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Class Information
Number: 14/71.7
Name: Bridges > Gangway, ramp, or dock leveler > Attached > With lift means > Hydraulic powered
Description: Bridging structure wherein the repositioning means includes a fluid actuated motor as a prime mover.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8464384 Stop and lock for a vertically storing dock leveler Jun. 18, 2013
8191194 Stop and lock for a vertically storing dock leveler Jun. 5, 2012
7900307 Boarding bridge Mar. 8, 2011
7670096 Compound truck leveler Mar. 2, 2010
7380305 Loading dock system with biodegradable fluid Jun. 3, 2008
RE39404 Movable loading bridge having an inflatable flexible body Nov. 21, 2006
7039978 Flexible over the wing passenger loading bridge May. 9, 2006
6931687 Flexible over the wing passenger loading bridge Aug. 23, 2005
6923140 Boat access stairway Aug. 2, 2005
6820296 Flexible over the wing passenger loading bridge Nov. 23, 2004
6789286 Flexible over the wing passenger loading bridge Sep. 14, 2004
6698052 Hydraulically assisted restraint device Mar. 2, 2004
6526615 Flexible over the wing passenger loading bridge Mar. 4, 2003
6516487 Dockleveler with a barrier Feb. 11, 2003
6502267 Conveyor crossover Jan. 7, 2003
6499169 Recycle control system for dock levelers Dec. 31, 2002
6405397 Loading dock with segmented wide lip Jun. 18, 2002
6386819 Self-powered elevationally adjustable foldable ramp for draft vehicles May. 14, 2002
6368043 Low-profile truck leveler Apr. 9, 2002
6360393 Method for converting a dock leveler to a dock leveler operated with an inflatable member and a dock leveler produced by the same Mar. 26, 2002
6327733 Mechanically actuated dock leveler with hydraulic assist Dec. 11, 2001
6311352 Self-unlatching dock leveler lip with dampened descent Nov. 6, 2001
6179545 Flip-over ramp Jan. 30, 2001
6085375 Lip guiding mechanism for dock levelers Jul. 11, 2000
6065172 Hydraulic control circuit May. 23, 2000
5996156 Dock leveler raised by deflating an inflatable member Dec. 7, 1999
5881414 Loading dock with adjustable bumpers Mar. 16, 1999
5851099 Adjustable cargo platform assembly Dec. 22, 1998
5816767 Transport locking system for movable-deck vehicle Oct. 6, 1998
5802650 Dock leveler having an inflatable member Sep. 8, 1998
5802651 Dock leveler with a movable ramp and an inflatable member Sep. 8, 1998
5791003 Method and apparatus for variably elevating a passenger boarding bridge platform Aug. 11, 1998
5762460 Truck leveler Jun. 9, 1998
5678984 Detachable folding trailer ramp Oct. 21, 1997
5651656 Rail transportable ramps for loading semi-trailers on trains Jul. 29, 1997
5651155 Support mechanism for a dockleveler lift bag Jul. 29, 1997
5647081 Manual hydraulic dock board hold down arrangement Jul. 15, 1997
5621938 Edge-of-dock leveler and method of making Apr. 22, 1997
5600859 Dock leveler in which the ramp is raised and lowered using an inflatable member and method of use Feb. 11, 1997
5560733 Gas pre-charged mass counterbalancing Oct. 1, 1996
5551113 Manual hydraulic dock board hold down arrangement Sep. 3, 1996
5544381 Dock leveler hydraulic circuit Aug. 13, 1996
5526545 Automatic return to dock mechanism Jun. 18, 1996
5522108 Dock leveler having a ramp movable to a raised position by inflation of an inflatable member, with a filler for occupying volume within the inflatable member Jun. 4, 1996
5522107 Retaining arrangement for an inflatable member in a dock leveler Jun. 4, 1996
5511267 Dock leveler hydraulic circuit Apr. 30, 1996
5500968 Dock leveler incorporating an inflatable bag Mar. 26, 1996
5490754 Hydraulic upper deck ramp for a trailer Feb. 13, 1996
5481774 Support mechanism for a dockleveler lift bag Jan. 9, 1996
5460460 Scissors lift dock leveler Oct. 24, 1995

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