US2705093A

US2705093A - Pumps

Info

Publication number: US2705093A
Application number: US457480A
Authority: US
Inventors: Ray L Carter
Original assignee: Car-Wel Corp
Current assignee: Car-Wel Corp
Priority date: 1954-09-21
Filing date: 1954-09-21
Publication date: 1955-03-29
Anticipated expiration: 1972-03-29

Description

INVENTOR. RAY L. CARTER ATTNEY R. L. CARTER PUMPS Filed Sept. 2l, 1954 March 29, 1955 United States Patent O PUMPS Ray L. Carter, Phoenix, N. Y., assignor to Car-Wel Corporation, Phoenix, N. Y., a corporation of New York Application September 21, 1954, Serial No. 457,480

3 Claims. (Cl. 222-333) may be quickly refilled while the contents thereof are maintained as free as possible from exposure to outside atmosphere.

The present invention is directed to a pump in which the displacement piston and cylinder are adapted to be located in the bottom of the reservoir and in which the cylinder support comprises a rigid column member aligned with the piston, to provide for accurate displacement of measured quantities of liquid upon each actuation of the pump piston. The invention also has to do with a rigid construction for housing a solenoid for aci' tuating the pump and the adaptation of such a pump for reliable commercial use. Further the submerged pump is so constructed as to displace a minimum of the contents of the reservoir, whereby the reservoir may have a maximum capacity for its size, and will not likely overflow when refilled and replaced for use.

The above and other novel features of the invention will appear more fully hereinafter from the following detailed description when taken in conjunction with the accompanying drawings. It is expressly understood that the drawings are employed for purposes of illustration only and are not designed as a definition of the limits of the invention, reference being had for this purpose to the appended claims.

In the drawings, wherein like reference characters 1ndicate like parts:

Figure l is a longitudinal sectional View through the pump reservoir and solenoid chamber;

Figure 2 is a longitudinal section through the solenoid chamber taken substantially on the line 2 2 of Figure l;

Figure 3 is a transverse section through the submerged column taken on the line 3-3 of Figure l; and

Figure 4 is a section through the submerged check valve taken on the line 4 4 of Figure l.

In Figure l, there is shown a cup-like solenoid housing member having a substantially cylindrical wall 12 and an annular integral bottom wall 14. Secured to the bottom wall 14 is a pump assembly generally indicated at 16, comprising an integral plate 18 and depending column member 20, the latter having an integral foot 22 at the lower end thereof. The plate 18 has an annular marginal flange 24 at the upper edge 26 of which seats upon the bottom 14 of the housing member 10, and a depending portion 28 of which is internally threaded to receive a glass reservoir 30. The housing member 10 is secured to the plate 18 by screws 32. The housing member 10 is provided with a cover plate 34 secured in place by screws 36. The cover plate on its underside is provided with integral solenoid mounting members such as 38 and 40 which are adapted to be secured to the arms 42 and 44 of the magnetic yoke 46 of a solenoid.

The column member is of U section and the circular portion thereof is concentrically disposed around an elongated pump piston rod 48, the upper end of which is enlarged in diameter as at 50 and reciprocates within a bushing 52 in the plate 18. The lower end of the piston reservoir 30 2,705,093 Patented Mar. 29, 1955 rod projects into a pump cylinder 54, having the general form of a thimble, such cylinder being mounted in a bore 56 in the foot 22. Inlet ports 58 and 60, the latter being plugged as at 62, permit ow of liquid from within the reservoir 30 into the pump cylinder 54 at a point somewhat below the lower end of the piston rod 48 when the rod is in the upward retracted position. An inclined outlet port 64 connecting with the bottom of the cylinder 54 is provided with a ball check valve 66, the ball 68 of which seats on an annular shoulder' 70. The port is connected by a tube 72 to an angular port 74 formed in a thickened portion 76 of the plate 18, such port having a portion extending radially outward and being provided with a ball check valve 78. The outer end of the port is fitted with a suitable adhesive spray nozzle such as 80. The entire pump is adapted to be mounted with the spray nozzle suitably located in conjunction with the material to be coated with adhesive.

