Abstract: A collapsible hand truck for supporting large and heavy objects such as entrance way doors. The hand truck being able to adjust to varying load center of gravities, thereby allowing a single individual to handle extremely heavy loads. A tiltable main frame which can rotate about a fulcrum point allowing even the heaviest loads to be shifted from a vertical to a horizontal plane with minimal effort by the individual. The main frame is supported by a pair of struts and the length of the frame is adjustable to compensate for doors of various lengths and center of gravities. A front strut having a pair of loading wheels and a rear strut having auxiliary caster wheels for maneuverability. The struts being rotative to each other.

Abstract: A yieldable line assembly and in line shock absorber is discolored for use primarily in marine applications, including for example mooring lines, sail and canvas ties, etc. The shock absorber includes a tubular housing containing one or more coiled compression springs to which line segments are connected, and which are arranged to absorb shock by being resiliently compressed.