Abstract:
The pipetting method is directed to mounting and ejecting a disposable pipette tip. The pipetting system has one or more tip mounting shafts with an upper locking section and a lower sealing section. The upper locking section has outwardly extending lobes spaced around the mounting shaft and located above a stop member. The lower sealing section on the tip mounting shaft is located below the stop. As the mounting shaft is inserted into the collar of the disposable pipette, the collar distorts out of round and engages the lobes on the upper locking section of the tip mounting shaft. Contemporaneously, the lower sealing section of the mounting shaft seals against the barrel of the disposable pipette tip.
Abstract:
A hand-held electronic pipettor includes menu driven software for controlling the information displayed on the user interface display, for inputting information to program the pipettor and for controlling the operation of the pipettor.
Abstract:
A liquid sample or liquid reagent reservoir kit employs a reusable reservoir base and disposable liners made of a clear transparent plastic material. Graduation marks are located on the sidewall surface of the basin in the reusable reservoir base, and are calibrated to measure liquid volumes in a disposable liner placed within the reusable reservoir base. The transparency of the clear disposable liner allows the liquid volume graduation marks on the sidewall of the basin in the reusable base to be observed through the disposable liner. The disposable liners are configured so that the liners can also be used as a cover. The geometry of the disposable liners facilitates tight nesting of stacked liners to facilitate shipping as well as storage on the laboratory bench top.
Abstract:
A method of sealing the open mouths of an array of test tubes comprises providing a plurality of plugs with upwardly facing recesses, and a flexible carrier sheet having the same array of mutually spaced downwardly projecting pegs inserted into and frictionally retained within the recesses of respective ones of the plugs. Sealing is effected by aligning the plugs with the open mouths of the test tubes, pressing the carrier sheet towards the test tubes to seat the plugs in the open tube mouths, and peeling the carrier sheet away from the test tubes to extract the pegs from the plug recesses while allowing the plugs to remain seated in the tube mouths.
Abstract:
A sealing mat for sealing the open mouths of an array of test tubes. The mat includes a flexible carrier sheet having an array of mutually spaced pegs projecting downwardly therefrom and a plurality of plugs. The plugs are externally configured and dimensioned to be inserted in and to seal the open mouths of the test tubes. Each of the plugs has an upwardly facing recess internally configured and dimensioned to receive and coact in frictional engagement with a respective one of the pegs to thereby releasably secure the plugs to the carrier sheet. The carrier sheet is separable from the thus inserted plugs by flexure to extract the pegs from the recesses.
Abstract:
A tube rack comprises a base having an array of vertical openings extending therebetween, the openings being configured and dimensioned to receive a plurality of tubes, with the upper ends of the tubes being accessible at the top surface. The base includes base sidewalls that each include a co-axial trunnion extending from the associated sidewall. The tube rack also includes a rotatable and removable cover having a front wall, a back wall and first and second sidewalls, wherein the first and second side walls each include an associated notch open on a bottom surface thereof to allow the cover to be lowered onto the base, such that each of the notches rests on its associated trunnion and may be (i) vertically raised from its closed position on the trunnions and (ii) rotated about the trunnions from its closed position to allow access to the array of openings, wherein each of the notches includes a trunnion travel surface and a ledge surface and the ledge surface engages its associated trunnion to limit rotation of the cover beyond its full cover position. Each of the openings comprises a plurality of support pads positioned within the opening to vertically support the tube within its associated opening. Each of the pads includes a chamfered concave surface that supportably engages the tube, while providing flow paths through which air may pass through the openings adjacent to the tube.
Abstract:
The pipetting method is directed to mounting and ejecting a disposable pipette tip. The pipetting system has one or more tip mounting shafts with an upper locking section and a lower sealing section. The upper locking section has outwardly extending lobes spaced around the mounting shaft and located above a stop member. The lower sealing section on the tip mounting shaft is located below the stop. As the mounting shaft is inserted into the collar of the disposable pipette, the collar distorts out of round and engages the lobes on the upper locking section of the tip mounting shaft. Contemporaneously, the lower sealing section of the mounting shaft seals against the barrel of the disposable pipette tip.
Abstract:
A hand-held, multi-channel pipettor has an electronically controlled motor to reposition pipette tips for different center to center spacing. Each repositionable tip fitting assembly has a cam following pin that is driven by cam tracks in a motor driven roller drum. Stationary ports for the multiple aspiration cylinders are strategically placed to simplify management of flexible tubes leading to the repositionable pipette tip fitting assemblies. The pipettor has a user interface that can be operated conveniently by one hand to reposition pipette tips. It has a pipette tip ejection mechanism with a sinusoidal stripper bar.