Implements or apparatus for applying pushing or pulling force – Step-by-step traveling bar – Pawl actuated
Patent
1976-04-14
1978-05-02
Blix, Trygve M.
Implements or apparatus for applying pushing or pulling force
Step-by-step traveling bar
Pawl actuated
318374, B66D 148
Patent
active
040870782
ABSTRACT:
A moving apparatus for a load lifts the load by the torque of a motor, and balances and holds the same with the aid of a mechanical brake when the apparatus stops. A timing device is incorporated in brake control so that when the apparatus stops in response to a signal indicating that a zero speed is designated, the mechanical brake is operated with a time lag after the receipt of the signal and, as soon as the brake is applied, the power supply to the motor is cut off. This arrangement remarkably reduces the impact of stopping upon the mechanical brake and drive, lessens the wear of the brake, permits reduction in size of the components and extends the service life of the components, thus providing an apparatus which saves power in comparison with conventional equipment.
REFERENCES:
patent: 2426029 (1947-08-01), Kuhn
patent: 2503438 (1950-04-01), Gruner
patent: 2514896 (1950-07-01), Noodleman
patent: 2625672 (1953-01-01), Calvert
patent: 3365614 (1968-01-01), Luongo et al.
patent: 3417289 (1968-12-01), Jensen
patent: 3516526 (1970-06-01), Seesselberg
patent: 3735224 (1973-05-01), Bachofer et al.
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patent: 3852616 (1974-12-01), Carp et al.
Joraku Masami
Kawano Shigeyoshi
Ueno Masahiro
Yamauchi Koji
Blix Trygve M.
Hitachi , Ltd.
Noland Kenneth
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