US2469818A - Diaphragm pump - Google Patents

Description

May 10, 1949 c. A. ERICKSON 2,469,818

DIAPHRAGM PUMP Filed Oct. 28, 1946 2 Sheets-Sheet 1 if 77 W9 May 10, 1949. c. A. ERICKSON 2,469,818

DIAPHRAGM PUMP Filed oct, 28, 194e z sheets-sheet 2 74 v73 41 SI I@ j /2\\: I4? :@s?

y of the pump;

Patented Moy.10, .1949

UNITI-:D s'rArEsPArEN'r OFFICE DIAPHRAGM PUMP Charles A. Erickson, Dearborn, Mich., assignor, f, by mcsnel assignments, to F. L. Jacobs4 Co., De- 'troit, Mich., a corporation oi Michigan Application October 28, 1946, Serial Np. 706,113

pump and particu- The invention isillustrated more or less dia-r grammatically in the accompanying drawings, wherein:

Figure 1 is a vertical section through one form Figure 2 is a ure 1;

Figure 3 is a vertical section of a modified form of pump;

plan view of the pump of Fig- 1 Claim. (Cl. 103-150) Figure 4 isa section taken at line 4 4 of Fig- A prises a housing which is preferably made invitwo pieces or sections. As shown, there is an upper housing member I provided with an inlet passage 2 which may be threaded as at 3 to receive a conduit. The inlet passage 2 communicates with a central inlet passage 4 which is formed within an annular member 5. An 'annular chamber 6 is formed within the housing about the member 5 and comprises a pressure dome. An outer wall 1 encloses the annular pressure dome chamber 6. An outlet passage 8 is formed in the wall 1 and may be threaded as at 9. The housing wall 1 is preferably enlarged or ilared outwardly as at I9 and may be provided with an innercurved face or surface II. The annular wall 5 is preferably provided' with a reduced downward extension I2 which, at its upper end, terminates in an internal shoulder I3 and on its outer surface terminates in an external shoulder I4. -A ilange I6 is formed as a part of the housing member and may carry one or more ears I1 to receive fastening members, such as screws, I9 for joining the upper housing section to' a lower'housing section. 'Ihe lower housing member is designated generally by the' numeral I9 and may include a ange 29 with ears 2i in which the screws I3 are received. The iiange 20 and the ange I 6 are so dimensioned that the ange I6 Vmay t within the ange 20. The housing member I9 may be perforated as at 22 to permit the escape of liquid should any enter the housing. A downward extension 23 from the housing I9 provid a space for operating means which will be described below. The member 32 extends laterally as at 33 and is open as at 34 to permit the entrance of and positioning of operating means. 'I'he portion 33 may be of any desired shape to furnish means whereby the pump may be attached to a suitable mounting or support.

A valve supporting and positioning member 35, as shown-in Figures 1 and 5, may be shaped to correspond somewhat to the curvature Il of the member I9, and Ait terminates in a flange 36 shaped to `extend beneath ,the flange I6 of the upper housing member and shaped also to it withinthe flange 20 of the lower housing member. The member is provided with a generally attened portion 31 perforated es at 38. About each of the perforations38 is a raised portion 39 comprising a valve seat. A valve ring 40 is positioned about the member I2 above the openings 38, within the lower portion of the annular space 6 and is adapted to be seated against the valve seats 3 9 to close them. A spring 4| bears at one end against the shoulder I4 and at' the other end against the valve 40 'and is biased to seat the valve.

The member 35 is also provided with a generally central upward extension 42 which terminates at its upper end in a valve seat 43 and which is cut away in one or more places as at 44. A packing or sealing member 45 may be positioned about the upward extension 42. A valve 46 is positioned within the space defined by thermember I2 and above the extension 42. A spring 41 is positioned Vto be seated against a seating member 48. Ths

A packing member 49 may be positioned above the flange 35 and below the flange I6.

A diaphragm rod 50 is positioned to move within the housing I9and to extend into the space 'defined by the housing portion 32. Fixed to it is a diaphragm 5I which is gripped at its edge by the flange 36 and the ange 20 when the two housing sections are joined together. Stiffening discs 52 and 53 are secured respectively above and belowV the diaphragm 5I and are fastened to the member 50 by a rivet, screw or other attaching member 54.

At its lower end, the member 59 may be headed means may be positioned on the member-59 to act as a cushioning and silencing means.

