Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Checks and closers
Patent
1996-03-11
1998-03-17
Clark, Jeanne M.
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Checks and closers
16 82, 16 85, E05F 300
Patent
active
057272867
ABSTRACT:
A structure of a rehabilitating device for automatically closing a movable object comprises a tubular body having a first and a second chamber therein, a cylinder member having a cock mechanism at the inward end axially disposed into the tubular body, a sleeve member incorporated with a pair of steel balls in opposite peripheries sleeved onto the cylinder member and biased at two end by a pair of recoil springs and an air valve fastened to the open end of the tubular body abutting the first chamber. When the cylinder member is extracted outward, the spring is contracted and the air pressure is induced into the first chamber for a slow rehabilitation of the cylinder member. A further extracting the cylinder member leads the sleeve member entered into the second chamber to perform a random positioning of the cylinder member therein.
REFERENCES:
patent: 484838 (1892-10-01), Wolf
patent: 1425271 (1922-08-01), Mukden
patent: 2953811 (1960-09-01), Hall
patent: 3392419 (1968-07-01), Stein et al.
patent: 3555591 (1971-01-01), Sogoian
patent: 4230309 (1980-10-01), Schnitzius
patent: 4486917 (1984-12-01), Johnston et al.
patent: 4545322 (1985-10-01), Yang
patent: 4776440 (1988-10-01), Yamada et al.
patent: 5517719 (1996-05-01), Christ
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