Valve arrangement for controlling the stroke of a telescoping pr

Details Valve arrangement for controlling the stroke of a telescoping pr Valve arrangement for controlling the stroke of a telescoping pr

1980-02-14

1982-08-17

Maslousky, Paul E.

Motors: expansible chamber type

Extension of unit having separately controlled working...

Control of motive fluid for one working member in response...

91446, 91452, F15B 1118

Patent

active

043443540

ABSTRACT:
The telescopically extendable prop (1) has at the periphery of the intermediate prop (3) abutments (30) which cooperate with a valve (15) before the intermediate prop (3) has attained its highest extended position. The valve (15) stops the extending stroke of the intermediate prop (3) and is releasing the beginning of the extending stroke of the top prop (4). As soon as a predetermined pressure is built up in the consolidating conduit (10) of the top prop (4), the valve (27) subjected to this pressure is overacting the valve (15) cooperating with the abutments (30) of the intermediate prop (3), whereupon the consolidating stroke is completed by pressurizing the intermediate prop (3) with pressurizing fluid. (FIG. 1)

REFERENCES:
patent: 1963286 (1934-06-01), Ballert
patent: 2716965 (1955-09-01), Klamp
patent: 3188917 (1965-06-01), Auoyle
patent: 3832937 (1974-09-01), Moore et al.
patent: 4191092 (1980-03-01), Farmer

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