Cushioned hydraulic lift mechanism with slot in cylinder wall

Details Cushioned hydraulic lift mechanism with slot in cylinder wall Cushioned hydraulic lift mechanism with slot in cylinder wall

1993-06-24

1995-10-31

Ryznic, John E.

Motors: expansible chamber type

Working member position responsive motive fluid control

Exhaust control

188315, 29734419, F15B 1522, A47C 102, A61G 1500

Patent

active

054619653

ABSTRACT:
A hydraulically operated piston apparatus including an outer cylinder having an inner telescopically received piston rod. An elongated slot forms a hydraulic fluid outlet through the wall of the cylinder adjacent the closed end of the cylinder. The piston extends from the open end of the cylinder and, in one aspect of the invention, is rigidly secured to an examination chair to provide for vertical adjustment of the chair. One end of the piston is adapted to gradually block the elongated fluid outlet slot to provide for smooth, linear deceleration of the piston to a stop at the end of its stroke.

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