Gas tank measuring and closure device

Claim 1

In combination with the fuel tank of a vehicle having an engine requiring an additive to the fuel, portions of said tank defining a fill opening therein, a device adapted for alternative closure and measuring use positions with said tank, said device including a cap member adapted to engage said tank portions so as to close said opening therein and further having an upper portion adapted to extend outwardly of said tank when said device is disposed in said closure position, an elongated hollow tubular member downwardly projecting from a lower surface of said cap member when said device is disposed in said closure use position, said tubular member having a container portion adapted to receive and measure said additive in proportion to fuel being added when said device is removed from said tank in its measuring use position, and said cap member forming a holding member for said device for enabling a user thereof to hand manipulate said device in both of said alternative use positions thereof, said tubular member being a cylinder, said upper cap portion being of cylindrical shape having an indented outer peripheral surface, said device including a flange radially extending from said cap, said flange including means for sealingly engaging said portions of said tank defining said opening, outer portions of said cylinder proximal to said cap including thread means for connecting said device to said tank and lower portions of said cap when said device is in its closure use position extending into said cylinder so as to space said cylinder container portion from other portions of said cap.