US3166252A

US3166252A - Swivel mount for spray nozzles

Info

Publication number: US3166252A
Application number: US277241A
Authority: US
Inventors: Edward J O'brien; Robert P Williams
Original assignee: Spraying Systems Co
Current assignee: Spraying Systems Co
Priority date: 1963-05-01
Filing date: 1963-05-01
Publication date: 1965-01-19
Anticipated expiration: 1982-01-19
Also published as: DK134927C; GB982648A; DK134927B; DE1571165B1

Description

Jan. 19, 1965 E. J. O'BRIEN ETAL SWIVEL MOUNT FOR SPRAY NOZZLES 2 Sheets-Sheet 1 Filed May 1, 1963 Jan. 19, 1965 E. J. O'BRIEN ETAL SWIVEL MOUNT FOR SPRAY NOZZLES 2 Sheets-Sheet 2 Filed May 1, 1963 izueniars E 6514/0765 J Uf rzem,

United States Patent Ofitice 3,166,252 Patented Jan. 19, 1965 3,166,252 SWIVEL MOUNT FOR SPRAY N OZZLES Edward J. OBrien, Glen Ellyn, and Robert P. Williams, Naperville, IlL, assignors to Spraying Systems (30., a corporation of Illinois Filed May 1, 1963, Ser. No. 277,241 6 Claims. (Cl. 239-587) This invention relates to spray guns and particularly to spray guns wherein the spray nozzle is mounted by means of a swivel for adjustment to ditierent positions.

In the use of spray guns it has been found that it is often necessary to mount the spray nozzle for pivotal adjustment relative to the supporting body, and this situation is encountered for example in connection with pole or wand type spray guns of the kind shown in Fred W. Wahlin, Patent D194,169, patented November 27, 1962, and in stationarily mounted, automatically controlled spray guns that are utilized in spraying manufactured articles that are moved past the spray gun by conveyor means.

Since such spray guns involve the use of pressure in feeding the coating material to the spray nozzle, it is essential that the swivel upon which the spray nozzle is mounted be of such a character that it provides a tight or non-leaking joint. In prior swivel mounted spray nozzle arrangements, it has usually been necessary to provide Various forms of screw threaded tightening devices which were loosened when the spray nozzle position was to be adjusted and which were then tightened to produce the proper sealing action and at the same time hold the spray nozzle in the desired position of adjustment.

The matter of maintaining a proper sealing and wivel mount for such spray guns becomes particularly critical when the spray gun is being used in airless paint spraying for in such uses it is customary to work with pressures from 1000 to 5000 pounds. In view of this it becomes increasingly difficult to provide a proper seal and to maintain such seal in the swivel, and at such high pressures it becomes increasingly desirable to provide such a seal which does not require loosening and tightening as aforesaid when the adjustment of the nozzle position is made. Efforts have been made to provide such a struc ture, but it has been found that even though the desired tightness of seal has been initially established, the repeated movements of the spray nozzle about the axis of the swiveljoint tend to loosen the swivel joint with the result that leakage is encountered.

In viewof the foregoing, it is theprimary object of the present invention to provide a swivel mountfor spray nozzles that may be tightened to the desired degree in order to maintain the desired sealing action and maintain the nozzle in its desiredposition of adjustment and in which this tightened position of adjustment of the swivel cannot be disturbed by the repeated adjustments thatare required with respect to the nozzle position. Another and more specific object is to provide a swivel mountforfl spray nozzles which is readily adaptable for use with varioustypes of conventional spray gun equipment, and" itisa further object to accomplish this through the use of simple structure which may be adjusted to the desired degree of tightness and which will maintain this adjustment. 1 V A further object is to provide such a swivel mount wherein the device may be readily assembled and disassembled when this is required 3 Other and further objects of the present invention will be apparent from the following description and claims, and are illustrated in the accompanying drawings, which, byway'of illustration, show a preferredembodirnent of the present invention and the principles thereof, and

what is now considered to be the best mode in which to apply these principles. Other embodiments of the invention embodying the same or equivalent principles may be used and structural changes may be made as desired by those skilled in the art without departing from the invention.

In the drawings:

FIG. 1 is afragmentary side elevational view of a swivel mounted spray nozzle embodying the features of the invention, the spray nozzle being carried on the end of a wand or pole type spray gun;

FIG. 2 is a perspective view showing the swivel mounted spray nozzle of this invention as utilized on a known type of stationarily mounted, automatically controlled spray FIG. 3 is a longitudinal sectional view through the spray nozzle and its swivel mounting;

FIG. 4 is a cross sectional View taken substantially along the line 4-4 of FIG. 3; and

FIG. 5 is an exploded view showing certain parts of the swivel mounting.

