US1935688A

US1935688A - Spraying device

Info

Publication number: US1935688A
Application number: US459158A
Authority: US
Inventors: Peter L Wilbur
Original assignee: WIL X M F G CORP
Current assignee: WIL X M F G CORP; WIL-X-M'F'G Corp
Priority date: 1926-11-27
Filing date: 1930-06-04
Publication date: 1933-11-21
Anticipated expiration: 1950-11-21

Description

l Nav. 21, 1933.

P. L. WILBUR SPRAYING 'DEVICE Filed June 4, 1930 2 Shee-ts-Sheet l P. L. WILBUR SPRAYING DEVICE Nov. 21, 1933.

Filed June 4, 1930 2 Sheets-Sheet 2 Patented Nov. 21, 1933 Y 1,935,688 SPRAYING DEVICE Peter L. Wilbur, Tuckahoe,

Wil-X-MFG Corporation,

New York N. Y., assignor to 'a corporation of Original application November 27, 19726, Serial Divided and this application June 4, 1930. Serial No. 459,158

19 Claims.

This invention relates to spraying devices which may be used as a fire extinguisher or a sprayer for insecticides in which a stream of liquid is ejected from a container or reservoir by pressure, such as a uid pressure applied to the liquid in the container or by withdrawing and discharging the liquid from the container by a. pumping mechanism, the present application being a division of my application Serial No. 151,071.

It is the primary object of the invention to provide a device oi this character wherein the pumping mechanism is adjustably mounted upon the exterior of and in communication with the interior of the container, which pumping mechanism in the operative` position thereof is adapted to extend laterally of the container, and in the inoperative position'thereof to be folded to lie in contiguous relation to the container to form a compact structure to be readily stored and transported.

It is a further object of the invention to provide a spraying device of this character wherein the connection of theA pumping mechanism with the container is through the pump mounting on the container, the arrangement being such that the connection between the pumping mechanism and the container is open in the operative position of the pump and closed in the inoperative position of the pump so that in the latter position the containeris closed to the atmosphere.

It is another object of the invention to provide a spraying device of this character wherein the pumping mechanism is arranged to inject and create an air pressure within the container to exert an expelling force upon theliquid in the container, the containerbeing arranged with outlet means adapted to be open to the atmosphere and the pumping mechanism connected with the Vcontainer in the loperative position of the pumping mechanism, said outlet means being closed and the container shut off from the atmosphere,` and the connection of the pumping mechanism with the container shut ofi, in the inoperative position of the pumping mechanism'.

Other objects and advantages will hereinafter appear. g

In the embodiment of the inventionillustrated in the drawings there is provided a pumping mechanism of the reciprocatory piston type to create an air pressure in the containerv or reservoir as the expelling container having a check valve controlled air inlet passage intoand a liquid outlet passage from the container through a pump supporting force for the liquid, the

and mounting member or bracket xed upon the container, the pumping mechanism being xed to a supporting member having a passage therethrough in communication with an air outlet port or ports vfrom the pump cylinder and the vpump carrying discharge means in communication with said passage through the pump supporting member and by means of which supporting member the pump mechanism is pivotally mounted upon the pump supporting bracket' upon the container. Thepassages in the pump supporting'member, as the pumping mechanism is moved to operative position, are automatically placed in communication with the air inlet passage and liquid outlet passage inthe supporting bracket, and as the pumping mechanism is adjusted or moved to inoperative position the air inlet and liquid outlet passages through the supporting bracket are automatically closed to shut 01T the container from the atmosphere, means being provided to yieldingly and releasably retain the pumping mechanism in either its operative or inoperative position.` f j s In the drawings accompanying and forming a part of this specificationl have shown an embodiment of the inventioniin which Figure 1 is a longitudinal sectional View taken on the line 1-1 of Figure 2 looking in the direction of .the arrows and showing means for connecting the outlet means from the container with the liquid in the lowermost part thereof and the pumping mechanism in ihe inoperative'position.

Figure 2 is an elevational view looking at the right of Figure l. 5 l Y Figure 3 is an end elevation looking at the top of FigureV 1, with the operating handle for the pump removed.

Figure 4 is a side elevation of the upper portion of the container and showing the pumping mechanism in operative position. Y

Figure 5 is a longitudinal sectional view of the pumping mechanism with the operating handle removed and showing thesame inl relation to one of the pump mounting members.

