Patent Application
20090263195
U.S. Pat. No. 3,203,188 discloses a method and apparatus for preparing a trench for a subsurface conduit line and for laying such a line. A conventional trench digging machine which includes a vertically adjustable frame supporting a power driven digging wheel with digging buckets mounted to the periphery of the wheel allows for digging trenches at different depths.
A chain and sprocket drive is utilized to drive the wheel. The earth is treated to separate the fine particles from the larger particles through the use of mesh. The screen or mesh is inclined so the rocks will gravitate to the shoot. After the particles are separated, the fine particles of the earth are deposited on the bottom of the trench to act as a cushion pad on which the conduit can be laid. A conveyor belt transfers the fine particles to the bottom of the trench and a leveling shoe adjusts the mound to give the pad a depth which may be on the order of six or more inches.
U.S. Pat. No. 3,332,249 discloses a trench digging and refilling apparatus. The digger has a vertically oriented trench digging unit which is attached to a tractor. The digging unit continuously elevates dirt onto a circular conveyor which conveys the dirt and discharges it rearwardly into the trench after a continuously fed cable is placed in the trench between the locations of digging and refilling.
U.S. Pat. No. 3,905,200 discloses a cable laying attachment for vehicles. The attachment has an elongated beam member to connect to the front end of the vehicle. A support arm is arranged as a tubular structure which can telescope. A plow blade carrier, a plow and a cable shoe are carried at the rear end of the beam member. During the course of plowing, the plow blade is positioned in a straight longitudinal position relative to the path of movement of the tractor. The cable is fed through the shoe as it is supplied from a drum. The cable is fed over the pulley and into a guide shoot in the shoe. The vertical positioning of the beam member is accomplished by the support arm through the medium of cylinder members. The depth of the plow is accomplished through suitable actuation of the cylinder. As the plow travels through the ground, the cable is laid immediately afterwards in its desired vertical position.
U.S. Pat. No. 5,174,685 discloses a flexible pipe laying and covering apparatus. This apparatus lays the flexible pipe in a trench embedding it within a bed of gravel in a single operation. A gravel hopper, a guide sleeve, and a skid or sled allows the apparatus to be dragged through the trench, lay the pipe, and fill around the pipe with gravel. The apparatus permits pipe to be laid without requiring personnel to be located within the trench thus avoiding the increased costs required by OSHA regulations for tapering the trench walls or bracing them to avoid cave-in.
U.S. Pat. No. 4,397,585 discloses an apparatus for inserting foldable conduit below ground. A plow forms a cavity in the ground for receiving conduit and the conduit is conveyed through a feeder from a conduit reel of some sort. As the conduit passes through the feeder the conduit is unfolded. Soil lifted by the plow falls around the unfolded conduit constraining it to its unfolded configuration.
U.S. Pat. No. 4,812,078 discloses a mechanized unit for digging a trench and laying elongated objects, the mechanized unit has a motorized vehicle, a digging wheel connected to the rear of the vehicle, a conduit device for holding the coiling conduit at the front of the vehicle, a guide device for laying the conduit in the trench, a soil shoot of some sort for laying the conduit in the bottom of the trench and covering the conduit with the soil.
U.S. Pat. No. 4,825,569 discloses a trench digging, cable laying and trench filling apparatus, the apparatus uses a safety shield to direct the previously excavated dirt back into the trench, the apparatus has a cable laying device which lays the cable in the trench before refilling the trench with dirt, a spool of cable supported on a rod and the cable is fed into the open trench ahead of the loose dirt which is then covered by the loose dirt.
U.S. Pat. No. 5,743,675 discloses an underground cable anode installment system. The system has a plow which creates a tunnel, conduit is delivered into the tunnel, a shoot feeds the conduit into the tunnel, also a coke breeze can be delivered to the tunnel by passing it over the nonmetallic inner surface of the shoot to provide for horizontal encasement of the anode cable.
U.S. Pat. No. 5,913,638 discloses a sand channel trenching and pipe laying apparatus. The apparatus is connected to a motor driven vehicle which has an elongated frame with a turf cutting assembly which includes a couple of vertical cutting blades for removing a strip of turf. A pipe dispenser for laying in position the pipe in the channel is secured to the sub frame mounted on the rearward portion of the frame. A sand funnel is linked to a sand hopper and mounted on the same sub frame as the pipe layer. Sand is forced through the shoot into the trench. The sand covers the pipe and fills the trench.
