Other

National Research Development Corporation

John E Gibbons

Roger A Bunce

Gary H Thorpe

Larry J Kricka

Thomas P Whitehead

Matthew R Walker

Louise J Keen

A liquid transfer device of disposable one-time use form to conduct a biochemical diagnostic or other assay comprises two liquid flow channels (10,110,210; 20,120,220) leading from a respective pair of channel ends to a common site (30,130,230) and operable to deliver liquid to this site in sequentially timed manner following simultaneous application of such liquid to the channel ends. Typically respectively different reagents (11,111,211; 21,121,221) are incorporated in the two channels, and a third reagent (31,131,231) at the common site, whereby a sample to be assayed in respect of a particular content can be applied to the site, immobilized by the third reagent, subsequently subjected to one channel reagent to detect any of the content of interest, and finally subjected to the other channel reagent to exhibit for the user any detected content.

Liquid transfer devices

A recording apparatus has a holder for a plurality of reaction vessels including a support plate (11) having an array of holes (15) therein for receiving an array of reaction vessels (16), a housing (10) for receiving the holder and being sealed to prevent entry of stray light, an openable cover (24, 249) for the housing, a film back (12) for holding a photographic film adjacent the underside of the plate (11), and a removable shutter (13) for interposition between the film and the support plate.

Dispensing device and recording apparatus

Pipette means having aspirating and expelling means and a substantially cylindrical tube connected to a pipette tip for fluid flow therebetween; the expelling means being arranged to apply pressure to the outer surface of the cylindrical tube, the diameter and wall thickness of which being chosen so that said tube is compressed elastically and substantially uniformly and circumferentially to reduce the internal volume thereof, tending to expel any liquid from the pipette tip; and the aspirating means being arranged to relieve pressure from the outer surface of said tube, allowing the tube to expand substantially circumferentially and uniformly so that liquid may thereby be drawn into the pipette tip.

Pipette means

Growing community of inventors

Hall Green, United Kingdom

John E Gibbons