Patent ID: 8070021

Claim:
A viscous material container evacuator, comprising: a chamber to hold a container and a plunger axially and slidably accommodated within the chamber to express material from the container; at least one hinged enclosure that closes to define the chamber and to securely enclose the container; at least one hydraulically activated fastener that secures the enclosure around the container; a hydraulic motor operatively part of the fastener, wherein the hydraulic motor drives a threaded shaft into a threaded channel of a clamp block to foreshorten a spacing between a head of the threaded shaft and an opposing clamp block nub wall to drive lugs together on opposing hinged enclosures to secure the enclosures; a controller that controls the hydraulic motor to activate the fastener; and a relief cartridge controllably mounted with a hydraulic line to the motor to deliver a hydraulic drive pressure to the motor and comprising a bypass line around the motor and a pressure sensor to sense a pressure level of the hydraulic drive pressure and to divert hydraulic drive pressure from the motor when the pressure level is sensed.