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Title:
A LEAD-IN TYPE INTERFERENCE FIT PIPELINE EXTERNAL THREAD
Document Type and Number:
WIPO Patent Application WO/2009/155884
Kind Code:
A1
Abstract:
A lead-in type interference fit pipeline external thread (10), it is able to achieve its seal while non-use of packing, in which the effective thread is a cone-shape pipe thread, at least two complete variation convex thread (11) is in full-length of said effective thread, the middle diameter of said variation convex thread (11) is amount of pre-interference fit more than that of its corresponding rules thread (12), the tooth side (100) of said variation convex thread (11) is a convex arc. The invention also involves the manufacturing method and manufacturing device of a lead-in type interference fit pipeline external thread (10),and a lead-in type interference fit pipe thread pair pipe fitting.

Inventors:
XIAO, Jinan (Rm 502, Fangzheng Building No. 1122, XinJinQiao Rd, Pudong Shanghai 6, 201206, CN)
肖金安 (中国上海市浦东新区新金桥路1122号方正大厦502室, Shanghai 6, 201206, CN)
Application Number:
CN2009/072498
Publication Date:
December 30, 2009
Filing Date:
June 29, 2009
Export Citation:
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Assignee:
SHANGHAI PAN-CHINA FASTENING SYSTEM CO., LTD. (Rm 502, Fangzheng BuildingNo. 1122, XinJinQiao R, Pudong Shanghai 6, 201206, CN)
上海泛华紧固系统有限公司 (中国上海市浦东新区新金桥路1122号方正大厦502室, Shanghai 6, 201206, CN)
XIAO, Jinan (Rm 502, Fangzheng Building No. 1122, XinJinQiao Rd, Pudong Shanghai 6, 201206, CN)
International Classes:
F16L15/06; B21H3/02; B23G1/22; B23G7/00
Foreign References:
CN1489680A
GB2074685A
CN1555938A
Other References:
None
Attorney, Agent or Firm:
SHANGHAI PATENT & TRADEMARK LAW OFFICE, LLC (435 Guiping Road, Xuhui, Shanghai 3, 200233, CN)
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