US2146917A - Valve for abrading apparatus - Google Patents

Description

Feb. 14, 1939. w. A. ROSENBERGER VALVE FOR ABRADING APPARATUS Filed May 14, 1956 3 Sheets-Sheet 1 IVi/I/am A. Roan berqer' Feb. '14, 1939 W. A. ROSENBERG ER VALVE FOR ABRADING APPARATUS' Filed May 14. less 3 Sheets-Sheet 2 Patented Feb. 14, 1939 UNITED STATES PATENT: OFFICE VALVE FOR ABRADING APPARATUS William A. Rosenberger, Hagerstown, Md., as-

signor to Pangborn Corporation, Hagerstown. Md.., a corporation of Maryland Application May 14, 1936. Serial No. 19,701

16 Claims.

The present invention relates to abrading apparatus and is more particularly concerned with that type of abrading apparatus which is known in the art as a pressure blast tank machine.

In my Patent No, 2,025,247, granted December 24th, 1935, I have shown a pressure blast machine embodying a fiow control mechanism which has proven highly successful in practice and which makes it possible to accurately meter the amount of sand or other abrasive that will be mixed with the air blast and yetwhich does not involve any slidable valve parts. In that patent there is disclosed an abrasive valve comprising a deformable element and means are employed for placing the deformable element under any desired degree of compression, to thereby provide any desired size of abrasive, opening.

It is the purpose of the present invention to improve the construction shown in my patent and to provide the deformable valve with further novel control mechanisms which have been found. to be highly desirable in practice.

It is a primary object of the present invention to provide, for use in abrasive feed valves of the character embodying a deformable member, a control mechanism for placing the deformable member under any desired degree of compression and which is so designed that it maybe dropped completely away from the valve for the purpose of removing abrasive clogs without disturbing the predetermined setting of the pressure applied to the valve member.

It is a further object to provide abrading apparatus of the character embodying a pressure deformable abrasive valve member with a mechanism for placing the valve member under any desired degree of compression and a further means for applying sufiicient pressure, to completely close the valve member, the two mechanisms being so related that when the valve is closed and again opened, it will be subjected to the predetermined pressure setting.

Another object is to provide an abrading' apparatus having a deformable abrasive control valve member and means adapted to be set for placingthe valve member under a predetermined degree of compression and also having means for completely closing and means 'for completely opening the valve without disturbing the predetermined setting thereof.

Further objects of the invention will appear as the specification proceeds in connection with the annexed drawings, and from the appended claims.

In the drawings:

Figure 1 is a front elevational view of the control valve and mixing chamber assembly of the invention and illustrates a part of the blast tank in section.

Figure 2 is a. longitudinal sectional view of the valve and mixing chamber assembly shown in 5 Figure l and illustrates the auxiliary abrasive valve or check plate in operative position;

Figure 3 is a transverse sectional view taken substantially on the line 3-3 of Figure 1, but illustrates the parts as they appear when the check 10 plate is in inoperative position.

Figure 4 is a view similar to Figure 3, but illustrates the mixing chamber dropped away from the hopper assembly.

Figure 5 is a longitudinal fragmental sectional 15 view of the operating handle and plunger assembly shown in Figure 1.

Figure 6 is a side elevational view of the control mechanism and also illustrates the valve closing and valve adjusting mechanism mounted on the 20 upper part or the abrasive tank.

Figure 7 is a sectional view taken substantially on the line i----! of Figure 6, looking in the direction of the arrows. I a

With continued reference to the drawings, 25 wherein like reference characters have been employed to designate like parts throughout the several views thereof, and with particular reference to Figure 1, I have illustrated my invention as applied to a pressure blast tank A having legs i0. 30

Secured to the bottom portion of tank A in any suitable manner (not shown) is a hopper II, which defines the bottom of the tank. Rigidly -secured to hopper II by means of a weld or the like is a heavy flange I2, which supports the 35 valve and mixing chamber and the control apparatus.

Secured to flange i2, by means of nut. and bolt assemblies I3, is a body member B, and a suitable gasket is interposed between the parts to 40 prevent air and abrasive leakage. Body member B is provided with a vertical passage M which communicates with the interior of the hopper and which is intersected by a transverse passage i5, which is open at one .end to the atmosphere. 45 Communicating with the upper side of passage I5 is a slot-like passage l5a.

Passage i5 is adapted to be closed by a valve plate l6 having a gasket i1 and which is secured to body B by means of a pair of stud 50 and nut assemblies i8. Secured to the outer side of valve plate 16 is a check plate i9. As seen in Figure 2, nuts i8 may be loosened and the valve plate reversed and check plate 19 inserted in groove "a to close off the abrasive flow. a

This operation is performed prior to dropping the mixing chamber away from the apparatus, as will be presently described.

