US2359300A

US2359300A - Valve

Info

Publication number: US2359300A
Application number: US450237A
Authority: US
Inventors: Horace A Cartwright
Original assignee: Individual
Current assignee: Individual
Priority date: 1942-07-09
Filing date: 1942-07-09
Publication date: 1944-10-03
Anticipated expiration: 1961-10-03

Description

Oct. 3, 1944.

H. A. CARTWRIGHT VALVE Filed July 9, 1942 2 Sheeis-Sheet l ATTORNEY Patented Oct. 3, 1944 UNITED STATES P-TENT OFFICE:

VALVE Horace A. Cartwright, Independence. Kans.

Application'luly 9,-.1942, Serial No. 450,237

8 Claims.

This'` invention relates to. valves;.. and more; particularly to spray valves such as are` used on. bars to distribute bituminousV materialrusedy in-A road construction and maintenance. Work;.the=.. principal. object.` of the invention being to prof-f Vide a spray bar valve capable of e'ectively-r handling heavy viscous materials'.

This application is a continuationzinipartY of', my co-pending application for patent' on Spray' bar for. distributing bituminous and likeA materials, Serial No. 315,056, filed January 22. 1940.

Other objects ofthe invention are to. provide a circulatingspray bar with.- spray nozzles'. capable of effecting positive. cut-off of" the spray material; to provideL spray nozzles which are self-clearing of' material that becomes 1 set inthe jet'v orifices thereof, thereby avoiding skipping ofi the nozzles; to'provide a common control. for a.v plurality of spray valves :mounted on a sprayv bar; to provide :a spray" valve having ay spray port. wherein the cut-off is immediately` adjacent.

the :outlet port of the spray valve; to providel a rotary type of valve wherein circulation ofk heated material is maintained uptothe pointy ofA cuteoft'; toprovide a valve withrportsof dif-- ferential size .which y may be selectively used depending upon the character 0f the coatingl ma terial or the amount of' coverage desired; toA provide resilient means for maintainingl thevalve in seated condition; to provide aV spray valve body with a plurality of spray portsffor selective use; to provide an auxiliary-closureior thezspray. ports not in use to prevent accidental opening of said' ports;

of' travel of the spray'b'ar forl formingV indevide control valves having specially shaped passages Whereby-the sprays may have lean or richcenters; and to provideimproved e1ements-'and=- arrangements thereof in valves of the character and-for the purposes'set forth:

In accomplishingthese and other objects of the invention, as hereinafter described,v I'haveprovided` improved details of structure, the preferred` formszofwhich are illustrated'in the ac-v comlpanying drawings, wherein:

Figzl is a rear elevational Viewvof a-vportion" of a.distributingimachine equippedfwith a spray-'f bar embodying:A thev features of` the p1-esentiK in vention, one. of: the endzsections of z the spray "bari tov provide a movableclosureifor the spray ports for regulating they effectivesizeoff the spray ports and for trimming the edge of the spray, particularly at theends ofthe spraybar; to provide a spray valve having elongated spray ports at an angletofthe path 'Y 40" pendentoverlapping, fan-shaped sprays; to prof b'eingshown in travelling position and the other inrspraying.V or distributing position.

Fi`g;.2:is aplan view ofa portion of theispray bar. andione of the sprayvalves;`

Fig.; 3, is a cross-section through thev valve andgsprayr port'v on the line 3-3, Fig; 4.

Fig. 751s. across-sectionthrough the spray bar' and valve onthe line 'l-l, Fig; 6.

Fig. 8.is a .horizontal cross-section through the valve, particularly illustrating the angular location ofthe spray port;

Fig..9 is adetail perspectiveview of the fparts oioneof the spray valves, said parts being shown in;disassembled spaced relation.

