Door closer
AssigneeFu Luong Hi-Tech Co., Ltd.
InventorYu-Jen Wang
Life of this patent
Estimating the term…
Abstract
A door closer includes a closer casing, a pivot unit, and a length-variable damping cylinder. The pivot unit includes a pivot axle, a cam member, and a cam follower member. The pivot axle has a drive end portion that extends into and that is retained rotatably in the closer casing, and a coupling end portion that extends out of the closer casing. The cam member is mounted co-rotatably on the drive end portion of the pivot axle. The cam follower member is disposed in the closer casing, and is acted upon by the cam member. The damping cylinder is disposed in the closer casing, and has one end coupled to the cam follower member and an opposite end anchored to the closer casing.
Claims12
A door closer comprising:
- a closer casing having first and second end portions opposite to each other in a longitudinal direction;
- a pivot unit including
- a pivot axle having a drive end portion that extends into and that is retained rotatably in said first end portion of said closer casing, and a coupling end portion that extends out of said closer casing,
- a cam member mounted co-rotatably on said drive end portion of said pivot axle, and
- a cam follower member disposed in said closer casing and acted upon by said cam member for moving along the longitudinal direction between open and closing positions upon rotation of said pivot axle;
- and
- a length-variable damping cylinder disposed in said closer casing and having one end coupled to said cam follower member and an opposite end anchored to said second end portion of said closer casing, said damping cylinder accumulating a restoring force upon movement of said cam follower member from the closing position to the open position, and releasing the restoring force to assist movement of said cam follower member from the open position back to the closing position.
Dependencies are inferred from the claim text.