Body member B terminates in a cylindrical conduit 2| which defines an annular, downwardly facing clamping surface. The clamping surface of conduit 2| cooperates with a deformable valve that will now be described.

Secured to a pin 22 pivoted in a pair of ears 23 formed on body member B, is a yoke member 24. Yoke member 24 is of U-shape as seen in Figure 3 and forms a cradle for a mixing chamber member 25, which is provided with a plurality of lugs 26 for restraining the mixing chamber against endwise displacement in its yoke. Mixing chamber is mounted for vertical adjustment in yoke 24 by means of a screw 28 threaded into the yoke and which is adapted to be locked in place therein by means of a locknut 28.

The mixing chamber is provided with a vertical passage 3| and an intersecting horizontal passage 32. An air supply conduit 33 is fitted in one end of the mixing chamber in communication with passage 32, and an abrasive blast conduit 34 is secured in the other end of the mixing chamber.

The upper end of the mixing chamber is pro- :ricleci with an upwardly facing cylindrical socket 6 :n which a deformable apertured valve eleent 31 is disposed. The valve element or memb may be made of am suitable flexible matema but I have found that a good grade of rubber is entirely satisfactory. If desired, the valve may be mounted in a socket in portion 2| of the body member. when the valve is uncompressed it assumes the shape shown in Figure 4,. whereas when it is partially compressed it assumes the shape shown in Figure 3, wherein the crosssecticnal area has been considerably reduced. When placed under a suillclently high pressure "sis-e will completely close and shut off the SIVB.

Althon n I have shown the mixing chamber as being separate from the yoke, in order to make it easy to obtain ready access to the mixing chamber and for permitting rapid replacement thereof, it is to be understood that these parts may be integrally formed if desired. The mechanism I preferably employ for placing the valve member under compression will now be described.

Yoke 24 is provided with a projecting nose or cam part 4|. A pair of ears 42 formed on body B rotatably support a shaft member 43 which is cut away at its upper side to define a cam face 45, which cooperates with nose 4| of yoke 24 as seen in Figure 3. In Figure 3, rocking shaft 43 counter-clockwise will rock yoke 24 in a clockwise direction and further compress valve member 31, whereas rocking shaft 43 in the opposite direction will relieve the pressure in the valve member. Although yoke 24 and shaft 43 have been illustrated as Journalled upon the body member, they may be supported upon any other part of the apparatus if desired.

Shaft 43 is provided with an enlarged portion 46 having an internal cylindrical surface 41. Preferably integrally formed with shaft 43 is a handle member 48 having a bore 43. Journalled in portion 46' of shaft 43 is a clutch mem- -ber 5| having a slidably mounted plunger 52 disposed in a bore 53 therein and which is operable to enter bore 49 in handle 48 to lock the two parts together. A compression spring 55 urges plunger 52 towards locking position and the plunger is provided with a handle 56 for manually pulling the plunger out of bore 49. freeing the parts 46 and 5|. Secured in a square bore 58 in member 5| by means of a set screw 6| is a square shaft 62.

It is accordingly seen that valve member 31 may be compressed by rocking handle 48 in a counter-clockwise direction (see Figure 3) independently of shaft 62; and that the shaft 62 may be locked to the handle by means of plunger 52. Secured to shaft 62 by means of a set screw 63 is a cylindrical bearing member 64 which is journalled in an opening in aleg of tank A. Secured to the outer end of shaft 62, by means of set screw 66, is a short lever 61 which cooperates with a stop 68 secured to tank A in a manner to be hereinafter pointed out.

Pivotally secured to lever 61 by means of a pin 1| is a link member 12. The upper end of link member 12 is secured to an operating member 13 having a horizontal portion 14. Rotatably mounted in bearings 15 and 16, carried in a casting 11 secured to tank A, is a regulator shaft 18. Shaft 18 is freely journalled in bearings 15 and 16 and extends through member 14 and is provided with a threaded lower end 19 and a hand wheel 88 at its upper end. A cotter pin 85 or the like extends through shaft 18 and bears against the lower side of bearing for restraining shaft 18 against inadvertent removal from its bearings. A nut 82 is threaded on shaft 18 and is provided with a bifurcated portion 83 which straddles a vertically extending flange 84 provided on casting 11, so as to restrain nut 82 against rotation. It is accordingly apparent that rotating wheel 86 in one direction will thread nut 82 upwardly on shaft 18 and thereby lift member 14 and link 12; and rock lever 61 and shaft 52 anti-clockwise (Figure 6). Rocking shaft 62 in this manner, with the parts disposed in the position shown in Figure 5, results in rocking shaft 43 counter-clockwise (Figure 3) thereby rocking yoke 24 clockwise and comprising valve member 31. Rotating hand wheel in the opposite direction allows link |2 to move downwardly and relieve the compression in the valve member.

