Patent Number: 050158643
Section: claims

1. A manually propelled radiation shield comprising a frame, caster wheel means for supporting the frame for universal movement on the ground, a flexible sheet of material capable of preventing the transmission of radiation carried by the frame, said frame including a generally annular thrust means constructed and arranged to be engaged by the body of a user to propel the frame over the ground in accordance with walking movement of the user. 2. The apparatus of claim 1, wherein said thrust means includes a movable member moved between an operative position wherein said user exerts a force against said movable member to propel said frame and a release position wherein said user enters and exits said annular thrust means. 3. The apparatus of claim 2, wherein said movable member is mounted for pivotal movement between a generally horizontal operative position and a generally vertical release position. 4. The apparatus of claim 3, wherein said movable member is mounted about a horizontal axis. 5. The apparatus of claim 1, wherein said annular thrust means includes a resilient pad disposed to be engaged by the waist of the user. 6. The apparatus of claim 5, wherein said annular thrust means includes a pair of overlapping resilient pads, and releasable fastening means for removably connecting the pads together. 7. The apparatus of claim 1, wherein said caster wheel means comprises a plurality of casters. 8. The apparatus of claim 1, wherein said caster wheel means comprises two groups of a plurality of casters, each group disposed at a side of said frame and arranged in a generally triangular pattern. 9. The apparatus of claim 8, wherein a first caster of each group is disposed in generally vertical alignment with the forward extremity of said frame. 10. The apparatus of claim 1, and including a head shield removably attached to the upper end of said frame and disposed to shield the head of the operator. 11. A mobile radiation shield, comprising a frame including a pair of generally vertical frame members, each frame member including an upper forwardly extending curved shoulder section, wheel means for supporting the frame for universal movement on the ground, a flexible apron including a radiation resistant material supported by said shoulder sections of said frame members, and annular thrust means interconnecting said vertical frame members and located beneath said shoulder sections, said thrust means being constructed and arranged to be engaged by the body of a user to thereby propel manually said frame over the ground in accordance with walking movement of said user. 12. The apparatus of claim 11, and including means for adjusting the height of each vertical frame member. 13. The apparatus of claim 12, wherein each vertical frame member includes a pair of telescopic sections, and locking means to lock the telescopic sections together. 14. The apparatus of claim 11, and including a generally curved frame section connecting the lower portions of said vertical frame members and disposed beneath said annular thrust means. 15. The apparatus of claim 14, and including a second apron containing a radiation resistant material and connected to said curved frame section. 16. The apparatus of claim 11, and including a head piece including a lead glass window, a bib attached to the lower end of said head piece and extending laterally of said window, and attaching means for removably attaching said bib to said shoulder sections of said frame members. 17. The apparatus of claim 11, and including a pair of shoulder flaps containing a radiation resistant material, flexible connecting means for connecting said flaps together, and attaching means for attaching said connecting means to the shoulder sections of said vertical frame members. 18. The apparatus of claim 16, wherein said attaching means comprises hook and loop fasteners. 19. The apparatus of claim 11, wherein said wheel means includes a plurality of casters associated with the lower end of each vertical frame member, a tubular brace connecting at least one of said casters to the respective vertical frame member and extending rearwardly of said vertical frame member, and weight means connected to said brace. 20. The apparatus of claim 19, wherein said brace is hollow and said weight means comprises a finely divided metal disposed within said hollow brace. 21. The apparatus of claim 19, wherein three casters are associated with each vertical frame member, a first of said three casters being vertically aligned with said vertical frame member, the second of said casters being disposed laterally outward of said vertical frame member and a third of said casters being disposed to the rear of said vertical frame member. 22. A mobile radiation shield, comprising a frame, wheel means for supporting the frame for universal movement on the ground, said frame including a thrust bar having an annular configuration and located between the upper and lower ends of said frame and disposed to be engaged by the body of a user to propel the frame over the ground in accordance with walking movement of the user, a flexible sheet of material capable of preventing the transmission of radiation carried by the frame and covering said annular thrust bar, said thrust bar having a rear section that is selectively removed from the annular configuration to provide a ga through which a user enters the frame, and means for securing said rear section in the annular configuration.