Solid material comminution or disintegration – Apparatus – Cooperating comminuting surfaces
Reexamination Certificate
2011-08-02
2011-08-02
Francis, Faye (Department: 3725)
Solid material comminution or disintegration
Apparatus
Cooperating comminuting surfaces
C241S207000
Reexamination Certificate
active
07988082
ABSTRACT:
A gyratory crusher has a crushing head fixedly attached to an upper portion of a substantially vertical shaft, on which crushing head a first crushing shell is mounted, and a frame on which a second crushing shell is mounted. The second crushing shell defines, together with the first crushing shell, a crushing gap. The gyratory crusher has a space adapted to contain liquid. The space is defined by a piston, which is formed at least partly of the lower end of the shaft, a cylinder, which is formed at least partly in an eccentric assembly, and a bottom element. The space is adapted to form a cushion with the aid of the liquid, so that the cushion can serve as a thrust bearing transmitting vertical forces from the crushing head to the bottom element.
REFERENCES:
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patent: 3782647 (1974-01-01), Decker et al.
patent: 4016630 (1977-04-01), Bengtsson et al.
patent: 4060205 (1977-11-01), Pollak
patent: 4478373 (1984-10-01), Gieschen
patent: 7673821 (2010-03-01), Norrman et al.
patent: WO 99/22869 (1999-05-01), None
Bennstedt Niklas
Johansson Jan
Nilsson-Wulff Torbjörn
Norrman Percy
Drinker Biddle & Reath LLP
Francis Faye
Sandvik Intellectual Property AB
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