Tool driving or impacting – With vehicle support for drive – Vehicle motor and drive motor powered by same energy source
Reexamination Certificate
2000-04-06
2001-10-23
Smith, Scott A. (Department: 3721)
Tool driving or impacting
With vehicle support for drive
Vehicle motor and drive motor powered by same energy source
C173S028000, C173S184000, C173S193000, C173S089000, C173S147000
Reexamination Certificate
active
06305480
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to a hydraulic hammer. More specifically, the invention is a machine for driving posts, drills, large spikes, and the like work pieces into the ground, pavements, or wall structures.
2. Description of Related Art
A number of practices and devices have been devised for driving posts, drills, large spikes, and similar work pieces into the ground, pavements, or wall structures.
For example, U.S. Pat. No. 4,050,526 issued on Sep. 27, 1977 and U.S. Pat. No. 4,124,081 issued on Nov. 7, 1978 to Deike generally disclose a portable hydraulic actuated machine for driving posts and the like work pieces into the ground, pavements, or wall structures. The machine includes an automotive vehicle which is easily transported to the work site and which carries a turntable supporting an upstanding tower on which rides a carriage slidably mounting a spring loaded heavy hammer, a work piece engaging spring loaded anvil struck by the hammer, and a hydraulic hammer lifting mechanism.
U.S. Pat. No. 4,263,975 issued on Apr. 28, 1981 to Dagnaud discloses a device for high-speed boring of stepped post-holes comprising a bearing sleeve, a support frame adapted to carry the bearing sleeve, a cylindrical cutter placed around a boring mandrel attached to the operating rod of a jack, and a means carried by the boring mandrel for removing the portion of soil which is trapped between the cylindrical cutter and the boring mandrel.
U.S. Pat. No. 4,382,475 issued on May 10, 1983 to Suzuki discloses a hydraulic hammering apparatus wherein an upwardly opened fluid chamber is accommodated in a vertically movable manner within a longitudinally cylinder having a weight holding portion formed on the upper part of its top plate. The back of the top plate of the cylinder is sealedly connected with the opening of the fluid chamber by means of a diaphragm.
U.S. Pat. No. 5,282,511 issued on Feb. 1, 1994 to Burenga et al. discloses a bearing block for use in providing a bearinged relationship between the carriage and reciprocal moving driving ram of a post driver. The carriage includes a pair of channel forming bearing surfaces between these two operating components so as to disseminate the impacting forces exerted through the bearings while the driving ram continuously pounds a fence or other post into the ground.
U.S. Pat. No. 5,291,955 issued on Mar. 8, 1994 to Clark discloses a self-contained hydraulic hammer which is capable of traveling in either forward or reverse directions and is provided with liftable weights to which a tool for digging or breaking up a surface is attached. The hydraulic hammer is equipped with time delay controls.
Great Britain Patent No. 1,098,644, published Jan. 10, 1968, discloses a piling equipment comprising an upwardly extending jib or boom non-adjustably fixed to a mobile vehicle and a piling mast connected to the boom for adjustment at will relatively thereto.
The prior art fails to teach a post driving and boring machine that enables an operator to simply, efficiently, and effectively extend the machine a sufficient distance away from a vehicle transporting the machine, operate the machine at several different angles, and operate the machine with a variety of attachment tools. None of the above inventions and patents, taken either singly or in combination, is seen to describe the instant invention as claimed.
SUMMARY OF THE INVENTION
A machine and a method of using the machine for driving posts, drills, large spikes, and the like similar pieces into the ground, pavements, or wall structures. The machine comprises an elongated tower, a carriage, means for attaching the carriage to the tower, a hammer, hydraulic means for raising and lowering the hammer, means for transporting hydraulic fluid, and means for controlling the flow of hydraulic fluid.
The elongated tower includes an upper end, a lower end, two parallel rails, a plate structure, and a carriage receiving structure. Each of the rails has a channel parallel to each of the corresponding rails, and the rails are positioned such that the channels of the rails face one another. The receiving structure has a top side, a front side, and a back side. The back side of the receiving structure has a receiving channel for receiving the carriage.
The carriage includes a first end, a second end, a universal joint, and a hollow cylinder for receiving the joint. The first end of the carriage attaches to a hydraulic means for raising and lowering the tower. The second end of the carriage slides into the receiving channel. The joint has a plate with three holes. The hollow cylinder receives the joint, and has a plate with three holes that is adapted to make contact with the plate of the joint.
The hammer has a top side, a bottom side, a front side, a back side, a first side, a second side, a chamber defined within the sides of the hammer, and sufficient rigidity and strength to exert a sufficient downward force on the work piece. Each of the first and second sides of the hammer has two roller bearings and a roller bearing guide for the hammer to slide within the rails of the tower.
The hydraulic means for raising and lowering the hammer is a combination of an elongated two-way cylinder and a pulley system. The elongated cylinder and pulley system combination reciprocates between a first position with the pulley being closest to the lower end of the tower, and a second position with the pulley being farthest from the lower end of the tower. When the combination is in the second position, the hammer is positioned about the upper end of the tower.
The machine may further include a hydraulic means for tilting the tower. The hydraulic means for tilting the tower is two two-way cylinders with each of the two-way cylinders having a first end, a second end, an inlet, and an outlet. Each of the two-way cylinders reciprocates between a first position with the second end of the corresponding two-way cylinder being farthest from the tower, a second, or neutral, position with the second end of the corresponding two-way cylinder being second farthest from the tower, and a third position with the second end of the corresponding two-way cylinder being closest to the tower.
The means for transporting hydraulic fluid are a plurality of hydraulic pressurized lines and a plurality of hydraulic conduits.
The means for controlling flow of hydraulic fluid are two control valve boxes. The first box includes two inlets, two outlets, a first lever for controlling fluid flow to a first two-way cylinder, and a second lever for controlling fluid flow to a second two-way cylinder. Each of the inlets of the first box is securely connected to an outlet of the corresponding two-way cylinder by a first or second hydraulic pressurized line. Each of the outlets of the first box is securely connected to an inlet of the corresponding two-way cylinder by a third or fourth hydraulic pressurized line.
The second box includes an inlet, an outlet, and a lever for controlling fluid flow to the elongated cylinder. The inlet of the second box is securely connected to the outlet of the elongated cylinder by a hydraulic pressurized line. The outlet of the second box is securely connected to the inlet of the elongated cylinder by a hydraulic pressurized line.
The machine may further include a dampening means between the hammer and the work piece, comprising a hammer guide. Wherein the hammer guide has a first side and a second side having two roller bearings for sliding within the channels of the rails. The machine may further include an interchangeable plate for attaching the work piece.
Accordingly, it is a principal object of the invention to provide a machine and a method of using the machine for driving posts, drills, large spikes, and the like work pieces into the ground, pavements, or wall structures.
It is another object of the invention to provide a machine for driving posts, drills, large spikes, and the like work pieces into the ground, pavements, or wall structures that may be extended a suf
Litman Richard C.
Smith Scott A.
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