Patent ID: 6240888
Filing Date: 2001-06-05
Classification: F01L,F02B

Abstract:
An internal combustion engine decompression valve kit for an internal combustion engine comprising: p1 a spark plug, said spark plug being of the hot type having an elongated threaded base and modified to have a slot cut into a sidewall of a said elongated threaded base to allow cylinder pressure to escape to the exterior of said sidewall, and wherein said spark plug is to be installed in a spark plug port of said engine in place of the regular spark plug;a valve, said valve having a valve base and an interior chamber;a valve plunger, said valve plunger located on the top of said valve and normally biased in the closed position for placing the interior chamber of said valve in fluid communication with the atmosphere;a gas port chamber, said gas port chamber being ring shaped and having an aperture in a center for receiving therethrough said spark plug, wherein said gas port chamber encapsulates said elongated threaded base of said spark plug between the base of the spark plug and the cylinder head of said engine and receives cylinder pressure from said exterior of said elongated threaded base of said spark plug; anda vent tube, said vent tube connected to said gas port chamber, and wherein an opposite end of said vent tube is connected to said valve base of said valve, and further, said vent tube places said gas port chamber in fluid communication with said the interior chamber of said valve;and wherein said vent tube consists of a short piece of formed or contoured steel tubing approximately two inches long, with an 0.180 inch outer diameter and an 0.089 inch inner diameter, and wherein all of said connections to said valve base and said gas port chamber are welded or brazed.