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US 2012/0071083 A1Published application
Locking damper positioner
AssigneeNorthWest Engineering Service, Inc.
InventorMark Andrew Gribble
Life of this patent
Estimating the term…
Abstract
A damper positioner includes a lead screw to move the damper blade and a screw lock selectively engageable with the screw to permit rotation of the screw but prevent unintended rotation.
Claims14
An apparatus for adjusting a blade of a damper, said blade affixed to an axle rotatably mounted in a frame of said damper, said apparatus comprising:
- (a) a lever affixed to said axle proximate a first end of said lever;
- (b) an elongate screw comprising a head portion, said screw in threaded engagement with a first anchor affixed to said lever remote from said first end, said screw rotatable but axially restrained in a second anchor affixed to said frame, rotation of said screw rotating said axle;
- and
- (c) a screw lock selectively engageable with said screw to selectively restrain rotation of said screw.
1 more element
An apparatus for selectively constraining rotation of a screw in an anchor, said screw including a head, said apparatus comprising:
- (a) a body defining a socket having a shape complementary to a portion of said head of said screw, said body axially slidable on said screw but rotationally restrained by said anchor;
- and
- (b) a resilient member urging said body toward said head to engage said head in said socket, engagement of said head and said socket restraining rotation of said screw relative to said body.
Dependencies are inferred from the claim text.