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Hilpert; Bruno
Diessenhofen, CH
No. of patents:

Patent Number Title Of Patent Date Issued
D287268 Hydraulic or pneumatic actuator unit for valves December 16, 1986
D286907 Hydraulic or pneumatic actuator unit for valves November 25, 1986
5290387 Device for welding tubular components of plastics material March 1, 1994
A device for manufacturing a welded connection of tubular components of plastics material. The ends of the components to be connected are axially aligned and held to abut with the end surfaces. The ends of the tubular components can be heated by a foldable heating device which surrounds
5037500 Method and apparatus for joining tubular plastic parts by welding August 6, 1991
A heating arrangement (2) embracing tubular parts (1a, 1b) of plastic material which have to be joined by welding, comprises electrically heatable jaws (26).A bladder (50) expandable by compressed air is arranged inside the tubular parts (1a, b), which includes a centrally arranged tensi
4667928 Shut-off valve with spherical plug May 26, 1987
A shut-off valve assembly includes a housing which has a spherical plug arranged in a chamber. The housing has an internal thread into which a support element for a sealing member is screwed. On the outer end face of the support element is supported a flange bushing by means of a retaini
4647003 Remote control actuating device for a valve March 3, 1987
An actuating device operated by a pressure medium, such as compressed air, acting within a housing, can be secured to a valve by a mounting member attached to the valve. The actuating device includes a first piston guided in a cylinder part positioned on one side of the center part of th

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