Title:
STRAP ADJUSTMENT SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/137053
Kind Code:
A1
Abstract:
A strap adjustment system has a base body having a bottom wall, two side walls and a strap retaining bar extending between the two side walls, the bottom wall having an aperture therethrough with screw threads extending around an inside surface, and a screw disc having a central protrusion and screw threads extending around the central protrusion. The central protrusion fits through the aperture in the base body by rotating the screw disc so that the threads in the screw disc mate with the threads in the aperture, such that a height of the protrusion above the bottom wall of the base body is adjustable by turning the screw disc. In situations where a high degree of friction is required, the protrusion can be positioned at a maximum height through the aperture, and in situations where a low degree of friction is desired, the protrusion can be positioned lower.
Inventors:
WONG YING KWAN (CN)
CHAN YICK FAI (CN)
CHAN YICK FAI (CN)
Application Number:
PCT/CN2018/110401
Publication Date:
July 18, 2019
Filing Date:
October 16, 2018
Export Citation:
Assignee:
DURAFLEX HONG KONG LTD (CN)
International Classes:
A44B11/06
Domestic Patent References:
| WO2014038068A1 | 2014-03-13 |
Foreign References:
| US9155359B1 | 2015-10-13 | |||
| CN204070955U | 2015-01-07 | |||
| CN203828198U | 2014-09-17 | |||
| JPH10117813A | 1998-05-12 | |||
| US20060032028A1 | 2006-02-16 | |||
| CN1444885A | 2003-10-01 |
Other References:
See also references of EP 3737255A4
Attorney, Agent or Firm:
LIU, SHEN & ASSOCIATES (CN)
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