Linda K Cragle, Paul C Harris, Shih Yun Lee, Ker Kong Tung, Morton A Vodian: Immunoassays and kits for use therein which include low affinity antibodies for reducing the hook effect. Beckman Instruments, W H May, A Grant, R S Friedman, June 17, 1986: US04595661 (70 worldwide citation)

An immunoassay for assaying an antigenic substance (Ag) in a fluid. The immunoassay is the type which comprises contacting the fluid with at least one first entity selected from a group consisting of an antibody (Ab) to the Ag, a soluble, labeled antibody (L-Ab.sub.a) to the Ag, and an antibody (Ab. ...

Edgar H Frank: Knob locking and drag device. Beckman Instruments, R J Steinmeyer, F L Mehlhoff, W H May, May 15, 1979: US04154125 (63 worldwide citation)

A device for use with variable electrical components such as potentiometers to provide not only an independent means adjacent the control knob to lock the knob in a fixed position, but also to provide variable amounts of drag on the knob to enhance more precise and accurate control of the knob. The ...

David L Goodale, Nick Darden: Rotary pinch valve. Beckman Instruments, W H May, Gary T Hampson, Arnold Grant, September 22, 1987: US04694861 (57 worldwide citation)

A random access rotary pinch valve for controlling fluid flow through a plurality of fluid conduits. The valve is adapted to receive and retain the fluid conduits and includes, for each of the conduits, a toggle mechanism comprising a piston and a toggle. The piston and toggle can be latched to pinc ...

Kenzo Ishimaru, Lee Gropper: Chylomicron rotor. Beckman Instruments, R J Steinmeyer, F L Mehlhoff, W H May, March 6, 1979: US04142670 (57 worldwide citation)

A centrifuge rotor assembly having a resilient liner with at least two separate chambers. Fluid communication between the separate chambers is automatically controlled in response to centrifugation operation of the rotor. When the rotor is stationary, the liner assumes a first position within the ro ...

Wilbur I Kaye: Marking and authenticating documents with liquid crystal materials. Beckman Instruments, W H May, P R Harder, S R Markl, April 30, 1985: US04514085 (54 worldwide citation)

Method and apparatus for authenticating documents such as government notes and currency, stock certificates, and the like by marking the document with an encapsulated dyed liquid crystal material and examining the document for unique optical characteristics of the mark. Reading apparatus for the doc ...

Robert H Giebeler, Christopher W Parkes: Centrifuge overspeed protection and imbalance detection system. Beckman Instruments, W H May, P R Harder, October 13, 1987: US04700117 (46 worldwide citation)

A centrifuge overspeed protection and imbalance detection system is structured to provide a method for detecting rotor imbalance and rotor overspeed. The system has a single transducer to provide real-time data necessary to detect rotor imbalance and control motor speed.

David G Ogle, John T Taylor: High pressure sample injector valve. Beckman Instruments, R J Steinmeyer, F L Mehlhoff, W H May, April 24, 1984: US04444066 (43 worldwide citation)

A high pressure valve for control of the injection of a sample into an analyzer system such as an amino acid analyzer with liquid column chromatography. The valve is designed in such a manner that no rinse solution that is used to cleanse the system after the injection of a particular sample will en ...

Richard G Hatch, Gary Tepermeister: Chromatographic cartridge column system. Beckman Instruments, W H May, P R Harder, L D Rish, January 21, 1986: US04565632 (39 worldwide citation)

End caps that are press fitted to the ends of an analytical column tube and to a precolumn tube are abutted to form a fluid flow path. The end caps include projections around the fluid flow path to form a void between the opposing faces of the end caps. A gasket seal is retained within the void to p ...

William E Cook, Morton A Vodian, Otto Haunold: Multiple object capturing and processing device. Beckman Instruments, W H May, J E Vanderburgh, R S Frieman, January 22, 1985: US04495150 (38 worldwide citation)

A device for handling and washing beads. The device is attachable to a test tube rack and includes a frame, a containing slide, and a capture slide. By manipulating the slides in various combinations of positions the beads may be added to, removed from, or separately washed apart from test tubes in ...

Robert S Carey: Ultracentrifuge rotor. Beckman Instruments, R J Steinmeyer, F L Mehlhoff, W H May, August 28, 1984: US04468269 (37 worldwide citation)

An ultracentrifuge rotor comprising a body portion formed as a bowl with a central open chamber defined by a thin, cylindrical wall extending from a supporting base and a plurality of nested rings of filament windings surrounding the cylindrical wall for strengthening and stiffening same. The nested ...