Apparatus for actuating a braking unit
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United States of America Patent
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-
Oct 7, 1980
Grant Date -
N/A
app pub date -
Jan 16, 1979
filing date -
Jan 24, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The braking control means (33,33a) which serve to set the brakes are connected in parallel and the shut-off and lifting control means (33', 34) which permit lifting of the brakes are connected in series with the braking units (9). A single intact braking control means (33,33a) ensures braking, while all shut-off and lifting control means (33',34) must be connected correctly for lifting the brakes. The control means (33,33a,34) are provided with positioning means (41) which can be actuated via two control lines (42a, 43a) each and a switch (48) which can be switched between an 'on' position lifting the brake and an 'off' position which causes the brake to be set and in which at the same time a short-circuit-like connection between the two control lines (42a, 43a) is established in order to prevent any energy supply to the positioning means (41) and, thereby, unintended lifting of the set brakes.
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