Abstract: The present invention refers to a glow plug comprising a ceramic glow pencil (1), a protective tube (2) enclosing the glow pencil (1), a plug body (3) from which the protective tube (2) projects and a sleeve (4), which encloses the protective tube (2) and which is welded to the protective tube (2), is fitted in the plug body (3).

Abstract: There is described a shaped object adapted for being connected with a rim at a point located inside the rim well (7), having a contact surface (2) intended to rest on the rim well. It is provided according to the invention that the contact surface (2) intersects each of a set of mutually parallel first planes (3) along a curved curve (5), which is not merely an arc of a circle and whose distance from a second plane (6), that subdivides the contact surface (2) and that extends perpendicularly to the first planes (3) increases with a decreasing growth rate, at least in average, at least on one side of the second plane (6).

Abstract: Composite conductor comprising a metallic conductor and a ceramic conductor or non-conductor, at least one of them being elongate, the two being connected with each other in an electrically conductive manner. The ceramic conductor or non-conductor and the metallic conductor are hard-soldered to each other by a contact surface extending obliquely to the longitudinal direction of the at least one elongate conductor, and has one of the conductors tapers at its end and the other conductor has a matching tapering recess. The tapering end of the conductor is fitted into the tapering recess.

Abstract: A method for manufacturing a ceramic glow pin which is formed of more than two layers arranged especially coaxially to the axis of the glow pin and symmetrically. The layers of the layer structure are manufactured by co-extrusion.

Abstract: There is described a shaped object adapted for being connected with a rim at a point located inside the rim well (7), having a contact surface (2) intended to rest on the rim well. It is provided according to the invention that the contact surface (2) intersects each of a set of mutually parallel first planes (3) along a curved curve (5), which is not merely an arc of a circle and whose distance from a second plane (6), that subdivides the contact surface (2) and that extends perpendicularly to the first planes (3) increases with a decreasing growth rate, at least in average, at least on one side of the second plane (6).

Abstract: A method for manufacturing a ceramic glow pin which is formed of more than two layers arranged especially coaxially to the axis of the glow pin and symmetrically. The layers of the layer structure are manufactured by co-extrusion.

Abstract: A method for manufacturing a glow pin for a ceramic glow plug which is constructed of an inner cylinder and at least one outer layer that is coaxial to the inner cylinder and/or a base layer or cover layer on the front face. The at least one coaxial outer layer and/or the front-face layer is formed by thermal spraying.

Abstract: A water preheating connection piece (6) including a connection body including a water flow channel (6a) and a bore hole (7), at least one heating rod (1) having an internal heating element and at least one regulating element for insertion into the bore of the connection body, the at least one heating rod projecting into the water flow channel (6a), the heating rod (1) including a connection pole (3) that extends from the heating rod (1) whereby the connection pole is electrically insulated from the heating rod (1). The heating rod (1) does not include external threads and the bore hole of the connection body does not include internal threads so as to permit the heating rod (1) to be press-fit therein.

Abstract: A water preheating connection piece (6) including a connection body including a water flow channel (6a) and a bore hole (7), at least one heating rod (1) having an internal heating element and at least one regulating element for insertion into the bore of the connection body, the at least one heating rod projecting into the water flow channel (6a), the heating rod (1) including a connection pole (3) that extends from the heating rod (1) whereby the connection pole is electrically insulated from the heating rod (1). The heating rod (1) does not include external threads and the bore hole of the connection body does not include internal threads so as to permit the heating rod (1) to be press-fit therein.

Abstract: A glow plug including a heating rod having a plug body composed of an electrically insulating plastic material, an inner pole connected to heating elements, and optionally, control elements, and an outer pole which is electrically insulated from adjoining components of the plug body by an insulative material provided between an inner and outer support tube, the inner support tube surrounding the heating rod while the plug body surrounds the outer support tube.

Abstract: A glow plug including a glow plug body formed from a single piece tube, the single piece tube including a plug tip area with a glow element disposed therein, a control area with a control element disposed therein, and a connection area with an inside connection lead adapted to be connected to an electrical terminal where the plug tip area has a different diameter than the control area and/or the connection area of the single piece tube.

Abstract: A rod glow plug comprises a glow tube, inner heating coil(s) and optionally control coil(s), and a terminal pole which leads into the glow tube, the coil(s) being connected to the terminal pole and glow tube tip, there being a stabilizer rod (10) which extends in an assembly stage from the terminal pole (9) to the glow tube tip, optionally into an opening in the glow tube tip or through it, and the stabilizer rod (10) being located essentially in the middle running through the coil(s).

Abstract: A glow plug including plug body composed of an electrically insulating plastic material, a heating rod having an inner pole connected to heating elements, and optionally, control elements, and an outer pole which is electrically insulated from adjoining components of the plug body.