Abstract: A hydraulic jack includes a body (1) with front (2) and rear (3) covers and a rod (4) moving relative to said body (1) and having at least one projection made therein and mounting an additional member (7) and at least two grooves which form the respective projection (8) and of which each accomodates piston semi-rings (6) installed therein by pairs, the rod (4) portion having the projections (8) and the grooves forming a piston unit (5).
Type:
Grant
Filed:
July 5, 1983
Date of Patent:
September 13, 1988
Assignee:
Spetsialnoe Konstruktorskotekhnologicheskoe Bjuro Glavmosinzhstroja Pri Mosgorispolkome
Inventors:
Sergei M. Grigoriev, Alexandr N. Semenov, Vladimir P. Samoilov, Tom P. Sadovsky, deceased