Auto-closing device for a sliding door
AssigneeDoor & Window Hardware Co.
InventorsWei-Hung CHANG, Sung-Hui LIN
Life of this patent
Estimating the term…
Abstract
An auto-closing device has a base, a cylinder, a slider, a spring and an adjusting device. The adjusting device is connected to an end of the spring opposite to the slider and has an adjusting frame and an adjusting bolt. The adjusting frame has a first end connected securely to the spring and a second end provided with a threaded hole. The adjusting bolt is mounted rotatably on the base and is screwed into the threaded hole in the adjusting frame. Accordingly, when the adjusting bolt is rotated, the adjusting frame is moved relative to the body so that the pulling force provided by the spring is adjusted to fit with different door panels with different weights.
Claims19
An auto-closing device for a sliding door comprising:
- a base having
- a chamber defined in the base;
- a track channel defined in an outer surface of the base and communicating with the chamber;
- and
- at least one guiding channel defined in the base and communicating with the chamber, and each one of the at least one guiding channel having an end provided with a positioning recess;
- a cylinder mounted in the chamber of the base and comprising
- a housing;
- and
- an expansion rod retractably mounted on the housing;
- a slider mounted slidably in the chamber along the track channel, extending out from the base via the track channel, connected to the expansion rod of the cylinder and comprising
- a positioning pin mounted on the slider, mounted slidably in the at least one guiding channel in the base and selectively engaging the positioning recess of the at least one guiding channel;
- a spring having an end connected with the slider;
- and
- an adjusting device connected to an end of the spring opposite to the slider and having
- an adjusting frame having a first end connected securely to the spring and a second end provided with a threaded hole;
- and
- an adjusting bolt mounted rotatably on the base and screwed into the threaded hole in the adjusting frame.
Dependencies are inferred from the claim text.