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| Number | Title | Issue Date |
| 7883296 | Shoring beam extension and reinforcement assembly A shoring beam extension and reinforcement assembly allows a user to removably connect a plurality of shoring beams together so as to customize a support assembly to a particular excavation site. In use, main shoring beams extending around the periphery of an excava... | 02/08/2011 |
| 7837413 | Adjustable trench box and spreader bar An adjustable spreader bar of a trench box has male and female telescoping pipes. The male telescoping pipe has a plurality of indexed openings, and the female telescoping pipe has an outer threaded portion with a groove to receive a locking pin. A sleeve is threada... | 11/23/2010 |
| 7690867 | Center beam connection assembly for temporary shoring A center beam connection assembly for temporary shoring includes a pair of end-caps adapted to fit over respective ends of a center shoring beam. Arms extending from each end-cap engage a web of a main shoring beam in a excavation site shoring system. The end-caps m... | 04/06/2010 |
| 7537417 | Corner connection for temporary shoring A connection arrangement for temporary shoring in an excavation site is used to secure I-beams together at corners within the excavation site. Typically, four I-beams are connected together to form a rectangular frame that is suspended within the excavation for brac... | 05/26/2009 |
| 7402003 | Trench box moving apparatus and method There is disclosed an apparatus and method for moving with an excavator arm a trench box having a pair of adjacent spreader bars at a forward end. The apparatus has a bracket end for connecting to the excavator arm and a hooking fork. The hooking fork has a first su... | 07/22/2008 |
| 7309190 | Shoring device with removable swivel side plates containing detente sphere attachments A shoring device is disclosed comprising a piston and a cylinder. The piston is axially expanded by compressed gas, whereby the shoring device engages two opposing surfaces. Removable swivel sideplates comprise détente sphere attachments by which the sideplates rev... | 12/18/2007 |
| 7290961 | Lightweight trench shield A lightweight trench shield having side panels spaced apart by spreaders. Each panel has a core formed of a metal honeycomb with the core faces having a fiber in resin matrix layer thereon. The core density varies with regions proximate the spreader supports being i... | 11/06/2007 |
| 7258511 | Shoring system Improved shoring systems and methods are disclosed. In one embodiment, a shoring system includes first and second opposing side walls. A manifold is pivotally connected to the first side wall and is pivotally moveable between a shielded position and an exposed posit... | 08/21/2007 |
| 7140808 | Catwalk device and method A catwalk is provided for use in trenching operations that provides increased safety and improves efficiency. Methods are also provided that save time over the prior process of building multiple land bridges. Selected features include reduction in the number of ladd... | 11/28/2006 |
| 7140831 | Attachment for forming shapes following excavation An attachment for a skid steer loader, back hoe or powered excavator that can be used to quickly smooth out the walls of a swimming pool, ditch, etc. following the excavation and the process of using the attachment. The attachment includes a vertical flat surface pe... | 11/28/2006 |
| 7128500 | Corner connection for temporary shoring A connection arrangement for temporary shoring in an excavation site is used to secure I-beams together at corners within the excavation site. Typically, four I-beams are connected together to form a rectangular frame that is suspended within the excavation for brac... | 10/31/2006 |
| 7101119 | Shoring assembly and method An inventive apparatus and method provides for restricting movement from a collapsed or folded position of a pair of rails employed by a shoring assembly. The shoring assembly has a plurality of first pads each pivotally connected to one of the rails, a plurality of... | 09/05/2006 |
| 7056067 | Trench shoring device This invention discloses a device for shoring open excavations including a pair of shoring panels held vertically apart and parallel to each other against sidewalls of excavation by a pair of strutting assemblies. Each shoring panel having laterally on either end a ... | 06/06/2006 |
| 7021868 | Lightweight shoring system for accommodating crossing utilities An excavation shoring system having four vertical, cylindrical poles, each connected to a base element, arranged to constitute corners of a rectangle. At least one vertically oriented shoring panel corresponding to each side of the rectangle is provided, with each o... | 04/04/2006 |
| 6984092 | Corner connection for temporary shoring A corner connection used to secure I-beams together at corners within the excavation site is provided with a reinforcing assembly that allows for greater loads. Typically, four I-beams are connected together to form a rectangular frame that is suspended within the e... | 01/10/2006 |
| 6964542 | Pin and collar shoring device A shoring device is disclosed comprising a piston and a cylinder. The piston is axially expanded by compressed gas, whereby the shoring device engages two opposing surfaces. An outer cam collar and a concentrically enclosed inner ring are mounted upon the cylinder e... | 11/15/2005 |
| 6907957 | Trench shield ladder A trench shield ladder that hangs on the wall of the trench shield to provide workmen safe access to a trench. The ladder is provided with a top platform and hand rails that extend over the platform. The ladder can be adjusted in length by employing an extension por... | 06/21/2005 |
| 6554544 | Method to build a water seal, creep-line increasing cutoff A method for building a continuous water seal, creep line increasing cutoff includes the steps of forming spaced borings into the soil in the presence of slurry; developing narrow slots between the formed borings by driving foil boards with cutting edges ... | 04/29/2003 |
| 6474911 | Trench sheeting device A trench sheeting device consists of trench sheeting boxes which are each made up of two trench plates supported against each other, the width of the trench apart, and at least one shaft sheeting box whose width exceeds that of the trench. The shaft sheet... | 11/05/2002 |
