Machine element or mechanism – Gearing – Directly cooperating gears
Patent
1997-04-03
1998-11-10
Marmor, Charles A.
Machine element or mechanism
Gearing
Directly cooperating gears
137 72, 74 2, F16H 118, F16H 1714
Patent
active
058327797
ABSTRACT:
An actuator assembly for moving a member, such as a gate valve, or the like, between a retracted and extended position, and a locking device for locking the member in its extended position. A ball screw is connected to the member to be moved and is in threaded engagement with a ball nut so that, upon rotation of the ball nut, the ball screw, and therefore the member, moves between a retracted and an extended position. A gear train is connect able between a power source and the ball nut for transferring torque therebetween to rotate the nut member. The locking device cooperates with the actuator for quickly and easily locking the ball screw in an extended position at any time without requiring it to be retracted and then extended, and includes a plunger that moves axially in a housing in response to movement of the ball screw. The plunger has a reduced dimension portion, and a stem is provided that has a reduced dimension portion and a regular dimension portion. The stem is movable in the housing to a first position in which its reduced dimension portion aligns with the reduced dimension portion of the plunger to permit movement of the plunger, and therefore the member, from the predetermined position. The stem is also movable to a second position in which its regular dimension portion aligns with the necked-down portion of the plunger so that the regular dimension portion of the plunger overlaps, and is blocked by, the corresponding regular-dimension of the stem to lock the plunger, and therefore the member, in the predetermined position.
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Hiller Don
Madrid Ronn G.
Charles Marcus
Dresser Industries Inc.
Marmor Charles A.
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