Safety device for a lifting apparatus

Details Safety device for a lifting apparatus Safety device for a lifting apparatus

1990-11-06

1993-06-22

Matecki, Katherine

Implements or apparatus for applying pushing or pulling force

Load engaging member and power transmitting cable for...

187 85, B66B 512, B66B 534

Patent

active

052210758

ABSTRACT:
A safety device for a lifting apparatus, said lifting device having a carriage member (12) guided in a column (14) said carriage member (12) selectively positioned with respect to said column member (14) by a flexible tension member (20) connected to a drive means (22); a pawl member (34) is disengaged from an elongated rack (62) by a predetermined tension in the tension member (20); A reduction in the predetermined tension in the flexible tension member (20) will automatically engage the pawl member (34) into the rack member (62) by the urging of a biasing member (56) preventing any uncontrolled movement of the carriage relative to the column.

REFERENCES:
patent: 338253 (1886-03-01), Deck
patent: 2564267 (1951-08-01), Manke
patent: 4102435 (1978-07-01), Hofmann
patent: 4328951 (1982-05-01), Laupper
patent: 4531614 (1985-07-01), Naegeli
patent: 4598506 (1986-07-01), Nohl et al.
patent: 4674938 (1987-06-01), Van Stokes
patent: 4797050 (1989-01-01), Habicht
patent: 4856618 (1989-08-01), Isogai
patent: 4954037 (1990-09-01), Habicht

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