F - Mech Eng,Light,Heat,Weapons – 02 – F
Patent
F - Mech Eng,Light,Heat,Weapons
02
F
121/90
F02F 3/02 (2006.01) F16J 1/04 (2006.01) F16J 1/18 (2006.01)
Patent
CA 1191750
A REDUCED IMPACT PISTON ASSEMBLY Abstract of the Disclosure A reduced impact piston assembly including a cylindrical body with a cavity formed therein and having a cross-bore formed therethrough which intersects the cavity. The cross-bore receives a piston pin which has an exposed intermediate portion aligned with the cavity for attachment of a connecting rod thereto. A wide groove is formed about the outer circumference of the cylindrical body which has its center aligned with the center of the cross-bore. Positioned within this groove are a pair of C-shaped inserts, the legs of which abut the ends of the piston pin to prevent axial movement of the pin within the cylindrical body. The C-shaped inserts cooperate with the pin to form a closed loop having a circumferential length which is larger than the circumferential length of the cylinder body. In addition, a portion of each of the C-shaped inserts is in constant contact with a cylinder wall. The C-shaped inserts are constructed of a material having a thermal expansion which is similar to the thermal expansion of the cylinder wall and less than the thermal expansion of the cylindrical body. These features cooperate together to insure that constant contact is maintained between the inserts and the cylinder wall at both cold and hot operating conditions thereby minimizing the presence of piston slap within the cylinders of an engine. The reduction of piston slap will minimize the noise of the engine and greatly reduce the amount of cavitation experienced on the outside of the cylinder wall.
423613
Hauser Herbert J. Jr.
Kabele Dennis F.
Borden Ladner Gervais Llp
Deere & Company
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