Patents
Sitemap › H01 - Basic electric elements › H01T - Spark gaps; Overvoltage arresters using spark gaps; Sparking plugs; Corona devices; Generating ions to be introduced into non-enclosed gases › H01T 21 - Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs
Patents for H01T 21 - Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs (1,750)
05/1993
05/11/1993US5210457 Outer electrode for spark plug and a method of manufacturing thereof
05/05/1993EP0540159A1 Manufacture of spark plugs
04/1993
04/20/1993US5204579 Ceramic insulator for spark plug structure
04/07/1993EP0535584A2 Spark plug and method of producing same
02/1993
02/23/1993CA1313751C Method for manufacturing electrodes for a spark plug
01/1993
01/12/1993US5179313 Forming an erosion resistant tip on an electrode
10/1992
10/27/1992US5159233 Spark plug and method for assembling a spark plug
09/1992
09/30/1992EP0505368A1 Process for making electrodes for sparking plugs and sparking plug electrodes.
07/1992
07/01/1992EP0491732A1 Forming an erosion resistant tip on an electrode.
05/1992
05/12/1992CA1300358C Method for manufacturing a center electrode for a spark plug
04/1992
04/15/1992EP0480671A1 Spark plug and method for making it
04/15/1992EP0480670A1 Spark plugs with universal components
04/12/1992CA2052975A1 Spark plugs with universal components
04/12/1992CA2052974A1 Spark plug and method for making it
04/07/1992CA1298460C Method for manufacturing a center electrode for a spark plug
03/1992
03/31/1992US5101135 Spark plug for use in an internal combustion engine
03/19/1992WO1992004754A1 Electric spark-generating ignition device, especially for gaseous fuels
03/12/1992DE4028399A1 Elektrische, funkenerzeugende zuendvorrichtung, insbesondere fuer gasfoermige brennstoffe Electrical, ignition spark producing, especially for gasfoermige fuels
03/11/1992EP0474351A1 An outer electrode for spark plug and a method of manufacturing thereof
03/03/1992US5092803 Method and apparatus for forming a spark plug
02/1992
02/18/1992US5088311 Method of making a tubular member
02/11/1992CA1295466C Composite center electrode for a spark plug and method of producing same
01/1992
01/10/1992CA2020685A1 Air craft spark plug twist a gap, and spreader
10/1991
10/17/1991WO1991015887A1 Spark plug for internal combustion engine
08/1991
08/22/1991DE4104622A1 IC engine spark plug fitting socket - has socket sleeve with hooks at ends of axial slots engaging spark plug projections
06/1991
06/27/1991WO1991009438A1 Process for making electrodes for sparking plugs and sparking plug electrodes
06/26/1991CN1052577A Spark plug electrodes and process for making thereof
06/25/1991US5026294 Ignition plug socket structure
06/20/1991DE3941649A1 Verfahren zur herstellung von elektroden fuer zuendkerzen sowie zuendkerzen-elektroden Process for the manufacture of electrodes for spark plugs and spark plug
06/11/1991US5022881 Method for making a spark plug with a predetermined spark gap
03/1991
03/27/1991EP0418307A1 Method for manufacturing electrodes for a spark plug
03/20/1991EP0418055A1 Spark plug
03/19/1991US5001432 Ignition test probe
02/1991
02/21/1991WO1991002393A1 Forming an erosion resistant tip on an electrode
02/05/1991US4991195 Apparatus and method for testing a telephone circuit protector
01/1991
01/16/1991EP0407987A1 Method of manufacturing gas sealed discharge tube
12/1990
12/27/1990EP0404570A2 A method of making a tubular member
12/25/1990US4980609 Spark gap purge system
12/05/1990EP0400950A1 Spark plug
10/1990
10/16/1990US4963112 Treating noble metal facing on electrode with laser beams to form alloy zone
09/1990
09/12/1990EP0386941A2 Spark plug and method
09/11/1990US4955143 Apparatus and method for controlling and adjusting the geometric relationship between electrode tips of an underwater spark device
08/1990
08/28/1990US4952837 Surface gap type igniter plug
08/16/1990EP0382228A1 Device to adjust the position of elongated electrodes
04/1990
04/24/1990CA1268020A1 Method for producing a composite center electrode for spark plug
03/1990
03/28/1990EP0360426A1 A method of moulding ceramic insulators for use in spark plugs
02/1990
02/27/1990US4904216 Process for producing the center electrode of spark plug
02/21/1990EP0355052A1 Method for manufacturing a spark plug electrode
02/21/1990CN1039933A Method for manufacturing electrodes for spark plug
02/20/1990US4901687 Spark plug index plate for combustion engines
01/1990
01/09/1990US4893051 Platinium alloy tip
