John Stewart Merrill

US Patent:

43479359, Sep 7, 1982

Filed:

May 16, 1979

Appl. No.:

6/039527

Inventors:

John T. Merrill - Berkeley CA

Assignee:

The United States of America as represented by the United States
Department of Energy - Washington DC

International Classification:

B07C 5342

US Classification:

209 32

Abstract:

An improved method of sorting biological cells in a conventional cell sorter apparatus includes generating a fluid jet containing cells to be sorted, measuring the distance between the centers of adjacent droplets in a zone thereof defined at the point where the fluid jet separates into descrete droplets, setting the distance between the center of a droplet in said separation zone and the position along said fluid jet at which the cell is optically sensed for specific characteristics to be an integral multiple of said center-to-center distance, and disabling a charger from electrically charging a specific droplet if a cell is detected by the optical sensor in a position wherein it will be in the neck area between droplets during droplet formation rather than within a predetermined distance from the droplet center.

US Patent:

44897448, Dec 25, 1984

Filed:

Sep 27, 1982

Appl. No.:

6/425142

Inventors:

John T. Merrill - Pleasant Hill CA

Assignee:

The United States of America as represented by the United States
Department of Energy - Washington DC

International Classification:

F16K 3132

US Classification:

137202

Abstract:

A liquid blocking check valve useful particularly in a pneumatic system utilizing a pressurized liquid fill chamber. The valve includes a floatable ball disposed within a housing defining a chamber. The housing is provided with an inlet aperture disposed in the top of said chamber, and an outlet aperture disposed in the bottom of said chamber in an offset relation to said inlet aperture and in communication with a cutaway side wall section of said housing.