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Publication numberUS3180625 A
Publication typeGrant
Publication dateApr 27, 1965
Filing dateJul 23, 1963
Priority dateJul 23, 1963
Publication numberUS 3180625 A, US 3180625A, US-A-3180625, US3180625 A, US3180625A
InventorsAndrew Wyzenbeek
Original AssigneeWyco Tool Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Power transmission means for concrete vibrator
US 3180625 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

April 27, 1965 A. wYzr-:NBEEK 3,130,625

POWER TRANSMISSION MEANSFOR CONCRETE VIBRATOR Filed July 23, 1963 (2591 5' l INVENTOIL UnitedStates Patent O 3,186,625 PWER TRANSMISSION MEANS FR CONCRETE VlBFtAIOR Andrew Wyzenheek, Chicago, Ill., assigner to Wyco Tool Co., a corporation of illinois Filed July 23, 1963, Ser. No. 296,951 4 Claims. (Cl. 259-1) This invention relates to a power transmission means for a concrete vibrator and, more particularly, to a flexible shaft for interconnecting the prime mover with the vibrator head of such a vibrator.

Although vibrators have long been used for compacting concrete, the operation has been llimited by the ability of the conventionally employed flexible shaft to deliver adequate power to the vibrator head over the required periods of time. The flexible shaft is usually arched or looped, depending upon the position of the operator, and thus develops a varying frictional resistance between the interior bearing and the rotating core. It is an object of this invention to provide a superior power connection between the motor and the vibrator head, particularly o-ne which overcomes the heretofore-tolerated limitations in operation of such a connection.

Another object of the invention is to provide a unique interior bearing made up of a spirally wound ribbon of metal wherein the ribbon is longitudinally deformed to vminimize frictional resistance.

Other objects and advantages of the invention may be seen in the details of construction and operation set down in this specification.

The invention is described in conjunction with an illustrative embodiment in the accompanying drawing, in which-- FIG. 1 is a perspective View of a vibrator embodying the invention, seen in a typical environment;

FIG. 2 is a longitudinal sectional view, on enlarged scale, of the ilexible shaft portion of FIG. 1;

FIG. 3 is a fragmentary elevational view, partially in section, of a portion of the ilexible shaft and vibrator head seen in FIG. 1; and

FIG. 4 is a transverse section through the flexible shaft as taken on the line 4 4 of FIG. 2.

Referring now to FIG. 1, the symbol O designates generally the operator of the vibrator generally designated lll. The vibrator is seen to include a head 11 in the process of being immersed in a concrete member C and which is driven in conventional fashion by a portab-le motor 12 .coupled to the vibrator head 11 by means of the flexible shaft 13. The shaft 13, as seen in FIGS. 2-4, includes an elongated core 14 terminating in a hexagon-shaped fitting 15 (designated only in FIG. 3). The core 14 is solder-connected Within a reamed portion 15a in the tting 15 so as to be slidably received within a hexagonally-shaped sleeve 16 provided as part of the vibrator head 11. The vibrator head 11 also includes the eccentrically mounted rotor 17 seen in FIG. 3. The vibrator head details can be seen in my earlier Patent No. 3,042,386.

The iiexible shaft 13 includes an outer casing 13 constructed of rubber which enoloses the core 14- and provides a mounting for a spirally wound bearing generally designated 19. The bearing 19 is seen to be longitudinally deformed along a central line to provide a rib 20 contacting the rotating core 14. Additionally, the hearing strip 19 may be folded along its edges as at 21 and 22 to develop anchoring or gripping portions which are partially embedded within the casing reinforcement 23.

The inventive bearing or liner 19 was tested using a Wyco #991-G-1O vibrator wherein a temperature CII lsensing element was located at live inches from the end of the shaft, i.e., the position designated T in FIG. 3. For purposes of comparison, an identical vibrator was employed with the exception that the ribbon providing the bearing 19 was llat instead of beaded as shown. Testing of the two vibrators was made under the extreme condition of running the head completely out of concrete.

With the beaded-type inner liner 19 shown, the :temperature rose in ten minutes from 78 to 167 F., while with the flat inner liner the temperature rose in nine minutes from 78 -to 245 F., whereupon the test had to be stopped due to failure of the shaft.

In each case, the inner liners were constructed of Phosphor bronze having an analysis of -95% copper and 5-10% tin. The tensile strength in the hard drawn oondition was 55,000 p.s.i., the Brinell hardness 88-96, and the melting-point 1661 F. The inner liner in the beaded construction shown had a thickness of 1,434, while the dat inner liner had a thickness of l/gg, both inner liners being spirally wound on a pitch of 2".

