Drummond Scientific Company

Other

Becton Dickinson and Company Limited

Diametrics Medical Limited

James W Kenney

Timothy P Steele

Kathleen A Eischen

Russ Dettmann

An apparatus for storing blood plasma separated after fractionation from whole blood within a wrapped hematocrit (capillary) tube. The apparatus is large enough to receive and display a standard laboratory identification label. The apparatus stores plasma from a hematocrit tube that does not include thixotropic gel. The apparatus housing has an intended upright orientation, a central axis, a top end, a bottom end, and side walls defining an internal cavity. A wall with an upper surface and a lower surface divides the internal cavity into an upper cavity and a lower cavity. A reservoir is formed in the upper cavity. A removable cap seals the reservoir. The cap is movable between open and closed positions. A channel within the lower cavity extends axially from the bottom of the housing to the wall. The channel receives and supports the wrapped hematocrit tube while plasma is expelled therefrom and into the reservoir.

Plasma storage apparatus

A device for dispensing a rolled web of material having a plurality of laterally-extending, longitudinally-spaced lines of perforation. The device has a frame for supporting the rolled web such that lengths of the web are removed from the roll in a direction of advancement as the roll rotates. An infeed roller pair is rotatably mounted on the frame. The infeed roller pair provides a nip therebetween for receiving the web from the roll and for moving it forward in the direction of advancement. A pair of delivery rollers is rotatably mounted on the frame in spaced relation with the first pair of rollers. The second pair of rollers receives the web from the first roller pair and provides a nip therebetween for moving the web in the direction of advancement. Motor means drives the infeed roller pair and the delivery roller pair. Brake means is affixed to the infeed roller pair for slowing the rotational speed thereof relative to the delivery roller pair whereby sufficient tension is created in a length of web located between said roller pairs to tear the web across one of the lines of perforation. Actuation means selectively actuates the brake means during advancement of the web by the delivery rollers.

Automated dispenser

A diaphragm pump with a bi-component diaphragm pump housing. The housing has a top component and a bottom component that connect along first and second complimenting connection interfaces and form an interior pump chamber, an exterior pressure port, an exterior vacuum port, and fluid communication channels connecting the exterior ports with the interior chamber. The first and second connection interfaces are oriented transverse to one another. The components of the pump are self-locking and can be assembled without the use of tools.

Split-housing pipette pump

A pipette gun and holster apparatus having a remote source of positive and negative air pressure. The holster supports the pipette gun above a work table with the pipette connector oriented generally, vertically downwardly. The holster has a base which may be fastened to a vertical wall. A mounting bracket is fixed to and extends transverse to the base. The bracket has a bottomless socket constructed and arranged to receive and removably hold the pipette gun by inserting the pipette connector into the socket. A switch deactivates the remote air pressure source when the pipette gun is parked in the holster and energizes the remote air pressure source when the pipette gun is removed from the holster. A method of metering fluid using a pipette gun and holster apparatus. The holster is removable fastened to a vertical surface next to or proximate a horizontal work table top. The pipette gun is parked in the holster above the work table with the pipette connector and pipette oriented generally, vertically downwardly out of contact with the table top. The pipette gun is removed from the holster and fluid is metered with the gun. The remote air pressure source is automatically inactivated when the pipette gun is parked in the holster and automatically activated when the pipette gun is removed from the holster.

Pipette gun and holster assembly

The present invention relates to a disposable, preselected-volume, capillary pipette device for picking up and transferring a selected volume of a liquid sample such as blood.

Disposable preselected-volume, capillary pipette device having an integrally-formed bulbous end and method of taking blood samples using the device

A pipet gun for drawing liquids into and dispensing liquids from a pipet which includes a variable flow valve assembly. The valve assembly includes a valve which is capable of accommodating a plurality of flow rates, and which is progressively adjustable during pipetting between a first air flow rate and a second air flow rate which is in excess of the first flow rate and which is non-progressively adjustable during pipetting to a third air flow rate which is substantially greater than the second air flow rate. The valve assembly further includes a threshold detector in the form of a spring detent, which provides an indication to the operator that the pipet gun is operating at the increased fluid rate, i.e., the &ldquo;express mode&rdquo; of operation.

Apparatus for drawing liquids into and expelling liquids from a pipet at variable flow rates

A user-replaceable grip for use on the handle of a pipette gun. The grip has a length, width, thickness, attachment surface, and a gripping surface. The grip is releasably fastened to the handle of the pipette gun by fasteners without interfering with the trigger. A plurality of grips having different identifying indicia on the gripping surface are provided so that the pipette gun can be identified to ownership, function, status, or the like. Alternatively, a plurality of grips are provided having the same length and width but having a different thickness so that the shape and size of the pipette gun handle can be customized to the hand size of different technicians using the pipette gun. Since the grips are removably fastened to the pipette gun handle, the grips can be easily interchanged when the identity of the pipette gun changes or a different technician uses the pipette gun.