For purposes of disclosure the invention is herein illustrated as embodied in a swivel mounting that is adapted for use for association with diflerent types of spray guns. The swivel mounting 10 is shown in FIG. 1 as being mounted on the end of a hollow tubular wand 11 of a wand type spray gun, while in FIG. 2, the swivel mounting is illustrated as associated with a stationarily mounted, automatically controlled spray gun 12.

The swivel mounting 10 comprises a body 15 having an outlet body 16 associated therewith by means of a swivel stem or pivot 17 so that the outlet body may be pivoted with relation to the swivel body 15 about the axis of the swivel stem 17. The outlet body has its outer end threaded at 16T and a nozzle cap 18 is threaded onto the outlet body to support a suitable nozzle 20 at the end of the outlet body.

The swivel body 15 is shown in detail in FIGS. 3, 4 and 5, and it will be noted that this body has parallel fiat side faces 21 and an opening 22 extended through the faces 21 and the body 15 perpendicular to the fiat faces In the present instance this portion of the passage 24 is hand end, as viewed in FIGS. 3 and 5, is counterbored to provide a packing seat 245.

The threaded passage 24 provides means for associating the swivel body 15 with a spray gun, and this is accomplished through the intermediary of a union 30 whereby the union may be connected to a valve supported body such as the body 31. As shown in FIG. 3, the body 31 is threaded onto the end of the tubular wand 11 through which the paint must pass, and a valve rod. 32 extends through the wand 11 for operating a needle valve means that is provided in connection with the body 31.

Thus, the body 31 has a passage'31P therethrough that is. internally threaded at 31T to receive a seat plug 33. The seat plug has a passage 33F therethrough, and ha a seat plug 34 mounted therein on a tapered seat formed at the left hand end of the passage 33. The valve rod 32 carries a hardened needle point 35 that cooperates with the seat insert 34, the valve being closed when the rod 32 is moved to its left hand position. The union 30 is utilized to associate the valve supporting body 31 with the swivel body 15. Thus the union provided by a cap 36 is internally screw threaded onto the external threads 3 provided on the left hand portion of the body 31. The union 36 also includes a swivel adaptor plug 38 that has a cen'tral opening or passage therethrough and is externally threaded so that it may be screwed into the th'readsfMT of the passage 24 of the swivel body. When this is done, a packing gasket 39 is clamped against packing seat 248. The adaptor plug 38 may be tightened through the use of an Allen type wrench that is extended into aihexagon'al portion 46 of the passage that extends through the adaptor plug 38.

In connecting the union 30 to the valve supporting body 31, a gasket 41 is preferably put in position between the opposed faces of the adaptor plug 38 and the seat plug 33.

In associating the swivel body 15 with the outlet body 16, the outlet body 16 is provided with a transverse passage 50 through which the swivel stem 17 extends, and the passage St) is connected by a

passage

51 and 52 to the nozzle tip 20.

The transverse passage 52 is counterbored at one end to provide a packing seat 508, while at the other end of the passage 51 the outlet body is reduced as by turning to provide a, nipple 54 that may extend into the adjacent counterbored side of the swivel body to hold a packing ring 54? against the adjacent packing seat 2-3. The counterbore thus acts as alateral supporting bearing for the nipple 54.

As above pointed out, the swivel stem 17 extends through the passage 50 and the swivel stem 17 has a cylindrical head 17H of a diameter that will fit in a bearing relation into the counterbored end of the passage 50 so that it may hold a packing ring 55 against the packing seat StlS. Adjacent the head 17H, the swivel stern has a reduced bearing portion 17B that enters the passage 50 in a reasonably snug bearing relationship. Beyond the bearing portion 17B, the swivel stem 17 has a rela tively long reduced portion 17R so that this portion 17R is spaced substantially from the walls of the passage 50 and from the walls of the hexagonal passage 22 of the swivel body 15. The swivel stem 17 has a non-circular, and in this instance, hexagonal enlargement 17E formed thereon located at the other end of the reduced portion 17R and in such a relation that the hexagonal enlargement 17E will be located in engagement with the hexagonal passage 22 near the other end of the passage 22. The critical thing about this location is that enough of the end of the inlet passage 24 be exposed opposite the reduced portion 17R to' provide for moving of the paint through theswivel.

At its other end, beyond the enlargement 17E, the swivel stem has a screw threaded end portion 175 so that a cap nut 58 may bethreaded thereon to compress a packing ring 58F against the adjacent packing seat 23. When the cap nut 58 is tightened, the swivel stem 17 is held against rotation by theinteraction of the enlargement 17E with the hexagonal passage 22,; and the tightening of the cap nut 58 is carried to such a point that'the

several packing rings

55, 54? and 58F along the axis of the swivel stem 17 are tightened andcompressed to the desired degree. Then, when the outlet body 16 is moved about the axis of the swivel stem, such movement cannot impart rotative movement to the swivel stem 17. This is true because the enlargement 17E is permanently located in engagement with the hexagonal passage 22. Hence the proper seal is maintained and'the frictional action of the packing is of course sufficientto maintain the outlet body 16 in any desired position of adjustment.

the present invention provides a new improved swivel mount for spray nozzles that may be permanently tightened to the desired degree in order to maintain the desired sealing action while at the same time mounting the nozzle in its desired position of adjustment. It will also be evident that the present invention accomplishes the foregoing in such a way that the tightened relationship of the swivel mount is not and cannot be disturbed by repeated adjustments of the nozzle to different positions about the axis of the swivel.

It will also be apparent that the improved swivel mount that is provided by this invention is adapted for use with various kinds of spray gun equipment andthe structure is provided by means that may be readily and easily manufactured and assembled. A

Thus while a preferred embodiment of the invention has'been illustrated herein, it is to be understood that changes and variations may be made by those skilled in the art without departing from the spirit and scope of the appended claims.

We claim:

1. In a pivotally adjustable mount for spray nozzles, a swivel body having parallel opposite. faces and a passage extended through the body perpendicular to said faces, said swivel body having an inlet adapted to be connected to a source of liquid under pressure and opening into said passage substantially. midway between its ends, said passage having counterbores formed on the axis of said passage at opposite ends thereof, an elongated outlet body having an axial bore therein extending from one end thereof to a point spaced from the other end and having means at said one end thereof for, securing a spray tip thereon in communication with said axial bore, said outlet body having a transverse bore'formed therethrough near said other end intersecting said axial bore, said transverse bore having acounterbore formed at one end thereof and having a projecting sleeve-like nipple at its other endforming an extension ofthe transverse bore, said outlet body being positioned with said transverse bore in alignmentwith said passage ofthe swivel body with said nipple projecting in a bearing relation into the adjacent counterbore of said passage, a swivel stemextended through the transverse bore of the outlet body and the passage of the swivel body and having a-cylindrical head disposed in bearingrelation in the counterbore of said transverse bore, and having a threaded end projecting into the counterbore at the other end of said passage, packing rings disposed in each of said -counterbores, a cap nut threaded onto the threaded .end

of the swivel stem and extending into the adjacent counterbore, said swivel stem being ,of reduced, cross, section through a substantial portion of its'lcngth to provide It is noted that in associating the swlvel mount 10. with other types of spray guns such as the automatically controlled spray gun 12 of FIG. 2', the swivel mount is put in place by connecting the union 3010 a valve-supporting body which, as shown in FIG. 2, is provided by a body 131 that in a gun of the type shown also includes the valve seat structure for cooperation with anee'dle valve that is operatedby a valve rod 132. t

From the foregoing description it will be apparent that for communication of theinlet with the axial bore of the outlet body, said passage and said' swivel stern having complemental non-circular surfaces thereon adjacent the threaded end of said swivel stem andengaged onewith the other to prevent rotation of the swivel stem relative to the swivel body.

2. In amounting structure for spray nozzles, an elongated swivel body and a nozzle-carrying outlet body positioned side by side with aligned passages formed therethrough and a swivel stem extending through the aligned passages, said swivel stern having a head at one end thereof, and said swivel stern having a cap nut threaded onto the other end thereof to hold the bodies together, cooperating cylindrical surfaces on the stem and said outlet body and on said outlet body and said swivel body to support said outletbody forpivotal movement on the axis of the stem and with respect'to said stem and said swivel body, packing rings disposed about said swivel stem between said head and the outlet body, be

tween said swivel body and outlet body, and between the cap and nut and said swivel body so that all three packing rings are compressed when said cap nut is tightened, and said swivel body and said outlet body having inlet and outlet bores formed respectively therein and terminating respectively at the passages of said bodies, said swivel stem having a reduced portion intermediate its ends spaced from the walls of said passages between said inlet and outlet bores, and the swivel stem and the passage of said swivel body having interengaged surfaces to prevent rotation of the swivel stem in said swivel body.

3. A mounting structure according to claim 2 wherein said surfaces of the passage in said swivel body are provided by forming such passage of non-circular cross section throughout its length.

4. A mounting structure according to claim 2 wherein the packing ring between said bodies is disposed in a counterbore in one body and is engaged by a sleeve-like nipple formed on the other body and extending into such counterbore.

5. In a mounting structure for spray nozzles, an elongated swivel body and an elongated nozzle-carrying outlet body positioned side by side with aligned passages formed therethrough and having inlet and outlet bores formed respectively therein and terminating respectively at the passages of said bodies, a swivel stem extending through the aligned passages and having a head engaging the outlet body and a cap nut threaded onto the other end of the stem to hold the bodies together, cooperating cylindrical surfaces on the stern and said outlet body and on said outlet body and said swivel body for supporting said outlet body for pivotal movement with respect to said stem and said swivel body, packing means disposed between said head and the outlet body, between said swivel body and the outlet body, and between the cap nut and said swivel body so that all three packing means are compressed when said cap nut is tightened, said swivel stem having a reduced portion intermediate its ends spaced from the walls of said passages to form a flow area in said passages between said inlet and outlet bores, and the swivel stem and the passages of said swivel body having rotatively interlocked'surfaces 6 for preventing rotation of the swivel stem in said swivel body.

6. In a mounting structure for spray nozzles an elongated swivel body and an elongated nozzle-carrying outlet body positioned side by side with aligned passages formed therethrough and a swivel stein extending through the aligned passages, said swivel stem having a head at one end thereof, and a cap nut threaded onto the stem and adapted to be tightened toward the adjacent side of one of the bodies to hold the bodies together, cooperating cylindrical surfaces on the swivel stem and said outlet body and on said outlet body supporting said outlet body for pivotal movement about and with respect to said stem and said swivel body, packing rings disposed between said head and the outlet body, and between the cap nut and said swivel body so that all three packing rings are compressed when said cap nut is tightened, and said swivel body and said outlet body having longitudinal inlet and outlet bores formed respectively therein and terminating respectively at the passages of said bodies, said swivel stem having a reduced portion intermediate its ends spaced from the walls of said passages between said inlet and outlet bores, the passage in said one of said bodies being of uniform non-circular form, and the swivel stem having an elongated noncircular portion thereon complemental to the form of said non-circular passage to prevent undesired rotation of the swivel stem with respect to said cap nut.

References Cited in the file of this patent UNITED STATES PATENTS 1,531,463 Vincent Mar. 31, 1925 1,961,481 Downs June 5, 1934 2,097,755 Brown Nov. 2, 1937 2,267,194 Drill Dec. 23, 1941 2,417,955 St. Clair et al. Mar. 25, 1947 1 2,472,030 Thulin May 31, 1949 2,683,626 Wahlin July 13, 1954 3,109,671 Braun Nov. 5, 1963 UNITED STATES PATENT OFFlCE CERTIFICATE OF CORRECTION Patent No. 3,166,252 January 19, 1965 Edward J. O'Brien et a1.

It is hereby certified that error appears in the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.

Column 6, line 15, after "body," insert between said swivel body the outlet body,

Signed and sealed this 1st day of June 1965.

(SEAL) Attest:

ERNEST W. SWIDER EDWARD J. BRENNER Attcsting Officer Commissioner of Patents

Claims

2. IN A MOUNTING STRUCTURE FOR SPRAY NOZZLES, AN ELONGATED SWIVEL BODY AND A NOZZLE-CARRYING OUTLET BODY POSITIONED SIDE BY SIDE WITH ALIGNED PASSAGES FORMED THERETHROUGH AND A SWIVEL STEM EXTENDING THROUGH THE ALIGNED PASSAGES, SAID SWIVEL STEM HAVING A HEAD AT ONE END THEREOF, AND SAID SWIVEL STEM HAVIN A CUP NUT THREADED ONTO THE OTHER END THEREOF TO HOLD THE BODIES TOGETHER, COOPERATING CYLINDRICAL SURFACES ON THE STEM AND SAID OUTLET BODY AND ON SAID OUTLET BODY AND SAID SWIVEL BODY TO SUPPORT SAID OUTLET BODY FOR PIVOTAL MOVEMENT ON THE AXIS OF THE STEM AND WITH RESPECT TO SAID STEM AND SAID SWIVEL BODY, PACKING RINGS DISPOSED ABOUT SAID SWIVEL STEM BETWEEN SAID HEAD AND THE OUTLET BODY, BETWEEN SAID SWIVEL BODY AND OUTLET BODY, AND BETWEEN THE CUP AND NUT AND SAID SWIVEL BODY SO THAT ALL THREE PACKING RINGS ARE COMPRESSED WHEN SAID CUP NUT IS TIGHTENED, AND SAID SWIVEL BODY AND SAID OUTLET BODY HAVING INLET AND OUTLET BORES FORMED RESPECTIVELY THEREIN AND TERMINATING RESPECTIVELY AT THE PASSAGES OF SAID BODIES, SAID SWIVEL STEM HAVING A REDUCED PORTION INTERMEDIATE ITS ENDS SPACED FROM THE WALLS OF SAID PASSAGES BETWEEN SAID INLET AND OUTLET BORES, AND THE SWIVEL STEM AND THE PASSAGE OF SAID SWIVEL BODY HAVING INTERENGAGED SURFACES TO PREVENT ROTATION OF THE SWIVEL STEM IN SAID SWIVEL BODY.