Title:
VARIABLE BOX SPANNER CAPABLE OF FASTENING AND DISSEMBLING BOLTS OF VARIOUS SIZES BY USING MOVABLE BOLT HEAD PROTRUSION LATCH AND ADJUSTMENT SCREW
Document Type and Number:
WIPO Patent Application WO/2020/130707
Kind Code:
A1
Abstract:
The present invention provides a box spanner comprising: a cylindrical main shaft (3) having, on one cross-section thereof, a ratchet rectangular groove (3-1) to which a ratchet is coupled, a screw thread (3-2) formed on a center area of the outer side surface of the main shaft, a 凸-shaped guide groove (3-4) formed by cutting the side surface of the main shaft in the circumferential direction from a center area, a second spring groove (3-3) formed on the shaft-side bottom surface of the guide groove (3-4), and one end of an elastic body (4) disposed in the second spring groove (3-3); a first bolt head protrusion latch (1) which is formed in the shape of a rod having a corresponding thickness so as to be insertable to a first guide sleeve (3-5), has one side cross-section of the upper surface of the latch formed to be slanted, has a bump (2-1) formed in the lengthwise direction on the lower surface of the lower part of the latch, has a spring groove (1-1) formed on one side of the lower surface of the upper part of the latch so that the other end of the elastic body can be inserted to the spring groove, and has, at the center of a side surface, a move groove (1-2) having a size corresponding to the thickness of a sleeve part of the main shaft (3) so as to be caught when inserted to the guide sleeve (3-5); an adjustment screw (2); and a reverse-rotation prevention nut (5).
Inventors:
CHOI CHOONG HYUN (KR)
Application Number:
PCT/KR2019/018181
Publication Date:
June 25, 2020
Filing Date:
December 20, 2019
Export Citation:
Assignee:
ROPEN CO LTD (KR)
International Classes:
B25B13/12; B25B13/06; B25B23/00; B25B23/08
Foreign References:
| US2582444A | 1952-01-15 | |||
| KR20050031264A | 2005-04-06 | |||
| US5819607A | 1998-10-13 | |||
| JPH11173456A | 1999-06-29 | |||
| US20090272237A1 | 2009-11-05 | |||
| KR101973178B1 | 2019-08-26 |
Attorney, Agent or Firm:
PARK, Hye Sung (KR)
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