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US 4,048,509 AGranted
Gamma-irradiation treatment apparatus
AssigneeSulzer Brothers Limited
InventorAdolf Sieber
Life of this patent
Estimating the term…
Abstract
The radiation source mounting frame is raised and lowered by means of an elevator comprised of a block and tackle and a servo-motor having an output connected to a movable pulley block of the block and tackle. The elevator allows the mounting frame to be lowered at a rapid rate when necessary. The supply line for the pressure medium is also disposed near the end of the piston stroke so that the line can be throttled before the piston reaches the end of its stroke. This allows the final descent of the mounting frame to be retarded.
Claims4
In an apparatus for treating goods with gamma radiation, the combination of
- a frame;
- at least one gamma radiation source mounted in said frame for selectively irradiating the goods;
- an elevator for moving said frame between a screened non-irradiating position and an irradiating position of said source with respect to the goods to be treated, said elevator including a block and tackle having a fixedly mounted pulley block, a movably mounted pulley block, and at least one run connected to said frame and disposed over said pulley blocks, and
- a servomotor including a cylinder and a piston slidably mounted in said cylinder and having a rod directly connected to said movably mounted pulley block for moving said latter pulley block relative to said fixedly mounted block whereby a small movement of said piston causes a corresponding movement of said movable pulley block and a greater movement of said run and said frame.
1 more element
Dependencies are inferred from the claim text.