US 12,329,998 B2
Passive fire protection device
Mark Prior, Taren Point (AU)
Assigned to BOSS PRODUCTS (AUSTRALIA) PTY LTD, Taren Point (AU)
Filed by BOSS Products (Australia) Pty Ltd, Taren Point (AU)
Filed on Aug. 25, 2022, as Appl. No. 17/895,505.
Claims priority of application No. 2021221808 (AU), filed on Aug. 25, 2021.
Prior Publication US 2023/0067729 A1, Mar. 2, 2023
Int. Cl. A62C 2/06 (2006.01); F16L 5/04 (2006.01)
CPC A62C 2/065 (2013.01) [F16L 5/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A firestop for one or more service components, the firestop comprising:
a housing having:
a first tubular part that defines a first longitudinal end of the housing, the first tubular part having a first inner end portion at an opposing end of the first tubular part to the first longitudinal end,
a second tubular part that defines a second longitudinal end of the housing, the second tubular part having a second inner end portion at an opposing end of the second tubular part to the second longitudinal end, and
a passageway that extends between the first and second longitudinal ends, and that is defined by at least the first and second tubular parts, whereby when the firestop is installed in a building, the service components are to extend through the passageway,
a mating interconnection between the first and second tubular parts that permits the length of the housing between the first and second longitudinal ends to be adjustable between a maximum length and a minimum length, the mating interconnection being configured such that the second inner end portion is shaped to be received within the first inner end portion, wherein a part of the second inner end portion that is internally of the first inner end portion increases as the length of the housing between the first and second longitudinal ends decreases; and
intumescent material that is supported by the housing and that swells in response to heat, the intumescent material being arranged into at least:
a first portion that is supported by the first tubular part, and is disposed at the first longitudinal end to swell in response to heat in at least an inward direction with respect to the first portion, and
a second portion that is supported by the second tubular part, and is disposed at the second longitudinal end to swell in response to heat in at least an inward direction with respect to the second portion,
wherein when the firestop is arranged such that the length of the housing between the first and second longitudinal ends is at the minimum length, the second inner end portion is disposed within a region of the first tubular part that supports the first portion of the intumescent material, without interfering with the capacity of the first portion to swell in response to heat in at least an inward direction with respect to the first portion.