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US 4,302,023 AGranted
Dolly with vertically adjustable shelf
OwnerLloyd W. Kieszinventor
Life of this patent
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OwnerLloyd W. Kieszinventor
Estimating the term…
A dolly is disclosed having a vertically adjustable shelf attachable to independent vertical side rails resting on a surface, the rails constituting legs for the support of the shelf, two of which are wheeled, the shelf having a pair of laterally and oppositely attached wheels which can be lifted with the shelf from the bottom to the top of the legs to render the device stationary and permit a weight to be supported on the shelf. When the shelf is lowered on the rails to its lowermost position, all four wheels contact the surface for movement of the dolly from one location to another. In either mode of use, a weight is supportable on the shelf. In another form of the dolly, a storable handle bar can be attached near the top of the legs to permit use as a hand truck when the device is in the mode of use which allows movement of a supported weight. With the first form, movement along a surface is contemplated, while in the second form, movement up and down stairways is also possible.
A device for support of an article during transport or storage on a surface at an adjustable height above the surface comprising a plurality of rail means, a substantially horizontal shelf means slidable vertically on said rail means for support of the article, the shelf means including clamp means for adjustment of the height of the article in storage thereof, the shelf means further including shelf wheel means for engaging the surface for transport of the article when the shelf is clamped by said clamp means to a lowermost position on said rail means, said rail means comprising two pair of vertical rails, each of the first pair of which includes a rail wheel means contacting the surface, each of the second pair of which is in close proximity to said shelf wheel means when said shelf means is in said lowermost position so as to permit lifting of the second pair of rails from said surface, each of said rails of at least one of said pair being independently movable with respect to said shelf means in the vertical direction.
The device of clamp 3 wherein said clamp means comprises a threaded pin turnable by a knob into a compatibly threaded recess in each sleeve for frictional clamping engagement of the sleeve on each corresponding vertical rail.
A device for the support of an article during transport or storage on a surface at an adjustable height above the surface comprising a plurality of shelf support means, a substantially horizontal shelf means slidable vertically on said shelf support means for support of the article, handle means for manually sliding said shelf means vertically on said shelf support means, the shelf means including clamp means for adjustment of the height of the article in storage thereof, the shelf means further including shelf wheel means for engaging the surface for transport of the article when the shelf means is clamped by said clamp means to a lowermost position on said shelf support means, said shelf support means comprising two pair of vertically elongated members extending above the shelf means when the shelf means is in the lowermost position, each of the first pair of which includes member wheel means contacting said surface, said shelf support means supporting said shelf means and said article on said surface when said shelf means is in a raised position whereby said shelf wheel means are out of engagement with the surface and when said shelf means is in the lowermost position on said shelf support means whereby said device can be moved relative to said surface by movement of said member wheel means and said shelf wheel means.
Dependencies are inferred from the claim text.