Title:
DART HAVING RETRACTABLE FLIGHT
Document Type and Number:
WIPO Patent Application WO/2019/233243
Kind Code:
A1
Abstract:
A dart having a retractable flight comprises a shaft, a tip (3) provided at a front end of the shaft, and a flight provided at a rear end of the shaft. The flight is movably provided at the shaft. The rear end of the shaft is provided with a flight connection portion (4). The flight comprises a sleeve (5) and multiple vanes (6) provided at the sleeve (5). The flight connection portion (4) is provided with an engagement portion. A position-limiting portion (51) is provided inside the sleeve (5). The flight connection portion (4) is inserted into the sleeve (5). An elastic member (7) is sleeved onto the flight connection portion (4). The elastic member (7) is positioned between the position-limiting portion (51) and the shaft. The flight of the dart is rotatable at the flight connection portion (4), and is retractable. The flight has high impact resistance and long service life.
Inventors:
CHEN DANGCAI (CN)
Application Number:
PCT/CN2019/086315
Publication Date:
December 12, 2019
Filing Date:
May 10, 2019
Export Citation:
Assignee:
CHEN DANGCAI (CN)
International Classes:
A63F9/02; A63B65/00; A63H33/18; F42B6/00; F42B10/12
Foreign References:
CN108514737A | 2018-09-11 | |||
CN208356086U | 2019-01-11 | |||
CN108905187A | 2018-11-30 | |||
CN208799752U | 2019-04-30 | |||
CN2396861Y | 2000-09-20 | |||
CN2536273Y | 2003-02-19 | |||
US5118117A | 1992-06-02 | |||
CN2607172Y | 2004-03-24 | |||
US3995861A | 1976-12-07 | |||
US5058900A | 1991-10-22 | |||
US4842285A | 1989-06-27 |
Attorney, Agent or Firm:
BEIJING CHONGZHI PATENT OFFICE (GENERAL PARTNERSHIP) (CN)
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