U.S. Pat. No. 6,478,508 discloses an apparatus for laying underground electric cables, where a vehicle is towed along a trench and carries a van and a depositing unit which forms the base layer of an inner material for heat dissipation at the bottom of the trench upon which high-voltage lines are carried. The second van carries a second depositing unit which forms the cover of the inert material above the cable and the first layer.
U.S. Pat. No. 6,622,403 discloses a backfill and grading apparatus. The apparatus deposits material within the trench. The apparatus has a hopper and an elongated shoot which extends down from the hopper into the trench. The apparatus has a gate between the hopper and the shoot for controlling material flow out of the hopper, through the shoot and into the trench. The apparatus is mounted on the back of a trailer with a variably positionable mount and includes a laser guided control system to maintain the deposit material at the predetermined grade.
Referring to Col. 3 around line 33, in an exemplary embodiment, the apparatus is coupled to a tractor by a hydraulic mount that variably positions the apparatus up and down along a substantially vertical axis with respect to the tractor. The hydraulic mount has a control element that controls the vertical position of the apparatus response to input signals from the operator. Thus the position of the apparatus can be made subject to automatic control of the operation of control element in connection with or as part of an automatic control system. Referring to Col. 4 at line 27, an operator digs a trench and bedding is installed in the trench. Pipe is then installed in the trench and placed on the bedding and then covered to the predetermined grade with the appropriate material.
U.S. Pat. No. 6,854,931 discloses an apparatus for establishing adjustable depth bed soil in trenches for utility lines and encasing the lines. The unit places a predetermined and adjustable depth of selected bedding material on the bottom of the trench in the ground, then places on the bed a continuous length of utility line having a predetermined spatial relationship with each other and then encases utilities with additional select material to a predetermined and adjustable depth in a continuous operation. A single hopper is used to form the bed for both utility lines. An adjustable height blade is provided which both sets the blade height and also smooths the bed surface for each utility line.
Trenchers
U.S. Pat. No. 6,708,430 discloses a trencher for digging trenches, referring to the summary of the invention section in column one around line 52, “one aspect of this invention relates to a trencher for digging trenches. The trencher comprises a trencher frame. A chain bar is secured at one end to the trencher frame to extend outwardly from the trencher frame in a cantilever manner. An endless chain having digging teeth is provided with the endless chain being carried on the chain bar. The chain bar comprises a base member secured to the trencher frame which base member carries a stub having a longitudinal axis, an elongated boom having a socket at one end which socket is slipped over the stub of the base member, a slot in the stub with the slot extending parallel to the longitudinal axis of the stub, and at least one bolt passing through the boom and the slot to secure the boom to the stub.”
U.S. Pat. No. 7,096,609 discloses a trencher unit, referring to the brief description of the invention in column one around line 43, “The trencher unit of the present invention is a unit that can be mounted to a standard attachment plate of a loader such as a typical skid steer loader. The trencher unit relies on the auxiliary hydraulic power of a loader and can be operated in an upright orientation to dig curved trench sections. The trencher unit includes a support frame having an attachment fitting at its proximate end for mounting to the attachment plate of a loader. A chain drive sprocket is rotatably mounted to the support frame near the proximate end of the support frame. An idler wheel is mounted to the support frame at the distal end of the support frame. The chain drive sprocket and the idler wheel carry an endless digging chain which presents a series of digging teeth. A hydraulic chain drive motor for driving the chain drive sprocket and the digging chain is mounted to the support frame. Auxiliary hydraulic lines which communicate with the loader hydraulic system supply the hydraulic chain drive motor with pressurized hydraulic fluid. An auger assembly situated on the support frame between the drive sprocket and the idler wheel includes augers for pushing dirt away from the digging chain.”
U.S. Pat. No. 6,249,983 discloses a trencher assembly utilizing a direct drive motor, referring to the disclosure of the invention section in column 2 around line 1, “In one aspect of the present invention, a trencher assembly comprises a frame. A boom arm is connected on the frame. A motor is connected on the frame and has a rotatable shaft. A sprocket is connected on the shaft of the motor. The sprocket is directly driven by the motor through the rotation of the shaft. A digging chain is connected between the boom arm and the sprocket and is driven by the rotation of the sprocket. An auger assembly is connected to the sprocket for rotation therewith in unison with the digging chain.”
