F - Mech Eng,Light,Heat,Weapons – 01 – L
Patent
F - Mech Eng,Light,Heat,Weapons
01
L
F01L 1/245 (2006.01) F01L 1/14 (2006.01) F01L 1/18 (2006.01) F01L 1/255 (2006.01)
Patent
CA 2367555
A lifter assembly for an internal combustion engine, including an elongate sleeve having an upper radial wall portion provided with oil feed and oil bleed holes therethrough, through which oil respectively enters and exits the lifter assembly. An elongate, hollow lifter body is reciprocatingly disposed within the sleeve, the lifter body being closed at one end thereof. A plunger is reciprocatingly disposed within the lifter body and has an internal cavity, a low pressure oil reservoir at least partially defined by the plunger internal cavity, the low pressure oil reservoir in at least periodic fluid communication with the oil feed hole, whereby oil from the oil feed hole is received into the low pressure oil reservoir. A high pressure oil reservoir is at least partially defined by the plunger and the lifter body closed end, and is in one-way fluid communication with the low pressure oil reservoir, whereby oil is received into the high pressure reservoir from the low pressure oil reservoir. A cap is reciprocatingly disposed within the sleeve and engaged with the plunger. First and second seals are located between an outer circumferential surface of the lifter body and an outer circumferential surface of the cap, respectively, and an inner circumferential surface of the sleeve, the seals respectively located between the oil feed hole and one end of the sleeve, and the oil bleed hole and the other end of the sleeve, whereby oil is precluded from exiting the lifter assembly through the ends of the sleeve.
Janeczko Jason
Koblic David A.
Mason John R.
Sim & Mcburney
Tecumseh Products Company
LandOfFree
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