US 12,253,200 B2
Device for passing pipes or cables through an opening in a building
Mario Paetow, Igling (DE); Christian Förg, Lamerdingen (DE); Rudolf Semler, Prittriching (DE); and Thomas Monden, Stetten (DE)
Assigned to Hilti Aktiengesellschaft, Schaan (LI)
Filed by Hilti Aktiengesellschaft, Schaan (LI)
Filed on Jan. 19, 2024, as Appl. No. 18/417,836.
Application 18/417,836 is a continuation of application No. 18/153,877, filed on Jan. 12, 2023, granted, now 11,913,585.
Application 18/153,877 is a continuation of application No. 17/934,345, filed on Sep. 22, 2022, granted, now 11,578,822, issued on Feb. 14, 2023.
Application 17/934,345 is a continuation of application No. 17/568,082, filed on Jan. 4, 2022, granted, now 11,585,466, issued on Feb. 21, 2023.
Application 17/568,082 is a continuation of application No. 16/855,049, filed on Apr. 22, 2020, granted, now 11,242,946, issued on Feb. 8, 2022.
Application 16/855,049 is a continuation of application No. 16/382,475, filed on Apr. 12, 2019, granted, now 10,663,090, issued on May 26, 2020.
Application 16/382,475 is a continuation of application No. 15/924,160, filed on Mar. 16, 2018, granted, now 10,295,088, issued on May 21, 2019.
Application 15/924,160 is a continuation of application No. 15/171,593, filed on Jun. 2, 2016, granted, now 9,982,805, issued on May 29, 2018.
Application 15/171,593 is a continuation of application No. PCT/EP2014/076168, filed on Dec. 2, 2014.
Claims priority of application No. 13196170 (EP), filed on Dec. 9, 2013.
Prior Publication US 2024/0151329 A1, May 9, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. F16L 5/04 (2006.01); H02G 3/22 (2006.01)
CPC F16L 5/04 (2013.01) [H02G 3/22 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A device, comprising:
a housing, configured to be installed in an aperture in a ceiling or wall of a building, said housing comprising four walls forming a channel with a first and second end;
a first brush mounted on a first wall of the four walls of the housing and a second brush mounted on a second wall of the four walls of the housing, the first wall and second wall opposite each other and the first brush and the second brush extending into the channel, the first brush and the second brush comprised of bristles with said bristles configured to mesh with each other to close the passage channel, thereby forming a convection barrier;
a first flange and a second flange wherein the first flange is provided to completely surround the aperture as to the first corresponding surface of the wall or ceiling of the building and wherein the second flange is provided to completely surround the aperture as to the second corresponding surface of the wall or ceiling of the building;
a first material mounted on the first wall of the four walls of the housing, the first material comprising an intumescent and extending into the channel at a location between the first end and second end; and
a second material mounted on the second wall of the four walls of the housing, opposite the first material, the second material comprising an intumescent and extending into the channel at a location between the first end and second end,
wherein the brushes move to accommodate the passage of an object through the channel, the object to enter the channel at the first end and to exit the channel at the second end,
wherein the first material curves in an axial direction within the channel and at least partially surrounds the object in the channel as the object passes through the channel, and
wherein the first material does not directly contact the second material prior to the object passing through the channel.