AUTOMATIC DOOR CLOSER STRUCTURE
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United States of America Patent
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-
N/A
Issued Date -
Aug 18, 2011
app pub date -
Feb 12, 2010
filing date -
Feb 12, 2010
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An automatic door closer structure comprises a casing, at least one piston, at least one limiting member, at least one driving member connected with the piston and a shaft. The casing has an outside wall, a chamber, an inside wall and at least one first limiting portion. The piston slidably disposed within the chamber of the casing has an outer wall and a second limiting portion formed on the outer wall. The limiting member has a first end portion and a second end portion both are connected with the first limiting portion of the casing and the second limiting portion of the piston respectively to limit rotation of the piston. The shaft comprises a shaft body pivotally disposed in the casing and an eccentric cam contacts against the driving member.
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