Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Closers – Spring and gear
Reexamination Certificate
2006-03-07
2006-03-07
Mah, Chuck Y. (Department: 3677)
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Closers
Spring and gear
C016S052000, C016S062000, C016S064000
Reexamination Certificate
active
07007342
ABSTRACT:
The present invention relates to a door closer, in a housing of which is received a sliding cylinder, the sliding cylinder is provided with teeth on an outer periphery thereof for meshing with a gear wheel of a door shaft, a sliding cylinder interiorly formed with inner wall serves to move relative to a piston of a piston shaft. At an end of the piston shaft is provided with an oil-replenishing cylinder that serves to replenish hydraulic oil to the sliding cylinder via a one-way valve.
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Baxley Charles E.
Mah Chuck Y.
Vogelbacker Mark T.
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