Plastic article or earthenware shaping or treating: apparatus – Control means responsive to or actuated by means sensing or... – Molding pressure control means responsive to pressure at...
Reexamination Certificate
2006-02-28
2006-02-28
Heitbrink, Tim (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
Control means responsive to or actuated by means sensing or...
Molding pressure control means responsive to pressure at...
C425S405200, C425S451700
Reexamination Certificate
active
07004742
ABSTRACT:
A linear drive for an injection molding machine includes a housing defining a sealed interior space containing a gas volume. The housing has two housing portions constructed for telescopic movement within one another. A spindle drive is accommodated in the housing and operated by the electric motor. The spindle drive includes a spindle shaft, which is axially securely fixed to one of the housing portions, and a spindle nut, which is arranged on the spindle shaft and axially securely fixed to the other one of the housing portions. Acting on the spindle drive is an energy accumulator which is constructed for discharge in a first operating cycle which is energy-intensive and for recharging in a second operating cycle which is opposite to the first operating cycle and requires little energy.
REFERENCES:
patent: 4601653 (1986-07-01), Inaba
patent: 5912020 (1999-06-01), Grunitz
patent: 5980235 (1999-11-01), Eppich et al.
patent: 6796782 (2004-09-01), Bauer
patent: 6802195 (2004-10-01), Quint
patent: 2000 141434 (2000-05-01), None
patent: WO 02/085600 (2002-10-01), None
Demag Ergotech GmbH
Feiereisen Henry M.
Heitbrink Tim
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