The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 06, 1979
Filed:
Jun. 27, 1977
Toyota Jidosha Kogyo Kabushiki Kaisha, Toyota, JP;
Abstract
A glow plug for rotary piston engines adapted to be mounted in an engine plug hole so as not to project from the plug hole and to be traversed by a flow of fuel-air mixture temporarily trapped in the plug hole. The plug includes an elongated protective tube providing a straight root portion by which it is supported from a plug housing adapted to be inserted in a plug hole. The tube terminates in a closed end hook-shaped free tip portion spaced from the root portion and plug housing and lying in the same plane as the root portion. A helical heater coil is disposed in the protective tube with the pitch of the coil being smaller at the free tip portion than at the root portion so that greater heat is generated in the free tip portion than in the root portion.