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US 5,269,043 AGranted
Pneumatic hinge
OwnerMing-Hua Yanginventor
Life of this patent
Estimating the term…
Abstract
The invention is a pneumatic hinge which makes use of the air pressure action and counter balance to produce a spring-free hinge structuring to improve the ability to interrupt an opening or closing door at one's disposal of the traditional spring hinge, to eliminate its disadvantage as well as to produce more practical value.
Claims5
A pneumatic hinge structure for pivotally supporting a movable element on a fixed element, comprising:
- a) a first base portion fixedly attached to one of the movable and fixed elements;
- b) a second base portion fixedly attached to the other of the movable and fixed elements;
- c) a link member attached to the second base portion;
- d) pivot attachment means pivotally connecting the first base portion to the link member;
- e) an action plate operatively associated with the pivot attachment means such that pivoting motion of the movable element relative to the link member causes movement of the action plate relative to the first base portion;
- f) a first pneumatic capsule operatively associated with the action plate and the first base portion so as to exert a force on the action plate urging the movable element toward a predetermined position;
- and,
- g) counter-balancing pneumatic capsule means operatively associated with the action plate and the first base portion so as to counter balance the force exerted on the action plate by the first pneumatic capsule in the absence of external forces applied to the movable element such that the movable element will remain in any position until an external force is applied thereto.
5 more elements
Dependencies are inferred from the claim text.