초록 ▼

A manually-operated portable lift which may telescopically raise its mast or post so as to raise a lifting platform above the lift\s initial height. The lift may be folded up to a compact and easily-moved configuration for ease of transport and storage. The lift includes a base with built-in outrigg

A manually-operated portable lift which may telescopically raise its mast or post so as to raise a lifting platform above the lift\s initial height. The lift may be folded up to a compact and easily-moved configuration for ease of transport and storage. The lift includes a base with built-in outriggers which can be easily snapped out to fixed extended positions and returned to their storage positions. The outrigger is automatically latched in either such position but not between them. The base portion forward of the post can be manually unlatched and folded up parallel to the post. The platform and its arms have provision for manually mounting the arms of the platform in a low lifting position, a high lifting position, and a compact storage position wherein the arms are adjacent the platform. An extension mast is provided in either a storage position adjacent the main mast or as an extension of that mast. A manual winch is provided with dual handles－one long and one short－for greater or lesser mechanical advantage and slower or faster operation.

대표청구항 ▼

In a portable lift, for being positioned on a working surface or floor, comprising: a base unit having contacting means for contacting the working surface or floor; a post assembly mounted on said base unit and having a front and back side; a platform unit mounted to move up and down the front side

In a portable lift, for being positioned on a working surface or floor, comprising: a base unit having contacting means for contacting the working surface or floor; a post assembly mounted on said base unit and having a front and back side; a platform unit mounted to move up and down the front side of said post assembly; a winch mounted to said base and post assembly combination at the back side of said post assembly and including a winch cable which is coupled to move said platform unit; said base including extension rails which project in front of said post assembly; the improvement of: having said extension rails pivotably secured to the rest of said base at a position just in front of said post assembly, so as to be pivotable upward from an operational horizontally extended position just above the working surface or floor to a vertical storage position wherein they are generally parallel to the post assembly; means for releasably securing the extension rails in said operational position and alternatively in said storage position; and a wheel mounted on each of said pivotable extension rails, so as to pivotably move downward a short distance from a storage position above and out of contact with the working surface or floor to an operational position in which said wheel contacts the operational position in which said wheel contacts the working surface or floor and aids in supporting said base on the working surface or floor as said rail is pivoted upward from its operational position to its storage position.