Referringmore indetail to the. drawings:

I designates a machine for distributing bituminous material on a road under construction or inthe maintenance thereof. The machine includesa tankv 2.for. containing material to he` distributed and which iscarried on the chassis ofiJa motor truckindicated by the Wheels 3. The tankilis provided with a heater (not. shown) so that the material is. kept in heated condition 1capable of free iiow under pump pressure through a pipe B'to a spray lbar 5, circulated throughthe spray bar and returned to the tank through a piper 4. The pipes: 4 and 6` are provided `with three-Wayvalves l and 8 respectively having` interconnection through a nipple 9 so that,-4 when material is being icirculated fromY the tankll throughthe bar, the valvesfl and 8v are set to provide iloW through the respective pipes to and from the tank,.andwhen the spraying operation is to berstarted the valves 'l and 8 are'adjustedto providefow to the 'spraybar through bothpipes.

The spray bar- 5. is suitably supported trans'- verselyofthe rear of the truck and includegaVr horizontally arranged central section I0' and end sections Il and l2. The-endvsections arehinged- 1y connected to the `ends of the central sectionby hinge joints I3 and. I4 'to provide'full-width coverage-of a roadway when the end *sections are extended.v and to provide clearance when the end sections are moved to vertical position as when the truck is travelling along a Khighway to and from the site of operation. Each spray bar section includes an outer pipe I5, Fig. 4, having an axially arranged inner pipe I6 of smaller diameter than the inner diameter of the outer pipe to provide a flow passageway I1 therebetween. Formed in the rear side of the outer pipe is a series of threaded openings I8, Fig. 4, which extend through lateral bosses I9. Threaded in the openings I8 are spray valves 20, each including a cylindrical body 2| having external threads 22 to receive the threads about the opening I8 and provided with axial valve chambers 23.

The valve chambers 23 are of cylindrical form at their inlet ends and have central seats 24 terminating in reduced cylindrical bearing portions 25. Engaging the conical seats are rconically shaped valve heads 26 having stems 21 rotatable in the bearing portions 25. The valve stems extend from the valve bodies and carry actuating levers 28. The actuating levers 28 are affixed to the stems of the valves by pins 29 extending therethrough as shown in Fig. 4. The exteriors of the valve housings have similarly reduced portionsto form annular seats 30 for springs 3 I, having their opposite ends bearing against a lever 28 to retain the conical head 26 of the valve in sealing engagement with the conical seat 24 of the valve chambers.

Formed at opposite diametrical sides of the valve bodies are arcuate slots 32 and 33, Fig. 3, having different widths, either one of which may be turned downwardly to provide a spray outlet orifice for the coating material. For example, in

Fig. 4, the narrower slot is shown as being utilized as the effective spray outlet and the wide slot is closed by the conical head of the valve. The valve bodies are retained in selected position by lock nuts 34 that are threaded thereon and drawn against the faces of the bosses I9 as shown in Fig. 4. Formed in the heads 26 of the valves are passageways 35 having inlets 36 arranged coaxially of the end faces of the valves and having outlets 31 opening radially through the conical faces of the heads to connect with the selected spray ports, as shown in Fig. 4. The terminal edges 38 and 39 of the respective slots are bevelled outwardly so that any material which may set therein is readily blown out when the valve iS open. The free ends of the levers 28 are provided with openings 40 to receive the shank 4I of studs 42 projecting from links 43. The links are ipreferably arranged so that they connect the valves in groups, with the ends of the adjacent links for each group connected together through a common mounting on one of the Shanks 4I, as shown in Fig. 1. The links may be reciprocated to effect opening and closing of the valve by any suitable mechanism, for example, one of the lever` arms may be provided with an extension 44, Fig. 1, to which a control cable or rod 45 may be connected.

The operation of a spray bar having valves constructed as described is as follows:

Bituminous material is pumped from the tank under pressure, the valves 1 and 8 being adjusted in such a manner that iiow from the pump is delivered to both inner pipes and the annular passageway I1 of the spray bar section, and then out of the spray valves onto the road. When it is necessary to maintain circulation of the material through the bar, the valve 8 is open to discharge the material into the inner pipe I6 and the valve 1 is set so that the line 4 is open to return the material to the tank, the spray valves .remainingv ample 33.

closed. Since the bituminous material is usually obtained at a central station and conveyed to the site of the work, the end sections of the spray bar are moved to travelling position. When heating the material in the tank and when loading, the valve 8 is adjusted to close flow into the pipe 6 and the valve 1 is adjusted to connect the pipe 9 with the pipe returning to the tank.

