Two-piece piston assembly
OwnerD. Kent Jonesinventor
Life of this patent
Estimating the term…
Abstract
An improved two-piece assembly having a piston skirt and piston crown made from two different materials. The piston assembly attaching to a piston rod without the use of an external bore in the piston skirt.
Claims20
A piston for use in a cylinder of an internal combustion engine having a piston rod, with a pin receiving opening therein, and a pin for insertion into the pin receiving opening, said piston comprising:
- a piston crown comprising:
- a top portion having an inner surface wherein said inner surface has a plurality of depressions, each depression extending partially, but not fully, through the inner surface of the piston crown thereby increasing the surface area of said inner surface and the rate of heat dissipation from said inner surface and decreasing the weight of said piston crown;
- a cylindrical rim extending from said top portion;
- and
- a pair of pin bosses disposed at least partially within said rim and extending from said inner surface, each of said pin bosses having an opening formed therethrough for receiving an end of the pin.
A piston for use in a cylinder of an internal combustion engine having a piston rod, with a pin receiving opening therein, and a pin for insertion into the pin receiving opening, said piston comprising:
- a piston crown comprising:
- a top portion having an inner surface;
- a cylindrical rim extending from said top portion and having a terminal edge opposed to said top portion;
- and
- a pair of pin bosses disposed at least partially within said rim and extending from said inner surface, each of said pin bosses having an opening formed therethrough for receiving an end of the pin and wherein at least a portion of each of said opening is closer to said inner surface than said terminal edge.
A piston for use in a cylinder of an internal combustion engine having a piston rod, with a pin receiving opening therein, and a pin for insertion into the pin receiving opening, said piston comprising:
- a tubular cylindrical piston skirt;
- and
- a piston crown removably connectable to said skirt, said piston crown comprising:
- a top portion having an inner surface;
- a cylindrical rim extending from said top portion, said rim having a terminal edge opposed to said inner surface and at least one recess;
- a pair of pin bosses disposed at least partially within said rim and extending from said inner surface, each of said pin bosses having an opening formed therethrough adapted for receiving an end of the pin, wherein each of said opening have a common central axis which extends through said recess;
- and
- wherein said piston skirt is adapted to longitudinally confine the pin to a length no more than an inner diameter of said rim when said piston skirt and said crown are connected.
Dependencies are inferred from the claim text.