Variable height column with integral actuating means

Details Variable height column with integral actuating means Variable height column with integral actuating means

1984-12-21

1987-08-18

Garrett, Robert E.

Expansible chamber devices

Moving cylinder

92146, 91217, 384 42, F01B 1502, F01B 100

Patent

active

046868895

ABSTRACT:
A variable height column having a base, a midsection and an upper section. The base includes at least one upwardly extending guide shaft and the upper section includes at least one downwardly extending guide shaft. The midsection includes guide paths and bearings dimensioned for sliding engagement with the guide shaft. Hydraulic actuating means are provided to move the midsection vertically relative to the base and to move the upper section vertically relative to the midsection at the same rate to permit the uniform straightline extension and retraction of the column.

REFERENCES:
patent: 180252 (1876-07-01), McClunie
patent: 628953 (1899-07-01), McConville
patent: 2393503 (1946-01-01), Bosomworth et al.
patent: 2490625 (1949-12-01), Hall
patent: 2546462 (1951-03-01), Link
patent: 2821264 (1958-01-01), Ulinski
patent: 3537762 (1970-11-01), Lodige

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