During the test, there was a noticeable difference in the run-in time of the llexible shafts. With the beaded inner liner shown, the core became seatedin the casing much faster, as a consequence of which the vibrator came up to speed quicker.

As seen in FIG. 2, which is approximately full scale, the rib 2i) upstands from the ribbon 19 about the thickness o-f the ribbon. The ribbon 19 bears lagainst the reinforcement 23, which may take the interlocked form shown.

The edge folded construction as at 21 and 22 is exaggerated in FIG. 2 and norm-ally is developed to a certain extent in the operation wherein the longitudinally-extending bead 2d is imparted to the ribbon 19.

The rib or bead 20 on the bronze ribbon is exceedingly advantageous through its stiiening of the entire ribbon, causing the ribbon to expand with greater force when placed in the :casing so as to anchor the ribbon rmly in place, minimizing any play between the ribbon liner and the ilexible core lll. In contrast to this, the ordinary flat ribbon of bronze lhas a tendency to set and contract somewhat in use, thereby bringing about an indesirable tolerance or gap. Not only is the ilat form undesirable for this purpose, but the free movement of the ribbon inner liner brings about localized areas of stress, causing premature wear and failure.

While in the foregoing speciiication a detailed description of an embodiment of the invention has been set down for the purpose of explanation, many variations in the details herein given may be made Without departing from the spirit and scope of the invention.

I claim:

1. In a vibrator for comlpacting concrete, a motor, a vibrator head, and a flexible shaft coupling said head to said motor, said shaft comprising an outer casing, a flexible core, and a spirally wound liner disposed between said core and casing, said liner comprising a strip or" relatively thin material od uniform thickness deformed centrally of its width to define a longitudinally-extending, centrally disposed rib in contacting relation with said core.

2. The structure of claim 1 in which said liner along the longuitdinal edges thereof is deformed radially outwardly into anchoring engagement with said casing.

' 3. A flexible shaft for coupling a vibrator head to a motor for compacting concrete, and the like, comprising an outer casing, a flexible core, and a spirally wound caring liner disposed between said c'ore and casing, said liner comprising a strip of relatively .thin material of uniform thickness deformed inwardly along spaced 5 longitudinal lines to deveop a centrally disposed rib contacting said core;

4. The` flexible shait of'olaim 3 in which the stripis deformed radially ouwardly along its edges into anchoring engagement with the casing.

Roeremces Ced by the Examiner UNITED ST ATES PATENTS 1,678,335 7/28 Gaston 64-2 Webb l r FOREIGN PATENTS Germany.

1,865,874 6/32 Quamstmm 711-490 1o CHARLES A.W1LLMU,TH,1 rimry Examiner.

Patent Citations
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US1678335 *Feb 28, 1927Jul 24, 1928Mall Tool CompanyFlexible shaft
US1863874 *Feb 15, 1930Jun 21, 1932Bundy Tubing CoTubular control
US1905197 *Feb 6, 1929Apr 25, 1933Ac Spark Plug CoFlexible cable
US2148765 *Apr 25, 1935Feb 28, 1939William Mall ArthurMass and form vibrator
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US2204007 *Feb 13, 1939Jun 11, 1940William Baily RobertApparatus for multiphase vibration
US2443856 *Aug 29, 1944Jun 22, 1948Bendix Aviat CorpFlow measuring mechanism
DE954300C *Aug 10, 1952Dec 13, 1956Max Kammerer Kabelzugwerk G MUmhuellung fuer Bowdenzuege od. dgl.
Referenced by
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US3581523 *Feb 24, 1969Jun 1, 1971Merit Plastics IncFlexible cable assembly
US4073593 *Jul 12, 1976Feb 14, 1978Custom Trailers Mfg., Inc.Method and apparatus for providing a power screed board
US4384224 *Sep 21, 1981May 17, 1983Koehring CompanyDrive unit for flexshaft vibrators
US4664112 *Aug 12, 1985May 12, 1987Intravascular Surgical Instruments, Inc.Catheter based surgical methods and apparatus therefor
US4686982 *Jun 19, 1985Aug 18, 1987John NashSpiral wire bearing for rotating wire drive catheter
US4700705 *Oct 3, 1986Oct 20, 1987Intravascular Surgical Instruments, Inc.Catheter based surgical methods and apparatus therefor
US4838268 *Mar 7, 1988Jun 13, 1989Scimed Life Systems, Inc.Non-over-the wire balloon catheter
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U.S. Classification366/122, 415/122.1, 464/183, 464/174
International ClassificationE04G21/08, F16C1/06, E04G21/06, F16C1/00
Cooperative ClassificationE04G21/08, F16C1/06
European ClassificationE04G21/08, F16C1/06