Eric D Emmer, Age 67125 Aspinwall Dr, Troy, MI 48098

6507985, Jan 21, 2003

Mar 8, 2000

09/520420

Neil W Loughlin - Ortonville MI
Eric D Emmer - Troy MI

DaimlerChrysler Corporation - Auburn Hills MI

B23P 1904

29229, 29215, 29263, 29255

Tooling and process for installing a split type, circular snap ring into a slotted or grooved wrist pin journal of a piston utilizing an installation sleeve member with an internal bore therethrough which is positioned against the piston so that its bore is aligned with the pistons wrist pin journal. The bore in the installation sleeve including a tapered passage to progressively radially inwardly constrict the snap ring as it moves axially through the installation sleeve. An elongated plunger assembly is moved axially to engage the snap ring and move it through the bore of the installation sleeve. The plunger assembly is sized to permit it to move through the entire extent of the tapered portion and into the pistons journal so that in turn the snap ring is moved into the wrist pin journal and finally into alignment with a retainer slot or groove into which the snap ring can radially expand outwardly into a seated position.

4712941, Dec 15, 1987

Dec 3, 1986

6/937243

Eric D. Emmer - Troy MI

Chrysler Motors Corporation - Highland Park MI

F16C 1106

403151

A tubular piston pin for an internal combustion engine being of lightweight and high strength design with a cylindrical exterior surface and a double hourglass shaped aperture defined by thin-walled end portions; a thin-walled intermediate portion and two thicker-walled portions therebetween. A method for easy and inexpensive piston pin manufacture includes: the formation of half pins by molding a metal slug between two dies each having tapered end portions, punching out a midportion or intermediate web or wall to form an aperture therethrough with a generally hourglass shape, and aligning and joining two half pins axially together to form a piston pin with the double hourglass shaped interior aperture.

4677722, Jul 7, 1987

Dec 16, 1985

6/808968

Eric D. Emmer - Troy MI

Chrysler Motors Corporation - Highland Park MI

B23P 1510
B21D 3102
B21D 2200

291565A

A tubular piston pin for an internal combustion engine being of lightweight and high strength design with a cylindrical exterior surface and a double hourglass shaped aperture defined by thin-walled end portions; a thin-walled intermediate portion and two thicker-walled portions therebetween. A method for easy and inexpensive piston pin manufacture includes: the formation of half pins by molding a metal slug between two dies each having tapered end portions, punching out a midportion or intermediate web or wall to form an aperture therethrough with a generally hourglass shape, and aligning and joining two half pins axially together to form a piston pin with the double hourglass shaped interior aperture.