24/06/2005 - Controller General of Patents, Designs, and Trade Marks

(12) PATENT APPLICATION PUBLICATION
(19) INDIA (21)
(22) Date of filing of Application: 04/06/2003 (43)
Application No: 575/MUMNP/2003 A
Publication Date: 24/06/2005
(54) Title of the invention: DEVICE FOR WELDING NUT OR THE LIKE
(51) International Classification : B 23 K 11/14, 11/31 (71)
(31) Priority Document No. : 2000-378620
(32) Priority Date : 13/12/2000
(33) Name of priority country : JAPAN
(86) International Application
No.
: PCT/JP01/10790
Filing Date : 10/12/2001
(87) International Publication
No.
: WO 02/47862 A1 (72)
(61) Patent of addition to
Application No.
: NIL
Filed on : N.A.
(62) Divisional to Application
No.
: NIL
Filed on : N.A.
(57) Abstract:
The invention relates to a nut-positioning pin provided to a lower electrode for
projection welding of a nut. A welding device comprises an electrode holder
(2) of double-tube structure having a cooling water passage, a guide ring (13)
for guiding vertical movement of a coupling rod (7), an air circulation means
(m) for preventing sputter entrance, a coupling block (28) made of a magnetic
material for preventing the influence of an external magnetism on a
magnetism sensor part, and a magnetic shield. The electrode holder can be
adequately cooled, the coupling rod can be accurately guided, and entrance of
sputter can be prevented. The adverse influence of an external magnetism on
the sensor part can be prevented, thereby improving the sensing accuracy.
(FIG.: 1)
Total Pages: 44.
Name of the Applicant:
KABUSHIKI KAISHA SMK
Address of the Applicant:
830-5, OOI TSUKUI-MACHI,
TSUKUI-GUN,
KANAGAWA 220-0202 JAPAN.
Name of the Inventors:
1. MASATO HIDAKA
Filed U/S 5(2) before the
Patents (Amendment)
Ordinance, 2004: NO
The Patent Office Journal 24.06.2005 17781