Hub seal firestop device
OwnerKenneth R. Cornwallinventor
Life of this patent
Estimating the term…
Abstract
A firestop device (10) and firestop assembly for use in a plumbing system (100) installed in a structure to prevent the transmission of smoke and fire through the plumbing system. The firestop device includes a housing (12) with a connector (14) and intumescent material (16) mounted in the inner passageway (12C) of the housing. The firestop device is intended to be mounted over the hub portion (50B) of a plumbing fitting (50). When the housing is heated, the heat is transferred to the intumescent material which expands. As the intumescent material expands, the material crushes the conduit (102) extending through the firestop device and completely blocks the inner passageway (10C) of the firestop device which prevents smoke and fire from moving through the firestop device.
Claims28
A firestop device for mounting on a hub portion of a plumbing fitting of a plumbing system installed in a structure to prevent the transmission of smoke and fire through the plumbing fitting, which comprises:
- (a) a housing constructed of a heat resistant material having a first end and a second end with an inner passageway extending between the ends wherein a shape and size of the inner passageway at the first end is configured to extend over the hub portion of the plumbing fitting;
- (b) intumescent material held in the inner passageway of the housing at the second end wherein an inner diameter of the housing with the intumescent material at the second end of the housing is configured such as to prevent the inner passageway having the intumescent material from extending over the hub portion of the plumbing fitting wherein the intumescent material when heated is configured to crush a conduit of the plumbing system which extends through the firestop device and to completely fill the inner passageway of the housing at the second end;
- and
- (c) a connector positioned in the inner passageway of the housing spaced between the intumescent material and the first end of the housing.
A firestop device for mounting on a hub portion of a plumbing fitting to prevent transmission of smoke and fire through the plumbing fitting, which comprises:
- (a) a housing having a first end and a second end with an inner passageway having a cylindrical shape extending between the ends wherein a diameter of the inner passageway at the first end is configured to extend over the hub portion of the plumbing fitting;
- (b) intumescent material held in the inner passageway of the housing adjacent the second end;
- and
- (c) a connector having a first end and a second end with an inner passageway extending between the ends and positioned in the inner passageway of the housing spaced between the intumescent material and the first end of the housing wherein an inner diameter of the inner passageway of the connector at the first end of the connector is configured to allow the first end of the connector to extend over the hub portion of the plumbing fitting.
A firestop coupling assembly for preventing the transmission of smoke and fire through a partition in a structure, including a plumbing fitting having a hub portion, the improvement which comprises:
- a firestop device secured on the hub portion of the plumbing fitting, the firestop device including:
- a housing constructed of a heat resistant material with a first end and a second end with an inner passageway having a cylindrical shape extending between the ends, a diameter of the inner passageway at the first end configured to allow the first end of the housing to extend over the hub portion;
- intumescent material positioned in the inner passageway at the second end;
- and
- a connector having a first end and a second end and with an inner passageway extending between the ends and positioned in the inner passageway of the housing spaced between the intumescent material and the first end of the housing wherein an inner diameter of the inner passageway of the connector at the first end of the connector is configured to allow the first end of the connector to extend over the hub portion of the plumbing fitting.
A method for preventing the transmission of smoke and fire through a plumbing system in a structure, comprising the steps of:
- (a) providing a plumbing fitting having at least one hub portion;
- (b) providing a firestop device including a housing constructed of a heat resistant material having a first end and a second end with an inner passageway extending therebetween wherein the first end of the housing is configured to extend over the hub portion of the plumbing fitting;
- intumescent material positioned in the inner passageway at the second end;
- and a connector having a first end and a second end and with an inner passageway extending between the ends and positioned in the inner passageway of the housing spaced between the intumescent material and the first end of the housing wherein an inner diameter of the inner passageway of the connector at the first end of the connector is configured to allow the first end of the connector to extend over the hub portion of the plumbing fitting;
- (c) mounting the firestop device over the hub portion of the plumbing fitting;
- (d) installing the plumbing fitting in the plumbing system in the structure;
- and
- (e) heating the intumescent material to a first predetermined temperature such that the intumescent material expands to fill the inner passageway at the second end of the housing which prevents smoke and fire from entering the plumbing fitting through the hub portion having the firestop device and from being transmitted through the plumbing system in the structure.
A plumbing system for preventing transmission of smoke and fire through a partition in a structure, the system including a plumbing fitting having a hub portion and a conduit for mounting in the plumbing fitting, the improvement which comprises:
- a firestop device secured on the hub portion of the plumbing fitting, the firestop device including:
- a housing constructed of a heat resistant material with a first end and a second end with an inner passageway wherein a diameter of the inner passageway at the first end is such as to extend over the hub portion;
- and
- intumescent material held in the inner passageway at the second end of the housing and a connector having a first end and a second end and with an inner passageway extending between the ends and positioned in the inner passageway of the housing spaced between the intumescent material and the first end of the housing wherein an inner diameter of the inner passageway of the connector at the first end of the connector is configured to allow the first end of the connector to extend over the hub portion of the plumbing fitting.
Dependencies are inferred from the claim text.