US 11,655,919 B2
Fire protection sleeve
Herbert Muenzenberger, Wiesbaden (DE)
Assigned to Hilti Aktiengesellschaft, Schaan (LI)
Filed by Hilti Aktiengesellschaft, Schaan (LI)
Filed on Sep. 8, 2021, as Appl. No. 17/468,972.
Application 17/468,972 is a continuation of application No. 16/829,035, filed on Mar. 25, 2020, granted, now 11,137,091.
Application 16/829,035 is a continuation of application No. 16/292,429, filed on Mar. 5, 2019, granted, now 10,641,417, issued on May 5, 2020.
Application 16/292,429 is a continuation of application No. 15/568,562, granted, now 10,415,725, issued on Sep. 17, 2019, previously published as PCT/EP2016/059344, filed on Apr. 27, 2016.
Claims priority of application No. 15165180 (EP), filed on Apr. 27, 2015.
Prior Publication US 2022/0003337 A1, Jan. 6, 2022
Int. Cl. F16L 5/04 (2006.01); A62C 2/06 (2006.01); H02G 3/04 (2006.01); H02G 3/22 (2006.01); A62C 3/16 (2006.01)
CPC F16L 5/04 (2013.01) [A62C 2/065 (2013.01); A62C 3/16 (2013.01); H02G 3/0412 (2013.01); H02G 3/22 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A firestop apparatus, comprising:
a frame with an open front end and an open rear end;
a block disposed within the frame between the open front end and the open rear end, the block having a first thickness and being made of a first material comprising a first passageway extending between the open front end and the open rear end; and
an inlay disposed between the open front end of the frame and a front surface of the block, the inlay comprising a second passageway aligned with the first passageway of the block and being made from a second material of a second thickness different from the first thickness, wherein the first passageway and the second passageway are occupied by at least one line in an installed state that allows the at least one line to pass through the open front end and the open rear end of the frame, wherein the open front end of the frame has an opening of a first size, and wherein the first passageway has a second size different from the first size.