The rocker'arm or lever is provided 'with a sup-f I port Si which is held in a bearing 82 by a retaining member 03. This member is, itself, removably held in place in the lower housing section by a screw 6I or otherwise. The 'rocker arm may be of any desired shape; as shown in Figure 1, it is upwardly shaped as at 65 and carries a cam contacting member 88 which is adapted to contact a cam 61 or amv other desired operating means.

If desired, a sealing means may be providedv about the rod 50. This means includes packing or cushioning members 68 which lit 'tightly in contact with the member 50 and are held in place by enclosing parts 89. In the particular form shown in Figure 1, the parts 69 serve also as a seat for the lower end of the operating spring 10. The upper end of this spring is in contact with the stiifener 53 beneath the diaphragm 5l. The spring 10 is biased to hold the diaphragm in the raised position.

The modified form of Figure 3 is generally the same as that described above, and only so much will be re-described'as diiers from the structure above described. The pump housing, the valve supporting means and the other parts are substantially the same. The inlet passage member 1| is extended and is longer than the inlet passage member 2. At its outer end it is threaded as at 12 to receive a conduit. Within the passage member 10 is a directing means 13 which directs entering iiuid downwardly through the passage 14 into the bowl 15. The bowl is supported on the member 1I and is removably held in place by a bail 16, which is provided with a tightening thumb nut 11 against the holding 4 makes sure that the dome will remain clear of liquid and will remain effective. l

'I'he valve assembly member which includes the portions dening the outlet valve seats, the member for limiting the inward movement of the inlet valve and meanslfor engagement between the two housing members is a unit, and may be made by stamping, spinning or any other desired manner. Because it. is a unitary member it insures accurate positioning of the various inlet and outlet valve passage and members in assembly and simplifles assembly of the total device. It is not necessary to carry out individual seating or adjustment of various valve members in the assembly of the device. Similarly,`when the device is taken apart for cleaning or repair and is reassembled, both operationsA are simpliiled and made more certain and accurate by reason of the fact that the member which positions and denes the inlet and outlet openings to and from I the pumping chamber is a unitary member.

In the modified form the construction of the pump proper is the same as that disclosed in the member 'I8 to hold the bowl tightly in position.

cent the engine, for example, on the crankcase,

and the rocker arm or operating lever is placed where it can be operated by a' rotating member, such as the cam shaft. It is connected to a source of liquid and the outlet or discharge side is connected to a carburetor or other point of use, When the -cam shaft rotates the pump diaphragm is moved up and down through the linkage shown 'and produces alternate suction and discharge strokes. As the diaphragm is drawn downwardly liquid is drawn through the inlet passage and the inlet valve is unseated and moved downwardly to permit the entrance of liquid.

The suction which causes the liquid to enter also holds the outlet valve seated on the several outlet valve seats. When the diaphragm, is raised.

dome is effective and its operation is made sure guiding means, while, permitting liquid to move outwardly through the outlet valve openings which prevents illling of the vapor dome and thus earlier flgures. The only dierence is the provision of a bowl which may be transparent. For

example, it may be made of glass. The bowl permits a user by inspection, without taking the device apart to check the operation of the pump and to check the condition of the liquid moving to the pump.

The features above discussed can. be embodied in a pump with or without the stuffing box mechanism shown and can be embodied in a pump arranged with any desired'rocker arm or operating lever. The invention is not limited, therefore, to the particular means shown for reciprocating the diaphragm. While the pump itselfwill ordinarily be made of metal, it may be made of any material.

I claim:

In combination in a liquid pump, a pair of housing members and means for securing them releasably together, one of said housing members shaped to fit within the other, inlet and outlet passages formed in one of said housing members. and an annular integral pressure dome formed within said housing member and positioned concentrically with a portion of said inlet passage, a unitary member including a central inlet, and a plurality of outlet valve seats positioned about said inlet, said unitary member Aprovided with a portion adapted to'be gripped and held between said housing members. a ring-like valve member positioned adjacent to and adapted to be seated upon said outlet valve seats, said outlet valve member shaped of rigid material, and a spring biased to hold it seated, said outlet valve member being guided by a portion of the housing member within which said inlet passage is formed, and an inlet valve positioned to be seated to close said inlet, and a spring biased normally to hold said inlet valve closed.

CHARLES A. ERICKSON.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Name Date 986,122 Astrom Mar. 7, 1911 2,016,580 Schulze et al. Oct. 8, 1935 2,080,392 Rockwell May 11, 1937 2,139,347 Babitch et al. Dec. 6, 1938 2,382,797 Longan Aug. 14, 1945

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