Leak detector for engine chambers

Claim 1

A leak detector for detecting leakage in a passageway comprising: a sealing cap adapted to fit against and seal one end of a passageway, and including means for attaching a rod to said cap and oriented to pass through and extend out of the opposite end of the passageway; an elongated rod threaded on one end, and including attachment means at the opposite end for attachment to said sealing cap; a pressure application and measurement enclosure assembly comprising: a generally cylindrical-shaped chamber having regions with an open end and a closed end, and a sealing ring adapted to fit around said open end, and sealably coupling said open end to said passageway, said closed end region of said chamber including a plurality of threaded sockets adapted to receive said threaded end of said rod, one of said threaded sockets being concentric and extending along a line normal to said open end of said chamber, one of said sockets being at an angle of 12° with respect to a line parallel to said axis of said first-named socket, and one of said sockets being positioned at an angle of 14° with respect to a line parallel to said first-named socket, a pressure gauge coupled to the interior of said chamber, and pressure valve means coupled to the interior of said chamber for selectively applying gas pressure to and releasing gas pressure from the interior of said chamber; whereby said rod may be passed through said passageway and selectively inserted into one of said sockets at an appropriate angle, and then said rod tightened to effect an aligned seal between said cap and an end of a said passageway.