Importance

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Abstract

Disclosed is a safety lever apparatus and a method of using the safety lever apparatus for a heavy equipment having an operating box which is pivotally mounted to one side of an operating seat, capable of preventing an incorrect operation of the heavy equipment due to a physical contact between a working lever and an operator of the heavy equipment at the time that the operator leaves from an operating room during the operation of the heavy equipment. The safety lever apparatus comprises an operating box which is rotatably mounted to an operating seat. A complex lever of the safety lever apparatus is pivotally fixed to the operating box and is operated by an operator of the equipment in order to allow the operator for going out of an operating room. A first cam member of the safety lever apparatus blocks or transmits an operating force which is transmitted from the operating member to a working device. The first cam member rotates together with the complex lever. A spring of the safety lever apparatus rotates the operating box due to an expansion and a contraction of the spring. A second cam member of the safety lever apparatus adjusts the expansion and the contraction of the spring. The second cam member operates as a cam mechanism in relation to the movement of the first cam member.

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First Claim