Figure 6 is a side elevation of a member for mounting the pumping mechanism upon the'container showing the arrangement of the connection whereby air may be pumped into the container and of the outlet means through which liquid may be discharged from the container.

Figure 7 is an elevational view looking at the right vof Figure 6.

Figure 8 is a plan view vlooking at the top of Figure 6.' Y

VFigure 9 is an enlarged sectional view of the shoulder of a person using `said part 19 having a connection of the container through in Figure 6.

Figure 10 is a perspective view of the supporting member for the pumping mechanism for adjustable mounting of the same upon the member shown in Figure 6.`

Figure 11 is a. cross sectional view of the mounting of the pumping mechanism on the container taken substantially on the line 11-11 of Figure 1 looking in the direction of the arrows; and

Figure 12 is a cross-sectional view of the mounting of the pumping mechanism on the container taken substantially on the line 12-12 of Figure 4 looking in the direction of the arrows.

The embodiment of the invention shown in the drawings comprises a reservoir or container 13 to contain the liquid to be discharged and in the use of the device as a fire extinguisher preferably consisting of carbon tetrachloride, said container being substantially of semi-circular form in cross section with the Wall opposite the curved wall of the container bulged inwardly, as shown at. 14 in Figure 3, to form a recess in the wall extending longitudinally thereof. The container is arranged with a ller opening in one end of the top having a removable closure cap, as at 15, and also has fixed at said end a member 16 for the connection of a looped strap 17 for engagement over the the device to readily transport the same and permit of the use of both hands in manipulating the pump and directing the discharged stream.

A bracket 18 is xed to one end of the container pumping mechanism with the the mounting member shown `in interposed relation to the inwardly bulged portion 14 and the opposite wall of the container whereby to support and adjustably mount a pumping mechanism, in the present instance of the air pressure type. This bracket has a base portion whereby it is suitably mounted upon the container in relation to an opening therein, as by soldering of threading into the opening. The base has a part 19 extending at a right angle therefrom and at one side of the axis of the disk, laterally'extending stud or projection 20 of truncated yconical form with the base at the juncture thereof with the part 19, said conical member having a threaded axial extension 21 of reduced diameter with one side flattened, as at 22, for a purpose to be hereinafter described. An outlet or passage 23 for the liquid from the container extends through the disk and connected part 19 and has al lateral extension 24 extending parallel with and at one side of the axis of the conical stud 20 terminating in anoutlet 25 through the side of said stud. (Figures 6 to 9.) The portion 24 of the passage is formed by drilling into the side of the'part 19 andthen closing theiouter end by inserting a plug 26 therein. A second port or passage 27 for the inlet of air into the container is arranged in said pump mounting member, said port extending through the. part 19 and disk in parallel relation to the port 23 at the oppositeside of the axis of the disk, with the outlet ofthe port through the disk, said port having a lateral extension 28 through the conical stud parallel'to the extension 24 of port 23`with an inlet 29 opening through the wall of the stud diamet'rically opposite to the outlet 25 of the liquid passage. The portion 28 is formed by drilling into the vpart 19 and then closing the outer end by a plug 27. The 'outlet-of the air passage 27 is controlled by a spring influenced check valve opening into the container and closing outward therefrom. For this purpose the outlet end of the passage 27 is slightly enlarged and at the juncture of said enlarged portion with the passage is arranged a seat for a valvehead 30 carried by a stem 31 slidable in a carrier 32 of spider form threaded into the enlarged outlet of thepassage, the valve being normally urged to its seat by a spring 33 coiled about the valve stem and confined between the valve head and its carrier. The inlet through the disk to the liquid passage23 is also enlarged and has mounted therein one end of a tube 34 extending downwardly and terminating adjacent to the convexedly formed end or bottom 34 of the container for a purpose to be hereinafter described.

