Guide system for a counterweight

Details Guide system for a counterweight Guide system for a counterweight

1980-04-10

1981-12-08

Footland, Lenard A.

Cutlery

308 3B, 16198, F16C 2902

Patent

active

043044425

ABSTRACT:
The invention relates to a guide system for a counterweight that is mounted in a box-shaped profile beam, in particular for blackboards. The hollow profile beam has to this purpose on its inside longitudinal guides (17 and 18). Above and below on the counterweight (20) there are provided elastomeric bands (30) with integrally vulcanized hard-rubber elements (31) that are in light sliding contact with the longitudinal guides and that guide the counterweight during its upward and downward displacement.

REFERENCES:
patent: 2490652 (1949-12-01), Sahlin
patent: 2795810 (1957-06-01), Decker et al.
patent: 3032377 (1962-05-01), Blase et al.
patent: 3402483 (1968-09-01), Jenny et al.

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