Title:
Piling attachment for hydraulic vibratory compactor
Kind Code:
A1


Abstract:
The invention of a hydraulic clamp which attaches to an excavator mounted vibratory compactor for installing and removing piling. The invention is composed of a clamp which attaches to the bottom of the vibratory compactor, a valve body for maintaining the grip and center mount adapters which fasten to the top of the vibratory compactor.



Inventors:
Charles Bowman, William (Detroit, MI, US)
Application Number:
10/260685
Publication Date:
08/14/2003
Filing Date:
10/15/2001
Assignee:
CHARLES BOWMAN WILLIAM
Primary Class:
International Classes:
E02F3/96; (IPC1-7): E02F3/96
View Patent Images:
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Primary Examiner:
PECHHOLD, ALEXANDRA K
Attorney, Agent or Firm:
William Charles Bowman (Detroit, MI, US)
Claims:

The present invention is to provide an attachment to existing excavator mounted hydraulic vibratory compactors. This attachment will create a solid connection between the vibratory place of the excavator mounted hydraulic vibratory compactor and the driven element. there are 2 claims for this patent application:



1. A modification of the attachment section of the existing hydraulic compactors from a two pin attaching method to a single pin attaching method.

2. The clamp plate which is bolted to the bottom of the hydraulic compactor which fastens to the driven element

3. The pilot activated full flow check valves which are introduced between the excavator and the hydraulic cylinder on the clamp plate as the prime method for holding pressure on the hydraulic cylinder of the clamp.

4. The addition of the accumulator to compensate for pressure loss as vibration is induced into the driven element. 1. Center Mount for Hydraulic Compactor: The center mounts placed on the excavator mounted hydraulic compactor corrects several problems in using excavator mounted hydraulic compactors for driving sheet piling: a: The center mounting allows the vibratory compactor to remain in alignment to the driven elements at all times by virtue of the single point pivot and thru the connection created by the clamp. This over comes many of the drawbacks of using excavators who's movements are in arc's. b. The use of the center point pivot frees up the use of the bucket cylinder circuit on the hydraulic excavator for use in applying the hydraulic pressure required for the actuation of the hydraulic clamp. 2. The Clamp Plate: The clamp plate which bolts to the base plate on the bottom of the hydraulic vibratory compactor is the actual work piece of the invention. This is the point which engages the element to be driven and acts as the conduit to transfer effectively the vibration into the driven element. a. The solid connection created by the hydraulic clamp allows the vibratory compactor to impart it's full energy into the driven element for both driving and extracting. b. The solid connection minimizes distortion into the top of the element being driven or extracted. c. The solid connection created by the hydraulic clamp creates a much safer method in that personnel are not required to attach or remove welds or manually installed fasteners for attaching the driven element to the vibratory compactor for either driving or extracting piling elements. 3. The pilot activated check valves: The pilot operated check valves in the hydraulic circuit create a positive stop for any pressure loss which may arise from leakage thru the spool valve in the bucket circuit in the hydraulic excavator on which the excavator mounted hydraulic vibratory compactor is mounted on. During the driving process, the priority flow of the system is directed towards the vibratory compactor. The use of the pilot activated check valves act as a further safety element in holding pressure in the event of any failures in the hydraulic system of the hydraulic excavator. 4. The Accumulator The introduction of the accumulator into the piling attachment for the hydraulic vibratory compactor serves several purposes and needs: a. As the vibratory force is applied to the driven element, in addition to the forces applied by the ram in the clamp itself, the driven element will deform to fit the contour of the clamp ram for the introduction of the vibratory forces after the clamp is actuated onto the driven element. The accumulator will compensate for any loss in pressure to the cylinder in the clamp assembly from any deformation induced by the vibration. As the priority flow of the hydraulic excavator will be directed towards energizing the vibratory compactor, the operator will not be able to maintain pressure on the clamp. This dictates the need for the accumulator. b. The accumulator further acts as another safety feature in that it will maintain positive force on the ram in the clamp plate until a definite action on the part of the excavator operator to release the pressure on the clamp.