I have also provided means for fully closing I the valve and yet which is so designed that when it is operated to again open the valve, it will restore the original setting of the valve, 1. e., the original degree of compression in member 31. Journalled on a pin secured to member 13 is a cam roller 85. Roller 85 cooperates with a cam 86 which is carried by shaft 81 mounted in bearings 88. Secured to shaft 81 is a handle 83 and in the position shown in is in open position. 4

When the handle is rocked counter-clockwise into the dotted line position, cam 86 cooperates with roller 85 and lifts member 13 to fully close the valve. As seen in Figure 7, the parts are so dimensioned that a clearance is provided between roller 85 and cam 86 in the open position of the parts, so that hand wheel 80 may be operated to raise or lower member 13 to regulate the opening of the valve without interference from cam 86. It is also apparent that when the handle is operated to close the valve, member 14 merely slides upwardly on shaft 16, and that when handle 83 is returned to its full position (Figure 6) member 14 will slide downwardly around shaft 18 and again come to rest against the upper side of the nut 82 and thereby restore the original setting of the device.

Figure 6, the valve a predetermined degree of compression, and the other controls maybe operated to completely shut off the flow or to completely open the mixing chamber, and yet when the auxiliary controls are restored to their normal conditions the valve will return to the setting previously established by hand wheel 80 as the parts will come to rest with member 14 abutting the upper side of nut 82.

When a clog occurs in the mixing chamber, or if for any other reason it is desired to have access to the interior of the mixing chamber,

.check plate i9 is placed in the position shown in Figure 2 to cut off abrasive flow, handle 48 (Figure 1) is pushed downwardly a slight distance to relieve the pressure on plunger 52 and handle 56 is then pulled to the right to cause plunger 52 to disconnect shaft 43 from shaft 62. Handle 48 is then moved into the position indicated in Figure 4, which causes cam face 45 to release yoke 24, and the latter swings down by gravity and may then be moved into the position shown in that figure in order to get at passage M or to remove and replace valve member 31.

When yoke 24 is swung upwardly and locked in position by swinging handle 48 into the'position shown in Figure 3 and plunger 52 is snapped into vbore 49 to lock shafts 43 and 62 together, it is apparent that valve member 31 will be placed under the same degree of compression as existed before the mixing chamber was dropped in the manner just described because shaft 43, which controls the degree of compression has been restored to its original angular position.

Member 5i, together with plunger 52, accordingly, constitutes a positive clutch for selectively coupling shafts 43 and 62, and although I prefer to employ the clutch shown, it is to be understood that other forms of clutches may be used without departing from the spirit of the invention.

When the machine is initially started, handle 89 (Figure 6) is disposed in its dotted line or closed position to shut off the abrasive fiow. When pressure has been built up in the tank, handle 89 is moved into its full line position so as to open the valve and allow the abrasive to gravitate into the mixing chamber.

Hand wheel 80 may be operated as desired to either increase or decrease the rate of abrasive flow; The parts are preferably so dimensioned that when hand wheel 80 has been rotated sufli- 24', for instance, to compensate for valves of different thicknesses or to calibrate the machine,

cific forms without departing from the spirit or essential characteristics thereof. The present embodiment is therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended tube. embraced therein. 7

What is claimed and desired to be secured by United States Letters Patent is:

1. In an abrading apparatus, a valve, a valve controlling member movable from a valve opening position to avalve closing position, a regulating device, a train of elements interconnecting said valve controlling member and said regulating device, whereby the latter may selectively hold said valve controlling member in a plurality of different set positions intermediate said valve opening and valve closing positions, said train of elements including a selectively operable clutch for disv connecting said valve controlling member from said regulating device, said valve controlling member having a part which may be manually operated to bring it into valve opening position, said clutch being operable to connect said elements in only one angular relationship, whereby when it is operated to connect said elements it will maintain said valve controlling member in a predetermined position with respect to said regulating device.

2. The apparatus described in claim 1, wherein said train of elements includes means operable in one direction to move said valve controlling member into valve closing position and operable in the opposite direction to restore said valve controlling member to the position in which it was maintained a by said regulating device.

