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Class Information
Number: 405/179
Name: Hydraulic and earth engineering > Subterranean or submarine pipe or cable laying, retrieving, manipulating, or treating > By means advancing along terrain and guiding pipe or cable into subterranean position > With backfill or bedding material conveying or dispensing means
Description: Methods or apparatus wherein either (a) a bottom layer of material is placed in a trench prior to the placement of the string or conduit therein, or (b) a covering material is either dispensed from a supply hopper or conveyed from the point at which it was removed from the trench, and is deposited upon a string or conduit which has been positioned in the trench.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8596914 Tile laying and covering apparatus Dec. 3, 2013
8480332 Laying and protecting cable into existing covering surfaces Jul. 9, 2013
8449217 Trench paver attachment May. 28, 2013
8215870 Systems and methods for protecting subterranean structures Jul. 10, 2012
8157477 Trenching and drain installation system and method Apr. 17, 2012
8047744 Conduit laying machine Nov. 1, 2011
7886463 Pipeline padding machine Feb. 15, 2011
7607863 Automated pipe-laying method and apparatus Oct. 27, 2009
7581903 Method of manufacture and installation flowable thermal backfills Sep. 1, 2009
7310896 Mechanized unit for protectively encasing a utility in a trench with processed excavated trench material Dec. 25, 2007
7237982 Agricultural implement for installing an irrigation system Jul. 3, 2007
7186059 Padding machine and method of use Mar. 6, 2007
7074305 Pipeline support Jul. 11, 2006
6981342 Screening laying box Jan. 3, 2006
6899842 Method and installation for laying a cylindrical pipe on a support May. 31, 2005
6854931 Apparatus for establishing adjustable depth bed in trenches for utility lines and encasing the lines Feb. 15, 2005
6763925 Self propelled backfilling apparatus Jul. 20, 2004
6644891 Composition having low thermal resistivity and method for laying underground cables for carrying electrical energy Nov. 11, 2003
6622403 Backfill and grading apparatus Sep. 23, 2003
6530723 Device and process for excavating and backfilling of soil Mar. 11, 2003
6502333 Pipeline padding machine and method Jan. 7, 2003
6478508 Apparatus for laying underground electric cables Nov. 12, 2002
6418644 Apparatus and method for padding the ground below a duct using excavated soils, equipment for compacting soil below a duct, and a soil-compacting mechanism Jul. 16, 2002
6413018 Method for supporting a pipeline in a trench Jul. 2, 2002
6374915 Process and apparatus for sealing abandoned well bores Apr. 23, 2002
6371691 Method of introducing optical cable into a solid bed Apr. 16, 2002
6345933 Tank with backfill deflectors Feb. 12, 2002
6318930 Efficient method and pulverizer for pipeline trench padding Nov. 20, 2001
6312194 Device for excavating and redepositing earth Nov. 6, 2001
6302257 Self propelled backfilling apparatus with controllable steering of material stream Oct. 16, 2001
6280119 Apparatus and method for placing and engaging elongate workpieces Aug. 28, 2001
6158925 Apparatus for installing pipeline fill Dec. 12, 2000
6139223 Trench filler Oct. 31, 2000
6125558 High volume pipe padding machine Oct. 3, 2000
6095721 Method and device for burying a conduit under water Aug. 1, 2000
6055749 Apparatus for padding underground conduits May. 2, 2000
6029378 Apparatus for padding underground conduits Feb. 29, 2000
5938373 Apparatus for padding a trench including crusher for pulverizing excavated material into grades of material Aug. 17, 1999
5930923 Method for operation to excavate underdrain in the field ground and a device for operation to excavate underdrain Aug. 3, 1999
5921707 Method of filling an excavated opening Jul. 13, 1999
5913638 Sand channel trenching and pipe laying apparatus Jun. 22, 1999
5911544 Soil compactor Jun. 15, 1999
5879109 Process and apparatus for introducing an optical or electrical cable into solid ground Mar. 9, 1999
5846026 Method for pipeline padding Dec. 8, 1998
5765966 Sub-surface trenching and backfill apparatus Jun. 16, 1998
5765967 Method and apparatus for backfilling pipeline trenches Jun. 16, 1998
5741087 Chain separator for padding machine Apr. 21, 1998
5694709 Pipeline padding machine with crusher Dec. 9, 1997
5632574 Backfilling device and apparatus therefor May. 27, 1997
5611643 Process for the construction of trenches Mar. 18, 1997

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