| 6443665 | Trench shielding and shoring device A portable shoring device for securing the sidewalls of an excavation having a pair of walls or panels mutually facing each other and being held in spaced apart relationship by at least one support bar. Attached at opposite ends of each panel are vertical... | 09/03/2002 |
| 6416259 | Corner connection for temporary shoring A connection arrangement for temporary shoring in an excavation site is used to secure I-beams together at corners within the excavation site. Typically, four I-beams are connected together to form a rectangular frame that is suspended within the excavati... | 07/09/2002 |
| 6267538 | Beam joining cap for trench shield An apparatus for joining at least two or more wales of a shoring system including a first substantially rigid end-cap adapted to enclose an end of a first horizontally disposed wale, the first end-cap having a horizontally extending flange with a first ve... | 07/31/2001 |
| 6224296 | Sliding double panel type trench shoring system A trench shoring system using panels as shoring walls to prevent possible collapse of natural ground walls of trenches in trenches such as for burying pipes underground, having a sliding panels type trench shoring system that offers increased safety durin... | 05/01/2001 |
| 6164875 | Trench shield directly ridable and movable on a constructing pipe A trench shield includes a pair of shielding panels for protecting opposite side walls of a trench excavation, two side frames are provided for restively adjustably securing the two shielding panels on the two side frames, and have a plurality of brace ... | 12/26/2000 |
| 6164874 | Sheeting device A sheeting device includes a column with two supporting surfaces in one guide channel. The second supporting surface is provided with an offset relative to the first supporting surface. The offset is both toward the middle of the column in the lengthwise ... | 12/26/2000 |
| 6155750 | Trench shield having wheels simultaneously provided for protection and rolling purposes A trench shield includes: a pair of shielding wheels rotatably mounted on a pair of retaining plates; a plurality of brace members passing through two retaining plates for retaining the two shielding wheels, each shielding wheel formed as a protective ... | 12/05/2000 |
| 5931608 | Trench shoring transport device An trench shoring transport device having a trench box depending from a frame, the frame including a pair of side frame subassemblies which are slideably and adjustably engaged to each other allowing the width of the frame and hence the width of the devic... | 08/03/1999 |
| 5902075 | Trench falsework system Proposed is a trench falsework which includes a base box (3) made up of lining panels (5) held apart by braces (8). The panels making up the box have a flat edge (7) along the top and a cutting edge (6) along the bottom. The falsework system also includes... | 05/11/1999 |
| 5876153 | Trench falsework panel A lining plate intended for employment in connection with trench lining in below-grade construction becomes assembly- and removal-friendly and simultaneously resistant to flexural buckling even against forces acting during driving in by means of the excav... | 03/02/1999 |
| 5868526 | Trench shield A trench shield or manhole shield which has tapered side shields. The walls of each side shield are tapered. The outer walls are tapered inwardly from front to rear (in the case of the trench shield) or from top to bottom (in the case of a manhole shield)... | 02/09/1999 |
| 5865567 | Movable trench shoring device An improved movable trench shoring device having a trench box depending from a frame, the frame including a pair of end frame members, a pair of side frame members and a pair of cross frame members. A pair of wheel assemblies are mounted along either of t... | 02/02/1999 |
| 5829921 | Trench falsework panel The invention concerns a panel for use in trench falsework as part of a box construction or in sliding forms in civil-engineering. The falsework is easy to mount in place and is resistant to buckling, even along the triangular hollow section which forms t... | 11/03/1998 |
| 5741091 | Shoring device with load optional enhancing spreaders A shoring device for supporting trench side walls during construction. The shoring device has opposite shoring shields having conventionally located spreaders adjacent the upper edge of the shields and a second pair of spreaders disposed at an upper locat... | 04/21/1998 |
| 5725330 | Joining arrangement Joining arrangements (7) capable of swivelling around an axis bolt (6) are limited in their swivelling by one of the springs of a pair of springs (12, 13) welded together into a unit to make it possible to individually or alternately drive or pull opposit... | 03/10/1998 |
| 5720580 | Apparatus for and method of shoring a trench An apparatus for and a method of shoring a trench. The apparatus includes two vertical posts which are adapted to be disposed at the borders of the trench in an opposite relation and a rigid frame which is locatable at and vertically movable along the pos... | 02/24/1998 |
| 5669738 | Modular trench box sheeting Modular trench box sheeting panels for use in wall supporting during the excavation of trenches or the like. A rectangular support frame is formed by a pair of sheeting support members secured to one another by pairs of spreader members at oppositely disp... | 09/23/1997 |
| 5527137 | Knife structure for shoring assemblies used in excavations An improvement for use with protective panels that buttress the walls of an excavation is in the form of a knife structure that is releasably connected to the bottom edge of a protective panel by means of a plurality of cooperative connectors. The knife s... | 06/18/1996 |
| 5503504 | Sheeting device A sheeting device having large-size sheeting panels (2,4) supported against vertical supports (1,3) which are arranged in pairs facing each other and are spaced-apart by at least one spreader frame (5). The side walls (15,15') of the supports (1,3) having... | 04/02/1996 |
| 5336023 | Self-propelled trench box A self-propelled trench box includes a pair of side panel enclosures and respective drive tracks mounted within the enclosures. The drive tracks are powered by a compact hydraulic drive mechanism mounted within the trench box to move the trench box in eit... | 08/09/1994 |
| 5310290 | Protective structure for excavations A protective panel may be used alone or paired to form a protective structure to provide a protected space in an excavation by buttressing the upright walls of the excavation. The protective panel is constructed of a corrugated aluminum sheet that has alt... | 05/10/1994 |
