Title:
FLEXIBLE EXTENSION PIPE FOR VACUUM CLEANER
Document Type and Number:
Japanese Patent JP3812013
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent falling off of a pipe by excess loosening in a pipe assembly whose inner pipe fastening force is variable by moving a fastening pipe screwed on the outer periphery of an outer pipe, equipping a dent part on one of the outer periphery face of the outer pipe or the inner periphery face on the fastening pipe and a protruding part to move in the dent part on the other.
SOLUTION: On assembling a flexible extension pipe, when an inner pipe 14 is inserted into an outer pipe 11 and a fastening pipe 15 is turned into the fastening direction, the fastening pipe 15 and a fastening ring 17 are advanced by screwing a male screw part 12 of the outer pipe 11 with a female screw part 16 of the fastening pipe 15 in the arrow mark 20 direction. As the fastening pipe 15 moves forward, an open part 21a of a dent part 21 of the fastening pipe 15 approaches a protruding part 22 of the outer pipe 11 and the protruding part 22 goes into the dent part 21 through the open part 21a. When the fastening pipe 15 is further rotated, the protruding part 22 overpasses the dent part 21 and then the protruding part 22 goes into the dent part 21 equipped in the vicinity to become rotatable within a range where the dent part 21 is equipped. Thus falling off of the inner pipe 14 from the outer pipe 11 can be prevented.
Inventors:
Yasunori Tsuzaki
Masahiro Kaji
Masahiro Kaji
Application Number:
JP29350096A
Publication Date:
August 23, 2006
Filing Date:
November 06, 1996
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
A47L9/24; (IPC1-7): A47L9/24
Domestic Patent References:
| JP58148394U | ||||
| JP62139458U | ||||
| JP63042365U |
Attorney, Agent or Firm:
Fumio Iwahashi
Hiroki Naito
Daisuke Nagano
Hiroki Naito
Daisuke Nagano