Land vehicles – Wheeled – Tiltable vehicles – stabilized by attendant or article
Patent
1997-02-06
1999-03-02
Butler, Douglas C.
Land vehicles
Wheeled
Tiltable vehicles, stabilized by attendant or article
16115, 190 18A, 190115, 280 47371, A45C 1322, B25G 104, B62B 112
Patent
active
058760482
ABSTRACT:
An extensible draw bar device comprises a pair of outer pipes, a pair of middle pipes disposed in the corresponding outer pipes respectively, a pair of longitudinal inner pipes disposed in the corresponding middles pipes respectively, and a pair of press rods disposed in the corresponding inner pipes respectively. A transverse crossbar has two ends to receive two hollow plug seats respectively. The hollow plug seats receive two upper ends of two press rods respectively. The hollow plug seats are inserted in two upper ends of the two inner pipes respectively. An upper connecting seat has two hollow arms to receive two upper ends of the two outer pipes respectively. A lower connecting seat crosses the lower ends of the two outer pipes respectively. The upper connecting seat and the lower connecting seat connect a suitcase. Two wheel are disposed at the lower end of the lower connecting seat respectively.
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patent: 5458020 (1995-10-01), Wang
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patent: 5653319 (1997-08-01), Wang
patent: 5694663 (1997-12-01), Tserng
patent: 5704725 (1998-01-01), Horing
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