Pintle with adjustable spring tension motor
AssigneeHenry Soss and Company
InventorsEdward G. Curry, Vernard W. Sanders
Life of this patent
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Abstract
A tension spring motor for use in a pintle or cartridge like container is employed to return hinged parts to an initial position after having been rotated to a second position. Door hinges are a typical example where a spring automatically returns the door to closed position after it has been opened. To vary the tension in the spring use is made of a pair of notched members housed within the pintle, one being a fixed member and the other being a movable member attached to the spring and rotatable to different positions of adjustment. A wrench hold in the movable member is accessible from the outside through a hole in the fixed member.
Claims11
A separate torsion spring motor unit, for action between pivotally mounted elements, comprising a cylindrical housing having an elongated chamber therein,
- a coiled torsion spring in said chamber, a first spring keeper having an attachment to one end of the spring at an adjacent end of the chamber and having a rotatable mounting relative to said housing,
- a spring tension subassembly comprising a second spring keeper having an attachment to the other end of the spring and rotatable relative to said housing,
- a plug fixed to the end of the housing adjacent said second spring keeper, detent means comprising elements respectively on said plug and said second spring keeper,
- means on said second spring keeper enabling rotation of said second spring keeper to vary tension in said spring, and access means past said plug to said means on said second spring keeper,
- said detent means having a blocking engagement in one rotational direction whereby to maintain spring tension and being yieldable in the opposite rotational direction whereby to enable rotation to increase spring tension, said detent means being yieldable in an axial direction whereby to enable a release of detent action and effect a variable decrease in spring tension.
Dependencies are inferred from the claim text.