Telescopic suction pipe for suction cleaner

Application Number: 00108395
Application Date: 2000.05.17
Publication Number: 1275362
Publication Date: 2000.12.06
Priority Information: 1999/5/28 DE 19924450.2
International: A47L9/24
Applicant(s) Name: Karl Froe AG
Inventor(s) Name: Gothard Gitelman;Alaf Ganse;Jurgen Himan
Patent Agency Code: 11038
Patent Agent: sun zheng
Abstract An extendable and contractible suction pipe for vacuum cleaner compries an outer pipe, an inner pipe provided with an engaging edge extending in an axial direction and at least one engaging member having an engaging surface and movable in the direction of the longitudinal center axis of the suction pipe of a vacuum cleaner area provided. This engaging member is temporarily fitted into the engaging notch of an engaging edge provided with an opposed engaging surface, and a sleeve arranged at the outer pipe, grasping the inner pipe from an upper side and including a housing is provided. In this housing, the engaging member, a spring for securing an engaging position and an operation device for the engaging member are arranged. The aim of the invention is to provide a novel telescopic sleeve or suction pipe for vacuum cleaner wherein it is impossibale to emergence vateities of problem caused by structure. To achieve the aim, such measure is adopted: the operation device is formed as rotation member directly acting on the engaging member and the engaging position of the rotation member is secured by a spring.