01/03/1990CN1038549A Method for manufacturing electrodes for spark plug
12/1989
12/14/1989WO1989012339A1 Method for manufacturing electrodes for a spark plug
12/14/1989WO1989012338A1 Method for manufacturing electrodes for a spark plug
11/1989
11/28/1989US4882925 Method of making terminal nut for ignition plug by plastic working
11/15/1989EP0341807A2 A spark plug
10/1989
10/03/1989US4871339 Spark plug crimping die and process
09/1989
09/19/1989US4868791 Method and apparatus for detecting and correcting the positions of electrodes, in particular in shock wave generator apparatus using a feeler finger, e.g. the rod of an actuator, movable to the focus
09/12/1989US4866330 Device for advancing an electrode-holder element and use thereof in a shock wave generating apparatus
08/1989
08/30/1989EP0329721A1 Process for manufacturing a spark plug for internal combustion engines
06/1989
06/20/1989US4840594 Method for manufacturing electrodes for a spark plug
05/1989
05/03/1989DE3735392A1 Central electrode design for a spark plug
05/02/1989US4826462 Method for manufacturing a spark plug electrode
04/1989
04/25/1989US4825184 Current controlled inductor
03/1989
03/07/1989US4810220 Stable gap
02/1989
02/23/1989WO1989001717A1 Process for manufacturing a spark plug for internal combustion engines
02/07/1989US4803395 Process for the manufacture of a platinum-tipped bimetallic central electrode for an ignition plug and the electrode produced according to this process
11/1988
11/22/1988US4786267 Spark plug
10/1988
10/25/1988US4779789 Method and apparatus for constructing an electrical contact
10/05/1988EP0285469A1 Method and apparatus to detect and correct the electrode position, in particular for shock wave generators with a hydraulic jack as a feeler in the focal point
09/1988
09/29/1988DE3709194A1 Loop which can be plugged onto a spark plug connector
09/15/1988DE3707197A1 Method for testing the leakproofness of electrical devices, in particular surge voltage protectors, accommodated in a housing sealed in a gastight fashion
09/13/1988US4771210 Spark plug with electrodes having noble metal inserts
06/1988
06/15/1988EP0270746A1 Method for manufacturing a center electrode for a spark plug
06/01/1988EP0268757A1 Method for manufacturing a center electrode for a spark plug
05/1988
05/11/1988DE3637626A1 Method for fixing a metal pin within a ceramic insulating body
05/10/1988US4743793 Spark plug
03/1988
03/30/1988EP0262005A1 Method of making a bimetallic central electrode with a platinum tip for a sparking plug, and electrode obtained by this method
03/29/1988US4734580 Built-in ionizing electrode cleaning apparatus
03/22/1988CA1234281A1 Method for assembling a spark plug
03/15/1988US4730614 Device for advancing an electrode-holder element in an apparatus generating pulses for the destruction of targets such as kidney stones
02/1988
02/16/1988US4725254 Method for manufacturing a center electrode for a spark plug
02/04/1988DE3625363A1 Spark plug for internal combustion engines and method for producing such a spark plug
11/1987
11/10/1987US4705486 Method for manufacturing a center electrode for a spark plug
11/04/1987EP0243529A1 Spark plug
10/1987
10/21/1987EP0242237A1 Device for advancing an electrode carrier in a shock-wave generator
10/13/1987US4699600 Spark plug and method of manufacturing the same
09/1987
09/22/1987US4695759 Method for producing a composite center electrode and an electrode
08/1987
08/04/1987US4684352 Method for producing a composite spark plug center electrode
02/1987
02/17/1987US4643688 Method for assembling a spark plug
10/1986
10/07/1986US4616155 Overvoltage discharger for coaxial cables and method of making same
09/1986
09/09/1986US4611142 Self-pumped spark gap
08/1986
08/19/1986US4606730 Bimetal electrodes for spark plugs or the like and method of making same
05/1986
05/21/1986EP0181476A1 Method and manufacturing a spark plug for internal combustion engines
04/1986
04/29/1986US4585421 Method of making copper-clad bimetal electrodes for spark plugs
04/29/1986US4584744 Apparatus for assembling and forming parts
04/22/1986CA1203510A1 Spark plug electrode and its method of manufacture
03/1986
03/11/1986US4575343 Bimetal electrode and method of making same
01/1986
01/07/1986US4563158 Fuel ignition device and method of assembling same
01/07/1986CA1198951A1 Method for producing a composite center electrode
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