The plate 18 is also provided with an angular inlet port 82 located in a thickened portion 84, so as to admit air into the reservoir to compensate for the uid contained therein as it is displaced.

The solenoid comprises a T-shaped armature 86 adapted to reciprocate between the parallel magnetic arms or pole pieces 42 and 44 of the core 46. The stem 88 of the armature is provided with a blade-like extension 90 which projects through a slot 92 in the core 46, the lower edge of which blade bears against the head end 94 of the piston rod 48. The armature 86 in its upper position engages an abutment 96 formed integral with the cap 34, and its range of travel downwardly is limited by the engagement of the end faces 98 and 100 of the stem of the armature with blocks 102 and 104 rigidly secured to the transverse portion of the core or yoke 46. The stem 88 is adapted to project into the winding 106. The piston rod is resiliently held in its upper position by a coil spring 108 bearing at its lower end against the bushing 52, and at its upper end to the underside of the head 94. Such spring is adapted to lift the piston rod in its return stroke, and at the same time lift the armature solenoid into engagement with the abutment 96.

-In practice, the amount of liquid displaced by the piston rod may be controlled by altering the length of the rod. Such rod in one form of the pump has a diameter of 1A" and by substituting rods of lengths varying in increments of 1/16 in length, an accurate and measured amount of liquid may be disposed with each reciprocation of the solenoid armature and the piston rod within the pump cylinder 54. It will be appreciated that the rod 48 in moving downward, closes the inlet port and thereafter forces the entrapped liquid through the check valves 66 and 78 to the spray nozzle 90.

The housing may be rigidly mounted by means of the side boss 110. With the assembly rigidly mounted, the may be readily'unscrewed for filling and replaced. There is provided a seal ring 112 adapted to engage the upper edge of the reservoir 30 when`screwed in place. The piston rod 48 and column 20 may be made of brass so as to have equal expansion characteristics and the cylinder thimble 54 may be made of stainless steel. The arms 42 and 44 of the solenoid will be secured to the

members

38 and 40 by threaded studs 114 which may be of stainless steel or other nonamagnetic material.

The operation of the pump will readily appear from the foregoing description thereof, the pump displacing an accurate measured quantity of liquid from the cylinder S4 each time the solenoid is energized. The ball check valves 66 and 78 act to keep the conduit lled and to permit the escape through the spray nozzle of only such liquid as is actually measured by the movement of the piston 48.

Although a single embodiment of the invention has been illustrated and described, it is to be understood that the invention is not limited thereto. As various changes in the construction and arrangement may be made without departing from the spirit of the invention, as will be apparet to those skilled in the art, reference will be had to the appended claims for a definition of the limits of the invention.

What is claimed is:

1. An electro-magnetically actuated pump comprising a solenoid housing and mounting member having an integral bottom wall, and side casing, a cover plate therefor, a solenoid mounted on the under side of said cover plate and depending therefrom within said housing member, said solenoid having an armature centrally disposed for vertical movement within said housing, stops associated with said solenoid for limiting the vertical travel of said armature to a lixed range of travel, a pump assembly comprising a peripherally flanged plate secured to said housing bottom wall and having an integral depending open-sided column centrally disposed thereon, said column having a pump foot on its lower end, a pump cylinder in said foot comprising a member having a cylindrical bore, closed at the bottom and open at the top, the axis of said bore being in alignment with said armature, a central aperture in said plate having a guide sleeve, a piston rod extending through said guide sleeve and having at its lower end a piston adapted to reciprocate in said cylinder, and at its upper end a head adapted to engage the lower end of said armature, a coil compression spring located between said head and sleeve for normally lifting said piston rod and armature to the upper limit of the travel of said armature, said foot having an inlet port leading to the upper end of said cylinder bore, below the lower end of said piston end, and an outlet port leading from the bottom of said cylinder bore, a port in said plate having a downwardly directed portion inwardly of and a radial portion emerging at hte peripheral edge of the plate, a conduit connecting said outlet port with the downwardly directed portion of said plate port, check valves in each of said last named ports, and a vessel adapted to house the column, foot and conduit and be detachably secured to the plate flange.

