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US 8,549,989 B2Granted
Piston apparatus for engine
AssigneeHyundai Motor Company
InventorsJeyong Yun, Byungcheol Lee
Life of this patent
Estimating the term…
Abstract
A piston apparatus for an engine includes a piston pin that is inserted in a smaller end portion of a connecting rod and having a cross-section changing portion where a cross section changes at a portion of the piston pin, and a fixing member that engages the connecting rod and a piston through the cross-section changing portion so as to restrain longitudinal movement of the piston pin with respect to the connecting rod.
Claims11
A piston apparatus for an engine, comprising:
- a piston pin rotatably inserted in a smaller end portion of a connecting rod and having a cross-section changing portion where a cross section changes at a portion of the piston pin;
- and
- a fixing member rotatably engaging the connecting rod and a piston through the cross-section changing portion to restrain longitudinal movement of the piston pin with respect to the connecting rod;
- wherein the cross-section changing portion of the piston pin is a piston pin groove depressed from an outer surface of the piston pin in a ring shape with a predetermined depth;
- and
- wherein the fixing member is a connecting pin passing through and inserted in the smaller end portion of the connecting rod and being coupled in the piston pin groove of the piston pin in the smaller end portion of the connecting rod;
- wherein the connecting pin is formed in a U-shape having two straight portions parallel with each other and a connecting portion connecting ends of the two straight portions, and
- the two straight portions are inserted in two connecting holes formed in the smaller end portion of the connecting rod and coupled to each piston pin groove.
5 more elements
A piston apparatus for an engine, comprising:
- a piston;
- a connecting rod rotatably combined with the piston;
- a piston pin rotatably combined with the connecting rod at the center thereof and having both ends rotatably connected to the piston;
- and
- a fixing member rotatably fixing the connecting rod and the piston pin such that the piston pin is allowed to rotate with respect to the connecting rod and prevented from moving straight in the longitudinal direction;
- wherein a piston pin groove is formed in the piston pin;
- wherein the fixing member is a connecting pin passing through and inserted in a smaller end portion of the connecting rod and being coupled in the piston pin groove of the piston pin in the smaller end portion of the connecting rod;
- wherein the connecting pin is formed in a U-shape having two parallel straight portions and a connecting portion connecting the ends of the straight portions, and
- the piston pin groove is formed in a ring shape along the circumference at the longitudinal center of the piston pin;
- wherein connecting holes are formed longitudinally in the smaller end portion of the connecting rod such that the straight portions of the connecting pin are inserted, and
- a connecting portion groove connecting ends of the connecting holes such that the connecting portion of the connecting pin is inserted is formed at the smaller end portion of the connecting rod.
8 more elements
Dependencies are inferred from the claim text.