Material or article handling – Vehicle attached auxiliary carriers
Reexamination Certificate
2008-10-02
2009-10-20
Brahan, Thomas J. (Department: 3654)
Material or article handling
Vehicle attached auxiliary carriers
C212S180000, C212S270000, C414S542000
Reexamination Certificate
active
07604450
ABSTRACT:
A portable hoist for attachment to a trailer hitch drawbar includes a mast that comprises a plurality of mast segments assembled end to end in axial alignment at ground level and then rotated on a pivot bar inserted in the hitch drawbar from its horizontal assembly position to its vertical operational position. Similarly, to disassemble the hoist it is lowered from its vertical position to its horizontal position within easy reach of the user standing on the ground. The hoist boom is also installed with the mast horizontal in assembly position with the boom coaxial with the mast. The boom is then rotated to its operational position orthogonal to the mast when the mast is vertical. A friction bearing is installed on the mast so the mast above the friction bearing can rotate about the mast longitudinal axis. A winch is installed on the mast typically between the friction bearing and the boom so the winch rotates with the boom.
REFERENCES:
patent: 2487305 (1949-11-01), Bridegroom
patent: 3836029 (1974-09-01), Ruedebusch
patent: 4186938 (1980-02-01), Youngblood
patent: 4746263 (1988-05-01), Cook
patent: 4806063 (1989-02-01), York
patent: 4969625 (1990-11-01), Singer et al.
patent: 5211526 (1993-05-01), Robinette
patent: 5662451 (1997-09-01), Muzzi et al.
patent: 5690260 (1997-11-01), Aikins et al.
patent: 5752799 (1998-05-01), Carey et al.
patent: 5788095 (1998-08-01), Watson
patent: 5853278 (1998-12-01), Frantz
patent: 5857824 (1999-01-01), De Aquiar
patent: 6007289 (1999-12-01), Kruse et al.
patent: 6042328 (2000-03-01), McVaugh
patent: 6089431 (2000-07-01), Heyworth
patent: 6386410 (2002-05-01), Van Dusen et al.
patent: 6821075 (2004-11-01), van der Horn
patent: 6830423 (2004-12-01), Williams et al.
patent: 6866285 (2005-03-01), Stamp
patent: 6899238 (2005-05-01), Austin et al.
patent: 2006/0120842 (2006-06-01), Thompson
patent: 2009/0120985 (2009-05-01), Sautter et al.
Brahan Thomas J.
Tingey David L.
LandOfFree
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