Injection septum with dust wiper

Details Injection septum with dust wiper Injection septum with dust wiper

1994-09-21

1996-07-02

Spitzer, Robert

Gas separation: apparatus

Chromatography type apparatus

Including injection system or inlet fluid distributor

2101982, 215247, 215310, B01D 1508

Patent

active

055318100

ABSTRACT:
A cap assembly for a gas chromatography injection port includes a two-piece septum. The two-piece septum includes a syringe seal for sealing an injection needle and a duckbill seal for sealing the injection port when the needle is not inserted. The syringe seal includes three annular ribs in its aperture. At the aperture base is a sealing rib that provides the main sealing function for the syringe seal. Just above the sealing rib is a stress-relief rib. At the top of the aperture is a wiping rib. The wiping rib wipes dust on the needle exterior so that it does not enter the aperture. Dust entering the aperture can be retained in the relatively large dust pocket between the wiping rib and the strain-relief rib. The septum is held in place by a septum nut that has a recess above the wiping rib for holding dust removed from the needle by the wiping rib. A washer in the recess prevents the syringe seal from deforming into the recess. The septum nut includes a guide aperture section that aligns the syringe needle with the apertures of the syringe seal and the duckbill seal. The septum nut is made of anodized aluminum to provide ready machinability for formation of the guide aperture section and sufficient hardness to resist damage inflicted by the syringe needle.

REFERENCES:
patent: 4954149 (1990-09-01), Fullemann
patent: 4969938 (1990-11-01), America
patent: 5193703 (1993-03-01), Staats, III et al.
patent: 5338448 (1994-08-01), Gjerde
JADE Valve advertisement, date unknown.

Affiliated with

Also associated with

Rating

Injection septum with dust wiper does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Injection septum with dust wiper, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Injection septum with dust wiper will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1502889