Full-flow and by-pass filter conversion system for internal combustion engines

Claim 1

A combination full-flow and by-pass oil filter conversion system for an internal combustion engine adapted for replacing a normal spin-on full-flow filter threadably connected to an oil filter bushing, said engine having a drain plug at a low pressure side of an oil system having an oil pump, said conversion system comprising: adapter means connected to said oil filter bushing by an adapter bushing for sealing said adapter means around said oil filter bushing, said adapter means having at least one oil flow passage generally parallel to said oil filter bushing to allow oil flow from said oil pump therethrough, a cross-bore intersecting said oil flow passage to allow by-pass oil flow therethrough; a high performance full-flow filter threadably connecting to said adapter bushing, after flow of oil through said full-flow filter, said oil being returned through said adapter bushing and said oil filter bushing to said engine; by-pass filter connected through a first flexible hose member to said cross-bore which is connected to a first end of said first flexible hose member to receive said by-pass oil from said oil pump; a base plate between a second end of said first flexible hose member and said by-pass filter, said second end of said first flexible hose member being connected through a first right angle fitting with said base plate to said by-pass filter; second flexible hose member being connected on a first end to said by-pass filter through a second right angle fitting to allow said by-pass oil to flow from said by-pass filter; drain plug having a drain return passage therethrough, said drain return passage having a third right angle fitting connected to a second end of said second flexible hose member to allow said by-pass oil to return therethrough to said low pressure side of said oil pump; and means for mounting said by-pass filter and base plate with respect to said engine; said high performance full-flow filter and said by-pass filter being of such respective densities and filtering capabilities that a great majority of oil flowing from said oil pump flows through said full-flow filter with a minimum pressure drop while the remainder of the oil from said oil pump is said by-pass oil and flows through said by-pass filter; at least one of said first, second, and third right angle fittings are pivotal; said right angle fittings that are pivotal include a hose fitting threadably connected to a right angle boss having a threaded opening intersected by a longitudinal opening therethrough, a hollow screw in flow communication with said by-pass oil flowing through said threaded opening of said right angle fitting to allow said by-pass oil flow through said hollow screw, said hollow screw being sealed with respect to said longitudinal opening; and said right angle fittings that are pivotal further include a plug nut sealably secured to a lower end of said hollow screw, said plug nut providing for right angle connection to either said base plate or adapted to connect to an oil pan of said engine.