Abrasive tool making process – material – or composition – Impregnating or coating an abrasive tool
Patent
1977-07-22
1978-11-14
Peters, Jimmy C.
Abrasive tool making process, material, or composition
Impregnating or coating an abrasive tool
51170PT, B24B 2300, B24B 5506
Patent
active
041249569
ABSTRACT:
A combined cutting and vacuum apparatus comprising a cutting device having a vacuum shroud and a remote housing having a vacuum motor disposed therein. A flexible drive shaft powers the cutting device from the motor and a flexible vacuum tube produces a vacuum at the shroud. The motor includes a rotary drive shaft having a first end portion on which an impeller is secured and to which the flexible drive shaft is connected. A vacuum chamber is provided in the housing over the impeller and the rotary shaft extends therethrough. The vacuum chamber has an inlet port laterally offset from the rotary shaft. A removable filter bag is mounted within the housing between the port and the vacuum tube.
In one embodiment the cutting device includes a handpiece having a rotary bur. The shroud is a tubular member having a flared open mouth. The handpiece is releasably secured within the shroud, with the abrading bur extending from the interior of the shroud to slightly outside the flared mouth. A coupling communicates with the interior of the free end of the shroud and extends at an angle thereto to connect the vacuum tube to the shroud so that the vacuum produced by the motor effects the withdrawl of the material abraded by the bur into the shroud through the vacuum tube and into the filter for entrapment therein.
In another embodiment the cutting device includes an elongated saw blade having an arcuate cutting edge. The blade is releasably secured to the cutting device and arranged for oscillatory motion through a predetermined length stroke. The stroke length is readily adjustable. A vacuum shroud is provided and includes a slot through which the arcuate cutting edge of the blade extends. The vacuum tube coupling communicates with the interior of the slot in the shroud and is readily disconnectible from the cutting device. The shroud includes adjustable means for establishing the depth of the cut produced by the oscillatory blade.
REFERENCES:
patent: 994430 (1911-06-01), Tunks
patent: 3126021 (1964-03-01), May
patent: 3217407 (1965-11-01), Azar
patent: 3975821 (1976-08-01), Flicker
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