Double piston spring hinge for hingeably connecting temples to a

Details Double piston spring hinge for hingeably connecting temples to a Double piston spring hinge for hingeably connecting temples to a

1996-08-22

1998-04-28

Mai, Huy

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Connectors

351113, 16228, G02C 522, G02C 516

Patent

active

057452091

ABSTRACT:
A double piston spring hinge which is used for connecting temples to an eyeglass frame. The double piston spring hinge has a front structure, a rear structure, two piston cylinders symmetrically and parallel mounted between the front and rear structures, a flap lever, and a bracket for stabilizing the front and rear structures. The two temples are hinged to opposite sides of the front of the frame by the double piston spring hinges so as to permit the two temples to fold on the frame. Each piston cylinder contains therein a spring. A piston goes in and out of the cylinder and is biased by the spring. The piston is held within the cylinder at one end and in linking members at the other end. The double piston spring hinges are a flexibility system which is a bracket that is a spring actuated piston piece which lends flexibility to the temple.

REFERENCES:
patent: 384481 (1888-06-01), Vanderwaag
patent: 633023 (1899-09-01), Miehle
patent: 2064604 (1936-12-01), Hempel
patent: 2098921 (1937-11-01), Mandaville
patent: 2374649 (1945-05-01), Calkins
patent: 2976766 (1961-03-01), Bianchi
patent: 3064530 (1962-11-01), Vigano
patent: 4377328 (1983-03-01), Ferrandi
patent: 4999008 (1991-03-01), Milone
patent: 5018242 (1991-05-01), Guy et al.
patent: 5115540 (1992-05-01), Delorme
patent: 5515575 (1996-05-01), Pinazza
patent: 5517258 (1996-05-01), Naito

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