All position tractor

Cog wheel railway

Conveyor having self-propelled carriers and track with pivotal r

Conveyor having self-propelled carriers with a first motor for h

Conveyor system with conveyor carriage running on rails

Driving device for rail vehicles having friction and cog drives

Electric motor driven traversing balancer hoist

Electric overhead trolley conveyor

Friction and rack and pinion locomotive

Guidance system with a truck guided on a rail

Monorail access system for making a boat handicapped accesible

Motorized portable system and method for aiding persons in ascen

Motorized portable system for aiding persons in ascending or des

Motorized system and method for aiding physically-impaired perso

Multi-position travelling carriage with flexible track

Overhead rail conveyor system with improved traction having elas

Pallet conveyor system

Rack and pinion and adhesion drive locomotive

Rack and pinion drive trolley with slip-ring drive wheel

Rack-rail assembly for a mining machine