SCREW DRIVE VEHICLE

摘要

A screw drive vehicle 10 has a main housing 20 with forward and aft ends 22.24, and first and second lateral sides 26.28 A first support arm 72 rotatably suppor ts a first pontoon assembly 70a from the first lateral side of the main housing. A second suppo rt arm 72 rotatably supports a second pontoon assembly 70b from the second lateral side of the main housing. A reversible motor 50 in the housing simultaneously rotates the support arms from positions parallel to one another and the main housing to non-parallel positions. Each pontoon assembly includes a tubular housing 82 with exterior screw thread 84 supported for rotation between distal ends of the arm and a reversible pontoon drive motor 130 operably coupled with the tubular housing so as to rotate the housing and thread in a selected rotational direction.