Method for the manufacture of a piston head having a cooling chamber and piston head obtained from said method
AssigneeMetal Leve S/A Industria E Comercio
InventorsJose M. M. Leites, Jose A. C. Mendes, Andre Lippai
Life of this patent
Estimating the term…
Abstract
A method for the manufacture of a piston head having a cooling chamber is disclosed. The two portions composing the piston head are made separately; the underside of the upper portion is provided with a circumferential peripheral groove; notches are provided on both sides of the open end of the circumferential peripheral groove; a circumferential annular plate is placed on the notches thereby closing the circumferential peripheral groove; the two portions making up the head are joined to each other by welding and cause the inner edge of the annular plate to be retained in the piston head and become an integral part thereof.
Claims10
Method for manufacture of a piston head having a cooling chamber of the closed type, comprising the steps of:
- providing a first blank having a substantially cylindrical section;
- forming on said first blank a peripheral circumferential groove surrounded by an outer wall and forming a central recess and a first circumferential rib therearound which is the inner wall of said groove;
- providing a second blank;
- forming on said second blank a central recess and a peripheral outer recess with a second circumferential rib therebetween;
- placing a circumferential annular plate over the open end of said peripheral circumferential groove of said first blank;
- and
- juxtaposing said first and second circumferential ribs and joining them to join said first blank to said second blank to form the rough piston head with said circumferential annular plate and outer wall of said first blank overhanging said peripheral outer recess of said second blank.
A piston head comprising:
- a first circumferential blank having a cooling chamber defined by a peripheral circumferential groove, a central recess and a first rib between said groove and recess,
- a second blank with an outer peripheral recess and a central peripheral recess defining a second rib therebetween,
- said first and second ribs being juxtaposed and said first and second blanks joined together at said ribs, and
- a circumferential annular plate closing off the first blank circumferential peripheral groove and overhanging the second blank outer peripheral recess.
Dependencies are inferred from the claim text.