Potomac Applied Mechanics, Inc.

Other

Stephen T Spevak

Frederick Arlen Leavitt

A system for combusting fuel comprising an apparatus that receives fuel that is characterized as comprising interstitial spacing and wherein oxidants pass through the interstitial spacing of the fuel to sustain a combustion reaction at the interface of a reaction chamber while the byproducts of combustion pass into the reaction chamber.

Grateless, back drafted and back fed pellet stove

A ladder leveler includes a frame unit that is adjustable in two degrees of freedom and has a wide range of adjustment. The rungs of a ladder being leveled are supported, and brakes are located between the rung supporting element and the remainder of the frame unit. The brakes can be located between the rung supporting element and crossbars on the frame unit and/or between the crossbars and stanchions of that frame unit. At least two rungs of the ladder are supported. If three rungs are supported, one of the rungs will be supported from beneath that rung, and the stanchions are telescoping.

Ladder leveler

An article supporting assembly is provided that allows quick retrieval of articles mounted thereby, yet makes maximum utilization of the space occupied by the assembly for supporting articles. A center structure, at least two cover plates, and article supporting structures formed on at least one of the center structure and the cover plates are provided. At least two spanners are provided with first hinges for connecting one cover plate to one spanner, and the other cover plate to the other spanner so that the cover plates are pivotal with respect to the spanners, and second hinges for connecting the spanners to the center structure so that the spanners are pivotal with respect to the center structure. The center structure is mounted on a base and/or top of a housing so that it is pivotal with respect to the housing. The spanners, cover plates, and center structure may take a wide variety of forms.

Article supporting assembly

The invention relates to an article supporting assembly that is useful as a toolbox, for shelving, for article display purposes, and a wide variety of other purposes. The basic assembly includes a center plate, at least two spanners, each having first and second opposite edges, at least two cover plates, and article supporting structures formed on the center plate and the cover plates. Each of the spanners is hinged to the center plate generally along the first spanner edges, the cover plates are hinged together, and each cover plate is hinged to a spanner generally along the second edge of the spanner, so that the cover plates are pivotal from a first position generally parallel to the center plate (spaced the width of the spanner) to a second position generally perpendicular to the center plate. A casing preferably surrounds the center plate, with a handle formed on the casing. Two sets of spanners and cover plates may be provided, one on each side of the center plate, and the center plate may be mounted on the casing for rotational movement.

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Winchester, VA, United States of America

Stephen T Spevak