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US 4,045,918 AGranted
Abrading and polishing tumbler apparatus
AssigneeNatural Science Industries, Ltd.
InventorRobert Nathan Freedman
Life of this patent
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AssigneeNatural Science Industries, Ltd.
InventorRobert Nathan Freedman
Estimating the term…
An abrading and polishing tumbler apparatus in which the tumbler barrel is concurrently rotated and rocked includes an internally ribbed barrel having a separable closure cap at one end with a peripheral friction face and a closed opposite end face provided with a medial longitudinal projection having a pair of transversely spaced first and second longitudinal bores, respectively, concentric with and eccentric to the barrel central axis. A pivot pin is fitted in a selected bore. A support frame carries an upwardly directed raised open topped saddle bearing and a friction wheel is rotatably mounted to the frame below and longitudinally spaced from the saddle bearing. The cap friction surface rests on the friction wheel and the pivot pin rests on a saddle bearing. The friction wheel is rotated by a frame mounted motor to only rotate the barrel when the pivot pin engages the concentric bore and rocks and rotates the barrel when the pivot pin engages the eccentric bore.
A tumbling apparatus comprising a tumbling barrel, bearing means for supporting a first end section of said barrel for free rotation of said barrel about a longitudinally extending axis and for free rocking of said barrel about a transversely extending axis and engaging said barrel first end section at selectively transferable alternative points respectively concentric and eccentric to the central longitudinal axis of said barrel, said axes of rotation and rocking extending substantially through said bearing means, and drive means for simultaneously rotating and rocking said tumbling barrel about said longitudinally extending and transverse axes, respectively, when said bearing means engages said first end section at said eccentric point.
A tumbling apparatus comprising a support frame, an upwardly directed saddle bearing located on said support frame, an electric motor mounted on said support frame, a friction drive wheel coupled to said drive motor and supported for rotation about an axis below and parallel to the axis of said saddle bearing, a longitudinally extending tumbler barrel including a body portion having a closed end face and open at its opposite end and a closure cap separably engaging said body portion open end and having an outer peripheral friction drive surface engaging said friction drive wheel and a pivot pin extending longitudinally from said barrel body portion end face and selectively transferable between points thereon alternatively eccentric to and concentric with the central longitudinal axis of said barrel and resting on said saddle bearing.
Dependencies are inferred from the claim text.