Abstract: In a parted corrugated spacer-expander for use in a piston oil control ring of the type which includes a circumferential series of alternating inner and outer crowns successively connected by radially diverging spring legs having oil drain openings formed therein, an improved slip latch comprising a curved rod having a radius of curvature equal to or less than the free-state radius of curvature of the expander. One end of the latch extends through at least one leg opening adjacent one expander end and terminates in a stop having an axial dimension which prevents passage through the leg openings. The other latch end extends over an arc of at least seventy-five degrees through a plurality of leg openings in the opposite expander end and is free to slide through the leg openings.

Abstract: A parted annular piston sealing ring and a method for manufacture thereof wherein an inwardly facing ring surface adapted to be engaged by an expander-spring for expanding the ring into sealing engagement with a cylinder wall is hardened in a zone immediately adjacent the parted ring tips. Hardening of the spring-engaging surface at the ring tips reduces wear and embedment between the ring and spring in the region of the ring gap while permitting resilient flexure of the ring in regions removed from the ring gap to follow surface variations in a cylinder wall.

Abstract: A transmission fluid filter having a fluid outlet comprising a sheet metal base member with a plurality of upstanding spaced support bosses. A polyester fiber mesh is molded into a plastic filter frame which includes a peripheral edge for attachment to the base member and a plurality of ribs extending generally from the region of the fluid outlet to the frame edge and supported by the bosses to form a fluid cavity between the mesh and the base member.

Abstract: A pipe joint specifically adapted for an oil pump inlet screen, and a method of assembly therefor, comprising a metal pipe adapted at one end to be connected to an oil pump housing and a filter screen including a molded plastic screen housing having an aperture adapted to receive the other pipe end. A metal eyelet is molded into the plastic housing and extends therefrom to embrace a circumferential rib formed on the outside surface of the pipe. An annular resilient sealing ring surrounds the pipe and is captured by the eyelet in sealing compression between the circumferential rib and the housing.

Abstract: In a parted spacer-expander for a piston oil control ring of the type which includes an array of alternating inner and outer crowns connected by generally diverging spring legs and a support pad extending radially from each inner crown and connected thereto by a pad leg, an improved slip latch comprising a curved rod having a substantially D-shaped cross section and having a radius of curvature equal to or less than the free-state radius of curvature of the spacer-expander. One end of the latch extends through at least one leg opening formed between the spring legs and pads adjacent the expander ends and is formed with a stop having an axial dimension which prevents passage through the leg openings. The other latch end extends over an arc of at least seventy-five degrees through a plurality of leg openings in the opposite expander end and is free to slide through the leg openings.

Abstract: A roller tappet includes a central valve lifter body having a bifurcated end. A roller is supported at the bifurcated end and adapted for engagement by the lobes of a cam shaft. The valve lifter body reciprocates within a cylindrical bore defined by a cast iron engine block. The roller tappet body is formed from a ductile iron material thereby decreasing side wall wear and substantially eliminating galling between the valve lifter body and the wall of the cast iron tappet bore.

Abstract: In a parted corrugated spacer-expander for a piston oil control ring, an improved expander end joint for preventing installation of the expander should overlap occur between the expander ends in which the respective expander ends are each formed in a multiple-bend box-like structure which is self-supporting under stress from the opposing expander end in either the circumferential or the radial direction.

Abstract: In a spacer-expander for a piston oil control ring of the type which includes a circumferential series of alternating inner and outer crowns successively connected by radially diverging spring legs and a support pad extending radially outwardly from each inner crown and connected thereto by a pad leg, the improvement wherein each pad leg comprises an arcuate reverse bend extending radially inwardly and then radially outwardly from an inner crown to a corresponding support pad. In a modification, each pad extends radially outwardly at an angle of more than 90.degree. but equal to or less than 95.degree. with respect to the corresponding inner crown in the free-state of the expander.

Abstract: In a composite oil control ring for reciprocating piston internal combustion engines which includes a relatively soft parted cast iron ring and an expander-spring disposed internally of the ring to bias the same into sealing engagement with a cylinder wall, a parted annular insert rail of wear-resistant metal is disposed between the expander and the ring to reduce wear on the ring and to prevent embedment or unitization of the ring and spring. The insert rail is generally V-shaped in radial cross section to provide an enhanced bearing area for sliding between the insert and spring, and to reduce potential blockage by the spring of aligned oil drain ports in the insert and the ring.

Abstract: A hydraulic lash adjuster for use with an internal combustion engine having an overhead cam, includes a stationary body received within a cylinder head bore and a plunger reciprocal within the body. The plunger includes a central cavity defining an oil reservoir. A passage is formed through the lash adjuster body to place the oil reservoir in fluid communication with the lubrication system of the engine. A pair of metering lands are formed on the exterior of the lash adjuster body adjacent the oil inlet passage to reduce the pressure of the oil in the oil reservoir to prevent pump-up.

Abstract: An oil seal for rotary piston internal combustion engines, and method of making the same, comprising a spacer-spring disposed in a circular groove in the rotary piston end face, and a pair of annular oil scraping rails radially spaced from each other within the groove and urged into sealing engagement with the rotor housing end wall by the spacer-spring. The spring includes a pair of circular concentric bands which rest upon the groove root, and a plurality of circumferentially spaced struts connecting the bands and acting to space the rails from each other against respective groove side walls. A plurality of circumferentially spaced spring legs extend from each of the circular bands generally radially across the groove to engage the radially opposite oil scraping rail and urge the rail against the housing end wall.

Abstract: One end of the hollow valve lifter body is bifurcated forming two spaced supports. A roller is rotatably supported between the supports by a shaft and the circumferential edge rotates in a recess in the body end formed by plunge milling the wall portions of the body intermediate the support and providing a counterbore at the bifurcated end. Preferably, the counterbore is formed simultaneously with the fabrication of the body.

Abstract: A loading device for installation of rotary engine oil sealing rings into paired concentric circular grooves in a rotor end face comprising an annular sleeve having an inside diameter equal to the outside diameter of the radially inner groove and an outside diameter equal to the inside diameter of the radially outer groove, which sleeve rests upon the rotor end face in the annular surface area between the two grooves. The sleeve has a pair of generally radially facing inner and outer conical surfaces converging axially outwardly of the rotor for gradual loading of the resilient elastomeric static oil seals during axial installation thereof into the respective grooves.