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:
Nov. 20, 1984
Filed:
Nov. 09, 1982
Koji Maekawa, Aichi, JP;
Shogo Kawajiri, Aichi, JP;
NGK Spark Plug Co., Ltd., Aichi, JP;
Abstract
A combustion pressure peak detector comprised of a pair of flat annular piezo-electric elements separated by a flat metal electrode plate are located on a bolt for securing a cylinder head to a block of an internal combustion engine. The piezo-electric elements are engaged on opposite sides by two pressure plates adapted to engage the head of the bolt and the cylinder head respectively. At least one of the pressure plates may have a cup-shaped configuration for enclosing the piezo-electric unit and an inter-fitting projection and notch arrangement may be provided on the respective pressure plates to prevent relative rotation between the two pressure plates during tightening of the bolt.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile