US2029788A

US2029788A - Tank washing apparatus

Info

Publication number: US2029788A
Application number: US5600A
Authority: US
Inventors: Ostling William
Original assignee: PYRATE CORP
Current assignee: PYRATE Corp
Priority date: 1935-02-08
Filing date: 1935-02-08
Publication date: 1936-02-04
Anticipated expiration: 1953-02-04

Description

W. OSTLING TANK WASHING APPARATUS Filed Feb. 8, 1935 4 Sheets-Sheet 1 T 0 l n E m I Attorney w. sTLlN;

TANK WASHING APPARATUS Filed Feb. 8, 1935 4 Sheets-Sheet 2 Inventor i? VWIZzam OszZz'rzg #ig A;

Attorney W. OSTLING TANK WAS HING APPARATUS Filed Feb. 8, 1935 4 Sheets-Sheet 3 Attorney 4 Sheets-Sheet 4 W OSTLING TANK WASHING APPARATUS F'lled Feb 8, 1935 Feb. 4, 1936.

Inventor 'VVZZ Z z'cz m Ostlzng Attorney Patented Feb. 4, 1936 UNTED STATES 2,029,788 TANK WASHING APPARATUS William Ostling, Los Angeles, Calif., assignor to The Pyrate Corporation of Nevada, a corporation of Nevada Application February 8, 1935, Serial No. 5,600

18 Claims. (Cl. 299-68) This invention has to do in a general way with devices for cleaning tanks and the like, and it is more particularly related to improvements in devices of the general type disclosed in application Ser. No. 637,028, filed jointly by Clare Richard and Harold M. Ruth on October 10, 1932, application Ser. No, 672,927, led by Harold M. Ruth on May 26, 1933, and application SerfNo, 734,937 filed by Clare Richard on July 13, 1934, all of said applications being assigned to the assignee in .the present case.

The apparatus contemplated by this invention, like the devices disclosed in the three applications referred to above, is especially adapted for use in washing the tanks on tank cars and in oil tankers of their remaining contents subsequent to draining. The general construction of these devices embodies a stationary vertical feed pipe which is suspended through the top of the tank by suitable means positioned over the tank opening. This feed pipe carries, on its lower end, a rotatable secondary feed pipe or housing adapted to rotate about a vertical axis, such housing being provided with a nozzle member which is mounted for rotation about its substantially horizontal axis. Means are provided for rotating the nozzle member about its horizontal aXis during the passage of a washing fluid therethrough and additional means are provided for effecting a segmental step by step rotation of the housing which carries the nozzle member about its vertical axis during the rotation of the nozzle member.

It is an important feature of the device contemplated by this invention, like those of the other applications referred to above, that the housing is held stationary during a substantial period in the rotation of the nozzle member. Such period of rest in the housing is preferably suflicient to effect a complete cleaning action on a peripheral circle of the tank surface by the nozzle, before the housing is moved.

In cleaning the tanks on tank cars, the washing unit is ordinarily suspended in the center of the tank car, and, since the cars are much longer than they are wide, it will be apparent that a given angular increment of motion in the housing, while the nozzles are directed toward the ends of the car, will cover a much greater distance at the end of the stream than will be covered while the nozzles are directed toward the sides of the car. This invention, like those described above, therefore, contemplates means for varying the increment of angular movement in the housing during such times as thenozzles are directed towards the sides and towards the ends of the car, respectively,

The nozzle unit in this invention, like that disclosed in the Ruth application and the Richard application referred to above, is adapted tobe 5 driven by a liquid turbine mounted on the housing.

It is a primary object of this invention to produce a washing device of the class described which is provided with improved means for effecting the 10 segmental or step by step rotation of the housing upon the stationary feed pipe. In this connection, my invention contemplates means which are positively actuated from the nozzle member and which are enclosed to protect the mechanism from 15 the action of the washing fluid.

My invention further contemplates an improved means for varying the increment of rotation of the housing during the operation of the unit for the purpose and in the general manner 20 referred to above. In this same connection, my invention contemplates improved means for effecting an adjustment of the increments just referred to.

It is another important feature of this inven- 25 tion that I have improved the construction of the nozzle assembly which materially facilitates the dismantling of the unit for cleaning and inspection purposes and which is also designed to materially reduce the loss in velocity of the liquid as 30 it passes through the nozzle unit. A

It is a still further improved feature of this invention that I provide novel means for effecting lubrication of the turbine shaft, such means being substantially enclosed within the housing 35 unit so as to be afforded protection during the handling of the machine.

It is a still further object of this invention to provide a device of the class described which is of compact construction and in which the mov- 40 ing parts have a minimum of frictional loss.

Further, that all of the moving parts are substantially enclosed in suitable housings whereby the liability of damage due to handling or due to contact with the washing liquid is reduced to a minimum.

Details in the construction of a preferred form of my invention, together with other objects attending its production, will be best understood from the following description of the accompanying drawings, which are chosen for illustrative purposes only, and in which Figrl is an elevational view partly broken away and showing a preferred form of device contemplated by this invention as being suspended through the opening in the top of the tank;

Fig. 2 is a fragmentary elevation showing the side of the machine opposite to that which is illustrated in Fig. 1;

Fig. 3 is an enlarged sectional elevation taken in the plane represented by the line 3-3 of Fig. 2;

Fig'. 4 is a sectional elevation on the line 5 5 of Fig. 3;

Fig. 5 is a sectional elevation on the line 5-5 of Fig. 3;

Fig. 6 is a sectional elevation substantially along the line 5 5 of Fig. 3, parts in Fig. 6 having been shown in front of the section plane;

Fig. '7 is an inverted plan view which may be considered as having been taken substantially along the line I-'I of Fig. 3;

Fig. 8 is an enlarged sectional elevation along the line 5 5 of Fig. 2; and

Figs. 9 andY i0 are diagrammatic elevations with parts in section illustrating the operation of the means for controlling the increments yof movement of the housing on the stationary feed pipe.

More particularly describing the invention as herein illustrated, reference numeral I I indicates the top of the tank, or tank dome as the case may be, which is provided with an opening I2. Numeral I3 indicates a cover plate adapted to fit over the opening I2 and is held in place by any suitable locking means such as is indicated by reference numeral It. The cover plate I3 is provided with an opening I5 which receives and supports in any suitable manner what I may term a main feed pipe generally indicated by reference numeral I5.. The main feed pipe I5 is adapted to be suspended downwardly into the tank, and the lower end of such pipe carries what I may term a rotatable housing and nozzle assembly unit generally indicated by reference numeral I'I.

That portion of the main feed pipe I5 below 4the cover I3 is shown as being surrounded by a sleeve, generally indicated by reference numeral I9, the lower end of which supports a conical deflecting member 2E) adapted to deflect washing liquid from the nozzle unit into the dome of the tank car. Immediately below the deecting unit the sleeve I9 is provided with a ring member 2I which is provided with handles 22 to facilitate handling the unit.

. 'I'he top of the main feed pipe is shown as being provided with a T-tting 23, such T-tting having a stirrup 25 thereon for use in lowering the unit into a tank. The upper opening of the T -tting is provided with a packing member, not shown, through which an oil delivery pipe 25 rotatably extends, such pipe having an oil cup 25 on its upper end. The arm 23 of theV T-tting receives a suitable conduit 29 which is used to deliver washing liquid into the main feed p-ipe I I.

For convenience in the manufacture and assembly of the unit I prefer to make the main feed pipe I6 in two sections connected together by a flange fitting indicated by reference numeral 35.'. For the purpose of this description, however, the feed pipe may be considered as a single v piece and the lower section Ia will therefore `be referred to in the description as the main feed pipe. It will appear from Fig. 8 that the main feed pipe Ita is provided with an elongated flange 36 which is shown as having a worm gear 3l' formed or otherwise secured thereon. The pur- Ypose of the worm gear will be described later in the specification, but it should be pointed out at this time that such worm gear need not neces'- sarily be an integral part of the flange but may be a separate member suitably secured to the stationary feed pipe.

The housing and nozzle assembly unit I1 includes what I may term a main housing generally indicated by reference numeral 39, such main housing having an upwardly extending sleeve portion i0 which receives the lower end of the stationary feed pipe Ita. The top of this sleeve portion Il is formed in the nature of a bell 42,

' such bell surrounding the elongated flange and gear 36 and 31, respectively. The upper end of the bell G2 receives an externally threaded ring 43 which rests upon ball bearings 44, such bearings in turn resting on the upper shoulder formed by the flange 35. In this way the housing assembly is rotatably mounted on the lower end portion of the main feed pipe I6a. The ring 43 is provided with upstanding lugs 44 adapted to receive a spanner wrench for use in assembling the unit and the ring is adapted to be locked in place by means of an angle member 46 which extends between two of the lugs lid' and is secured to the face of the bell by means of screws 48.

The bottom of the bell is formed with a shoulder which supports the bottom ring element 5I of a seal unit which consists of an upper flanged ring 52 having sliding engagement with the bottom of the elongated iiange 3B, the rings 5i and 52 being yieldably held in spaced relation with each other by means of springs 53. (See Fig. 8). Near the lower end of the sleeve 40 I provide a shoulder 515 which supports a packing ring 55, engaging the lower end of the feed pipe Ita, such packing ring co-operating with the seal members 5I and 52 to afford a substantially leak-proof assembly.

The bottom of the main housing 39 is formed with an enlarged chamber 58 which I have termed a nozzle receiving chamber. This chamber 56 is provided with openings 5l and 58 in the sides of the housing and on an axis which is transverse to the axis of the main feed pipe and. the general axis of rotation of the housing (see Figs. 3 and 6). For this reason I will describe the nozzle housing 56 as being a transverse housing with openings in the side faces thereof.

Reference numeral 5S indicates what I may term a bushing or cage member which is mounted in the nozzle housing 56 through the openings 51 and 58. This bushing member 59 has a ange which fits within a suitably shaped recess formed on one face of the housing member about or adjacent to the opening 58 and the other end of the bushing member is threaded as indicated at 52 to receive a spanner nut 63 which is adapted to co-operate with the flange 60 to lock the bushing member in place. The spanner nut is held in a predetermined position by means of a set screw E5. That portion of the bushing memer which is situated within the housing proper is provided with what I may term an enlarged chamber 56, the wall of which is formed with ports S'I. The bushing or cage member just described constitutes the bearing for a nozzle member generally indicated by reference numeral 'IIJ and its construction is such that by removing the spanner nut 63 the nozzle assembly with all its associated parts may be separated from the main housing.

The nozzle member 'ID is shown as comprising a pair of radially diverging arms lII and 'II, the

outer ends of which are provided with nozzles generally indicated by reference numeral 12.

lis

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.cated by reference numeral epesses These nozzle arms 1| and 1| 'are formed integrally with a hollow spindle 13 which is rctatably mounted in the bushing 59. The end-of the hollow spindle 13 opposite the nozzle member is provided with a closure generally indicated at 14 and that portion of the hollow spindle which is situated within the enlarged chamber 66 and bushing is provided with wall ports generally indicatedby reference numeral 15. A pin 11 is formed on the closed end of the hollow spindle, such pin extending through a packing ring 18 provided in an opening through what I may term a bearing cap 19. This bearing cap 19 is secured by means of screws 80 to the face of the bushing 59 and is provided with an undercut portion 8| which receives a radial-thrust bearing 82. A nut 83 is threaded on the end of the pin 11 in engagement with one runner of the radial-thrust bearing, so it will be seen that this bearing receives the thrust of the nozzle unit during its operation. A cap 85 is mounted over the opening through the cover member 19, such cap being provided with a grease fitting 86 for lubricating the radial-thrust bearing. A spring pressed liquid seal assembly, generally indicated by. reference numeral 90, is mounted upon the end 'of the hollow spindle 13 around the pin 11 and is contained within a recess 9| formed in the end of the bushing. This recess is provided with a drain opening generally indicated by reference numeral 92.

That portion of the hollow spindle 13 which carries the nozzle 1| and 1| extends a substantial distance beyond an extending portion 91 on the bushing so as to leave space for the reception of another pair of seal rings generally indi- 98. The diameter of the nozzle member at this section is then increased to form an annular shoulder 99 which supports the outer edge of what `I may term a cam collar which is secured to the nozzle member by means of screws |0|. This cam collar |00 is provided with a cam flange indicated at |02, the purpose of which will be hereinafter more fully described, and that portion of the collar opposite the cam extends inwardly to a point above the extension 91 on the bushing Where it is provided with an underhanging annular lip |04 which provides a recess vfor the reception of the ball bearing |05. Reference numeral |06 indicates a grease duct which communicates with the bearing |05 and is provided with a suitable grease fitting |06' mounted on the outer face of the nozzle member.

The periphery of the inner end of the collar |00 is cut away as indicated at |01 to receive a floating gear |08. This oating gear |08 has recesses formed therein, such recesses receiving pawls ||2 which are supported on pins ||3 and are pressed inwardly by means of springs ||4 toward their ratchet teeth |15 which are out on the periphery of the collar member |00 at its inner end (see Fig. 5).

It is a feature of this invention that the turbine wheel is driven by the same pressure fluid which is delivered into the housing for washing purposes, and for the pressure fluid againt the vanes ofthe turbine wheel I provide the housing with what I may term turbine nozzle feed chambers indicated by reference numeral |60 and |60 (see Figs. 2 and 6). The chambers |60 and |60" have annular recesses |6| and |6| in their walls, such recesses communicating with passages |62 and |62 which lead to transverse passages |63 which carry the turbine nozzle members |64 and |64.

The turbine nozzle feed chambers |60 and |60 are identical except for their positions on the housing and each is provided with a cover indicated at |61 which has an inwardly extending ange |68 provided with ports |69 communicating with the annular passage |6|,or |6|' as the case may be. The inner edge of the flange |68 engages a screen which is positioned against a shoulder |1| surrounding the opening |12 which communicates with the chamber |6| or |6|. This screen serves thevpurpose of straining the liquid which is to be used for the purpose of iinpelling the turbine.

For the purpose of insuring proper lubrication of the turbine shaft bearings |43 and |44, I provide the turbine shaft with oppositely disposed screw or worm threads which extend in opposite directions from the central portion indicated by the groove |13. The boss |32 which supports the turbine shaft is provided with an opening |13 situated opposite the groove |13, such opening containing a fitting |14 which communicates with an oil drip reservoir |14. This drip reservoir |14" is fed from a pipe |15, such pipe being connected at its lower end to a boss on the main housing with a passage |16 formed in an enlarged boss |11 which is cast or drilled in the housing. The passage |16, in turn, communicates with a passage |11 which extends through another boss |18 formed on the housing, such passage having a fitting |18 in its lower end which is connected to a U-tting |19 and a suitable bushing |80 with the lower end of the oil delivery pipe 25. As will be observed in Fig. 6, the lower end of the pipe 25 extends through an opening `|8| in the bottom of the housing, below which an internally threaded collar |82 extends, such collar receiving a packing assembly generally indicated at |83. The U-pipe and the associated fittings are provided secured to a flatface |86 on the lower portion of 'the housing by means of screws |81.

YItwill be apparent` from the description as de,-

purpose of directing such with a cover member |05 `which is scribed so far that when awashing liquid under pressure is delivered into the stationary feed pipe |6'a it passes downwardly therethrough into the enlarged chamber 56. From the enlarged chamber 56 part of this liquid passes into the two nozzle feed 'reservoirs or chambers |60 and |60 from which it; is directed through the asociated passages andthe nozzle members |64 and |64 into engagement with the vanes of the turb-ine wheel. The rotation thus set up in the turbine wheel is carried'through the turbine shaft and the associated worm gears to the worm gear |08 on the collar member which is secured to the nozzle member. The rotation is such as to force the pawls into positive engagement with the ratchet teeth on the collar member, thereby setting up a rotation of the nozzle, and the turbine nozzles may be .adjusted from right to left in order to vary the speed to obtain that which is desired for the particular purpose. The bulk of the washing liquid, which is delivered into the enlarged chamber 56, passes through the. ports in the bushing and the nozzle member, entering the hollow spindle of the nozzle and therefrom passes directly into the diverging nozzles where it is projected into engagement with the surfaces to be cleansed.

For the purpose of protecting the gear and cam mechanism on the nozzle member, the face platev |21 is provided with a projecting flange |21' which Vreceives a correspondingly shaped cover member |95, such cover member being secured to the flange by means of screws i 06. The liange |21' is provided with an opening in its bottom indicated at, |91 to take care of any leakage which might occur through the seals in the nozzle assembly.

It was previously pointed out as one important object of this invention to provide an improved means for effecting the step by step rotation of the housing and its associated parts about the main feed pipe during the rotation of the nozzle, and it is for this purpose that the cam |02 is provided. This cam, it will be observed in Fig. 4, is provided with two diametrically disposed abrupt humps indicated at 200 and 200. Numeral 20| indicates a push rod which is supported in a guide 202, and extends through a bossed opening 203 on the top of the cover. The lower end of this push rod has a follower 204 which engages the cam and the upper end engages a head 233 on an auxiliary push rod 20|.

Reference numeral 2|0 indicates what I may term a box member which is preferably cast upon vthe barrel portion of the main housing and circumscribes an opening 2 in the side of the bell adjacent the worm 31. This box member 2I0 is provided with a cover 2|2 secured thereto by means of screws 2 i3, and the interior of the cover and the box member are provided with co-operating ribs 2|4 which have bearing portions 2|5 thereon supporting a shaft member 2|0. (See Figs. 3 and 4). The shaft 2|6 carries a worm 2|1 which engages the worm gear 31. In addition to the worm 2|1 the shaft carries a ratchet wheel 220- and freely rotatable pawl carrier 22| which stra'ddles the ratchet wheel.

The pawl carrier 22| is provided with a pawl 222-mounted on a pivot pin 223, the pawl being disposed so as to engage the teeth on the ratchet wheeland being provided with a forwardly extending weight 224 to hold it in such engagement. The bottom of the pawl carrier has an inclined face 226 which is situated above the upper end of the auxiliaryrpushrod. 20|. The push rods20l,

20| Yare therefore adapted to push the pawl carrier upwardly imparting a rotation to the ratchet wheel in the direction4 of the arrow A in Fig. 3 and,

for the purpose of returning the pawl carrier to tending boss 230 which is -provided with a passage for the push rod section 20 Immediately below the boss 230 on the bottom of the cover member I provide a bell 23| which ts over the boss 203 on thetop of the cover |95, such bell containing a compression spring 232 which engages the head 233A on the section 20| to hold the follower in pressure engagement with the cam.

It will thus be seen that during the rotation of the cam each of the humps thereon is effective to push the push rods 20|-20| upwardly into engagement with the pawl carrier, thereby effecting a segment of rotation in the ratchet wheel and its associated worm which in turn is effective to impart a step of rotation to the housing about its vertical axis. The extent of the rotation which is imparted to the housing in this manner depends upon the position to which the pawl carrier has dropped prior to its engagement with the push rod.

I take advantage of this last mentioned fact to obtain the variations in the increment of rotation for the purpose pointed out above. This is accomplished by providing the interior of the housing with a lever member 250 mounted on a pin 24| and having one end 242 thereof positioned below a projected corner 243 on the pawl carrier. The end 262 of this lever member is shown as being offset downwardly from the main portion thereof and the connecting arm is shown as being slotted as indicated at 245 to receive what I may term a stop lever 246. This stop lever 266 is held in its uppermost position by means of a cushion spring 249 and as the pawl carrier drops the extended portion 243 swings into engagement with the stop lever, its downward movement being cushioned by the spring. The position of the lever member 240 is governed by a connecting rod 25|, the lower end of which extends through an opening 252 in the lever and is provided with an adjustable nut 253. A compression spring 255 is interposed between the lever and the top of the cover 2|2 to hold the lever in its lowermost position. The connecting rod 25| extends through an opening in the top of the cover and has its upper end provided with a knife-edged bearing 251 which is threaded on the rod. This knife-edged bearing 251 is received in notches 258 in the end of a cam operated lever 259V through which the upper end of the rod extends. This cam operated lever 259 is mounted on a pin 260 supported by standards 26|'on top of the cover 2|2. The free end of the lever 259 is provided with a cam follower 262 which engages a face cam 263 formed on a plate 264 secured by welding or in any other Suitable manner to the main feed pipe |6a. It will be seen that as the follower is pressed downwardly by the action of the cam the bottom lever 240 is raised which correspondingly raises the stop member 246 as illustrated in Fig. 9 and consequently the pawl carrier is not permitted to drop over as many teeth'as it is when the follower engages a depression in the cam as illustrated in Fig. 10 which permits the pawl carrier to drop to a lower position.

Relative to-Figs. 9 and 10 it is to be understood fromiFigs. Sand l'that the pawl carrier and-'its 4ed by said housing said cam; a pawl "associated mechanism are illustrated as having been turned through 90 from their actual position in the machine. The shape of the cam will depend of course upon the type of tank being cleaned and the extent of the movement can be governed by varying the adjustment upon either of the nuts on the ends of the connecting rod 25|. A shield '2li is shown as being mounted on top of the cover 2|Z for the purpose of protecting the cam lever and its associated parts.

It is to be understood that, while I have herein described and illustrated one preferred form of my invention, the invention is not limited to the precise construction described above but includes within its scope whatever changes fairly come within the spirit of the appended claims.

I claim as my invention:

1. In a cleaning device of the class described, the combination of: a stationary feed pipe; supporting means for said feed pipe; a housing unit mounted on the end of said feed pipe for rotation about the axis of said feed pipe; a nozzle unit mounted in said housing for rotation about an axis normal to the axis of said housing; means for producing a continuous rotation of said nozzle unit about its axis; a cam member secured to said nozzle unit; a push rod slidably supportunit with one end engaging carrier swingably supported on said housing unit and adapted to be engaged by the other end of said push rod; a pawl in said `pawl carrier; ratchet means rotatably supported `on said housing unit in engagement with said pawl; a worm rigidly connected with said ratchet means; and a Worm gear secured to said feed pipe and engaging said worm.

2. In a cleaning porting means for said feed pipe; a housing unit mounted on the end of said feed pipe for rotation about the axis of said feed pipe; a nozzle 'unit mounted in said housing for rotation about cam; yieldable means holding said push rod in pressure engagement with said cam; a pawl carrier swingably supported on said housing unit v and adapted to be engaged by the other end of said push rod; a pawl in said pawl carrier; ratchet means rotatably supported on said housing unit in engagement with said pawl; a worm rigidly connected with said ratchet means; and a worm "gear secured to said feed pipe and engaging said Worm.

3. In a cleaning device of the class described, the combination of t a stationary feed pipe; supporting means for said feed pipe; a housing unit mounted on the end of said feed pipe for rotation about the axis of said feed pipe; a nozzle unit mounted in said housing for rotation about .an axis normal to the axis of said housing; means for producing continuous rotation of said nozzle Vunit about its axis; a cam member secured to said nozzle unit; a push rod slidably supported by said housing unit with one end engaging said cam; a pawl carrier swingably supported on said housing unit and adapted to be engaged by the other end of said push rod; a pawl in said pawl carrier; ratchet means rotatably supported on said housing unit in engagement with said pawl; a worm rigidly connected with said ratchet means;

device of the class described, `the combination of: a stationary feed pipe; sup- `pawl carrier toward said -and a worm gear secured to said feedpipe and engaging said worm, said cam being'formed so as to impart intermittent movement to said push rod during the rotation of said nozzle unit.

4. In a cleaning device of the class described, 5 the combination of: a stationary feed pipe; supporting means for said feed pipe; a housing unit mounted on the end of said feed pipe for rotation about the axis of said feed pipe; a nozzle unit mounted in said housing for rotation aboutv an il() axis normal to the axis of said housing; means for producing a continuous rotation of said nozzle unit about its axis; a cam member secured to said nozzle unit; a push rod slidably supported by said housing unit with one end engaging said :15 cam; a pawl carrier swingably supported on said housing unit and adapted to be engaged by the other end of said push rod; a pawl in said pawl carrier; ratchet means rotatably supported on said housing unit in engagement with said pawl; 29 a worm rigidly connected with said ratchet means; a worm gear secured to said feed pipe and engaging said worm; and stop means for limiting the downward movement of said pawl carrier toward said push rod.

5. In a cleaning device of the class described, the combination of a stationary feed pipe; supporting means for said feed pipe; a housing unit mounted on the end of said feed pipe for rotation about the axis of said feed pipe; a nozzle unit [30 mounted in said housing for rotation about an axis normal to the axis of said housing; means for producing a continuous rotation of said nozzle unit about its axis; a cam member secured to said nozzle unit; a push rod slidably supported by said n3-5 housing unit with one end engaging said cam; a pawl carrier swingably supported on said housing unit and adapted to be engaged by the other` end of said push rod; a pawl in said pawl carrier;

ratchet means rotatably supported on said hous- '40 ing unit in engagement with said pawl; a worm rigidly connected with said ratchet means; a worm gear secured to said feed pipe and engaging said worm; and stop means for limiting the down'- ward movement of said pawl carrier toward said :'45 push rod, said stop means including a lever pivoted to said housing unit with one end below said pawl carrier, a cam member on said feed pipe, a second lever member pivoted on said housing unit and having one end engaging said cam, 50 and a link interconnecting said levers.

6. In a cleaning device of the class described, the combination of: a stationary feed pipe; supporting means for said feed pipe; a housing unit mounted on the end of said feed pipe for rotation about the axis of said feed pipe; a nozzle unit mounted in said housing for rotation about an axis normal to the axis of said housing; means for producing a continuous rotation of said nozzlelr 60 unit about its axis; a cam member secured to said nozzle unit; a push rod slidably supported by said housing unit with one end engaging said cam; a pawl carrier swingably supported on said housing unit and adapted to be engaged by the-65 other end of said push rod; a pawl in said pawl carrier; ratchet means rotatably supported on said unit in engagement with said pawl; a worm rigidly connected with said ratchet means; a worm gear secured to said feed pipe and engag-i 70 ing said worm; stop means below said pawl carrier for limiting the downward movement of said push rod; and automatic means operable during the rotation of said housing unit for varying the position of said stop means with respect to said pawl carrier at predetermined intervals.

7. In a cleaning device of the cl-ass described, the combination of: a stationary feed pipe; supporting means for said feed pipe; a housing unit mounted on the end of said feed pipe for rotation about the axis of said feed pipe; a nozzle unit mounted in said housing for rotation about an axis normal tothe axis of said housing; means for producing a continuous rotation of said nozzle unit about its axis; a cam member secured to said nozzle unit; a push rod slidably supported by said housing unit with one end engaging said cam; a pawl carrier swingably supported on said housing unit and adapted to be engaged by the other end of said push rod; a pawl in said pawl carrier; ratchet means rotatably supported on said housing unit in engagement with said pawl; a worm rigidly connected with said ratchet means; a worm gear secured to said feed pipe and engaging said worm; stop means for limiting the downward movement of said pawl carrier toward said push rod; and a cushioning member -on said stop means adapted to be engaged by said pawl carrier.

8.` In a cleaning device of the class described, the combination of t a stationary feed pipe; supporting means for said feed pipe; a housing unit mounted on the end of said feed pipe for rotation .about the axis of said feed pipe; a nozzle unit mounted in-said housing for rotation about an .axis normal to the axis of said housing; means for producing a continuous rotation of said nozzle unit about its axis; a cam member secured to said nozzle unit; a push rodslidably supported by said housing `unit with one end engaging said cam; `a pawl carrier swingably supporte-d -on said housing unit and adapted to be engaged by the other end of saidpush rod; a pawl in said pawl carrier; ratchet means rotatably supported on said housing unit in engagement with said pawl; a worm rigidly connected with said ratchet means; a worm gear secured to said feed pipe and engaging said Worm; and stop means for limiting the downward movementof said pawl carrier toward .said push rod, said stop means including a lever pivoted to said housing unit with one end below said pawl carrier, a stop member movably mounted inthe said lever for engagement with said pawl carrier, spring means holding said stop member in elevated position; a cam member on said feed pipe, a second lever member pivoted on said housing unit and having one end engaging said cam, and link means interconnecting said levers.

9. In a cleaning device of the class described, the combination of a stationary feed pipe having a bearing flange and a worm gear thereon; a housing member havinga sleeve section provided with a bell adapted to receive said flange and gear; bearing means in the top of said bell for supporting said housing from said bearing ange; a box member formed on said housing and enclosing an opening in the side of said bell; a worm shaft mounted in said box member; a worm on said worm shaft engaging said worm gear; a ratchet member on said worm sh-aft; pawl means swingably supported in said box for advancing Vsaid ratchet member and said worm; a push rod slidably extending through the bottom of said box member with its upper end adapted for engagement with said pawl member; va nozzle member mounted in the bottom of said housing for rot-ation about an axis normal to the axis of said housing; a cam secured to said nozzle member and engagingthe bottom of said Ypush rod; :and means for rotating said nozzle member.

10. In a cleaning device of the class described, the combination of: a stationary feed pipe having a bearing flange and a worm gear thereon; a housing member having a sleeve section provided with a bell adapted to receive said flange and gear; bearing means in the top of said bell for supporting said housing from said bearing flange; a box member formed on said housing and enclosing an opening in the side of said bell; a worm shaft mounted in said box member; a worm on said worm shaft engaging said worm gear; a ratchet member on said worm shaft; pawl means swing-ably supported in said box for advancing said ratchet member and said worm; a push rod slidably extending through the bottom of said box member with its upper end adapted for engagement with said pawl member; a nozzle member mounted in the bottom of said housing for rotation about an axis normal to the axis of said housing; a cam secured to said nozzle member and engaging the bottom of saidv push rod; means for rotating said nozzle member; and a cover member secured to said housing below said box member, said cover member having guides formed therein, slidably engaging said pushrod.

l1. In a cleaning device of the class described, the combination of: a stationary feed pipe having a bearing ange and a Worm gear thereon; a housing member having a sleeve section pro.- vided with a bell adapted to receive said ange and gear; bearing means in the top of said bell for supporting said housing from said bearing flange; a box member formed on said housing and enclosing an opening in the side of said bell; a worm shaft mounted in said box member; a worm on said worm shaft engaging said worm gear; a ratchet member on said worm shaft; pawl means swingably supported in said box for. advancing said ratchet member and said worm; a push rod slidably extending through the bottom of said box member with its upper end adapted for engagement with said pawl member; a nozzle member mounted in the bottom of said-housing for rotation about an axis normal to the axis of said housing; a cam secured to said nozzle member and engaging the bottom of said push rod; means for rotating said nozzle member; and means for limiting the Yswinging movement of said pawl means, comprising a face cam secured to said feed pipe above said bell, a level` member engaging said face cam, pivot means on the top of said box member supporting said lever member, a second lever pivoted in said box member with an end thereof below said pawl member, and a rod extending through an opening in the top of said box member and interconnecting said levers.

12. In a cleaning device of the class described, the combination of a stationary feed pipe; a housing rotatably mounted on the end of said feed pipe, said housing having a transverse nozzle chamber with openings in the sides of said housing; a cage member mounted in said nozzle chamber through said side openings and having wall ports communicating with the interior of said housing; a nozzle member having a hollow spindle rotatably mounted in said cage member, said spindle having wall ports communicating with the interior of said cage; means for securing said cage member in said nozzle housing; thrust receiving means for holding said nozzle member against transverse movement in said cage member; means for rotating said nozzle terior of said cage; means for securing said cage member in said nozzle housing; thrust receiving means for holding said nozzle member against transverse movement in said cage member; liquid sealing means interposed between said spindle and said cage member on opposite sides of said wall ports; means for rotating said nozzle spindle; and means for simultaneously rotating said housing.

