COUNTING REGISTER FOR HYDRAULIC TOOL

Japanese Patent JP3300911

B2

PURPOSE: To precisely grasp the number of times of use of a hydraulic tool by installing a counting value display means which receives the detection signal of a pressure detecting mechanism and counts and displays the number of times where the pressure in an oil passage for detecting the pressure reaches over a prescribed pressure.
CONSTITUTION: Simultaneously with the press attaching work for a hydraulic tool, a portion of the pressurized oil which flows into the driving oil passage 35 of a counting register 31 for the hydraulic tool flows in the direction of arrow D into the shaft insertion hole 49c of a plug 49 through an oil passage 39 for detecting the pressure which is branched from an oil passage 35 for drive, peripheral groove 49b of the plug 49, and the communication hole 49d of the plug 49. When the pressure in the shaft insertion hole 49c becomes over a prescribed pressure, a plunger 51 retreats against the elastic urging force of a coil spring 59, and a switch 55 is pressed, and turned ON. Through this turning-ON operation of the switch 55, the signal is transmitted to a counting value display means 61 through an electric power source 63, and the counting value display means 61 which receives the signal counts the number of times of use of the hydraulic tool and displays the value.

Yoshiyoshi Maruyama
Masamichi Osaka

JP10657794A

July 08, 2002

May 20, 1994

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Izumi Seiki Co., Ltd.

B23Q17/00; B21F15/00; B23Q17/09; B25F5/00; G06M1/12; G06M1/276; H01R43/042; (IPC1-7): B25F5/00

JP2198772A
JP62163833U
JP3109774U
JP365679U

Michizo Isono

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