Drain return for engine

Claim 2

A two-stroke internal combustion engine including a cylinder, wall means defining a fuel supply passage communicating with said cylinder, and a drain return line communicating with a source of fuel drains and supported by said wall means and including an end part having a bore with a diameter less than about one-eighth of an inch and terminating in spaced opposing relation to one portion of said wall means at a distance less than about oneeighth of an inch, whereby drains exiting from said return line splash against said wall portion and are broken into droplets for delivery to said cylinder.

Claim 3

An engine in accordance with claim 1 wherein said engine also includes a crankcase, wherein said fuel supply passage comprises a transfer passage communicating with said cylinder and said crankcase, and wherein said drain return line communicates with said crankcase during periods of positive pressure in said crankcase.

Claim 4

An engine in accordance with claim 2 wherein said drain return line has a bore with an internal diameter of approximately one-sixteenth of an inch extending substantially from said crankcase to said transfer passage.

Claim 5

An engine in accordance with claim 1 wherein said end part is spaced at about one-sixteenth of an inch from said wall portion.

Claim 6

An engine in accordance with claim 1 wherein said drain return line comprises a tube including said end part and having a bore with a diameter of about one-sixteenth of an inch.

Claim 7

An engine in accordance with claim 1 wherein said drain return line includes a conduit and a fitting comprising a bolt which includes a head and an axial bore and which is threaded into one section of said wall means and a tube fixed in said bore and including, at the end opposite from said head, said end part and, at the end thereof adjacent said head, a nipple connected to said conduit.

Claim 8

A two-stroke internal combustion engine including a cylinder, a crankcase, wall means defining a fuel transfer passage communicating between said crankcase and said cylinder and a drain return line supported by said wall means and extending from and communicating with said crankcase, said drain return line including a conduit having an axial bore communicating with said crankcase and a fitting comprising a bolt which includes a head and an axial aperture and which is thReaded into one section of said wall means, and a tube which is fixed in said bolt aperture, which includes at the end thereof adjacent said head, a nipple connected to said conduit, which includes, at the other end, an end part terminating in opposed relation to one portion of said wall mans at a distance therefrom of about 1/16 of an inch, and which has an axial bore communicating with said conduit axial bore, said axial bores having a diameter of about 1/16 of an inch.

Claim 9

A two-stroke internal combustion engine including a cylinder, a crankcase, wall means defining a fuel transfer passage communicating between said crankcase and said cylinder and a drain return line supported by said wall means and extending from and communicating with said crankcase, said drain return line including a conduit having an axial bore communicating with said crankcase and a fitting comprising a bolt which includes a head and an axial aperture and which is thReaded into one section of said wall means, and a tube which is fixed in said bolt aperture, which includes at the end thereof adjacent said head, a nipple connected to said conduit, which includes, at the other end, an end part terminating in opposed relation to one portion of said wall mans at a distance therefrom of about 1/16 of an inch, and which has an axial bore communicating with said conduit axial bore, said axial bores having a diameter of about 1/16 of an inch.