초록 ▼

This invention pertains to a portable utility jack for use on an inclined roof or a flat roof. The utility jack is constructed from a mainframe which has at least one support frame which is adjustable to several positions to accommodate, for example, various roof pitches and which provides, in conju

This invention pertains to a portable utility jack for use on an inclined roof or a flat roof. The utility jack is constructed from a mainframe which has at least one support frame which is adjustable to several positions to accommodate, for example, various roof pitches and which provides, in conjunction with a platform tray, for the level support of various construction or paint tools, materials and supplies and/or for the fixed level support of a paint tray. The utility jack is also capable of storing and transporting the various construction or paint tools, materials and supplies. The utility jack is constructed to be collapsable and portable. In one application thereof, the utility jack has a large area, non-skid, elastomeric element on one side thereof for enhanced traction and added safety for use on an inclined roof. In another application, the utility jack has four caster wheels attached thereto for use on a flat roof.

대표청구항 ▼

A utility jack for an inclined roof comprising a substantially rectangular mainframe having upstanding walls and a lateral partition therewithin so as to form two major cavities therein, an upper cavity and a lower cavity, a vertical partition within said upper cavity subdividing said upper cavity i

A utility jack for an inclined roof comprising a substantially rectangular mainframe having upstanding walls and a lateral partition therewithin so as to form two major cavities therein, an upper cavity and a lower cavity, a vertical partition within said upper cavity subdividing said upper cavity into two chambers, a first chamber and a second chamber, said first chamber being larger than said second chamber, at least one adjustable support frame movably attached to said mainframe and having a first reversible tray associated therewith, said at least one adjustable support frame extending within the upper part of said first chamber, a second reversible tray being associated with said second chamber, at least one pair of fixed brackets wherein each fixed bracket has a fixed guiding means attached thereto, one pair of rotatably movable brackets wherein each movable bracket has an elongated aperture therein, each of said one pair of rotatably movable brackets being attached to an opposite outer side of said at least one adjustable support frame, each of said one pair of fixed brackets being attached to an opposite sidewall of said mainframe within said first chamber such that it is adjacent a respective one of said one pair of rotatably movable brackets and such that a respective one of said fixed guiding means passes through the elongated aperture of a respective one of said at least one pair of rotatably movable brackets, one pair of fastening means for securing said at least one adjustable support frame to said fixed guiding means such that said at least one adjustable support frame is in an open position and provides a level support for said first reversible tray, and a large area, non-skid, elastomeric element being positioned within said lower cavity such that a portion thereof extends externally of said lower cavity of said mainframe.