Importance

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Abstract

An air pressure regulator and an adjusting mechanism for a regulating device such as an air pressure regulator having a value body having a valve element and a diaphragm therein and a spring bonnet. The spring bonnet has a peripheral recess or circumferential groove and a external male thread. The adjusting mechanism has an outer sleeve knob removably mounted on the spring bonnet for rotating a threaded pressure-adjusting spindle or adjustment screw internally of the spring bonnet. The knob has axial internal elastic claws. Each claw has a projection elastically received in the groove of the spring bonnet when mounted in assembly therewith. The claws elastically bias the corresponding projections into the groove and hold the tubular know in axial assembly with the regulator. Rotation of the knob rotates the adjustment screw for adjusting spring pressure of a spring acting on the diaphragm for regulating air pressure to maintain it constant. An internally threaded outer sleeve is screwed on to the external male thread on the spring bonnet before the knob is mounted in assembly with the spring bonnet. To remove the knob the outer sleeve is unscrewed and a surface thereon bears on a surface of the knob and urges it axially so that the elastic claws elastically uncouple their projections from the spring bonnet.

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First Claim