The pumping mechanism is of the double acting type, comprising a cylinder 35 having

heads

36, 37 fixed at opposite ends, each head having an air inlet port 38 therethrough with the outer end enlarged and with a perforate plug 39 threaded therein to provide a chamber for a check valve 40 in the form of a ball with valve seats arranged at the inner ends of each plug whereby said valves are adapted to open into and close outward from the pump cylinder. Each head also has an air outlet port 41, the outer end being enlarged and closed by a plug 42 to form a chamber between the enlarged and reduced portions for a valve 43 of the ball type closing into and opening outward from the pump cylinder. 'I'he juncture of the enlarged and reduced portions of said ports are arranged as seats for the valves and the plugs have reduced extensions projecting into the valve chamber to permit the valves to be unseated and readily seated. Lateral ports 44'and 45 communicate with the valve chambers 41 in the

heads

36 and 37. These ports are connected by a tube or passageway 71 extending in parallel relation with the pump, an opening through the side of the cylinder head 36 for a purpose to be hereinafter described. A rod 48 is slidably mounted in the head 36 by means of a stufiing box 49 and having a handle 50 fixed at the outer end. A piston is fixed to the inner end Vofthe rod 48, the piston comprising a pair of disks 51 of suitable flexible material and of a diameter greater than the diameter of the cylinder. The flexible discs are mounted on the rod with a rigid disk 52 interposed between them,

the flexible disks being clamped to the rigid disk" and secured on the rod against longitudinal movement by heads 53 of slightly less diameter than the cylinder and threaded onto the rod at the outer sides of the iiexible disks. By this arrangement as the piston is moved into the cylinder (as shown in Figure 5) the valve 40 in head 36 is unseated and air is drawn through the port 38 into the cylinder, the valve 40 in head 37 controlling the perforation in plug 39 closing said port. The valve 43 of the port 41 in head 37 is unseated, opening said port through the port 45, 47, while the valve 43 in head 36 is seated, closing the port 41 in said latter head. It will be obvious that when the piston is moved outwardly or in the opposite direction, the valve 40 in head 37 is unseated opening this end of the Acylinder to the atmosphere for the drawing of air therein, and that valve 43 also in this head is seated closing port 41therein. Simultaneously therewith the 'valve 40 in head 36 is seated closing this end of the cylinder from the atmosphere, the valve 43 likewise in this head being unseated end of the cylinder tothe port 44.

opening this

bracket

18, 19, (Figures tainer and through the placed in communication with the container by cooperating ports in another supporting 'and mounting member shown in Figure 10 which embodies a circular portion 54 having a conical opening 55 axially therethrough whereby it is rotatably mounted upon the conical stud of the

pump supporting bracket

18, 19 withl an interposed sleeve 56 of. suitable bearing material, such as Babbitt metal. A projection 57 extends laterally from the portion 54 and terminates in a portion 58 the outer surface of which has a recess 59 extending longitudinally thereof and transversely of the opening in the portion 54, said portion 58 having a circular recess to conform to the outer contour of the pump cylinder and in which the latter is secured. A passage or port 60 through the supporting

member

54, 57 has an inlet in an angular portion opening through the Wall of the opening and registering with a perforation in the bearing sleeve 56, as at 61, the outlet of the passage being through an angular portion thereof opening through the end of the part 58, as at 62. A tube 63 is connected at one end in an enlargement of the outlet 62 of passage and is in communication with the latter, said tube extending in parallel relation to the pump cylinder and having its opposite end extending through a perforation in the lateral extension of the cylinder head 37, the tube terminating in a nozzle 64 mounted at the outer side of said cylinder head.

A second passage or port 65 for the inlet of air from the pump extends through the mounting

member

54, 57 and has an outlet through an angular portion thereof through the wall of the opening 55 and a registering perforation 66 in the bearing sleeve 56 diametrically opposite the inlet 61 to the passage 60. The port 65 has an outlet 67 through the wall of recess 59 to register with the outlet port 44 in cylinder head 36 whereby communication is established with the chamber for valve 43 in said head. The passage 65 is in communication with an extension thereof extending transversely of the part 58, as at 68, said portion of the passage being formed by drilling into the side of the part 58 and-closing the outer end by a plug 69. The passage extension 68 is incommunication with a passage 70 extending ylongitudinally of the part 58 and has an opening in the end thereof contiguous to the outlet 62 of the passage 60. A pipe 71 Yis connected in an enlargement of the passage 70 and extends parallel with the pipe 63 and the pump cylinder, the pipe 71 having its other end connected to the outlet '47 of port 45 communieating with the chamber for valve 43 in the cylinder head 37. By this arrangement the pumpA cylinder at opposite sides-of the piston is connected with the container or reservoir whereby air will be injected into the container upon each movement of the piston. The Vpump carrying member 54 is secured upon its supporting stud 20 of

pump supporting member

18, 19 by a pair of nuts, (Figure 1l) as at 72, with an interposed washer 73, the perforation in the washer being of the same cross sectional form as the threaded extension 21 of the stud 20 to prevent rotation of the washer thereon.

