Abstract: A railroad trailer chassis comprising two or more road axles, two or more rail axles operable to be moved between first and second positions, and a work unit. The railroad trailer chassis is operable to be driven or towed in a road mode when the two or rail axles are in their respective first positions. The railroad trailer chassis is operable to be driven or towed in a rail mode when the two or more rail axles are in their respective second positions. The work unit is operable to perform one or more railroad maintenance or operation functions when driven in the rail mode.

Abstract: A spinal traction/decompression device suitable for home or clinical treatment of lumbar and cervical spine pathology. The traction apparatus has a substantially flat upper body support that is moveable with respect to a fixed base. The upper body support is adapted to receive the upper torso of an individual leaning forward in a prone position while kneeling on a knee cushion. A pelvis/hip restraining portion holds the individual's lower torso in position with respect to the fixed base when the upper body support is moved. Lumbar traction may be induced by a user positioning their upper torso on the upper body support and moving it forward or backward with respect to the fixed base. The upper body support may also be divided into two independently moveable sections such that cervical traction can be induced in a neck region of a user. The traction force is preferably supplied by the individual pushing or pulling the upper body support forward with their arms.