Valve operator de-clutch mechanism

Details Valve operator de-clutch mechanism Valve operator de-clutch mechanism

1982-06-21

1984-10-02

Braun, Leslie A.

Machine element or mechanism

Alternate manual or power operators

192 35, 192 481, 192 67R, F16H 3500

Patent

active

044740786

ABSTRACT:
A valve operator has a de-clutch mechanism for automatically shifting the clutch out of handwheel drive and into electric motor drive upon actuation of the electric motor. The motor drive sleeve 23 has an annular step 25 which has a flat 26. The clutch 50 is biased by spring 55 toward the motor drive sleeve 23 but is prevented from moving in the direction of the motor drive sleeve by the clutch fork 40 which has extending therefrom two latch arms 71,72 one of which 71 is longer than the other 72. The longer latch arm 71 abuts against the step 25 on the motor drive sleeve. When the electric motor M is energized, the motor drive sleeve rotates and the flat 26 comes into alignment first with the longer latch arm 71 and later with the shorter latch arm 72, thereby releasing in two steps the clutch fork 40 and allowing the clutch 50 to shift out of handwheel drive and into electric motor drive.

REFERENCES:
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patent: 4393965 (1983-07-01), Zouzoulas
patent: 4429591 (1984-02-01), Zuch et al.

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