By the mounting of the pump in this manner it may be moved from theposition indicated in Figures 1 and 2 to that shown in Figure 4. The inlet 61 to passage 60 and outlet 66 of Vpassage 65 in the mounting member 54 are so arranged that when the pump is in the Figure 4 position the inlet 61 will be in register with the outlet 25 through the wall of the stud 20, the passage 23,V 24 and the pipe 34 in the container, and the outlet 66 of the

passage

65, 70 in the mounting

member

54, 58 will be in register with the inlet 29 through the wall of the stud 20 and in communication with the passage 27 opening into the top of the container, as shown in Figure 12, and by the reciprocation of the pump piston, air will be injected into the top of the container above the liquid therein creating an expelling force upon the liquid to force it into the pipe 34 and out through'the discharge nozzle 64 connectedv to the `tube 63, the inlet to the intake pipe 34 being at all times sealed from the expelling force by the liquid in the upright position of the device.

By adjusting the pumping mechanism to the position shown in Figures 1 and 2 wherein it extends longitudinally of the container and rests in the inwardly bulged portion 14 thereof, the openings of

passages

60 and 65 through the wall of the opening 55 in the mounting member 54, as well as the perforations in the bearing will be moved out of register with the openings 25,129 through the wall of the supporting stud 20 shutting off communication with the container through the

passages

23, 24 and 27, 28 as shown in Figure 1, thereby sealing the container against" leakage of the liquid and entrance of air thereto. By the arrangement of the flattened side 22 of the threaded extension 21 of the stud 20 and correspondingly formed perforation in the wash-` er 73 no movement will be imparted to the washer through the movement of the pumping mechanism in the adjustment thereof due to frictional contact and consequently no movement is imparted to the nuts 72 which would tend to loosen or tighten said nuts. Furthermore, by the arrangement of the inwardly bulged'portion 14 of the container Wall for the engagement of the pump in the inoperative position thereof the pumping mechanism will beV protected from injury should the device be dropped.

The pumping mechanism is retained in its adjusted position by a detent 75 formed of resilient wire bent at a right Aangle with one end arranged with an eye for the engagement of a screw 76 (Figure 4) projecting into the member 19 (Figure 6) of the pump support on the container. The other end of the detent extends through an elongated opening 78 in said members 19 for engagement of either one of a pair of

notches

79, 80 arranged at the extremities of an undercut segmental portion 81 in the peripheral wall of the member 54 of the pump mounting member. 1

To facilitate the withdrawing of the pumping mechanism from the recess formed by the inwardly bulged portion of the container it is arranged with a finger clip 82 (Figures 1 and 2).

To lock the piston in its innermost position the operating handle has lips 83 extending diametrically opposite therefrom to be engaged by a rotary motion of the handle below inwardly extending portions of lugs 84 extending longitudinally from the end of the cylinder head 36.

Having thus described my invention, I claim:

1. In a spraying device, a liquid carrying container having a discharge outlet, a pump, including means to adjustably mount the pump upon the container to extend longitudinally of and contiguous to the container or to extend'laterally thereof, comprising a member fixed upon the container having a laterally projecting stud with a passage therethrough opening into'the container and through the wall of; the stud, and a second memberv upon which member the pump is xed havingan opening for rotatable engagement upon the stud ofthe rst member and said second rmember having a passage therethrough with an outlet in the wall of the opening and an inlet in communication with the pump outlet, said pump being adapted to be adjusted to extend transversely of the container and in saidv position place the passage through its second member in communication with t-he passage through the rst member upon thecontainer to open communication between the pump and container, and when adjusted tolie contiguous to the container to move said passages out of communication and shut off the container through the passage in the first member on the container.

