US 10,850,143 B2Granted

Activator of pilot type fire protection systems and sytems using same

AssigneeVictaulic Company

InventorsThomas Edwin Archibald, Yoram Ringer

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Abstract

An activator for a pilot type firefighting system for accelerating firefighting system activation is disclosed. The system comprises a control valve which acts to control firefighting fluid flow to a distribution system, and configured such that release of pressure to a control chamber would activate the control valve. The activator comprises a first chamber in fluid coupling to the pilot fluid and a second chamber in fluid coupling to the pilot line via a flow restrictor. A pressure sensing member is disposed such that pressure difference between the chambers would cause an activation of a switch. The release of the switch directly or indirectly causes activation of an electrical valve which vents the pressure in the control chamber. Several aspects of the invention include various firefighting arrangements, various optional features of the activator, firefighting system, and several methods of operation of a system utilizing the activator.

Claims15

Dependent claims

An electromechanical firefighting system activator comprising:

a body defining an inner cavity;
a pressure sensing member at least partially disposed within the cavity, the pressure sensing member dividing the cavity into a first and second chambers, at least a portion of the pressure sensing member being movable from a closed to an open state, responsive to pressure difference in the first and second chambers;
a pilot fluid port being in fluid communication with the first chamber;
the first and second chambers having a fluid coupling path therebetween, the fluid coupling path comprising a fluid flow restrictor disposed to control fluid flow from the first chamber and the second chamber, the restrictor has a smaller flow rate from the second chamber to the first chamber, than the flow rate enabled by the pilot fluid port from the first chamber;
a switch actuation mechanism coupled to the pressure sensing member and movable responsive to the state of the pressure sensing member;
a switch disposed to be actuated by the switch actuation mechanism.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/047,306Filed 27 Jul 2018 · us provisional application
Priority: 28 Jul 2017
Published: US 2019/0030385 A131 Jan 2019
Granted: 1 Dec 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

A62C 35/66
Pressurised: accelerators
A62C 35/68
Pipe-line systems: details, e.g. of pipes or valve systems
A62C 37/08
Control of fire-fighting equipment: comprising an outlet device containing a sensor, or itself being the sensor, i.e. self-contained sprinklers
A62C 37/36
Control of fire-fighting equipment: an actuating signal being generated by a sensor separate from an outlet device