Free piston internal combustion engine with piston head having a radially moveable cap
First Claim
1. A free piston internal combustion engine, comprising:
- a combustion cylinder having an inside surface; and
a piston reciprocally disposed within said combustion cylinder, said piston including a piston head and a plunger rod, said plunger rod attached to said piston head and having a longitudinal axis, said piston head including a non-metallic cap and a metallic skirt, said cap having an outside surface lying closely adjacent to and defining a bearing surface with said inside surface of said combustion cylinder, said cap being substantially immovably attached to said skirt in a direction parallel to said longitudinal axis of said plunger rod, and movably attached to said skirt in a radial direction relative to said longitudinal axis of said plunger rod.
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Accused Products
Abstract
A free piston internal combustion engine includes a combustion cylinder having an inside surface. A piston which is reciprocally disposed within the combustion cylinder includes a piston head and a plunger rod. The plunger rod is attached to the piston head and has a longitudinal axis. The piston head includes a non-metallic cap and a metallic skirt. The cap has a outside surface lying closely adjacent to and defining a bearing surface with the inside surface of the combustion cylinder. The cap is substantially immovably attached to the skirt in a direction parallel to the longitudinal axis of the plunger rod, and is movably attached to the skirt in a radial direction relative to the longitudinal axis of the plunger rod.
20 Citations
23 Claims
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1. A free piston internal combustion engine, comprising:
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a combustion cylinder having an inside surface; and a piston reciprocally disposed within said combustion cylinder, said piston including a piston head and a plunger rod, said plunger rod attached to said piston head and having a longitudinal axis, said piston head including a non-metallic cap and a metallic skirt, said cap having an outside surface lying closely adjacent to and defining a bearing surface with said inside surface of said combustion cylinder, said cap being substantially immovably attached to said skirt in a direction parallel to said longitudinal axis of said plunger rod, and movably attached to said skirt in a radial direction relative to said longitudinal axis of said plunger rod. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A free piston internal combustion engine, comprising:
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a combustion cylinder having an inside surface; and a piston reciprocally disposed within said combustion cylinder, said piston including a piston head and a plunger rod having a longitudinal axis, said piston head having an outside surface lying closely adjacent to and defining a bearing surface with said inside surface of said combustion cylinder, said piston head and said plunger rod being interconnected together such that said piston head travels with said plunger rod during reciprocal movement of said piston within said combustion cylinder, and said piston head is free to move in a radial direction relative to said longitudinal axis of said plunger rod during said reciprocal movement. - View Dependent Claims (19, 20, 21, 22, 23)
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Specification