Solid material comminution or disintegration – Apparatus – With temperature modification of material
Reexamination Certificate
2006-05-23
2006-05-23
Rosenbaum, Mark (Department: 3725)
Solid material comminution or disintegration
Apparatus
With temperature modification of material
C241S207000, C241S216000, C241S286000, C241S290000
Reexamination Certificate
active
07048214
ABSTRACT:
It has been said that the wheel is the greatest invention of all time; when horses or oxen pulled wagons, dirt roads or no roads sufficed, but the wheels of modern transportation require paved roads for cars and trucks, concrete air strips for airplanes, ballast for railroads, concrete for dams, buildings, and many other things. Rock is the material that answers all these needs, but rock must be crushed to usable sizes. Big boulders or quarried rock are crushed by primary stage jaw or very large gyratory crushers that reduces the rock to sizes that second stage crushers can accept, and if the rock needs to be very small a third stage is used. Cone crushers are the crushers of choice for second and often for third stage crushing which is the type crusher of this patent application.
REFERENCES:
patent: 3118623 (1964-01-01), Johnson
patent: 3207449 (1965-09-01), Johnson
patent: 3337143 (1967-08-01), Johnson
patent: 3759453 (1973-09-01), Johnson
patent: 4192472 (1980-03-01), Johnson
patent: 4351490 (1982-09-01), Johnson
patent: 4454994 (1984-06-01), Johnson et al.
patent: 4571112 (1986-02-01), Johnson et al.
Johnson Bruce Gordon
Johnson Louis Wein
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