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US 4,373,679 AGranted
Impact type crusher
AssigneeKobukura Iron Works Co., Ltd.
InventorsYoshihiko Kawano, Hirosi Adachi, Masakazu Watanuki, Takashi Ueno
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AssigneeKobukura Iron Works Co., Ltd.
InventorsYoshihiko Kawano, Hirosi Adachi, Masakazu Watanuki, Takashi Ueno
Estimating the term…
A crusher of the type having a vertical rotary shaft which has a horizontal rotor secured thereto at its upper end and is rotatively mounted within the rotor frame, and mounted on the rotor is a hollow rotary cylinder with an open top end and a closed bottom, the cylinder having its peripheral wall formed with a number of raw material ejection slots so as to eject therethrough by centrifugal force the raw material to be crushed fed into it, and the rotor is further provided with a number of striking members outside the hollow rotary cylinder, preferably respectively pivoted to the rotor, for the purpose of striking the raw material ejected out of the raw material ejection slots of the hollow rotary cylinder, during the course of the flight thereof through the space around the rotary cylinder, whereby the raw material is crushed by the striking members.
A crusher comprising a frame having a substantially closed hollow cylindrical form with a raw material supply orifice being formed in its upper wall, a vertical rotary shaft rotatively supported within said frame below said raw material supply orifice, a horizontal motor mounted within said frame at the upper end of said rotary shaft for rotation in a rotational direction, a hollow rotary cylinder having a peripheral wall mounted within said frame to the upper surface of said rotor centrally thereof, said hollow rotary cylinder having an outer peripheral surface spaced from the inner cylindrical surface of said frame, being opened at its upper end below said raw material supply orifice and having a bottom closing its bottom end, said peripheral wall of said hollow rotary cylinder having at least one slot for ejecting therethrough by centrifugal force into an ejection space raw material fed onto said bottom, and at least one main striking member mounted to said rotor outside said hollow rotary cylinder, spaced from said outer peripheral wall of said hollow rotary cylinder to define therebetween the cylindrical raw material ejection space, the radial width of said ejection space being much greater than the thickness of said peripheral wall and having a striking surface facing towards said rotational direction of said rotor such that said raw material ejected through said slot impinges upon said striking surface during its movement through said raw material ejection space.
A crusher comprising a frame having a substantially closed hollow cylindrical form with a raw material supply orifice being formed in its upper wall, a vertical rotary shaft rotatably supported within said frame below said raw material supply orifice, a horizontal rotor mounted within said frame at the upper end of said rotary shaft for rotation in a rotational direction, a hollow rotary cylinder mounted within said frame to the upper surface of said rotor centrally thereof, said hollow rotary cylinder having an outer peripheral wall spaced from the inner cylindrical surface of said frame to define therebetween a cylindrical raw material ejection space, said hollow rotary cylinder being opened at its upper end below said raw material supply orifice and having a bottom for closing its bottom end, said peripheral wall of said hollow rotary cylinder having at least one slot for ejecting therethrough by centrifugal force into said ejection space raw material fed onto said bottom, at least one main striking member mounted to said rotor outside said hollow rotary cylinder and having a striking surface facing toward said rotational direction of said rotor such that said raw material ejected through said slot impinges upon said striking surface during its movement through said raw material ejection space, a raw material repulsion fence arranged within said frame surrounding said rotor and spaced from the loci of rotation of said main striking member and the inner wall of said frame, and means for maintaining the space between the inner wall of said frame and said raw material repulsion fence under a negative pressure, said negative pressure maintaining means comprising duct means for connecting said space to said raw material supply orifice through said frame.
Dependencies are inferred from the claim text.