Description:

FIELD OF INVENTION

[0001] The present invention relates to the construction industry. More specifically the installation and removal of sheet piling and other driven elements into the ground whether it be pipe piling, H columns.

PRIOR ART

[0002] The use of for excavator mounted hydraulic vibratory compactors is a common method for driving and extracting sheet piling. The use of the vibratory compactors although effective are quite inefficient in their delivery of the driving energy from the vibrator plate to the driven element. The use of the excavator mounted hydraulic vibratory compactors for extraction present a great deal of problems in their use. They are terribly inefficient in delivery of energy to extract the driven element without welding or otherwise making a solid connection from the vibratory driver plate to the driven element. The current method for attaching the excavator mounted hydraulic vibratory compactors to the base carrier is employed with the compactor mounted at two pin points on the dipper. One at the bucket pivot point and the other at the bucket cylinder point. This connection when driving elements creates twisting forces into the driven element unless constant corrections are made in the angle of the compactor on the dipper. No device is known which incorporates all the elements of the sheet piling clamp attachment for excavator mounted hydraulic vibratory compactors.

SUMMARY OF THE INVENTION

[0003] Claims:

[0004] The object of the present invention is to provide an attachment to existing excavator mounted hydraulic vibratory compactors. This attachment will create a solid connection between the vibratory plate of the excavator mounted hydraulic vibratory compactor and the driven element.

[0005] There are 4 claims to this patent application;

[0006] I. a modification of the attachment section of existing hydraulic compactors from a two pin attaching method to a single pin attaching method;

[0007] II. The clamp plate which is bolted to the bottom of the hydraulic compactor which fastens to sheet piling;

[0008] III. The Pilot activated full flow check valves which are introduced between the excavator and the hydraulic cylinder on the clamp plate as the prime method for holding pressure in the hydraulic cylinder.

[0009] IV. The addition of the accumulator to compensate for pressure loss as vibration is induced into the sheet to be driven or extracted.

I. Center Mount for Hydraulic Compactor

[0010] The center mounts placed on the excavator mounted hydraulic compactor corrects several problems in using excavator mounted hydraulic vibratory compactors for driving sheet piling:

[0011] a. The center mounting allows the vibratory compactor to remain in alignment to the driven element at all times by virtue of the single point pivot and thru the connection created by the clamp.

[0012] b. The use of the center point pivot frees up the use of the bucket cylinder circuit on the hydraulic excavator for use in applying the hydraulic pressure for the actuation of the hydraulic clamp.

II. The Clamp Plate

[0013] The clamp plate which bolts to the base plate on the bottom of the hydraulic vibratory compactor is the actual work piece of the invention. This is the point which engages the element to be driven and acts as the conduit to transfer effectively the vibration into the driven element.

[0014] a. The solid connection created by the hydraulic clamp allows the vibratory compactor in impart it's full energy into the driven element for both driving and extracting.

[0015] b. The solid connection minimized distortion into the top of the element being driven.

[0016] c. The solid connection created by the hydraulic clamp creates a much safer method in that personal are not required to attach or remove welds or manually installed fasteners for attaching the driven element to the vibratory compactor.

III. The Pilot Activated Check Valves

[0017] The pilot operated check valves in the hydraulic circuit create a positive sop for any pressure lose which may arise from leakage thru the spool valve in the buck circuit in the hydraulic excavator on which the excavator mounted hydraulic vibratory compactor is mounted on. During the driving process, the priority flow of the hydraulic system is directed towards the vibratory compactor. The use of the pilot activated check valves act as a further safety element in holding pressure in the event of any failures in the hydraulic system of the hydraulic excavator.

