E - Fixed Constructions – 05 – F
Patent
E - Fixed Constructions
05
F
268/24, 138/85
E05F 15/04 (2006.01)
Patent
CA 1190253
ABSTRACT A door closer for regulating the movement of a door panel with respect to its frame has a body enclosing a chamber and an adjacent cylinder having a head. A piston is reciprocable in the cylinder toward and away from the head and in accordance with the door panel motion. A spring in the chamber urges the piston toward the head. A duct through the piston controlled by a check valve permits liquid flow from the chamber to the cylinder, but not vice versa. A passage in the body extends between the cylinder, near the head, and the chamber. In that passage near the head is a throttle valve for restricting liquid flow, and in the passage near the chamber is a by- pass valve for restricting liquid flow and for permitting increased flow under increased liquid pressure. There is also a bore in the body extending between the passage intermediate the throttle valve and the bypass valve and an adjacent part of the cylinder traversed by the piston.
426154
Nimee George S.
Zunkel Richard L.
Schlage Lock Company
Smart & Biggar
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