Free piston internal combustion engine with piston head functioning as a bearing
AssigneeCaterpillar Inc.
InventorsBrett M. Bailey, Willibald G. Berlinger
Life of this patent
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Abstract
A free piston internal combustion engine includes a housing with a combustion cylinder and a second cylinder. A piston includes a piston head reciprocally disposed within the combustion cylinder, a second head reciprocally disposed within the second cylinder, and a plunger rod rigidly attached to each of and interconnecting the piston head and the second head. The piston head defines a bearing with the inside surface of the combustion cylinder. A single bearing is carried by the housing within the second cylinder and reciprocally carries the plunger rod. The single bearing is the only bearing which directly carries the plunger rod.
Claims21
A free piston internal combustion engine, comprising:
- a housing including a combustion cylinder and a second cylinder;
- a piston including a piston head reciprocally disposed within said combustion cylinder, a second head reciprocally disposed within said second cylinder, and a plunger rod rigidly attached to each of and interconnecting said piston head and said second head, said piston head defining a bearing with said inside surface of said combustion cylinder;
- and
- a single bearing carried by said housing within said second cylinder and reciprocally carrying said plunger rod, said single bearing being the only bearing which directly carries said plunger rod.
Dependencies are inferred from the claim text.