Patent ID: 6494492
Filing Date: 2002-12-17
Classification: A47L

Abstract:
A suction pipe of a vacuum cleaner, wherein a length of said suction pipe may be controlled by inserting or drawing out an outer pipe to or from an inner pipe, said suction pipe comprising:a guide pipe connected to the outer pipe; a sliding unit movable in relation to said guide pipe in a longitudinal direction of said outer pipe; a first spring and a second spring; a first control home and a second control home formed in said inner pipe and fixedly connecting said inner pipe; and an oval stopper pin hookable in either of said pair of control homes formed in said inner pipe and fixedly connecting said guide pipe and said inner pipe, wherein said oval stopper pin is biased by a spring force of the first spring and the second spring, said second spring exerting a second spring force in an adjusted position of said suction pipe on said oval stopper pin equivalent to a first spring force of the first spring but in an opposite direction.