Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Checks and closers – Liquid
Patent
1994-01-21
1995-07-18
Larson, Lowell A.
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Checks and closers
Liquid
16 61, E05F 310
Patent
active
054329779
ABSTRACT:
The door closer is of the kind which acts, for example between a door hinge stile and a hinge jamb and has a body for mounting usually in the stile, from which body a spring-biased tension member extends correspondingly for anchoring to an anchoring point (for example in the jamb), wherein a hydraulic cylinder-piston damper is interposed between the tension member and a biasing spring therefor, the damper being adapted to allow fluid in use to flow restrictedly past the piston when the tension member (12) is moved in door-closing and door-opening directions; characterized in that the cylinder of the hydraulic cylinder piston damper is formed of a plastics material, and the cylinder is resiliently expansible in response to an increase in pressure therein such that the clearance between the piston and cylinder is increased to permit increased flow of fluid around the piston.
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Cornwell Christopher M.
Kopec John
Reid Alister P.
Sumner Christopher
Gurley Donald M.
Larson Lowell A.
Reilor Limited
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