EP 1747402 A2 20070131 - SYSTEM FOR FASTENING SPARK PLUGS OF BOILERS OR THE LIKE
Title (en)
SYSTEM FOR FASTENING SPARK PLUGS OF BOILERS OR THE LIKE
Title (de)
SYSTEM ZUR BEFESTIGUNG VON ZÜNDKERZEN VON KESSELN O. Ä.
Title (fr)
SYSTEME POUR FIXER DES BOUGIES D'ALLUMAGE DE CHAUDIERES OU ANALOGUE
Publication
Application
Priority
- EP 2005052146 W 20050511
- IT SV20040022 A 20040517
Abstract (en)
[origin: WO2005111500A2] The invention relates to a system for fastening spark plugs (4) for boilers or the like, comprising a retainer (1) for fastening spark plugs (4) of boilers, with an hole housing the ceramic body (104) of the spark plug (4). According to the invention said hole axially projects for a certain length at least on one side of the retainer (1) such to form a cylindrical housing (5) for the ceramic body (104) of the spark plug (4), a cylindrical tightening ring (6, 8) being provided having such inner and external dimensions that it can be inserted by force fit between the inner wall 15 of the cylindrical housing (5) and the external wall of the ceramic body (104) so to generate a predetermined radial tightening force of the spark plug (4) and such to obtain a tight seal between one side and the other one of the retainer (1). In a first embodiment the ring 20 (6) is made of metal having predetermined ductility and deformation capacity characteristics. In a second embodiment, the ring (8) is made of metal having a low deformation capacity and it has a plurality of openings (108, 9) for releasing the radial deformation of the 25 ring (8) when the spark plug (4) is tightened inside the cylindrical housing (5).
IPC 8 full level
F23Q 3/00 (2006.01)
CPC (source: EP US)
F23Q 3/006 (2013.01 - EP US)
Citation (search report)
See references of WO 2005111500A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2005111500 A2 20051124; WO 2005111500 A3 20060601; BR PI0510876 A 20071127; EP 1747402 A2 20070131; IT SV20040022 A1 20040817; MX PA06013486 A 20070612; RU 2006140467 A 20080627; US 2009297998 A1 20091203
DOCDB simple family (application)
EP 2005052146 W 20050511; BR PI0510876 A 20050511; EP 05742857 A 20050511; IT SV20040022 A 20040517; MX PA06013486 A 20050511; RU 2006140467 A 20050511; US 56918605 A 20050511