User-replaceable pipette gun grip

A presealed integral hematocrit test assembly includes a holder, a bore molded into the holder, and a blood sample tube mounted on the holder adapted to receive a sample of blood by capillary action, whereby the blood sample tube is filled with blood from its inlet end by capillary action, and the test assembly is centrifuged into a column having a red corpuscles portion, white corpuscles portion, and a plasma portion. The method of using the presealed integral hematocrit test assembly includes the steps of measuring the length of the red cells column portion and measuring the total length of the blood column, and dividing the length of the red cells column portion by the total length of the blood column to make the hematocrit determination.

Presealed integral hematocrit test assembly and method

A disposable one-time use, inexpensive, capillary-action safety micro-pipet for obtaining a sample of blood or other liquid comprises a transparent glass tube which is capable of drawing blood or other liquid into the tube by capillary action, and a resilient sheet, with an adhesive layer adhering the resilient sheet in one or more layers around the outside surface of the tube for covering the outside surface of the tube and protecting a user against being cut by any jagged edges of a broken tube. The method of the invention comprises making a safety pipet by taking an elongated glass tube, taking a resilient sheet having an inner surface coated with a layer of adhesive, wrapping the resilient sheet around the outer surface of the tube and around inner layers of the resilient sheet, adhering the resilient sheet to the outer surface of the tube and to the inner layers of the sheet, to provide a wrapped safety glass tube in which the wrapping strengthens the tube against breaking and also protects the user against being cut by any jagged edges of a broken tube and from being infected by the contents of the tube which may be contaminated.

Process for making a safety pipet tube

A disposable, vented capillary draw device is described that is also capable of use for the syringe pressurized dispensing of liquid benignly drawn. The system includes a vented capillary collection tube for drawing liquid samples by capillary rise in a bubble-free manner. A reversible, positive vent shut-off is provided to help contain the drawn material in the capillary. A reciprocating, loose fitting, syringe plunger arrangement is also provided attached to and operable in the capillary tube. Initial axial displacement of the plunger in the capillary toward the open end is used to initially operate the vent seal or positive vent shut-off device to close the vent and, upon further advancement of the plunger, the plunger forces the liquid material back out of the draw tube.

Capillary syringe

A pipet gun assembly with a handle and a barrel extending from the handle and a pipet stand, wherein a pipet tube connected to the barrel is supported upright by the base of the handle and the stand connected to the barrel so that the pipet tube does not touch anything and can remain sterile. The pipet tube is supported with its admitting-emitting end below the level of its connecting end that is connected to the pipet gun so that any liquid in the pipet tube does not flow back through the tube and into the pipet gun.

Pipet gun assembly

A valve for use in a pipette gun for selectively providing different ranges of flow rates through a pipette cooperating with the pipette gun. The valve has a predetermined number of discrete settings, each of which provides a range of fluid flow rates between zero and a different maximum flow rate. The operator controls the flow rate by depressing the gun trigger a selected distance. To change the flow rate setting, the operator simply rotates the gun trigger to a desired setting. The present valve also eliminates the 'piston effect' of prior art valve elements by isolating the pipette chamber while the valve element operably slides in and out of engagement with a port thereby connecting the pipette with a fluid source either under pressure or at a vacuum.

Adjustable valve for pipette gun

A pipette gun in which the pump mechanism for creating suction to draw liquids into the pipette and for creating pressure for forcing the liquid out of the pipette includes a generally oval flexible diaphragm.

Pipet filling and discharge device

Safety pipet

A pipetter for picking up, holding and then ejecting a pipet tube, without touching the pipet tube with the hands, which includes a housing, a collet which comprises fingers mounted at the forward end of the housing, and an outer or holding sleeve which closes the fingers when the outer sleeve is positioned forwardly on the housing and which allows the fingers to open when the outer sleeve is retracted on the housing, and an ejector sleeve which has a spring that pushes it against the fingers to open them and eject the tube. The outer sleeve has a holding spring mounted between the housing and the outer sleeve, and the outer sleeve holding spring urges the outer sleeve forwardly to push against the outer surface of the fingers to close them and hold them closed, when the ejector sleeve is pushed into a retracted position in the housing by a pipet tube. When the operator wishes to eject the tube from the pipetter after collecting and discharging its blood sample, he retracts the outer sleeve against the force of the outer sleeve spring, and the ejector spring house moves the ejector sleeve forwardly between the pipetter fingers to open the fingers and to eject the pipet tube.

Growing community of inventors

Broomall, PA, United States of America

James W Kenney