2. A spraying device as claimed in claim 1, wherein thedischarge outlet is through a passage in the first member on the container said passage having its inlet in communication with the container and its outlet opening through the wall of the stud, a nozzle carried at the outer end of the pump in communication with a passage through the second member, said second passage having an inlet opening through the wall in the opening of said member adapted to be placed in communication with the passage through the stud when the pump is adjusted to extend transversely of the container, and out of communication with said stud passage when the pump is adjusted to lie contiguous tothe container. q

3. A spraying device as claimed in claim 1, wherein a nozzle is arranged at the outer end of the pump` connected to a tube carried by the heads of and extending longitudinally of the pump cylinder, said tube communicating with a passage in the second member having` an inlet in the wallof the opening rotatably engaging the stud of the supporting member adapted to be placed in communication with an outlet passage in the stud and through the firstmember fixed upon the container communicating with the container,'arid said passage through said members adaptedv to be placed in communication when the pump is in operative position to open the container to the nozzle and when the pump is in inoperative position to shut oir the container through said passages. v

4. In a spraying device as claimedv in claim 1, a detent for retaining the pump in either of its adjusted positions, comprising a rod of resilient material bent `at a right angle and mounted Vat one end upon the first member on the container with the free end passing through an opening in,V

said rst member and adaptedto engage ina notch at the terminals of a segmental recess portion of the second member.

. 5. In a spraying device, a liquid carrying container, a, reciprocatory piston pump for discharging the liquidfrom thecontainer, a, mounting member upon one end of the container having a pair4 of passages therethrough in communication with the container, a pump supporting member arranged for the rotatable connecting thereof with-the mounting member on the container so as to permit the pump to extend longitudinally of and in contiguous relation to the container in one position and laterally of the container in another position, said pump supporting member having a pair of passages opening therethrough one of which passages is in communication with the pump, a nozzle carried by the pump in communication with the other passage through the pump supporting member, the openings of the` passages through the pump supporting member being adapted to be placed in communication with the passages through the mounting member on the container and thereby connecting l the pump and nozzle in communication with the container in one position of the pump, and saidpump supporting member in another position of the pump being adapted to shut off the passages in the pump supporting member from the passages in the mounting member and to seal the latter passages.

6. A spraying device comprising a container for liquid, a discharge nozzle therefor, a pump pivoted to the exterior of said container and having an outlet, said pivoting means comprising bearing members rotatably mounted one within the other so as to permit the pump to extend longitudinally of and in contiguous relation to the container in one position of the pump and laterally of the container in another position of the pump, an air inlet for the container, a passageway extending through said bearing members adapted to connect the air inlet of the container with the outlet of the pump, and valve mechanism operative to open said passageway to pass air to the container when the pump is in one position, and operative to close said passageway to prevent the passing of air thereto when the pump is in another position.

7. A spraying device comprising a container for liquid, a discharge nozzle therefor, an air pump pivoted upon the container by bearing members rotatably mounted one within the other so as to permit the pump to extend longitudinally of and in contiguous relation to the container in one position of the pump and laterally of the container in another position of the pump, an inlet to the container for the admission of air discharged from the pump, an outlet from the container for the discharge of liquid, a conduit between said outlet and the discharge nozzle passing through said bearing members, and valve mechanism operative to open said conduit to pass liquid to the nozzle when the pump is in one position, and operative to close said conduit to prevent the passing of liquid thereto when the pump is in another position.

8. A spraying device comprising a container for liquid, a discharge nozzle, means for pivoting a pump on said container comprising bearing members rotatably mounted one within the other so as to permitthe pump to extend longitudinally of and in contiguous relation to the container in one position of the pump and laterally of the container in another position of the pump, an air inlet to the container, a liquid outlet therefrom, a conduitbetween the pump and said air inlet passing through said bearing members, and a conduit between the liquid outletI and the discharge nozzle also passing through said bearing members, and valve mechanism operative to open said latter conduit to pass liquid to the nozzle when the4 pump is in one position, and operative to close said conduit lto prevent the passing of liquid thereto when the pump is in another position.

9. A sprayingdevice comprising a container for liquid, a discharge nozzle and an air pump pivotally connected as a unit to said container by bearing members rotatably mounted one within the other so as to permit the pump to extend longitudinally of `and in contiguous relation to the container in one position of the pump and laterally of the container in another position of the pump, an air inlet to said container, a liquid outlet therefrom, and means for conjointly establishing an Cil operative air connection between the pump and the air inlet, and an operative liquid connection between the nozzle and the liquid outlet when the pump is swung to operative position, said air and liquid connections passing through the bearing members where they are pivotally connected together.

