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US 4,603,747 AGranted
Apparatus for removing internal tiles from chimneys
OwnerJames M. Goldeninventor
Life of this patent
Estimating the term…
Abstract
Apparatus is provided for removing the interior tile lining from brick chimneys. The apparatus includes an assembly that is lowered into the chimney, the assembly comprising a reversible electric motor mounted within a frame, and a weighted impact member driven by the motor in a horizontal circular path. An impact-absorbing clutch protects the motor from mechanical shock, and keeps the weight of the impact member from pulling downwardly on the rotor of the motor.
Claims8
A heavy duty apparatus for removing the interior tiles from chimneys by rotary impaction comprising:
- (a) an electric motor capable of reversing directions of rotation,
- (b) a protective frame upon which said motor is mounted,
- (c) a drive shaft extending downwardly from said motor to a lowermost extremity,
- (d) impact-absorbing clutch means associated with the lowermost extremity of said drive shaft,
- (e) an extension shaft axially aligned with said drive shaft, having an upper extremity engaged by said clutch means, and a lowermost extremity,
- (f) a universal joint associated with the lowermost extremity of said extension shaft,
- (g) a pivoted shaft attached to said universal joint and extending downwardly to a lowermost extremity,
- (h) weighted impact means associated with the lowermost extremity of said pivoted shaft and adapted to travel in a circular path extending beyond said frame,
- (i) means for vertically lowering and raising said frame, and
- (j) electrical control means for starting, stopping and reversing said motor.
7 more elements
Dependencies are inferred from the claim text.