Back to results
US 4,733,016 AGranted
Transit for cables and pipes
AssigneeHawke Cable Glands Limited
InventorsMichael Twist, Alan Platt
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeHawke Cable Glands Limited
InventorsMichael Twist, Alan Platt
Estimating the term…
In a lead-through transit for cables or pipes 3 of the kind in which a series of modular resilient blocks 4 or blanks 5 are mounted in a frame 1 through which the cables 3 extend, the invention is directed to the compression and packer assembly 7 by which the opening through the frame 1 is closed and pressure applied to the assembled cables 3, blocks 4 and blanks 5 with stayplates 6 between each row of blocks. The compression and packer assembly 7 comprises a rigid plate 8 which seats on the assembled blocks 4 and blanks 5 for engagement by a compression bolt 33 mounted on the frame 1 to apply a load to the plate 8. Three resilient packer blocks 9,10 and 11 are arranged to be inserted between the plate 8 and frame 1 with two of the blocks 9,11 being for insertion on either side of the bolt 33 and having respective distance members as rods 28 to limit the reactive effect of the assembled blocks 4 and blanks 5 with cables 3 so that the compression bolt 33 can be displaced clear of the center of the frame 1 to leave a clearance spaced into which the center packer block 10 is inserted. Each packer block 9,10 and 11 has an associated compressor stud 12,13 and 14 which acts to compress it's block thereby expanding the packer blocks into tight sealing engagement between and with the plate 8 and the frame 1. The arrangement of the compression and packer assembly ensures improved sealing of the transit and is simpler to handle and assemble than prior arrangements.
A lead-through transit of the kind comprising a rectangular metal frame defining an opening through which cables or pipes extend, a series of sets of modular blocks assembled in rows within said frame opening, said modular blocks surrounding each cable or blanking off a modular space, and a compression and packer assembly mounted in said frame opening and clamping the assembled modular blocks together and around each cable with the compression and packer assembly completing filling of said frame opening, the improvement being that said compression and packer assembly comprises:
A lead-through transit comprising a rectangular metal frame having opposed side walls and opposed end walls defining an opening, a rigid metal plate located in said opening and extending between said opposed side walls, a plurality of modular blocks located in and filling said opening on one side of said rigid plate, at least one of said modular blocks defining a passageway extending from front to back of said frame through which a cable extends, a plurality of packer blocks of resilient material including at least one first packer block and at least one second packer block located in and together filling said opening on the other side of said rigid plate, each said packer block extending from front to back of said frame and defining a through bore extending substantially parallel with the cable axis, a respective compression stud extending through each one of said bores and compressing the associated packer block to apply a load to said rigid plate and the modular blocks to clamp the modular blocks together and seal the cable, the transit further comprising a compression bolt mounted in one of said end walls adjacent to said packer blocks, said bolt being axially moved in a direction substantially normal to the cable axis in one sense and temporarily engaging said rigid plate to pre-load said rigid plate and said modular blocks whereby said at least one first packer block is inserted adjacent thereto and said bolt then being moved in the other sense from engagement with said rigid plate and clear of said frame opening whereby said at least one second packer block is inserted to complete filling of said frame opening with said packer blocks.
A lead-through transit comprising a rectangular metal frame defining an opening through which cables extend, a series of sets of modular blocks located in and partially filling said frame opening, said modular blocks surrounding each cable or blanking off a modular space, a rigid plate located in said frame opening between opposed side walls of said frame with said assembled modular blocks and cables abutting one side of said plate, a plurality of packer blocks of resilient material including at least one first packer block and at least one second packer block located in said frame opening between an end wall of said frame and the other side of said plate remote from said assembled modular blocks and cables which together complete filling of said frame opening, each said packer block extending between entry and exit sides of said frame opening and defining a respective through bore extending substantially parallel to the axes of the cables, a respective compressor stud extending through each said bore and applying compression to the associated packer block within the confines of said frame to clamp said assembled modular blocks together around said cables, and a compression bolt mounted in said end wall and axially movable in one sense and temporarily engaging said rigid plate to pre-load said assembled modular blocks and cables whereby said at least one first packer block is inserted adjacent thereto and said compression bolt then being movable in the other sense from engagement with said rigid plate and clear of said frame opening following which insertion of said at least one second packer block is made and completes filling of said frame opening with said packer blocks.
Dependencies are inferred from the claim text.