Two stage compressive spring operated door check hinge
OwnerWen-Yi Hunginventor
Life of this patent
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Abstract
Disclosed herein is a two stage compressive spring operated door check hinge. It has two springs of different length equipped along an outer tube to serve two stage restoring force. A unique design of collaborated function of the set billets and the corresponding containment holes enable the door to pause at a desired position. An adjustable nut is provided to adjust the elastic force of two springs such that the operation of the door can be carried out smoothly and silently without installing an awkward articulated door check arm.
Claims7
A two stage compressive spring operated door heck hinge comprising a base tube having a stationary wing plate at its side thereof for securing to the door body, a pad block of smaller diameter being formed at the upper end of said tube thereof, a center pin of even smaller diameter being extended upwardly form the center of said pad lock, a pair of symmetrically disposed guide tracks being formed at both sides of the lower end of said center pin;
- an outer tube having a butterfly wing formed ay one side thereof for securing to a door frame, said outer tube having a diameter able to let it sleeve and enclose said base tube up to the upper end of said base tube, a pair of symmetrical spiral grooves being formed in its inner tube cavity;
- a cylindrical slide block having several through holes formed at its center portion thereof being inserted into said center pin and said guide tracks of said base tube, a pair of symmetrical spiral rails being formed on its outer wall surface such that it being able to relatively slide with said outer tube by mating said spiral rails with said spiral grooves after it being conjunction to said outer tube;
- an upper spacer block and a lower spacer block being provided on the top end of said cylindrical slide block, the inner parts of said spacer blocks being for equipping an inner spring, while the outer parts thereof being for equipping an outer spring;
- and
- a fixing nut and an adjustable nut being screw engaged with said center pin by screw thread provided on said center pin;
- with this structure, said outer tube is displaced stably following the door movement, the door can be opened easily and closed rapidly without any noise by means of said two springs' two stage restoring force.
Dependencies are inferred from the claim text.