Material or article handling – Self-loading or unloading vehicles – Loading or unloading by other carrier or mover means – and...
Patent
1983-03-28
1985-09-10
Spar, Robert J.
Material or article handling
Self-loading or unloading vehicles
Loading or unloading by other carrier or mover means, and...
414540, 414674, 254 89H, 187 80, B60P 146
Patent
active
045403295
ABSTRACT:
A safety locking mechanism for locking a hoist, such as a power operated tailgate, with repect to its supporting structure comprises: a pair of latch arms which are connected to one another by a flexible cable. A pair of power transmission chains connect the hoist to a power source. A pair of tension sensing lever arms are pivotally mounted and arranged to detect the presence or absence of a normal loading tension in the power transmission chains. The flexible cable also engages each of the tension sensing levers and is held by them in a position in which it retains the latch arms in a released position when a normal loading tension is detected in the power transmission chains. The latch arms will both move to a latching position locking the hoist when the absence of a normal loading tension is detected in the power transmission chains. The latch arms are made of a material which has a greater hardness than that of the slide members which support the platform so as to become embedded in the slide member when in the latching position.
REFERENCES:
patent: 276784 (1883-05-01), Daso
patent: 2635771 (1953-04-01), Black
patent: 2788864 (1957-04-01), Sanders et al.
patent: 3275170 (1966-09-01), MacRae et al.
patent: 3282449 (1966-11-01), Buford
Diesel Equipment Limited
Muncy Ken
Spar Robert J.
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