Hydraulic and earth engineering – Subterranean waste disposal – containment – or treatment – Waste barrier – containment – or monitoring
Reexamination Certificate
2001-10-12
2003-07-15
Shackelford, Heather (Department: 3673)
Hydraulic and earth engineering
Subterranean waste disposal, containment, or treatment
Waste barrier, containment, or monitoring
C405S302700, C405S015000
Reexamination Certificate
active
06592295
ABSTRACT:
TECHNICAL FIELD
This present invention relates to an apparatus and method for controlling soil erosion and, in particular, an apparatus and method for installing erosion control blankets.
BACKGROUND
The banks of dunes, cliffs, sloping grounds, and other properties are subject to highly undesirable erosion. Due to the cycling of temperature, moisture, freezing and other conditions, the surface layers thereof typically are unstable and tend to creep downwardly in shear. Sooner or later their facings give rise to serious dislocations unless steps are taken to secure the unstable surface layers against erosion.
In order to prevent erosion and for both aesthetic and environmental protection reasons, it is often necessary or desirable to grow ground vegetation because the roots of vegetation planted along such properties tend to secure the unstable surface layers against erosion. The successful sprouting and growth of ground vegetation planted on these areas, however, is often prevented by the soil erosion which the planted vegetation is designed to inhibit, the erosion frequently carrying away at least some portion of the soil before the vegetation takes hold. Furthermore, adverse weather may inhibit the vegetation growing process. For example, in a storm the banks of such properties are subjected to powerful winds and rain that often carry away the facing soil, and with it, any vegetation rooted therein.
To alleviate this problem of eroding vegetation roots, it is now a common practice to lay erosion control blankets over grass seedlings. The protective covering most used is what is best termed a blanket or mat comprised of netting and underlying excelsior. One particularly effective erosion control blanket is the “Curlex” or excelsior blanket manufactured and sold by the American Excelsior Company of Arlington, Tex. since 1964. This erosion control blanket is fabricated, in elongated rectangular mat form, from elongated, randomly intertwined fiber commonly referred to as “excelsior” or “wood wool.” The fiber mats have historically been held together or contained by photodegradable netting material, which form nets on one or both sides of the fiber. The erosion control blanket assemblies are then conveniently packaged in individually rolled bundles to facilitate their handling and transport to the erosion control job site.
At the job site, the erosion control blanket bundles are unrolled in a side-to-side relationship along the earth area to be protected against erosion, and are secured along the sides of one another and to the underlying ground area with the use of a spaced series of conventional ground staple members, which may be made of steel, wood, plastic or starch. The installed erosion control blankets generally have parallel sides and abut one another to form a substantially solid surface to shield the underlying earth area, and thus the planted ground vegetation therein, from wind and rain erosion forces. The erosion control blanket must be fastened in place in the ground so that it will not be displaced from the desired location by weather effects such as rain, water runoff or wind.
To secure the erosion cloth, the usual practice has been to use a hammer which drives stakes or staples through the erosion control blanket into the ground at suitably spaced intervals to retain the erosion control blanket in place against weather effects such as wind, water and rain. However, not more than about 200 staples per hour can be inserted by a person using such methods and the user must be on his hands and knees or bent over to operate the hammer. Clearly, using a hammer to drive in stakes and staples is a slow and inefficient process and, furthermore, the large amount of physical work combined with the users' body positioning leads to a number of degenerative physical effects such as neck, back, knee, wrist and joint problems. Thus, devices for installing ground fasteners were created to more efficiently install the erosion control blanket fasteners and alleviate the amount of physical work a user must endure when installing these fasteners.
For example, U.S. Pat. No. 4,627,563 to Meyer discloses a device for driving U-shaped anchors downwardly so as to secure the blanket to the ground at selected locations. The device comprises a shoe having a sole plate that is adapted to engage the netting or other upper surface of whatever sheet-like material is to be anchored. The sole plate has a transverse slot through which a plunger is moved downwardly when a U-shaped anchor has been advanced into alignment beneath the plunger. The plunger is carried at the lower end of a reciprocal piston rod which has a piston at its upper end. By means of a foot-operable valve, compressed air is introduced into the upper end of the cylinder, thereby forcing the piston, the piston rod and the plunger downwardly so as to force an anchor into the ground.
In another example, U.S. Pat. No. 4,706,864 to Jacobsen et al. discloses a foot-operated machine for implanting fastener elements in the ground through an erosion cover on the ground. The machine has a hollow vertical column slidably receiving a vertically reciprocal driver connected to a foot pedal on the outside of the column. A post extends up from the column and carries a top cross piece with hand grips which a person may grasp while standing substantially erect with one foot on the foot pedal. A magazine assembly feeds fastener elements individually in succession into the column to be forced down into the ground when the driver is moved down by pushing the foot pedal down.
In still another example, U.S. Pat. No. 4,826,066 to Koester et al. discloses a staple insertion apparatus for sequentially inserting a plurality of staples through a selected material into the ground. A housing having a top, bottom, and sides, with first and second open ends, forms a chamber there between. The chamber is sized to receive a plurality of staples selected from four to 12 inches in length. The staples are inserted into the chamber from the second open end. A staple advancing member biases the staples towards the first open end. A vertically disposed tubular member is secured to the housing above the first open end of the chamber. An elongated drive member is slidably disposed at least partially within the tubular member. A staple retaining member positions the forwardmost staple beneath the elongated drive member. A foot actuation member is secured to the drive member. The drive member forcibly biases the forwardmost staple through the selected material, into the ground, when the operator exerts a downward force from a standing position upon the foot actuation member. As the operator's foot is raised, a biasing member disposed within the tubular member raises the drive member. The staple advancing member positions the next staple beneath the drive member for subsequent insertion of the next staple through the material, into the ground.
In yet another example, U.S. Pat. No. 5,025,969 Koester et al. discloses a dual actuation staple insertion apparatus for sequentially inserting a plurality of staples through a selected material into the ground when actuated by a downward force from an operator upon opposing handles, foot actuation member or both. The apparatus comprises a housing with a bottom, sides and a top forming a chamber there between, with open end portions. A tubular member is secured to the housing, and a drive means is slidably received in the tubular member. A biasing member is disposed upon the drive means above the tubing, and acts against a stop to raise the drive means to an upper operating position. A staple advancing means urges the plurality of staples into position beneath the drive means in preparation for the next staple insertion.
In order to install erosion control blankets, a user must roll the blankets over the ground. This type of installation requires the user to exert physical force in a bent over position which leads to back, neck and knee problems. After the erosion control blankets are installed, the blankets must then be fas
Fliesler Dubb Meyer & Lovejoy
Kreck John
Shackelford Heather
LandOfFree
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