X-ray tube head with improved x-ray shielding and electrical insulation
First Claim
1. In a dental x-ray tube head comprising a housing having an x-ray tube mounted therein, the improvement comprising:
- an inner shield encasing the x-ray tube and having an aperture through which the primary beam projects, with an open end for connecting wires to the x-ray tube;
an outer shield located within the housing and which fits over the inner shield in such a way as to cover the open end, with clearance for wires connected to the x-ray tube; and
wherein both the inner shield and the outer shield are formed of a mixture of polypropylene and barium sulfate.
4 Assignments
0 Petitions
Accused Products
Abstract
A dental x-ray tube head having a housing with an x-ray tube mounted in it, with improved shielding for preventing stray radiation from emanating outside of the path of the primary x-ray beam. The shielding includes an inner hollow element encasing the x-ray tube and having an aperture through which the primary beam projects, with an open end for connecting wires to the x-ray tube. The shielding further includes an outer hollow element which fits over the inner element in such a way as to cover the open end, with clearance for the wires connected to the tube. Both the inner element and the outer element are comprised of a mixture of polypropylene and barium sulfate. The combination of the inner element and the outer element completely surrounds the x-ray tube with the barium sulfate impregnated material, eliminating the use of lead within the tube head, and thereby providing excellent electrical insulation characteristics besides the x-ray attenuation.
54 Citations
3 Claims
-
1. In a dental x-ray tube head comprising a housing having an x-ray tube mounted therein, the improvement comprising:
-
an inner shield encasing the x-ray tube and having an aperture through which the primary beam projects, with an open end for connecting wires to the x-ray tube;
an outer shield located within the housing and which fits over the inner shield in such a way as to cover the open end, with clearance for wires connected to the x-ray tube; and
wherein both the inner shield and the outer shield are formed of a mixture of polypropylene and barium sulfate.
-
-
2. A dental x-ray tube head comprising:
-
a housing;
an outer shield mounted within the housing;
an inner shield mounted within the outer shield and having an aperture, with an open end, which is covered by the outer shield when mounted; and
an x-ray tube mounted in the inner shield;
wherein both the inner shield and the outer shield are formed of a mixture of polypropylene and barium sulfate.
-
-
3. A dental x-ray machine comprising:
-
a tube head connected to a wall unit by means of an articulated arm, said tube head including a housing;
an x-ray tube mounted in the housing;
an inner shield encasing the x-ray tube and having an aperture through which the primary beam projects, with an open end for connecting wires to the x-ray tube; and
an outer shield which fits over the inner shield in such a way as to cover the open end, with clearance for wires connected to the x-ray tube, and which fits loosely within the housing;
wherein both the inner shield and the outer shield are formed of a mixture of polypropylene and barium sulfate.
-
Specification
-
- Resources
-
Current AssigneeMidmark Corporation
-
Original AssigneeProgeny Incorporated (McDonough Medical Products Corp.)
-
InventorsKantor, Arkady, Griser, John
-
Primary Examiner(s)Dunn, Drew A.
-
Assistant Examiner(s)THOMAS, COURTNEY D
-
Application NumberUS10/116,930Time in Patent Office585 DaysField of Search378/203, 378/119, 378/121, 378/167, 378/168, 378/169, 378/170, 378/193, 378/197, 378/189, 378/190, 378/191, 378/196US Class Current378/203CPC Class CodesA61B 6/4488 Means for cooling A61B6/045...A61B 6/51 for dentistryH05G 1/04 Mounting the X-ray tube wit...
