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. 02, 1976
Filed:
Nov. 21, 1975
Robert J Seccombe, Detroit, MI (US);
Edwin E Rice, Ann Arbor, MI (US);
William F Hurtubise, Plymouth, MI (US);
Ronald K Mudge, Brighton, MI (US);
Ingersoll-Rand Company, Woodcliff Lake, NJ (US);
Abstract
A tool and method for automatically adjusting internal combustion engine valve lash is disclosed. The engine is first rotated to correctly position the valve lifter cam for the individual valve which is to be adjusted. The novel tool of this invention is then positioned and sequenced through a series of operations which properly set the valve lash or preload, whichever is required. The system uses a linear variable differential transformer probe in the preferred embodiment to establish when the valve is seated. The valve lash adjusting means is advanced until the rocker arm engages the valve stem. The initial movement of the valve stem is sensed by a linear variable differential transformer and a zero reference is established at the point where the valve just begins to move. The valve lash adjusting means is then rotated out until the valve stem returns to the established zero position at which point the valve lash adjusting means is further rotated out a specified number of degrees which, utilizing the adjusting means as a micrometer, accurately sets the required valve lash.