10. A spraying device comprising a container for liquid, a discharge nozzle therefor, a pump pivoted to the exterior of said container so as to permit the pump to extend longitudinally of and in contiguous relation to the container in one position of the pump and laterally of the container in another position of the pump, and having an outlet, an air inlet for the container, a passageway extending through the pivot adapted to connect the air inlet of the container with the outlet of the pump, and means operated by the pump as it is swung upon its pivot for opening said passageway when the pump is in one position, and for closing said passageway when the pump is in another position.

11. A spraying device comprising a container for liquid, a discharge nozzle pivoted thereon, a pump pivoted to the exterior of said container so as to permit the pump to extend longitudinally of and in contiguous relation to the container in one position of the pump and laterally of the container in another position of the pump, an air inlet for the container for the admission of air discharged from the pump, a liquid outlet from the container, a passageway extending through the nozzle pivot adapted to connect the liquid outlet with the discharge nozzle, and means operated by the pump as it is swung upon its pivot for opening said passageway when the pump is in one position, and for closing said passageway when the pump is in another position.

12. A spraying device comprising a container for liquid, a discharge nozzle therefor, an air pump pivoted upon the container so as to permit the pump to extend longitudinally of and in contiguous relation to the container in one position of the pump and laterally of the container in another position of the pump, said pumphaving an outlet, an air inlet to the container, a liquid outlet from the container, a passageway extending through the pivot adapted to connect the air inlet to the container with the outlet of the pump, another passageway extending also through the pivot adapted to connect the liquid outlet with the discharge nozzle, and means operated by the pump as it is swung upon its pivot for opening said passageways when the pump is in one position, and for closing said passageways when the pump is in another position. Y

13. A spraying device in accordance with-claim 6, characterized by the fact that the passageway therein referred to passes through the bearing surfaces of the bearing members, and that the valve mechanism referred to includes the bearing surfaces of the bearing members.

14. A spraying device in accordance with claim '7, characterized by the fact that the conduit therein referred to passes through the bearing surfaces of the'bearing members, and thatvthe valve mechanism referred to includes the bearing surfaces of the bearing members.

15. A spraying device in accordance with claim 8, wherein the air and liquid conduits therein referred to pass through the bearing surfaces of the bearing members, and that the valve mechanism referred to include the bearing surfaces of the bearing members.

16. A spraying device in accordance with claim 9, characterized by the fact that the air and liquid connections therein referred to pass through the bearing surfaces of the bearing members, whereby said bearing surfaces act as valves to render the connections inoperative when the pump is in its inoperative position.

17. A spraying device comprising a container for liquid, a discharge nozzle therefor, a pump pivoted t0 the exterior of the container so as to permit the pump to extend longitudinally of and in contiguous relation to the container in one position ofthe pump and laterally of the container in another position of the pump, an outlet for the pump, an air inlet for the container, a conduit extending through the pivot, adapted to connect the air inlet of the container with the outlet of the pump, and valve mechanism operative to open said conduit to pass air from the pump to the container when the pump is in one position, and operative to close said conduit to prevent the passing of air thereto when the pump is in another position.

18. A spraying device comprising a container for liquid, a discharge nozzle pivoted thereon, an air pump pivoted upon the container so as to permit the pump to extend longitudinally of and in contiguous relation to the container in one position of the pump and laterally of the container in another position of the pump, an air inlet to the container, a liquid outlet therefrom, a conduit between the pump and the air inlet, a conduit between the liquid outlet and the discharge nozzle passing through the nozzle pivot, and valve mechanism operative to open said liquid conduit to pass liquid to the nozzle when the pump is in one position and operative to close said conduit to prevent the passing of liquid thereto when the pump is in another position.

19. A spraying device comprising a container for liquid, a discharge nozzle and an air pump pivoted upon the container so as to permit the pump to extend longitudinally of and in contiguous relation to the container in one position of the pump, and laterally of the container in another position of the pump, an air inlet to the container, a liquid outlet therefrom, a conduit between the pump and the air inlet, and a conduit between the liquid outlet and the discharge nozzle passing through the pivot, and valve mechanism operative to open the liquid and air conduits to pass liquid to the nozzle and air to the container when the pump is in one position and operative to close said conduits to prevent the passing of liquid to the nozzle and air to the container when the pump is in another position.

PETER L. WILBUR.