Fire extinguisher with means for preventing freezing at outlet

Details Fire extinguisher with means for preventing freezing at outlet Fire extinguisher with means for preventing freezing at outlet

2005-06-07

2005-06-07

Nguyen, Dinh Q. (Department: 3752)

Fire extinguishers

Portable vessels

Gas pressure

C169S078000, C169S085000, C169S030000

Reexamination Certificate

active

06902009

ABSTRACT:
A method and an apparatus for preventing freezing at the outlet of a fire extinguisher are disclosed. Moisture in the fire extinguisher fluid is removed by contacting the fluid in the fire extinguisher bottle with a desiccant such as molecular sieve 3A. After the fluid in the extinguisher has been in contact with the desiccant for a week, the moisture level is about 5 ppm, well below the 40 ppm which causes freezeup at the outlet. The desiccant is preferably placed inside a metal screen tube having metal wire loops extending from the sides of the mesh tube. The wire loops keep the mesh tube away from the outlet so that flow restriction will not occur. The wire loops also protect the desiccant from being damaged when the fire extinguisher is discharged and provide a handle which can be used to pull the metal screen tube out of the bottle during refurbishment.

REFERENCES:
patent: 777131 (1904-12-01), Nuhring
patent: 903527 (1908-11-01), Wilbur
patent: 2389502 (1945-11-01), Griswold et al.
patent: 4269905 (1981-05-01), Wedlake
patent: 4643260 (1987-02-01), Miller
patent: 5038867 (1991-08-01), Hindrichs et al.
patent: 5501284 (1996-03-01), Clodfeltter et al.
patent: 5845716 (1998-12-01), Birk
patent: 03773044 (1987-05-01), None
patent: 974633 (2000-01-01), None
patent: 841628 (1981-06-01), None

Affiliated with

Also associated with

Rating

Fire extinguisher with means for preventing freezing at outlet does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fire extinguisher with means for preventing freezing at outlet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fire extinguisher with means for preventing freezing at outlet will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3459200