Abstract: A personal positioning creeper (PPC) for assisting mechanics, technicians and factory workers who need access to various angles and heights on a vehicle, aircraft, factory equipment, etc. The PPC allows the operator to simultaneously maneuver from lying supine near the ground, to moving upward and rotating into a full sitting position without having to dismount the PPC. The PPC comprises: a three member frame system (base, seat, and backrest frame connected together with eight (8) bell cranks and four (4) linkage assemblies), all under the control of a hydraulic system. The hydraulic system comprises: 1) a hydraulic pump with an ergonomically designed pump actuator handle and a release valve; and, 2) a hydraulic cylinder connected to the hydraulic pump, and to the linkage assemblies to rotate the bell cranks. The resistance to the pumping action felt by the operator remains constant regardless of the height of the seat.

Abstract: A personal positioning creeper (PPC) for assisting mechanics, technicians and factory workers who need access to various angles and heights on a vehicle, aircraft, factory equipment, etc. The PPC allows the operator to simultaneously maneuver from lying supine near the ground, to moving upward and rotating into a full sitting position without having to dismount the PPC. The PPC comprises: a three member frame system (base, seat, and backrest frame connected together with eight (8) bell cranks and four (4) linkage assemblies), all under the control of a hydraulic system. The hydraulic system comprises: 1) a hydraulic pump with an ergonomically designed pump actuator handle and a release valve; and, 2) a hydraulic cylinder connected to the hydraulic pump, and to the linkage assemblies to rotate the bell cranks. The resistance to the pumping action felt by the operator remains constant regardless of the height of the seat.

Abstract: A disclosed amphibious vehicle includes a trailer portion, a hull including a bottom, and at least one wheel. The wheel moves between a first wheel position where at least some of the wheel is below the hull bottom, and a second wheel position above the hull bottom. The wheel supports the trailer portion when in the first wheel position and the hull bottom supports the trailer when the wheel is in the second wheel position. One example includes a tongue fitted with a coupler for towing the trailer portion that moves between a first tongue position and a second tongue position further from the hull than the first tongue position.

Abstract: A cleaning apparatus (10) for a radiation source assembly (35) in a fluid treatment system is described. The cleaning apparatus comprise cleaning chamber (20) and a second chamber (25, 30) independent of the cleaning chamber which defines a fluid (typically water) buffer layer to obviate or mitigate cleaning fluid from the cleaning chamber leaking into the fluid being treated. The fluid treatment system is particularly useful for us in clean water applications in which ultraviolet radiation is used to treat the water while having the advantages of in situ cleaning of the radiation source when it becomes fouled.