Power wrench

Tools – Wrench – screwdriver – or driver therefor – Machine

Patent

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Details

81 5724, 81 574, B25B 1346

Patent

active

054957826

ABSTRACT:
The power wrench comprises a housing (10) consisting of a head portion (11) and a drive portion (12). The drive portion (12) contains a cylinder sleeve (21) which is introduced into the housing (10) from the side facing away from the head portion (11). A pressure channel being connected to the hose connector (41) consists of a longitudinal bore (45) extending in the wall of the cylinder sleeve (21) to supply the high pressure required to the rearward cylinder chamber (36). Thereby, it is avoided that the housing (10), in the area of support, is additionally subject to hydraulic pressure. In case of bursting of the pressure duct, the cylinder sleeve (21) is still held together by the housing (10).

REFERENCES:
patent: Re33951 (1992-06-01), Junkers
patent: 4794825 (1989-01-01), Schmoyer
patent: 4805496 (1989-02-01), Wagner et al.
patent: 5003847 (1991-04-01), Wagner
patent: 5263388 (1993-11-01), Beuke
patent: 5301574 (1994-04-01), Knopp et al.

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