Patent ID: 9593661
Date: 2017-03-14
CPC Classifications: F02F,F02P,F23Q

Claim:
1. A preheater assembly for a cylinder head of a piston engine, the preheater assembly being provided with a glowplug comprising in succession a connection terminal followed by a body and a heater tip, the body presenting a bottom end forming a first conical bearing surface and a top end having a first thread, wherein the preheater assembly includes a hollow sheath extending longitudinally from a bottom external zone to a top external zone, the sheath extending radially from an inside surface defining a cavity towards an outside surface, the glowplug being inserted in the cavity, the tip projecting from the sheath through the bottom external zone, the inside surface of the sheath presenting a second thread in the top external zone meshing with the first thread of the glowplug, the inside surface of the sheath presenting a first conical seat in the bottom external zone bearing against the first conical bearing surface of the glowplug, the outside surface of the bottom external zone having a third thread suitable for being screwed into a fourth thread of the cylinder head and a second bearing surface that is to bear against a second seat of the cylinder head.