A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The present invention proposes a cam-type oil-free automatic door closer, installed between a fixed object and door, comprising a first device and second device, wherein the first device comprises a propping rod and the second device is configured with a cam, the propping rod is subjected to an acting force of an elastic element ordinarily to pressed against a working curve of the cam elastically, allowing said propping rod of the first device to be slid along the working curve of the cam relatively to compress the elastic element upon a door opening operation, and the propping rod and the cam to be returned back to original positions thereof to complete a door closing operation when a user releases the door.
The present invention proposes a cam-type oil-free automatic door closer, installed between a fixed object and door, comprising a first device and second device, wherein the first device comprises a propping rod and the second device is configured with a cam, the propping rod is subjected to an acting force of an elastic element ordinarily to pressed against a working curve of the cam elastically, allowing said propping rod of the first device to be slid along the working curve of the cam relatively to compress the elastic element upon a door opening operation, and the propping rod and the cam to be returned back to original positions thereof to complete a door closing operation when a user releases the door.
CAM-TYPE OIL-FREE AUTOMATIC DOOR CLOSER
HUANG SHEN-FU (author)
2015-06-25
Patent
Electronic Resource
English
IPC:
E05F
DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION
,
Vorrichtungen zum Bewegen der Flügel in die Offen- oder Schließstellung