Inventor
HAGEMAN MARTIN P
US20 patents
Patents
20 patentsUS4759678AJul 26, 1988
Vehicle restraint utilizing a fluid cylinder
KELLEY CO INC77 citations96
US4674941AJun 23, 1987
Vehicle restraint using a parallelogram linkage
KELLEY CO INC70 citations96
US4784567ANov 15, 1988
Vehicle restraint utilizing a fluid cylinder
KELLEY CO INC61 citations95
US5416941AMay 23, 1995
Dockboard having an improved return-to-dock-level mechanism
KELLEY CO INC24 citations92
US5392481AFeb 28, 1995
Return-to-dock-level mechanism for a dockboard having a hydraulic holddown
KELLEY CO INC21 citations92
US5205010AApr 27, 1993
Return-to-dock level mechanism for a hydraulic dockboard
KELLEY CO INC37 citations92
US4955923ASep 11, 1990
Hydraulically operated dockboard
KELLEY CO INC32 citations92
US4922568AMay 8, 1990
Holddown mechanism for a dockboard
KELLEY CO INC28 citations92
US4665579AMay 19, 1987
Counterbalancing mechanism for an edge-of-dock dockboard
KELLEY CO INC67 citations92
US6585211B1Jul 1, 2003
Wheel chocking device and method for using the same
KELLEY CO INC33 citations91
US6478525B2Nov 12, 2002
Wheel chocking device and method for using the same
KELLEY CO INC30 citations91
US6276496B1Aug 21, 2001
Wheel chocking device
KELLEY CO INC34 citations91
US6250432B1Jun 26, 2001
Wheel chocking device and method for using the same
KELLEY CO INC37 citations91
US5927928AJul 27, 1999
Wheel chocking device
KELLEY CO INC24 citations91
US4767254AAug 30, 1988
Vehicle restraint having an upwardly biased restraining member
KELLEY CO INC47 citations91
US4619008AOct 28, 1986
Dockboard construction
KELLEY CO INC38 citations91
US5522107AJun 4, 1996
Retaining arrangement for an inflatable member in a dock leveler
KELLEY CO INC21 citations90
US5600859AFeb 11, 1997
Dock leveler in which the ramp is raised and lowered using an inflatable member and method of use
KELLEY CO INC27 citations88
US5274867AJan 4, 1994
Hydraulically operated edge-of-dock leveler
KELLEY CO INC17 citations74
US5188015AFeb 23, 1993
Automatically sequenced hydraulic cylinder mechanism
KELLEY CO INC7 citations74