Generally speaking, this is a trencher assembly which includes a trencher and loader, the loader enables the trencher assembly 10 to be operated along various types of ground engaging trench digging locations which may require the laying of various types of utility pipe. For example, the utility pipe may be a drainage pipe with perforated holes requiring the trench itself to be dug at a constant grade, and width regardless of the upper surface grade variations. Furthermore, many times the grade itself is in a pre-conditioned state, for example sports fields, golf courses, parks, and other landscaped locations which require low pressure distribution at construction for example a minimum of 15 psi of load placed on the surrounding ground by the equipment providing the trench may be a tolerable limit to not permanently degrade the surface.
Various limitations may be made on the trench itself. For example: a width range of 3 inches to 12 inches corresponding to a depth range which varies depending upon the non-pervious soil locations. The depth ranges from approximately 6 inches to proximately 60 inches or 80 inches or more depending on the upper surface grade variations and the desired flow.
Referring to
The trencher is configured with a front profile width which enables the operator to have various sightlines 26 above or laterally from side to side of the trencher 12 for safety as well as alignment requirements. In the present embodiment as seen in
In this particular embodiment, the trencher 12 is connected to the front loader plate 19 of the skid steer 14 through the use of a removable front loader plate attachment 18. In this particular embodiment, along the forward surface of the removable front loader plate 18, is attached an articulating member 16 having a pivot couple 100 connected to the removable front loader plate 18 and the articulating member 16. The articulating member 16 is pivitably attached to an articulating member hydraulic 22. The articulating member hydraulic 22 is located above the articulating member 16 and attached to the top couple 102 and a member midpoint couple 104. This angularly aligned hydraulic 22 provides for the leverage arm to position the trencher 12 in various trench engaging arrangements such as a non-ground engaging position, a ground engaging position, and a trench engaging position. Furthermore, during the non-ground engaging position, when the trencher is placed in position within the trenching position/location on the ground surface, the weight of the trencher 12 applies a greater specified load to the skid steer wheels so additional load pressure distribution may be required through the use of larger wheel's or a track system etc. . . .
A detailed discussion of the various components of the trencher assembly 10 will now be provided. Still referring to
Referring to
While the present trencher spoils remover 30 is located at the fore portion of the trencher, the conveyor 30 may be arranged at the rear portion of the trencher to receive soils as they pass behind the trencher system.
Referring to
As mentioned previously, the trenching blade 58 can move about a partial radial axis along the radial blade sleeve 43 which enables circumferential travel of the trenching blade 58 and its centrally aligned blade axle 32 (
Prior to digging, the trenching blade 58 is raised up in its non-engaging position 58. The operator will first actuate the blade controller 90 in order to start the hydraulic motors 13 and begin to rotate the trenching blade 58 about the axle 31. In doing so, the radially aligned circumferentially spaced trench blade tools 54 rotate about the circumference of the trenching blade 58.
Once the proper revolutions per minute or RPM's have been reached, the operator can then lower the trenching blade 58 onto the ground engaging surface and began digging the trench. In order to do so, the operator engages the articulating member control 88 and begins to lower the articulating member 16 and the attached trenching blade 58 to the point where the trench blade tools 54 begin to dig into the ground engaging location. Because of the weight of the trenching blade itself, which in one embodiment is 2,500 pounds, the trenching blade will dig into the low weight bearing soil, which may be as little as 15 pounds per square inch load bearing capacity, and move the earth towards the debris collection location 49.
In profile, the radially aligned circumferentially spaced trench blade tools 54 are angled off-center from the vertical axis 34 to provide for digging at a depth and width of the trench. The trenching tools 54 are optionally adjustable to different positions to provide varying degrees of trench digging.
Referring to
The trenching tools 54 are orientated off-center from the centerline of the trenching blade 154 so that the tool axis 156 is vectored away from the centerline of the trenching blade at a tool axis angle 155. The trenching blade width 160 may be as narrow as 1.5″ or as wide as 6″ depending upon the required digging specifications.