When the scene of intended operations is reached, the valves 1 and 8 are then set in such a manner that the material is discharged under pump pressure, through both pipes 4 and 6. The valves are opened simultaneously by locking the lever 28 to bring the outlet ports of the passageways into registry with the lower slots, for ex- The material is then discharged through the slots onto the roadway. When the arms are swung in the opposite direction, the ports in the valves are moved out of registry with the slots to cut off the flow. Since the flow is cut off directly at the inlet of the slots, the only material that can become set is that remaining in the slots, but, due to the shape of the slots, this material is readily discharged when the valves are again opened. If it is desired to increase the amount of material to be applied to the road, the jam-nuts 34 may be loosened and the entire valve body rotated so that the largest slots 3,2 are facing downwardly, after which the jam-nuts 34 are tightened to retain the valve bodies in the selected position.

In some work it may be desirable to have more material discharged at the center of the sprays.V

This is effected, as shown in Fig. 5, by shaping the passageways 35 in such a manner that the central portion 46 thereof is eiective to open the slots, While the ends of the slots are covered or partially covered, as shown at 41 in Flg.5.

In the modified forn of vawe shown in Figs. y6l to 9 inclusive, the slots '48 and 49 in the cylin-v drical valve body 50 are cut at an angle to the longitudinal axis of the valve whereby the spray delivered by the valve is fan-shaped and at an' angle to the line of travel of the truck so that the sprays are independent but overlapping. Cooperating -with the angular arrangement of ,the slots 48 and 49 are passageways 5I in the conically shaped valve head 52, the passageways being arranged substantially perpendicularly to thev end engaging the valve bodiesV and the other bear- Y ing against a lever 59 keyed to thevstem 60 by a pin 6I. The valve is opened and closed by rotation of the valve member by the lever 59 which is operated through linkage 62.

In order to avoid the possibility of the acci-l dental movement of the lever 59 to the extent that the slot l48 might be opened and bituminous. material sprayed upwardly over` the mechanism,-

a clip 63 is preferably sleeved overthe cylindrical portions of the valve body to1close the slots not directed toward the roadway;` The clip 63 extends substantially more than half-way around theperiphery of the valve body so: that pressure exerted on said clip through the'slots 48 is off-- The valve bodies are locked.

setby the gripping-action of the ends 64 of the clip. The clip is substantially wider than the greatest width of the slots to provide' sufficient bearing area on thevalve body to effectively close theslots therein.

Much difficulty has been experienced in the trimming of the sprays adjacent the side ofy the road to'make a deiinite line of coverage and maintain an even distribution of bituminousmaterial completely across the road to the edges thereof.

In the present valve structure the sprays may be trimmed as desired by rotating the clip 63 on the valve body to move one of the ends 64 of the clip over a portion oi the slots discharging on the road to effectively reduce the area thereof as shown at 65. In this manner the fan shaped spray may .be cut on one side to produce a'denite line of coverage without interfering with the normal distribution of the material on the road by the overlapping sprays.

The operation of a spray bar having valves of the character shown in Figs. 6 to 9 inclusive, is substantially the same as that described in reference to the valves shown in Figs. 2, 3 and 4, in regard to the delivery and circulation of material through said spray -bar and valve. The clips 63 are normally placed on the upper portion of the valve body to eiect closing of the slots directed upwardly away from the road. The clip on the valves adjacent the end of the spray bar is rotated on the valve body until one end 64 of said clip reduces the eiective area of the slots to trim the outer edge of the fan shaped spray to eiect a definite line of coverage of the road.

From the foregoing it is apparent that I have provided a spray bar valve of simple form, which is easily cleaned and is easily controlled by a minimum amount of linkage; that the valve parts are readily movable with little danger of sticking; and that the sprays may be instantly placed in operation without heating or other preliminary treatment. It is also believed apparent that damaged or worn valves may be exchanged with a minimum amount of Work and may be adjusted to accurately control the line of coverage for maintaining the coverage constant completely across the roadway.

