Title:
FAST EXPANSION SCREW
Document Type and Number:
WIPO Patent Application WO/2023/023933
Kind Code:
A1
Abstract:
A fast expansion screw, at least comprising a first body (3) and a second body (4); a first pin (32) extends toward one end on each of the two sides of the first body (3), an outer ring block (35) the outer diameter of which is greater than the first body (3) is provided at the other end, and two insertion holes (38) are provided on one side of the outer ring block (35); a second pin (42) extends toward one end on each of the two sides of the second body (4), and an inner ring block (35) is provided at the other end; the first body (3) is used to be inserted into a wall hole (51), each second pin (42) is used to be inserted into each insertion hole (38), and a screw (6) can be screwed in by means of the inner ring block (43) and penetrate through the first body (3) and the second body (4), then each of the first pins (32) and the second pins (42) expands in four different directions so as to be embedded deep into the wall hole (51), thus effectively increasing the tensile resistance of the fast expansion screw in the wall hole (51).
Inventors:
CHIANG CHUNG-HUAN (CN)
Application Number:
PCT/CN2021/114290
Publication Date:
March 02, 2023
Filing Date:
August 24, 2021
Export Citation:
Assignee:
CHIANG CHUNG HUAN (CN)
International Classes:
F16B13/06
Foreign References:
| TWM621100U | 2021-12-11 | |||
| CN101315093A | 2008-12-03 | |||
| CN1757939A | 2006-04-12 | |||
| CN210565584U | 2020-05-19 | |||
| CN108223529A | 2018-06-29 | |||
| CN108953329A | 2018-12-07 | |||
| US20190316621A1 | 2019-10-17 |
Attorney, Agent or Firm:
BEIJING HC-IP AGENCY CO., LTD. (GENERALPARTNERSHIP) (CN)
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