Importance

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Abstract

To provide a handle with a torque limiter capable of performing the opening/closing operation of a flow passage with a specified tightening force, less causing wear and damage to a valve element even if repeatedly used, capable of stably controlling a flow rate over a long period, capable of securely performing the opening of the flow passage, and manufacturable at low cast and a fluid controller having the handle with the torque limiter. This handle with the torque limiter comprises a handle body (62) connected to an operating mechanism (5) vertically moving the valve element by a rotating operation and a cover body (61) fitted to the handle body. The handle body comprises a ratchet wheel (7), and the cover body comprises a ratchet claw (8) rotatable about a pivot shaft (81) and a spring (9) energizing a force to rotate the ratchet claw in a direction for engaging the ratchet claw with the outer peripheral teeth for the ratchet wheel. The spring receives a pressing force from the ratchet claw in a retracting direction only when the cover is rotated in one direction to retract so as to allow the rotation of the ratchet claw to an angle at which the engagement thereof with the teeth is released when the pressing force exceeds a prescribed value.

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First Claim