| 摘要 |
A machine for leveling a ladder on a uneven surface, with a support housing attached to one or both ladder legs, having an interior cavity for a telescoping leg, two inner drilled lugs that support a release and lock lever, two outer drilled lugs that overlap the ladder legs for more secure mounting, both support housings mount to each ladder leg in such a way that the load sits directly over the machine with out increasing the width of the ladder. A release and lock lever attached to the support housing, that automatically locks into a telescoping leg by spring action when released making it unnecessary for locking pins or bolts, a release and lock lever, rotating on a rotation shaft, with a positive gear tooth lock that engage into the telescoping leg, a telescoping leg with a large number of machined or molded gear teeth that telescopes out of the interior cavity of the support housing, a release and lock lever that rotates on a shaft and wedges into the telescoping leg according to the weight applied to the ladder, a spring fixed between release and lock lever and support housing to hold the mechanism in the lock position until actuated, a rotation shaft fix between two support housing lugs held in place by lock rings. This machine has a fine gear tooth pattern allowing for a large number of increments of adjustments.
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