The trenching tool 54 seen in
The tool 54 is rigidly connected to the tool blade outer wall 174 by a tool base 176 which is a rigid steel plate approximately ¼″ to ½″ in width and is fully welded all round top and bottom to both the tool main body 164 and the trenching blade outer wall 174.
The current embodiment provides for a solid metal trench blade 58 with a diameter which may range from approximately 24 inches to approximately 90 inches or more in diameter depending upon the desired trench depth, weight of the trenching blade 58, and pressure of use of the hydraulic arms 22 and 23 to drive the trench into the ground engaging location. The trench blade 58 may be, in alternative embodiments, elliptical in profile, rectilinear in profile, or any other nonsymmetrical profile such as an off centered pie shaped blade or other configurations depending upon desired use and digging procedures. The sizes of the trenching blade correspond proportionally to the weights of the blade. For example, the trenching blade 58 may have a weight range of approximately 250 pounds to approximately 4,750 pounds with the present embodiment being around 2,000 pounds to 2,500 pounds. As mentioned, the weight of the blade in the trencher may be a function of the skid steer ground engaging wheels or track which provides proper load bearing pressure pounds per square inch to meet the preconditioned turf specifications.
The non-trench engaging position 45 or in other words the ground engaging position 45 of the trench hood, includes the radially aligned articulating member 16 which is aligned along the radial axis 50. This alignment enables the operator to move the trenching blade as previously discussed, into the trench engaging position 72 as seen in
For example, the land owner's specifications may require only a weight distribution of 15 pounds per square inch due to the finished grade being a working golf course, working athletic field, or other unmissable field with low soil weight capacity. To determine the proper grade elevation, the depth gauge 25 may be connected to a GPS or laser level or other survey equipment, and enable the operator to adjust the depth of the trenching blade 58 for proper slope orientation.
To catch the ground spoils since the ground is dug by the trencher, the trencher blade tools 54 kicks the spoils forward which are deposited into a debris collection location 49 located at the fore end of the trencher unit 12. The trencher blade tools continue rotating and some of the spoils are carried through the shield envelope but a majority of the spoils are collected at the debris collection location 49. The spoils are then deposited onto the conveyor belt 31 of the spoils conveyor 30 by being lifted out of the debris collection location 49 and onto the conveyor belt 31 or in other words, a never ending lift, through the use of conveyor shelves 33 which protrude into the debris collection location space 49 to grab the debris as it is deposited into the collection location.
To make the trench smooth and free of debris, a trench shoe 56 is provided to scrape the bottom of the trench. In this particular embodiment, the trench shoe 56 is aligned along an elliptical curve and is threaded between a plurality of rotation joints which enable the hydraulically driven shoe 56 to be actuated from a ground engaging position to a non-ground engaging position through the use of a shoe hydraulic 24. Once the spoils are cleared from the trench digging location, the spoils rotate to the debris collection location 49 for removal by the spoils conveyor 30. As stated above, the debris is then deposited from the spoils conveyor 30 onto a collection truck or spoiler hopper.
After the trench 114 has been dug as seen in
The backfill hopper 110 is constructed to support the pipe carriage 104 which carries the corrugated drainage pipe 102. The pipe carriage stays 108, are arranged vertically to support the cantilevering of the pipe carriage 104 enabling it to rotate about the cantilevered arm 103. The purpose is to enable the corrugated drainage pipe 102 to be continuously fed through a guide sleeve 116 which travels along the trench 114 and has a horizontal exit sleeve 119 enabling the corrugated drainage pipe 102 to be continuously fed at a constant riser height 117 which meets the elevational requirements of the corrugated drainage pipe 102 for proper drainage of the trench. During the placement of the corrugated drainage pipe 102, the trench is continuously filled with backfill 112 which creates a soil envelope about the corrugated drainage pipe while encasing the pipe at the constant riser height 117 position. The continuous riser height elevation parallels the bottom grade of the trench 114. The guide sleeve 116 is maintained in a central position within the trench 114 through the use of a trench guide 118 which is positioned along the central line profile of the trench and provides for consistent steering along the trench while the skid steer 14 drives the hopper 110 from the aft end.
