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US 4,365,343 AGranted
Counterweighted X-ray tube
AssigneeXRE Corporation
InventorsJohn K. Grady, David B. Rice, Paul G. Rice
Life of this patent
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Abstract
X-ray apparatus comprises a U-shaped support having two hollow, horizontal arms. On the end of one arm is mounted an X-ray tube and on the other an X-radiation receptor both guided for movement on a radiation axis. A counterweight within one hollow, horizontal arm is guided for movement parallel to the X-ray tube, transversely of the arm. To counterbalance the X-ray tube a lever attached to the tube has sliding pivots at a fulcrum and the counterweight allowing the lever arm to change its length without changing the leverage ratio.
Claims8
Radiological apparatus comprising:
- a support;
- and
- radiation source means and radiation receptor means at spaced positions on the support for examination of a subject at a location therebetween, the source and receptor means having a common radiation axis extending through the subject location, and each means being mounted on the support to move along the radiation axis;
- wherein the support includes
- an arm extending to one radiation means toward the radiation axis;
- means on the arm guiding the radiation means along the radiation axis;
- fulcrum means on the arm;
- a lever pivoted on the fulcrum means and pivotally attached at one end to the radiation means;
- and
- a counterweight guided on the arm and engaging the other end of the lever to counterbalance the radiation means.
7 more elements
Dependencies are inferred from the claim text.