Cast engine cylinder having an internal passageway and method of making same
AssigneeTecumseh Products Company
InventorGar M. Adams
Life of this patent
Estimating the term…
Abstract
A cast cylinder for an internal combustion engine having an intake valve cavity located on one side of the piston bore, an intake bore for communication with a carburetor located on the other side of the piston bore, and an internal passageway cast therein communicating the intake bore and the intake valve cavity. The internal passageway is curved and circumscribes a portion of the intake bore. A walled hollow tube having initially closed ends is embedded in the cast cylinder during casting as a permanently retained casting core. Subsequently the ends of the embedded tube are machined open to communicate with the intake valve cavity and the intake bore, respectively, to define the internal passageway.
Claims8
A cast cylinder assembly for an internal combustion engine comprising:
- a cast cylinder including a piston bore, an intake valve cavity, an intake bore communicating externally of said cast cylinder with ambient air and located on a side of the piston bore opposite said intake valve cavity, and a cast-in-place walled tube embedded in said cast cylinder and defining an internal passageway circumscribing a portion of the piston bore and communicating said intake bore and said intake valve cavity.
Dependencies are inferred from the claim text.