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US 2011/0254265 A1Published application
Hydraulic connection assembly with pressure discharge control
AssigneeFaster S.p.A.
InventorPaolo Rusconi
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AssigneeFaster S.p.A.
InventorPaolo Rusconi
Estimating the term…
The present invention relates to a hydraulic connection assembly for connecting one or more hydraulic lines, of the type comprising a one-block body enclosing one or more hydraulic lines, and at least one draining line connected to said hydraulic lines. In order to allow to discharge the fluid pressure and relieve pressure from the tool lines before disconnecting or to facilitate the maneuvre of connecting the pressurized lines by the operator, the assembly according to the present invention further comprises at least one coupling provided with an axially movable element adapted to actuate line decompression means. The connection assembly according to the present invention allows to reduce the production costs and time, as well as considerably reducing the forces that the operator must apply when engaging pressurized lines.
A hydraulic connection assembly for connecting one or more hydraulic lines, of the type comprising a mono-block body enclosing one or more hydraulic lines, and at least one draining line connected to said hydraulic lines by means of pipes and, further comprising a coupling on at least one of said hydraulic lines which is provided with an axially movable element adapted to actuate said line decompression means, wherein said decompression means comprise at least one sealing member positioned on said movable element adapted to hydraulically seal said movable element against a fixed member of said coupling, and at least one or more niches obtained on said fixed member of the coupling, so that said element is movable between a first working position, in which said sealing member hydraulically seals against said fixed member, and a second decompressing position in which said sealing member is positioned at said one or more niches, non longer hydraulically sealing and allowing the fluid to pass to said draining line.
A hydraulic assembly according to the preceding claim, wherein said movable element comprises a substantially hollow, cylindrical rear body slidingly associated with said fixed member and partially inserted therein, a helical spring being further provided between said two members so as to oppose the interpenetration of the rear body within the fixed member.
A hydraulic assembly according to the preceding claim, wherein said movable element further comprises an inner body coaxially arranged to said rear body and firmly associated therewith, inserted into a ring nut and having a portion inserted into said rear body.
A hydraulic assembly according to the preceding claim, wherein said rear body is axially restrained by the presence of said ring nut, which is firmly connected to the front part of said one-piece body coaxially to the hydraulic line, said ring nut having a substantially cylindrical portion, which peripherally envelops the rear body, which thus slides with respect to the ring nut.
A hydraulic assembly according to the preceding claim, wherein said sealing member consists of a substantially annular seal.
A hydraulic assembly according to the preceding claim, wherein said seal is made of polyurethane.
A hydraulic assembly according to the preceding claim, wherein said seal has a cross section profile having at least one cusp in the sealing zone, while the base zone is rounded.
A hydraulic assembly according to the preceding claim, wherein said fixed member of said coupling consists of an adapter having a substantially hollow cylindrical shape, which is axially crossed by said hydraulic line on which the coupling is placed, associated with the rear part of said one-piece body and comprising an end portion, on which said one or more niches are obtained facing the sealing element.
A hydraulic assembly according to the preceding claim, wherein said movable element is axially movable, the axial travel thereof being restrained at the back by the abutment against the adapter and at the front by the abutment against the ring nut, the outer surface of said movable element sliding against the inner surface of said ring nut.
A hydraulic assembly according to the preceding claim, wherein it further comprises a connection pipe which allows the pressurized fluid to pass from the hydraulic line to a storing chamber when the movable element axially retracts, and which allows the oil to flow back from the storing chamber to the hydraulic line when it is moved forward.
Dependencies are inferred from the claim text.