IV. The Accumulator

[0018] The introduction of the accumulator into the piling attachment for the hydraulic vibratory compactor serves several purposes and needs:

[0019] a. As vibratory force is applied to the driven element, in addition to the force applied by the ram in the clamp itself, the driven element will deform to fit the contour of the clamp ram. The accumulator will compensate for any loss in pressure to the hydraulic cylinder in the clamp assembly. As the priority flow of the hydraulic excavator will be directed towards energizing the vibratory compactor, the operator will not be able to maintain pressure on the clamp. This dictates the need for the accumulator.

[0020] b. The accumulator further acts as another safety feature in that it will maintain positive force on the ram in the clamp plate until a definite action on the part of the excavator operator to release pressure on the clamp.

BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG. 1:

[0022] This drawing shows the overall concept of the invention with the clamp attachment bolted to the bottom of the vibratory compactor and the installation of the center pin mounts on top of the vibratory compactor. The center mount pin plates (a) (further info see FIG. 5) are welded to the top of the existing mounting plates (B) on the vibratory compactor. This location will present no conflicts with the existing mounting method of the vibratory compact. The mounting of the hydraulic vibratory compactor in this center mount configuration will allow the vibratory compactor to remain plumb by virtue of the center mount. The clamp plate (C) is bolted to the bottom of the hydraulic vibratory compactor by drilling holes which correspond to the holes in the clamp plate and placing bolts thru them. The accumulator is mounted where possible, (E) on the hydraulic vibratory compactor, actual location is not a consideration. The check valves (d) also are located on the hydraulic vibratory compactor, again location is not critical so long as there are not conflicts with hydraulic hose routing.

[0023] FIG. 2:

[0024] This drawing provides a schematic of the hydraulic system employed by the clamp attachment. The use of the center mount pin in FIG. 1 removes the necessity to mount the vibratory driver to the bucket pin and frees up the use of this circuit for the application of the clamp functions. The pilot activated check valves will only allow movement of the clamp when there is positive pressure from the excavator for either engaging the clamp or for releasing the clamp. The accumulator below the check valves allows the hydraulic cylinder in the clamp mechanism to maintain positive pressure on the driven element to counteract any deflection in the driven element in the clamp jaws as vibration is induced by the vibratory compactor. The monitoring line is plumbed back to the cab of the excavator and attached to a gauge so that the operator can monitor the pressure on the clamp at all times;

[0025] FIG. 3:

[0026] FIG. 3 is a cross section of the clamp attachment. The major components are the base plate (B), the counterweight (A), the stationary jaw (C), the Jaw opening (C1), the ram or moveable jaw (D), the ram housing (D1), the hydraulic cylinder (E), and the cylinder housing (F).

[0027] The purpose of the components are as follows:

[0028] A). Counterweight helps maintain a center of gravity at the jaw opening

[0029] B). Base plate acts as a platform for the hydraulic cylinder and the jaws and provides the vehicle for fastening the clamp to the hydraulic vibratory compactor.

[0030] C). The stationary jaw acts as a point to restrain the driven element that is pushed by the ram(D)

[0031] C1). The Jaw opening, where the driven element is placed to be engaged by the ram;

[0032] D). The ram is the working part that engages the driven element

[0033] D1), The ram housing retains the ram against the baseplate,

[0034] D2). The hydraulic cylinder is attached to the ram by this threaded connector which is threaded into a female threaded opening in the rod of the hydraulic cylinder and is held to the ram by slots welded to the back of the ram

[0035] E). The hydraulic cylinder, creates the force to push the ram against the driven element.

[0036] F). The cylinder housing, acts to hold the hydraulic cylinder in place and also acts as a guard for the hydraulic cylinder.

[0037] FIG. 4:

[0038] FIG. 4 shows the same attributes as FIG. 3 except from a top view;

[0039] FIG. 5;

[0040] FIG. 5 shows the center mount plates (a) which are welded to the top of the hydraulic vibratory compactor. The hole (b) is cut to suit the pin diameter of the hydraulic excavator which the hydraulic vibratory compactor is mounted on;