Valve operator

Details Valve operator Valve operator

1981-06-05

1984-02-07

Purser, Ernest R.

Machine element or mechanism

Alternate manual or power operators

251 14, 744248VA, F16K 3114

Patent

active

044295928

ABSTRACT:
A valve operator (10) which includes a ball screw (28) in constant engagement with the output shaft (24) of an air cylinder for automatic operation of the valve, and which includes a manual drive means (20) engageable with the ball screw (28) in any position thereof. The manual drive means (20) includes a ball nut (30) engaged with the ball screw (28), a clutch output member (34) attached to the ball nut (30), a clutch input member (38) which is rotatable by a handwheel (56) through a worm gear train (49, 52), and a manually actuatable clutch actuating assembly (42) which is operable to engage the clutch input member (38) with the clutch output member (34).

REFERENCES:
patent: 2698157 (1954-12-01), Ludeman
patent: 2850364 (1958-09-01), Dowling
patent: 3198033 (1965-08-01), Fry
patent: 3842854 (1974-10-01), Wicke

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