Title:
AN ANTI-LOOSE AND ANTI-THEFT DEVICE FOR NUT
Document Type and Number:
WIPO Patent Application WO/2009/036707
Kind Code:
A1
Abstract:
An anti-loose and anti-theft device for nut includes a thin-wall sleeve, a round
screwed washer and a spiral wedge. A helical convolute of about a cycle is provided
in a inside hole on the bottom of the thin-wall sleeve, and a through-hole is located
in front of the helical convolute, thus, by helical convolute, the spiral wedge
is pressed on a conical surface in the hole of the round screwed washer, and a notch
in front of the helical convolute can support the large end of the spiral wedge.
Because of the inside hole of the large end of the thin-wall sleeve tightly fits
the outer circle of the round screwed washer, the spiral wedge can be joined together
with the round screwed washer by the thin-wall sleeve. They will be screwed successfully
on a bolt or on a nut as long as the initial mount position of the spiral wedge is held.
The mount is convenient and a special tool isn't needed. When said device
reverses anticlockwise, the notch of the helical convolute in the thin-wall
sleeve can depart away from the tail of the large end of the spiral wedge, at the
time, the half-baked thread crest presses tightly on the spiral wedge. When the
device is assembled on a bolt, the larger the reversal angle, the better the locking
effect, so, the object of anti-loose and anti-theft for nut can be obtained.
Inventors:
YU MIAOGEN (CN)
Application Number:
PCT/CN2008/072408
Publication Date:
March 26, 2009
Filing Date:
September 18, 2008
Export Citation:
Assignee:
NANJING YUNFAN TECHNOLOGY INDU (CN)
YU MIAOGEN (CN)
YU MIAOGEN (CN)
International Classes:
F16B39/24; F16B39/26
Foreign References:
| CN2101794U | 1992-04-15 | |||
| CN2260913Y | 1997-08-27 | |||
| CN2400624Y | 2000-10-11 | |||
| CN2438865Y | 2001-07-11 | |||
| CN2752515Y | 2006-01-18 | |||
| CN201071871Y | 2008-06-11 |
Attorney, Agent or Firm:
CN-KNOWHOW INTELLECTUAL PROPERTY AGENT LTD. (Fortune International CenterNo, 17 Daliushu Rd, Beijing 1, CN)
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