Welding gun
AssigneeBob Mann & Associates Incorporated
InventorRobert N. Mann
Life of this patent
Estimating the term…
Abstract
A fume-extracting welding gun has an internal fume-extracting passage and comprises a handle member and a head member which have a normally-fixed angular position but which can be adjusted to another selected angular position. The head member has variable dimension passageways therethrough to the fume-extracting passageway to enable the vacuum applied at the welding site by the fume-extracting passageway to be varied by varying the flow of air through the passageways. The passageways are provided by openings in overlapping portions of a sleeve member and the head member and rotation of the sleeve member varies the passageway dimension.
Claims9
A welding gun, comprising:
- a hollow handle member and a hollow head member,
- a welding wire and inert gas-conveying conduit extending generally centrally within the hollow handle member and hollow head member to define a fume extracting passageway within the gun,
- said head member including a sleeve surrounding said conduit adjacent the downstream end thereof and defining therewith an inlet opening to said fume extracting passageway,
- said sleeve having a tubular portion being rotatably mounted relative to a tubular portion of said head member in overlapping relationship, and
- opening means formed in said sleeve tubular portion and opening means formed in said head member tubular portion positioned to define passageway means between the interior and exterior of the head member which is closed by rotation of said sleeve to one extreme position of rotation and which is opened to its maximum dimension by rotation of said sleeve to a second extreme position of rotation.
Dependencies are inferred from the claim text.