What I claim and desire to secure by Letters Patent is:

l. A spray valve including a housing having a bore provided with elongated ports of dierential capacity communicating the bore with the housing exterior, said ports being elongated substantially circumferentially of said housing bore, a valve member having a head rotatable in the housing bore, one end of said head being adjacent a uid supply and having a slot originating in said end of the head and arranged in angular relation to the elongated ports in the valve housing to register with one of said ports at one position of the valve member, and means for changing the effective position of the respective ports of said valve housing.

2. A spray valve including a valve housing provided with a bore having a conical seat and an arcuate slot intersecting said seat to provide a spray opening communicating with the bore from the housing exterior, a valve having a conical head rotatably mounted on said seat, one end of said conical head being adjacent a fluid supply and having a slot originating in said end of the head arranged in angular relation to the slot in the valve housing for forming a flow passage, said valve being provided with a stem projecting from said housing, an operating lever on the stem, and a spring engaged between a valve housing and the operating lever to retain the head of said valve in'sealing contact with said seat.

3. A spray v-alve including a valve housing providing-with a conical seat and an arcuate slot intersecting said seat to provide a spray opening, a valve having a conical head rotatably mounted on said seat, one end of said conical head being adjacent a fluid supply and having a slotl originating in s-aid end in the head arranged in angular relation to the arcuate slot and shaped to control flow through said slot for forming a flow passage, said valve being provided with a stem projecting from said housing, and an operating lever on the stem.

4. A spray valve including a housing having spaced elongated spaced ports of differential capacity arranged in angular relation to the axis of said valve housing, said ports being elongated substantially circumferentially of said housing, a valve member closing said ports having an end arranged adjacent a fluid supply, said valve member having a slot originating in said end of the valve member forming a flow passage arranged to register with one of said ports at one position of the valve member, and an auxiliary member rotatably mounted on the valve to selectively adjust the opening of certain of the spaced diierential ports.

5. A spray valve including a housing having a bore provided with elongated ports of differential capacity communicating the bore with the housing exterior, said ports being elongated substantially circumferentially of said housing bore, the valve member having a head rotatable in the housing bore, one end of said head being adjacent a fluid supply and having a slot originating in said end of the head and arranged in angular relation to the elongated ports in the valve housing to register with one of said ports at one position of'the valve member, means for changing the eiective position of the respective ports of said valve housing, and means rotatable on the housing for selectively covering a portion of the selected ports to trim the spray of material issuing therefrom.

6. A spray valve including a valve housing provided with a bore having a conical seat and an arcuate slot intersecting said seat to provide a spray opening communicating with a bore from the housing exterior, a valve having a conical head rotatably mounted on said seat, one end of said conical head being adjacent a fluid supply and having a slot originating in said end-of the head arranged in angular relation to the slot in the valve housing for forming a flow passage, said valve being provided with a stem projecting from said housing, an operating lever on the stem, a spring engaged between the valve housing and the operating .lever to retain the head of said valve in sealing contact with said seat, and means rotatably mounted on the housing for selectively covering a portion of the arcuate slot to trim the spray of material issuing therefrom.

7. A spray valve including a valve housing having a conical seat and an arcuate slot intersecting said seat to form a spray opening, a valve having a conical head rotatably mounted on said seat, one end of said conical head being adjacent a uid supply and having a slot originating in said end of the head and arranged in angular relation to the slot in the valve housing for forming a passage shaped to restrict the flow adjacent the edges of the arcuate slot in the valve'housing to form a spray of material having a greater discharge at the center of said spray than at the edges, said valve being provided with a stem projecting from said housing, and an operating lever on the stem.

8. A spray bar for asphalt and the like having a series of laterally arranged spray valves, each having a bore provided with an arcuate slot to 10 form a spray opening communicating the bore with the valve exterior, valve members rotatable in the bores having ends adjacent a uid supply and each having a slot originating in said ends of the valve members arranged in angular relation to the slot in each valve housing for forming flow passages whereby fan-shaped overlapped sprays are delivered by the spray valves of the spray bars, and means rotatable on selected spray valves adjacent the end of the spray bar for selectively covering a portion of the arcuate slots of said valves to trim the spray of materials issuing therefrom.

HORACE A. CARTWRIGHT.