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US 6,381,823 B1Granted
Method of fabricating a gas tank
OwnerKyle P. Krejciinventor
Life of this patent
Estimating the term…
Abstract
A method of forming a gas tank includes forming two halves and welding the halves together. Two types of welds are used, tack welds for holding the complete welds after different steps have been taken to the tack weld elements or parts, and stitch welds to complete the welding of the two halves. Reinforcement is added where necessary. Double tanks, for both gasoline and oil, are also fabricated of essentially the same method steps.
Claims5
A method of making a gas tank for a motorcycle comprising the steps of:
- hydroforming two side halves of the motorcycle gas tank;
- tack welding the two side halves together;
- cutting out a portion of the tack welded side halves for a bottom tunnel;
- forming the bottom tunnel;
- welding the formed bottom tunnel to the two side halves;
- forming a bottom rear end piece;
- welding the formed bottom rear end piece to the two side halves;
- welding the tacked side halves to form a tank;
- forming mounting brackets;
- welding the formed mounting brackets to the welded tank;
- drilling holes in the mounting brackets;
- drilling crossover holes and petcock holes;
- placing tapped mounting bungs, crossover bungs, and petcock bungs in the respective drilled holes;
- welding the mounting bungs, crossover bungs, and petcock bungs in their respective holes;
- drill a gas cap fitting hole;
- positioning a gas cap fitting in the gas cap fitting hole;
- welding a gas cap fitting in the gas cap fitting hole;
- positioning a seat pocket plate on the gas tank;
- welding the seat pocket plate to the gas tank;
- cutting off an oil portion to divide the tank into two portions;
- welding plates onto the two portions;
- drilling an oil cap hole;
- welding the two portions together;
- and
- welding an oil cap bung to the oil cap hole.
22 more elements
A method of making a gas tank for a motorcycle comprising the steps of:
- stamping two side halves of the motorcycle gas tank;
- tack welding the two side halves together;
- cutting out a portion of the tack welded side halves for a bottom tunnel;
- forming the bottom tunnel
- welding the formed bottom tunnel to the two side halves;
- forming a bottom rear end piece;
- welding the formed bottom rear end piece to the two side halves;
- welding the tacked side halves to form a tank;
- forming mounting brackets;
- welding the formed mounting brackets to the welded tank;
- drilling holes in the mounting brackets;
- drilling crossover holes and petcock holes;
- placing tapped mounting bungs, crossover bungs, and petcock bungs in the respective drilled holes;
- welding the mounting bungs, crossover bungs, and petcock bungs in their respective holes,
- drill a gas cap fitting hole;
- positioning a gas cap fitting in the gas cap fitting hole;
- welding a gas cap fitting in the gas cap fitting hole;
- positioning a seat pocket plate on the gas tank;
- welding the seat pocket plate to the gas tank;
- cutting off an oil portion to divide the tank into two portions;
- welding plates onto the two portions;
- drilling an oil cap hole;
- welding the two portions together;
- and
- welding an oil cap bung to the oil cap hole.
22 more elements
Dependencies are inferred from the claim text.