2. An electro-magnetically actuated pump comprising a solenoid housing and mounting member having an integral bottom wall, and side casing, a cover plate therefor, a solenoid mounted on the under side of said cover plate and depending therefrom within said housing member, said solenoid having an armature centrally disposed for vertical movement within said housing, means for limiting the vertical travel of said armature to a lixed range of travel, a pump assembly comprising a peripherally flanged plate secured to the base of said bottom wall and having an integral depending open-sided column centrally disposed thereon, said column having a pump foot on its lower end, a cylinder bore in said foot closed at the bottom and open at the top, the axis of said bore being in alignment with said armature, a central guide aperture in said plate, a piston rod extending through said guide aperture and having at its lower end a piston adapted to reciprocate in said cylinder bore, and at its upper end a head adapted to engage the lower end of said armature, means for normally lifting said piston rod and armature to the upper limit of the travel of said armature, said foot having an inlet port leading to the upper end of said cylinder bore, below the lower end of said piston end, and an outlet port leading from the bottom of said cylinder bore, conduit means extending from said outlet port to the peripheral edge of said plate including a check valve, and a vessel adapted to house the column, foot, and conduit and detachably secured to said plate.

3. An electro-magnetically actuated pump comprising a solenoid housing and mounting member, a solenoid mounted within said housing member, said solenoid having an armature centrally disposed for vertical movement within said housing, means for limiting the vertical travel of said armature to a fixed range of travel, a pump assembly comprising a plate secured to the underside of said housing and having an integral depending open-sided column centrally disposed thereon, said column having a pump foot on its lower end, a cylinder bore in said foot closed at the bottom and open at the top, the axis of said bore being in alignment with said armature, a central guide aperture in said plate, a piston rod extending through said guide aperture and having at its lower end a piston adapted to reciprocate in said cylinder bore, and at its upper end a head adapted to engage the lower end of said armature, a coil compression spring located between said head and guide aperture for normally lifting said piston rod and armature to the upper limit of the travel of said armature, said foot having an inlet port leading to the upper end of said cylinder bore, below the lower end of said piston end, and an outlet port leading from the bottom of said cylinder bore, a port in said plate having a downwardly directed portion inwardly of and a radial portion emerging at the peripheral edge of the plate, a conduit connecting said outlet port with the downwardly directed portion of said plate port, check valves in each of said last named ports, and a vessel adapted to house the column, foot and conduit and be detachably secured to the plate.

No references cited.

Claims

1. AN ELECTRO-MAGNETICALLY ACTUATED PUMP COMPRISING A SOLENOID HOUSING AND MOUNTING MEMBER HAVING AN INTEGRAL BOTTOM WALL, AND SIDE CASING, A COVER PLATE THEREFOR, A SOLENOID MOUNTED ON THE UNDER SIDE OF SAID COVER PLATE AND DEPENDING THEREFROM WITHIN SAID HOUSING MEMBER, SAID SOLENOID HAVING AN AMATURE CENTRALLY DISPOSED FOR VERTICAL MOVEMENT WITHIN SAID HOUSING, STOPS ASSOCIATED WITH SAID SOLENOID FOR LIMITING THE VERTICAL TRAVEL OF SAID ARMATURE TO A FIXED RANGE OF TRAVEL, A PUMP ASSEMBLY COMPRISING A PERIPHERALLY FLANGED PLATE SECURED TO SAID HOUSING BOTTOM WALL AND HAVING AN INTEGRAL DEPENDING OPEN-SIDED COLUMN CENTRALLY DISPOSED THEREON, SAID COLUMN HAVING A PUMP FOOT ON ITS LOWER END, A PUMP CYLINDER IN SAID FOOT COMPRISING A MEMBER HAVING A CYLINDRICAL BORE, CLOSED AT THE BOTTOM AND OPEN AT THE TOP, THE AXIS OF SAID BORE BEING IN ALIGNMENT WITH SAID ARMATURE, A CENTRAL APERATURE IN SAID PLATE HAVING A GUIDE SLEEVE, A PISTON ROD EXTENDING THROUGH SAID GUIDE SLEEVE AND HAVING AT ITS LOWER END A PISTON ADAPTED TO RECIPROCATE IN SAID CYLINDER, AND AT ITS UPPER END A HEAD ADAPTED TO ENGAGE