14. In a cleaning device of the class described,

the combination of a stationary feed pipe; a

housing unit rotatably mounted on the end of said feed pipe, said housing having a transverse nozzle chamber provided With side openings; a bushing member extending through the side openings in said nozzle chamber; a flange on said bushing engaging one face of said housing adjacent one of said side openings; a nut in threaded engagement with said bushing engaging a face of said housing adjacent the other `side opening, said bushing having an enlarged chamber provided with wall ports situated within said housing; a nozzle member having a hollow spindle rotatably mounted in said bushing, said spindle having Wall ports situated in said enlarged chamber; thrust receiving means interposed between said bushng and said spindle for holding said spindle against transverse movement; means for rotating said nozzle spindle in said housing; and means for simultaneously turning said housing on said feed pipe.

15. In a cleaning device ofthe class described, the combination of: a stationary feed pipe; a housing unit rotatably mounted on the end of said feed pipe, said housing having a transverse nozzle chamber provided with side openings; a bushing member extending through the side openings in said nozzle chamber; a flange on said bushing engaging one face o-f said housing adjacent one of said side openings; a nut in threaded engagement with said bushing engaging a face of said housing adjacent the other side opening, said bushing having an enlarged chamber provided with wall ports situated within said housing; a nozzle member having a hollow spindle rotatably mounted in said bushing, said spindle having Wall ports situated in said enlarged chamber; thrust receiving means interposed between said bushing and said spindle for holding said spindle against transverse movement, said thrust receiving means comprising a cap plate on the end of said bushing, a pin on said spindle extending through said cap plate, a nut on the end of said pin, and a radial thrust bearing interposed between said nut and said cap plate; means for rotating said nozzle spindle in said housing; and means for simultaneously turning said housing on said feed pipe.

16. For use in a tank cleaning device of the class described, the combination of: a housing having a nozzle chamber provided with side openings; a bushing member extending through said side openings and having a flange engaging the face of said housing adjacent one of said side openings; a nut threaded on said bushing and engaging the face of said housing adjacent the other side opening, said bushing member having an enlarged chamber situated in said housing and provided with ports communicating with the interior of said housing; a nozzle member having a hollow spindle rotatably mounted in said bush.- ing, and radial nozzle means on' one end thereof outside of said bushing, said spindle having ports communicating with said enlarged chamber; a pin on the end of said spindle opposite the nozzles on said nozzle member; bearing means on said pin; a cap plate interposed between said bearing means and said bushing; a collar member secured to said bushing and having a portion extending over said bushing; bearing means interposed between the extension on said collar and an annular face on said bushing; means for rotating said nozzle spindle in said housing; and means for simultaneously turning said housing on said feed pipe.

17. For use in a tank cleaning device of the class described, the combination of a housing having a nozzle chamber provided with side openings; a bushing member extending through said side .openings and having a flange engaging the face of said housing adjacent one of said side openings; a nut threaded on said bushing and engaging the face of said housing adjacent the other of said side openings, said bushing member having an enlarged chamber situated in said housing and provided with ports communicating with the interior of said housing; a nozzle member having a hollow spindle rotatably mounted in said bushing, and radial nozzle means on one end thereof outside of said bushing, said spindle having ports communicating with said enlarged chamber; a pin on the end of said spindle opposite the nozzles on said nozzle member; bearing means on said pin; a cap plate interposed between said bearing means and said bushing; a collar secured to said nozzle member and having a portion extending over said bushing; bearing means interposed between the extensions on said collar and an annular face on said bushing; a floating gear mounted on said collar member; a pawl in said gear; ratchet teeth on said collar member adapted to be engaged by said pawl; and `power means on said housing for driving said gear and thereby rotating said nozzle spindle in said bushing.

18. For use in a tank cleaning device of the class described, the combination of: a housing; a nozzle member mounted in internal communication with said housing for rotation about an axis normal to the axis of said housing; a hollow boss formed on said housing; a turbine shaft extending through said hollow boss; bearing means in the ends of said boss supporting said turbine shaft; means including conduits in said housing for delivering lubricant into the midportio-n of said hollow boss; oppositely disposed threads on said shaft for conveying said lubricant from the mid-portion of said boss to said bearings; a turbine wheel on one end of said shaft; gear means connecting the other end of said shaft with said nozzle member; and means against said turbine wheel.

WILLIAM OSTLING.