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US4303858: Device to be used in automatic gamma counters to move the samples into a measuring chamber


Filing Information

Inventor(s) Jan Ostrup ·
Assignee(s) Wallac Oy ·
Attorney/Agent(s) Fisher, Christen & Sabol ·
Primary Examiner Alfred E. Smith ·
Assistant Examiner Janice A. Howell ·
Application Number US6104762
Filing date 12/18/1979
Issue date 12/01/1981
Predicted expiration date 12/18/1999
U.S. Classifications 250/328  · 250/359  ·
International Classifications G01T 100  ·
Kind CodeA
International Classifications 250328;358 R;359;361 R ·
3 Claims, No Drawings


A device to be used in an automatic gamma counter to move sample holders (4) into a measuring chamber (6). The device comprises a slide (1) which moves the holders into the measuring chamber (6) and at the entering completely seals the chamber.

Independent Claims | See all claims (3)

  1. 1. In an automatic gamma counter for measuring radioactive samples contained in sample holders removably supported in elongated racks which are moved step-by-step in a longitudinally directional path past a measuring station comprising:a radiation shielded chamber disposed at said station on one side of said path, said chamber having an opening facing a sample holder positioned at said station through which sample holders are to be sequentially introduced into the chamber for measuring;a slide fabricated of radiation shielding material mounted at said station on the opposite side of said path and facing said opening for horizontal reciprocating movement perpendicular to said path between a retracted position on the side of the path opposite from said opening and a projected position in engagement with said opening;said slide having a configuration to engage with said opening in said projected position to provide a radiation shielded closure for said chamber; andtransferring and gripping means for removing a sample holder from a rack at said station when the slide is in said retracted position and for suspending the removed holder in said shielded chamber when in said projected position.

References Cited

U.S. Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
US3859528 BECKMAN INSTRUMENTS INC Luitwieler, Jr. et al. Jan 1975
US3946231 G. D. Searle & Co. Frank Mar 1976

Referenced By

Document NumberAssigneeInventorsIssue/Pub Date
US7873143 X-Ray Optical Systems, Inc. Daniel L. Dunham et al. Jan 2011
US5216243 Wallac Oy Markku Varjonen et al. Jun 1993
US5281394 ICN Biomedicals, Inc. John M. Holub Jan 1994

Patent Family

The current document is not in a family.