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Class 73/864.17 - Plural


Subclass of Class 73 - Measuring and testing
Definition: Subject matter including more than one piston and cylinder
No. of patents: 94
Last issue date: 09/06/2011


1      
NumberTitleIssue Date
8011257Multichannel pipette
A multichannel pipette, including a grip part defining a longitudinal axis and including a piston-driving device movable axially thereon, a displacement part rotating about the axis and having cylinder and piston arrangements, and a connection device for detachably ...
09/06/2011
7536926Dispensing apparatus having means for loading pipette tips in a dispense head
A self contained dispensing head apparatus wherein a modified pipette tip box tray carrier is utilized to furnish pipette tips, carried in a standard pipette tip box, by a pipette tip box tray carrier to the head apparatus and wherein means are provided to engage th...
05/26/2009
7270789Pipettor head having standpipes open at their tops to a pressure/vacuum chamber and method
In a preferred embodiment, a pipettor head, including: a body; one or more solenoid valves disposed in the body; each one or more solenoid valves having an outlet at a lower end and an inlet at an upper end; each one or more solenoid valves having an outlet attached...
09/18/2007
7223370Device for fully automated solid phase extraction
Device for automatically implementing the SPE method, with a two-dimensional needle arrangement which is suitable for removing substances from different two-dimensional specimen vessel arrangements and dispensing them under pressure into a two-dimensional cartridge ...
05/29/2007
7189369Distribution apparatus and method for detaching distribution tip in distribution apparatus
In the distribution apparatus and the method for detaching distribution tips of the present invention, the detaching plate provided with openings being larger in diameter than outer diameter of the nozzle and smaller in diameter than outer diameter of the distributi...
03/13/2007
7159740Method and apparatus for parallel dispensing of defined volumes of solid particles
A sample preparation system provides an automated process that dispenses appropriate amounts of solid material into wells of a microtiter plate for mixing into a suspension. The system utilizes an array of hollow tubes that are lowered into a particle reservoir such...
01/09/2007
7105130Adjustable pipette
A pipette includes a housing defining a suction chamber. A piston is configured to move in the suction chamber. A first retainer mechanism includes a first threading configured to limit a motion of the piston in the suction chamber. A second retainer mechanism inclu...
09/12/2006
6978689Dispensing apparatus having means for loading pipette tips in a dispense head
A self contained dispensing head apparatus wherein a modified pipette tip box tray carrier is utilized to furnish pipette tips, carried in a standard pipette tip box, by a pipette tip box tray carrier to the head apparatus and wherein means are provided to engage th...
12/27/2005
6977062Automatic pipette identification
Mechanisms are provided for automatically removing tips from a pipette nozzle and/or for detecting the type of tip mounted to the nozzle. For detipping, mechanical energy is stored when the tip is mounted to the nozzle and is released when the tip is to be removed t...
12/20/2005
6973845Low insertion force tip/mandrel
A pipette assembly for automatic pipetting machines including a stepped mandrel and tip for providing a minimum contact seal between the pipette tip and mandrel. The mandrel includes a first cylindrical portion with a first exterior diameter and a second cylindrical...
12/13/2005
6953552Spotting device for fabricating microarrays of biological samples and spotting pin inserted therein
The present invention relates to a spotting device for fabricating microarrays of biological materials and a spotting pin inserted therein. More particularly, the present invention is directed to a spotting device, which comprises several pins and pin-guiding holder...
10/11/2005
6931948Multiple pipette and method of using the same
A multiple pipette (X) comprising a first pipette (1) and a second pipette (2), wherein the first pipette (1) allows a liquid stored in a liquid storing section (17a) to be delivered a plurality of times by a fixed amount each and ...
08/23/2005
6905657Methods and devices for storing and dispensing liquids
In a liquid handling system including a liquid handling substrate having a plurality of channels for conducting a liquid sample in said substrate, where the channels terminate in a plurality of exit ports in an outer surface of the substrate for transfer of a quanti...
06/14/2005
6869571Device for aspirating and dispensing liquid samples
A device (1) for aspirating and dispensing liquid samples having a pump (2), which comprises a cylindrical chamber (3), a piston (4) movable in this cylindrical chamber, and a piston drive (5) engaging on the piston. The device add...
03/22/2005
6846680Liquid handling system with automatically interchangeable cannula array
The present invention provides a liquid handling system capable of automated dispensing and reformatting operations by virtue of a quick-release cannula array mounting system that permits cannula arrays to be changed automatically by the system or manually by a user...
01/25/2005
6780648Method and system for selectively distributing luminescence material precursors
A method comprises positively displacing a first candidate luminescence material precursor from a dispenser to a first position of an array, displacing a second candidate luminescence material precursor from a dispenser mechanism to a second position of an array and...
08/24/2004
6659142Apparatus and method for preparing fluid mixtures
A system and method for preparing and dispensing fluid mixtures is provided. Fluid wells are positioned below a plurality of fluid dispensing devices, such as syringes configured to dispense fluid into the individual fluid wells. The fluid dispensing devi...
12/09/2003
6644364Article comprising a multi-channel dispensing head
A multi-channel fluid dispenser includes a reservoir (106) with multiple internal chambers (844) with ports (850) to fill each chamber (844), a multi-channel liquid dispensing head, a plurality of fluid-delivery conduits, and support and positioning eleme...
11/11/2003
6627160Multiple channel pipetting device
A multiple channel pipetting device and pipette shaft, in which each pipette shaft has a circumferential seal receptacle inside, at its upper end in which the circumferential plunger seal is positioned and in which the circumferential plunger seal, at lea...
