Dispenser with filter device
First Claim
Patent Images
1. A fluid dispenser for a biological sample processing system, the fluid dispenser comprising:
- a barrel including a main body and a piston coupled to the main body, the main body including a sidewall and a bottom that at least partially define a reservoir chamber for holding fluid;
a valve positioned downstream of the reservoir chamber; and
a filter device upstream of the valve and including a protective cantilevered member and a vertically oriented filtering element having a plurality of through-holes with inlets positioned closer to a longitudinal axis of the filter device than an outer periphery of protective cantilevered member positioned above the plurality of through-holes, wherein the filtering element extends upwardly through at least a portion of the reservoir chamber when the barrel is in a vertical orientation to allow the fluid, which is in the reservoir chamber and located between the filtering element and the sidewall of the main body, to pass laterally through the filtering element and to flow towards the valve while the filtering element substantially blocks precipitates in the fluid having a threshold size.
1 Assignment
0 Petitions
Accused Products
Abstract
A biological processing system includes a platform assembly for holding slides and a dispenser assembly with dispensers. The dispensers are sequentially positionable over specimen-bearing slides to enable dispensing of substances onto specimens. The dispensers include a filter device for filtering a processing substance such that a substantially precipitate-free filtrate is applied to the specimens. The dispenser includes a filter device positioned at least partially in a reservoir chamber. The filter device includes anti-clogging features to maintain desired performance.
60 Citations
23 Claims
-
1. A fluid dispenser for a biological sample processing system, the fluid dispenser comprising:
-
a barrel including a main body and a piston coupled to the main body, the main body including a sidewall and a bottom that at least partially define a reservoir chamber for holding fluid; a valve positioned downstream of the reservoir chamber; and a filter device upstream of the valve and including a protective cantilevered member and a vertically oriented filtering element having a plurality of through-holes with inlets positioned closer to a longitudinal axis of the filter device than an outer periphery of protective cantilevered member positioned above the plurality of through-holes, wherein the filtering element extends upwardly through at least a portion of the reservoir chamber when the barrel is in a vertical orientation to allow the fluid, which is in the reservoir chamber and located between the filtering element and the sidewall of the main body, to pass laterally through the filtering element and to flow towards the valve while the filtering element substantially blocks precipitates in the fluid having a threshold size. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A biological processing system, comprising:
-
a platform assembly including a plurality of slide holders; and a dispenser assembly including a plurality of dispensers, the platform assembly and the dispenser assembly configured to cooperate to sequentially position the dispensers relative to specimen-bearing slides on the slide holders to enable dispensing of substances onto the specimen-bearing slides, wherein at least one of the dispensers includes a filter device for filtering a substance to deliver a substantially precipitate-free filtrate through a valve and onto one of the specimen-bearing slides, the filter device including a protective cantilevered member, and a vertically oriented sidewall including plurality of through-holes with inlets positioned closer to a longitudinal axis of the filter device than an outer periphery of the protective cantilevered member positioned above or below the plurality of through-holes. - View Dependent Claims (12, 13, 14, 15)
-
-
16. A fluid dispenser for a biological sample processing system, the fluid dispenser comprising:
-
a barrel including a main body and a piston coupled to the main body, the main body including a sidewall and a bottom at least partially defining a reservoir chamber for holding fluid; a valve; and a filter device positioned upstream of the valve and including a vertically oriented filtering element having a plurality of through-holes, wherein the filtering element extends upwardly through at least a portion of the reservoir chamber and is spaced apart from the sidewall of the main body such that fluid located directly between the filtering element and the sidewall of the main body flows laterally through the through-holes when the barrel is in a generally vertical orientation. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
-
Specification