3. For use with an abrading apparatus having a body member providing apassage terminating in a downwardly facing clamping face and a hollow mixing chamber having a clamping face and mounted for rocking movement toward and away from the clamping face of said body member, an apertured deformable valve element being dis posed between said clamping faces and adapted to be placed under various degrees of compression, means for holding said mixing chamber in operative position and for rocking it toward and away from said body member, comprising a cam.

member journalled for rocking movement adjacent said body member and cooperating with a cam projection provided on said mixing chamber.

4. The apparatus described in claim 3g, wherein said mixing chamber and said cam member are rockable about substantially parallel axes located on opposite sides of said body member."

5. The apparatus described in claim 3, together with a shaft member mounted for rocking move- .ment adjacent said cam member and having means for selectively holding it in various angular positions, and releasable coupling means for connecting said shaft member to said cam member. 6. The apparatus described in claim 3, wherein means are provided for adjusting said mixing chamber with respect to its pivotal axis.

'I. In combination with a body member having a passage therein and a valve associated therewith for metering the quantity of a fluid or other substance flowing through said passage, a valve controlling element, a cam member" mounted for rocking movement adjacent said body member and operable to move said element from a valveopening to a valve-closing position, a shaft memher journalled adjacent said cam member and having a .clutch for connecting it thereto, said clutch being operable to positively couple said cam member and said shaft in but one angular 8. The apparatus described in claim '1, wherein,

said cam member is provided with means for operating it independently of said shaft member when said clutch is released.

9. The apparatus described in claim 7, together with means for limiting movement of said shaft member toward valve opening position.

10. The apparatus described in claim '7, wherein said regulator means embodies means for allowing said shaft memberto be moved toward valve closing position independently of the normal regulating action of said regulator means, together with shut 01! means for moving said shaft toward valve closing position.

1l. In an abrading apparatus, a hollow body member providing a-downwardly extending spout portion, a yoke mounted for rocking movement adjacent said body member, a mixing chamber operatively disposed in said yoke and having a valve part mounted for cooperation with said spout portion of said body member to control the fluent flow when said yoke is rocked about its axis, means mounting said mixing chamber in said yoke for adjustment toward and away from said spout portion, and means for moving said yoke about its axis and selectively maintaining it in a plurality of adjusted positions, to thereby control the fluent flow through said body member.

12. For use with an abrading apparatus, having a body member providing a downwardly extending abrasive conduit defining a downwardly facing clamping surface and a mixing chamber mounted for rocking movement through an arc of considerable amplitude about a substantially horizontal axis adjacent said body member, said mixing chamber having an upwardly facing clamping surface and an apertured deformable valve being disposed between said clamping surfaces, an operating member mounted for rocking movement adjacent said body member, and means for interconnecting said mixing chamber and said operating member for causing said mixing chamber to deform said valve member when said operating 5 member is rocked through a comparatively small angle in one direction, and for freeing said mixing chamber and allowing it to drop down about its axis when said operating member is rocked through a comparatively large angle in the opposite direction.

13. The apparatus described in claim 12, wherein said operating member is mounted for rocking movement about a substantially horizontal axis and is provided with a part which is disposed in movement of said cam portion and allow said mixing chamber to drop away from said body member.

15. In an abrading apparatus, a valve actuating element, a valve controlling member cooperating with said valve actuating element and mounted for movement from a valve opening to a valve closing position, coupling means for connecting said valve controlling member to said valve actuating element, adjusting means for moving said member into, and maintainingthe same in any one of a plurality of set valve positions intermediate said valve opening and said valve closing positions, said adjusting means having a. oneway connection with said member for permitting the latter to be moved toward valve closing position independently of the action of said adjusting means, and cut-off means, acting independently of said adjusting means, for moving said member into valve closing position, said coupling means being releasable to allow said valve actuating element to move into valve opening position independently of said valve controlling member and said cut-oil means.

16. The apparatus described in claim 15, wherein said valve controlling member is provided with an abutment face and said adjusting means comprises a threaded element engageable with said abutment face and operable to hold said member against movement toward valve opening direc-v tion in any desired position intermediate valve opening and valve closing positions, and wherein said cut-off means comprises a lever rockable into engagement with said valve controlling member and operable to move the latter away from said threaded element.

WM. A, ROSENBERGER.

CERTIFICATE OF CORRECTION.

4 Patent lio 2,1li6 917 February 1b,, 1939.

WILLIAM A. ROSENBERGER.

It is hereby certified that error appears in the printed specification of the above numberedpatent requiring correction as follows: Page i first column, 111101 8, claim 12, after the word "valve" insert member; and that the said Letters Patent should be read with this correction therein-that the same my conform to the record of the case in the Patent Office,

Signed and sealed this 28th day of liarch, A. n. 19 9'.

(Seal) Henry Van Arsdale Acting Commissioner of Patents.

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