Spring-collet mechanism for activating a fire extinguisher

Patent metadata

Field	Value
Publication number	US-9861846-B2
Application number	US-201514602811-A
Country	US
Kind code	B2
Filing date	Jan 22, 2015
Priority date	Jan 22, 2015
Publication date	Jan 9, 2018
Grant date	Jan 9, 2018

Abstract

The present disclosure relates to a broadhead cutter activation mechanism and system inside of a fire extinguisher. The broadhead cutter device may be attached to a cutter shaft which is driven downward when the elastic potential energy is released form a spring system. The broadhead cutter device may be configured to pierce and open a burst disc to release the flow of an extinguishing agent under pressure.

First claim

What is claimed is:

1. A fire extinguisher system comprising:
a broadhead cutter configured to pierce a burst disc;
a broadhead cutter shaft coupled to the broadhead cutter;
a spring system coupled to the broadhead cutter shaft;
a spring releasing mechanism coupled to the spring system;
a collet configured to retain the spring system in a non-actuated position, wherein an outer flange of the collet engages a recess within the broadhead cutter shaft; and
a pull rod configured to retain the collet in a standby position, the spring releasing mechanism coupled to the spring system via the pull rod,
wherein the spring releasing mechanism is electrically activated, and
the collet encompasses the pull rod.

2. The fire extinguisher system according to claim 1 , further comprising a stop ring configured to retain the broadhead cutter shaft within a discharge head.

3. The fire extinguisher system according to claim 1 , wherein the broadhead cutter is configured to pierce the burst disc in response to actuation of the spring system.

4. The fire extinguisher system according to claim 1 , wherein the fire extinguisher system is pyrotechnic free.

5. The fire extinguisher system according to claim 1 , further comprising the burst disc, wherein the burst disc is configured to petal out into a plurality of petal like shapes in response to piercing by the broadhead cutter.

6. The fire extinguisher system according to claim 5 , wherein an extinguishing agent expelled from within the fire extinguisher aids in opening of the plurality of petal like shapes of the burst disc.

7. The fire extinguisher system according to claim 1 , wherein the spring system pushes the broadhead cutter shaft downward in response to the pull rod being pulled upward by the spring releasing mechanism.

8. The fire extinguisher system according to claim 1 , wherein, in the standby mode, a face of the cutter shaft holds the spring system in compression.

9. The fire extinguisher system according to claim 1 , further comprising a lock pin spring encompassing the pull rod and configured to apply a positive pressure on the pull rod.

Assignees

• Kidde Tech Inc

Inventors

• Frasure David
• Porterfield John Wright

Classifications

• A62C37/04

  with electrically-controlled release · CPC title

• A62C35/023

  the extinguishing material being expelled by compressed gas, taken from storage tanks, or by generating a pressure gas (for foam generation A62C5/02) · CPC title

• A62C35/11

  controlled by a signal from the danger zone · CPC title

• A62C13/74

  the pressure gas container being pierced or broken · CPC title

• A62C13/70 Primary

  characterised by means for releasing the pressure gas · CPC title