To ensure that the corrugated drainage pipe 102 will be placed at the constant riser height 117 parallel with the bottom grade of the trench 114, the hopper 110 and the guide sleeve 116 are each allowed to adjust vertically with the change of the above grade line elevation 115 through the use of a riser grade adjustment 122 attached to the hopper fore end wall 130 and the guide sleeve 116, and a hopper grade adjustment 124 which is attached to the front loader plate 19 and the hopper aft end wall 132. The hopper grade adjustment 124 enables the aft end of the hopper to avoid vertical movements from the skid steer 14 but to still receive the horizontal force to drive the hopper along the path of the trench. The hopper grade adjustment 124 has a front loader hinge 136 and a hopper hinge 138 spanned by a rigid connecting member to provide for the transfer of compressive forces from the skid steer to the hopper.
The riser grade adjustment 122 has a fore end hopper hinge 140 which is pivotably connected to riser grade adjustment bars which are pivotably connected to sleeve hinges 142 mounted on the side wall of the guide sleeve 116. Furthermore, the guide sleeve 116 travels through the trench guide 118 while the trench guide 118 is rigidly connected to the hopper fore end wall 130. The backfill soil must be provided into the inner region of the hopper 110 and must continuously fall through the backfill sleeve 126 which is arranged along the full longitudinal length of the backfill hopper. The backfill sleeve 126 is approximately the same width as the trench 114 which provides for consistent filling of the trench. The hopper has angled sidewalls 134 which each taper to the narrow backfill sleeve width 126. There is a full opening with an absence of a top wall providing a top wall edge 113 which makes the top edges of the fore and aft end walls and the two angled sidewalls. A soils baffle 111 provides for additional retention of the soil as it is thrown into the hopper 110.
The backfill hopper travels on plurality of four wheels 144 which are each individually connected to the sidewalls 134 through the use of axle boxes 144 which provide for the proper alignment and cantilevering of the wheel axles 150 to support the wheels 144. The reasoning for a non-continuous axle to support two wheels is because the backfill sleeve 126 requires a continuous travel along the entire longitudinal length of the hopper.
A detailed discussion of the method for trenching and drain installation will now be provided. Referring now to
The operator of the trenching unit will lower the trenching unit to a ground engaging location at step 204 and the operator will first engage a trenching hood controller which is located in the operating portion of the skid steer, and move the trenching unit by utilizing the hydraulic power source operated under the hydraulic controller, to actuate the trenching hood controller and move the skid steer front loader plate onto the ground engaging location and in-line with the trenching profile.
The operator will then engage the trenching unit has seen in step 206, by actuating a blade controller which is located on the hydraulic controller of the trenching unit. Thus hydraulic pressure is applied to the hydraulic motor which is attached to the articulating member and the trenching blade. The trenching blade begins to rotate about the centrally aligned axle or axis in preparation of digging the trench.
The operator will then begin to dig the trench at step 208 along the trenching profile. In order to do this, the user must actuate the articulating member controller, located on the hydraulic controls, which then actuates the articulating member about a hinge or pivot point which is located on or near the front loader plate. This is accomplished by asserting hydraulic pressure onto the articulating member through the use of the articulating member hydraulic 22 as seen in
Once the digging has begun, the operator can lower a trenching shoe into the trench at step 210. This step requires the operator to actuate the trench shoe controller, which then asserts a hydraulic pressure onto the trenching shoe through the use of the trench shoe hydraulic 24 seen in
As the trenching is occurring, the operator can also remove the debris at step 212 when the debris is pushed into the debris collection location by the trenching blade (this generally happens automatically with the rotation of the trenching blade forcing the soil into the collection location.) The soil is removed from the collection location by utilizing the spoils conveyor. The spoils conveyor has a hydraulically driven conveyor belt which utilizes a never-ending series of spoils shelves, which scoop out or lift out the debris or spoils from the debris collection location and away from the trenching unit. The spoils are then deposited as previously discussed, onto a spoils hopper for removal from the site or reinstallation back into the trench after the pipe is laid.
Lastly, the operator can attach the skid steer to the backfill hopper 110 as seen in
This application claims priority benefit of U.S. Ser. No. 61/045,594 filed Apr. 16, 2008.
| Number | Date | Country | |
|---|---|---|---|
| 61045594 | Apr 2008 | US |
