Automatically pressing a filter into a blood-collection tube

Details Automatically pressing a filter into a blood-collection tube Automatically pressing a filter into a blood-collection tube

1997-11-18

2000-06-20

Walker, W. L.

Liquid purification or separation

Processes

Including controlling process in response to a sensed condition

210 86, 210 90, 210 91, 210 95, 210 97, 210744, 210745, 210780, C02F 100

Patent

active

060774428

ABSTRACT:
A filter is pressed down in a collection tube holding separated blood as a lower solids mass and an upper liquid mass defining with the lower mass an interface. The filter has a sleeve fittable in the tube and having a lower end covered by a membrane that fits snugly in the tube. A vertical level of an upper surface of the upper liquid mass in the tube is detected and a pusher is engaged with an upper end of the sleeve to push the filter downward in the tube. Downward pushing of the filter is stopped when the upper end of the sleeve is at a predetermined spacing above the vertical level of the liquid upper surface. A vertical level of the interface is also detected and downward pushing of the filter is also stopped when the membrane is at the vertical level of the interface. Thus two separate events can trigger stopping of the downward pushing: reaching the interface or reaching a certain fill level in the sleeve.

REFERENCES:
patent: 4021352 (1977-05-01), Sarstedt
patent: 4057499 (1977-11-01), Buono
patent: 4602995 (1986-07-01), Cassaday et al.
patent: 4828716 (1989-05-01), McEwen et al.

Affiliated with

Also associated with

Rating

Automatically pressing a filter into a blood-collection tube does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatically pressing a filter into a blood-collection tube, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatically pressing a filter into a blood-collection tube will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1849459