EXTENSIBLE BELLOWS

摘要

Extensible mouth bellows for acceleration of flame, as in kindling a campfire, includes four successively nested tubes in longitudinally movable, frictionally retarded movable relation over a limited range between extended and retracted configurations. Shims cooperate with the tubes and with inwardly constricted ends thereof to directionally stabilize the arrangement of tubes and to prevent separation in forward or rearward direction.

主权项

1. Extensible bellows for delivering a fluid stream, comprising:
a plurality of tubes successively nested, each having a nose and a butt, a first one of said plurality of tubes being the outermost and a last one thereof being the innermost, successive ones thereof being relatively longitudinally movable over a range from an extended configuration to a retracted configuration, said extended configuration exposing a major length of the inner of said successive ones outside said nose of the outer thereof, said retracted configuration containing a major length of the inner within the outer and, with reference to said innermost of said plurality of tubes, exposing a minor length thereof.