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an inner, longitudinally displaceable unit positioned in an outer part of said coupling part, said inner unit being adapted in a starting, deactivated position thereof to confine the media pressure in a first chamber arranged in said outer part of the coupling part and in an actuated position said inner unit being adapted to open or keep open an access for media to a second chamber in said outer part of the coupling part; pressure-reducing means actuable upon coupling together of the male and female parts and allowing for said coupling together even at high media pressures, said pressure-reducing means comprising a lead-off channel for media pressure and a shut-off element positioned in said channel, said shut-off element being actuable by the end face of the other coupling part in said coupling through an actuation member which also constitutes a part of said pressure-reducing means, said actuation member being designed sealed-off or positioned in said coupling part in order to prevent lead-off media from reaching the end face of the coupling part; wherein said lead-off channel on both sides of said shut-off element is connectable to said first and said second chambers and wherein, upon actuation of the pressure-reducing means, said first and said second chambers form two communicating chambers through lateral connections in said inner unit, said lead-off channel and the opened shut-off element wherein accompanying decompression of the pressure in said first chamber facilitates the longitudinal displacement of the inner unit, as a result of which it is possible to obtain leakage-free connection of the coupling parts in the presence of any media pressure. - View Dependent Claims (17)
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Specification