Locking Mechanism

摘要

A locking mechanism for use in a quick hitch coupling device for coupling an attachment to a mechanical arm of, for example, an excavator. The invention is particularly but not exclusively concerned with a locking mechanism for a quick hitch coupling device comprising a safety system for automatically retaining the coupler in a locked arrangement.

主权项

1. An extendable mechanism, moveable through a plurality of states, wherein the plurality of states comprises at least a first state and a second state, the mechanism comprising:
a force receiving member wherein application of a force of a first type to the force receiving member results in the extendable mechanism moving toward the first state, and wherein application of a force of a second type to the force receiving member results in the mechanism moving toward the second state, and a locking member in communication with the force receiving member, the locking member moveable between a locked configuration and an unlocked configuration; wherein when in the locked configuration, the locking member restricts movement of the extendable mechanism toward the first state; and wherein: application of the first type of force to the force receiving member results in the locking member moving to the unlocked configuration; and application of the second type of force to the force receiving member results in the locking member moving to the locked configuration.