Kabushiki Kaisha Komatsu Seisakusho

Kazumori Nishida

Toshinori Kawahashi

Kazuo Matsuda

Masami Hashimoto

Akihiro Toyomura

Mitsuyoshi Wada

An operating device for winch control valves, featuring that, in a construction wherein a valve of a clutch for winding up a winch, a valve of a clutch for winding down the winch, and a valve of a brake can be operated by a single control lever to thus simplify the operation of the winch, the boss section of the primary lever linked with a spool of the valve for winding up the winch and the boss section of the secondary lever linked with a spool of the valve of the brake are put to interlocking rotation only at the time of rotation in the unitary direction, the boss section of the said secondary lever and the boss section of the tertiary lever linked with a spool of the valve for winding down the clutch are properly interlocked with each other only at the time of rotation in the unitary direction, a couple of positions as are confronted with each other on the both sides of the center of rotation of a rotator to be put to rotation either forward or backward by the operating lever are properly linked with the said primary lever and the said tertiary lever, respectively, through a loose mechanism.

Operating device for winch control valves

A control valve is provided which is designed to be set in place on a hydraulic circuit of a two-drum type hydraulic-actuated winch for controlling the actuation of the hook and the boom of a crane, and to be employed for actuating a hoisting-up clutch, a hoisting-down clutch, and a brake. A control valve is designed with a spool and a sliding lever arranged in place in the main body of the valve in such a manner as to be free to slide therein, with the said sliding lever connected with a control lever for the hook and the boom, wherein the operating capability of the said control lever is so set in place as to be on a higher level than the hydraulic operating capability to be fed to hydraulic equipment.

Control valve

A device for elevating the boom of a side crane has a double acting valve provided in a hydraulic circuit so as to permit natural lowering of the boom of the side crane under its own weight as well as forcible raising and lowering hydraulically, and also so as to maintain the boom without need of further fluid supply from a pump in its forcibly lowered or lifted state for a long period of time through the trapping of hydraulic fluid within the boom cylinders on both the lifting and lowering sides thereof.

Device for controlling the boom elevation of a side crane

An operating device for a double drum winch that has a hydraulically operated clutch, a brake and a hydraulic pressure variable control valve, and a single control lever connected to the hydraulic pressure variable control vavle to enable the operation of a hook and boom by one control lever so as to simplify the function and uses of the winch.

Growing community of inventors

Hirakata, Japan

Kazumori Nishida