09/30/2003
6627157Dual manifold system and method for fluid transfer
A dual-manifold assembly is provided for the rapid, parallel transfer of liquid reagents from a microtiter plate to a solid state microelectronic device having biological sensors integrated thereon. The assembly includes aspiration and dispense manifolds ...
09/30/2003
6607662Apparatus for purifying nucleic acids and proteins
The present invention provides an apparatus for purifying nucleic acids such as DNA and RNA or proteins such as enzymes and antibodies from microorganisms such as viruses and bacteria or animal and plant tissues, the apparatus being capable of fast proces...
08/19/2003
6589483Liquid dispenser
A liquid dispenser characterized by a dispensing head which is movable upward and downward as a whole and comprises a plurality of plungers supported by a plunger plate, drive means for moving the plunger plate upward and downward, a plurality of cylinder...
07/08/2003
6582664Multichannel pipette head
The invention provides multichannel pipette heads and autopipettors for loading, measuring, transporting and dispensing, particularly from one micro-plate to another. An exemplary multichannel pipette head comprises a pump housing, pistons, a drive plate,...
06/24/2003
6575209Proportioning head
A proportioning head comprising a head plate, a multiplicity of pipette tips in plastic in a matrix array the tip apertures of which are disposed below the head plate and which are mounted at top of the head plate wherein the upper apertures of the pipett...
06/10/2003
6569687Dual manifold system and method for fluid transfer
A dual-manifold assembly is provided for the rapid, parallel transfer of liquid reagents from a microtiter plate to a solid state microelectronic device having biological sensors integrated thereon. The assembly includes aspiration and dispense manifolds ...
05/27/2003
6544480Device and related method for dispensing small volumes of liquid
A device and related method for dispensing liquid. The device includes a housing configured to contain a plurality of liquid dispensing members containing a liquid and configured to contain a receiving member in a receiving position to receive the liquid ...
04/08/2003
6544479Piston seal for a pipettor
In a preferred embodiment, a small volume pipettor, including: a plurality of pistons; a plurality of liquid delivery needles; motive means to cause one of the pistons to move axially within one of the needles to cause a liquid to be selectively drawn int...
04/08/2003
6506611Metering head for parallel processing of a plurality of fluid samples
A freely traversable metering head with numerous metering devices, wherein the metering devices are each provided individually or block-by-block with an activating device, and wherein a controller traversable with the metering head is designed for the ind...
01/14/2003
6499363Tip for pipette and pipette with the same
A nozzle 33 is formed on a distal end side of a cylinder 3. The nozzle 33 has an intermediate portion 3b formed such that a tip 7 is freely attachable thereto and detachable therefrom. The intermediate portion 3b of the nozzle 33 is formed with an annular...
12/31/2002
6455006Apparatus for aspirating and discharging a sample quantity
It has been hard to suck the high viscosity sample by using the syringe and to stop the suction of the sample. A sample sucking-discharging device in the invention comprises an injector provided with a cylinder and a piston installed in the cylinder so as to ...
09/24/2002
6399024Multichannel pipette head
The invention provides multichannel pipette heads and autopipettors for loading, measuring, transporting and dispensing, particularly from one micro-plate to another. An exemplary multichannel pipette head comprises a pump housing, pistons, a drive plate,...
06/04/2002
6387330Method and apparatus for storing and dispensing reagents
A method and device for storing and dispensing specified subsets from a collection of tens, hundreds or thousands of different reagents to specified locations within microtitre trays or microarray substrates or the like. The reagents of interest are store...
05/14/2002
6374683Pipetter
A micropipetter a plurality of hollow needles to deliver fluid, the needles being anchored in a sample block; a needle guide assembly with a plurality of needle guide shafts and compression springs attached at one end to the sample block and at the other ...
04/23/2002
6358470Automatic distribution apparatus for inserting nozzles into tips
A distribution head 14 is provided with nozzles 17. A tip holder 5 is placed on a platform 53 which is supported on a rod 52 of a cylinder 51. The tip holder 5 holds a number of distribution tips 15 upright. The nozzles 17 are fitted to the top portion of...
03/19/2002
6338825Pipette tip having plural channels and a titration kit therefor
A pipette tip having at least two separate dispensing channels for dispensing liquid simultaneously into a corresponding number of micro titration wells or other container. The tip has a tubular body with one open end for mounting on a pipette. At the oth...
01/15/2002
6325114Pipetting station apparatus
A pipette station is described for use in the field of sample analysis. The pipette station increases the rate and ease with which a liquid may be manipulated into and out of sample carriers such as microwell plates. The pipette station includes shafts in...
12/04/2001
6258324Pipette dispensing block
A pipette dispensing block has an improved piston seal and lift plate engagement/disengagement means. In a pipette dispensing block where a piston is used to create a pressure differential to aspirate or extract and dispense or eject fluid material, the m...
07/10/2001
6250154Oil and gas metering and measuring device
A fluid metering and measuring device is provided and which is particularly adapted to regulate ratios of oil and gasoline in a mixture of oil and gasoline used, for example, in a two-stroke engine. The device has a filling chamber with a fluid inlet and ...
06/26/2001
6244119Multichannel pipette system and pipette tips therefor
The present invention relates generally to a multichannel pipetting system that can be used with a plurality of well plates used for medical, biological or biochemical research involving liquid materials. The system includes a multichannel pipettor and no...
06/12/2001
6235244Uniformly expandable multi-channel pipettor
A pipetting system having a plurality of tip fittings whose spacing can be simultaneously, quickly, and accurately adjusted so that the spacing between each adjacent tip fitting is substantially identical. The tip fittings are attached one to another by a...
05/22/2001
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