US 11,724,461 B2
Pressing tool, system and method for producing a tight connection of a press connector to a workpiece
Jörg Rosenthal, Reichshof-Eckenhagen (DE); Nico Schellenberg, Olpe (DE); and Uwe Grünkemeier, Kaarst (DE)
Assigned to Viega Technology GmbH & Co. KG, Attendorn (DE)
Appl. No. 17/760,688
Filed by Viega Technology GmbH & Co. KG, Attendorn (DE)
PCT Filed Sep. 2, 2020, PCT No. PCT/EP2020/074394
§ 371(c)(1), (2) Date Mar. 15, 2022,
PCT Pub. No. WO2021/052751, PCT Pub. Date Mar. 25, 2021.
Claims priority of application No. 10 2019 124 845.0 (DE), filed on Sep. 16, 2019.
Prior Publication US 2022/0388253 A1, Dec. 8, 2022
Int. Cl. B29C 65/56 (2006.01); B29C 65/00 (2006.01); B29L 23/00 (2006.01)
CPC B29C 65/565 (2013.01) [B29C 66/1142 (2013.01); B29C 66/5221 (2013.01); B29C 66/8242 (2013.01); B29C 66/84 (2013.01); B29L 2023/22 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A system for producing a tight connection of a press connector to a workpiece, the system comprising:
a pressing tool for pressing a press connector; and
a pressure tool for driving the pressing tool,
wherein the pressure tool is arranged to output a hydraulic pressure at a pressure generation location, wherein the pressing tool is arranged to receive a hydraulic pressure at a pressing location and to press a press connector accordingly, and wherein the pressure tool and the pressing tool are connected via a hydraulic pressure transmission connection, and
wherein the pressure generation point and the injection point being remote from each other, wherein the pressing tool comprises at least two opposing pressing sections with a variable distance to each other and a pre-tensioning member, wherein the pressing tool is arranged to take at least three states, wherein in a first state the pre-tensioning member is tightened and the pressing sections are spaced apart, wherein, in a second state, the pressing sections are tightened by relaxing the pre-tensioning member into engagement with a press connector, wherein in a third state the press sections exert a lifting force towards each other on the press connector, and wherein in the second state, the press connector is connected in a twist-proof manner to a workpiece to be connected.