US1847457A - Combination fuel pump and crank case ventilator - Google Patents

Description

March 1, 1932. B. H ZEIBIG ET AL COMBINATION FUEL PUMP AND CRANK CASE VENTILATOR Filed May 25, 1929 Patented Mar. 1, 1932 UNITED STATES PATENT OFFICE BRUNO HENRY ZEIBIG AND JOSEPH ZUBATY, 0F FLINT, MICHIGAN, ASSIGNORS TO A C SPARK PLUG COMPANY, OF FLINT,

MICHIGAN, A COMPANY OF MICHIGAN COMBINATION FUEL PUMP AND CRANK CASE VENTILATOR Application filed Kay 23,

This application relates to fuel pumps suitable for use in connection with automotive engines, and the like; and more particularly to fuel pumps which are directly applied to crankcases in such manner as to permit the operation of said pumps by means of levers or like reciprocable members extending into said crankcases; and the invention aims more particularly to obviate any accumulation of moisture or other condensates within said fuel pumps. It may also aid in temperature control.

Other objects of the invention (which may ordinarily rely upon the principle of the venturi and may serve for the ventilation of crankcases as well as fuel pumps and/or may incidentally provide for a conduction of vapors containing gasoline, or the like, to a manifold or other remote part) may be best appreciated from the following description of illustrative embodiments of said invention, taken in connection with the appended claims and the accompanying drawings.

Fig. 1 is. for the most part. a vertical section through the body of one popular type of fuel pump. as this may be modified to embody or illustrate the present invention.

Fig. 2 is a view taken substantially as indicated by the line 2-2 of Fig. 1. but showing features of modification hereinafter referred to.

Fig. 3 is a detail view. corresponding to a lower right-hand portion of Fig. 1, but showing other features of modification.

Fig. 4 is a vertical sectional view; corresponding to a lower portion of Fig. 1. but suggesting an alternative and removable form of the Venturi device.

Fig. 5 is a view comparable with Fig. 4, but showing a Venturi device somewhat like that of, Fig. 4 as differently oriented. and showing also an optional pipe connection.

Conventional parts of the organization illustrated in Fig. 1 include a reciprocatory pumping elementin the form of a diaphragm 10. shown as retained between amain struc tural element 11 in the form of a pump body. and a subsidiary structural element 1:?,providing a pump chamber 13 and also servingto support a fuel filtering unit 14.

1929. Serial No. 365,533.

The subsidiary structural element 12 may pumping element, may be normally advanced (subject to any pressure built up in the pump chamber 13) by resilient means such as a spring 26,-shown as engaging the cupped element 22 and a fixed stop :27; and pressuredetermined or otherwisevariable intake strokes may be imparted thereto ,(from, for example, an actuating element such as a lever 28, engaging a cam 29 within a crankcase 30) through a thrust-refusing connection such as a pair of links 31 and 32 shown as centrally interconnected by a pivot and as terminally connected, by additional pins 34, 35, to the handling element 20 and to aninner end or arm 28 of the lever 28. Alignment of the pins 33, 34 and 35 may be prevented by means such as a stop 36, on the links 32, tangentially or otherwise engaging a cooperating face upon the link 31; and the lever 28 may be constantly pressed into engagement with the cam '29, or its equivalent, by means such as a compression spring 36', shown as confined between a cupped bottom plate 37 and an oppositely cupped element 38, engaging a projection 39 upon the lever arm 28'. Said lever is shown as pivoted upon a pin 40, in bearing openings 11, 41, extending at right angles to an opening 12, leading from the interior of the crankcase into a lower compartment 43 of the pump body 11.

Coming now to the more novelfeatures shown in Fig. 1. a small opening 41 being optionally provided for the admission of air into the mentioned compartment 43, some suitable plug. 45, formed of felt or the like, may be inserted in the opening 42, and saturated, or permitted to become saturated. with oil. In the embodiment here referred to, the plug 45, assumedto have been provided with an opening for pin 40, is shown as inserted past a conical surface 48. Said plug may be resiliently compressed during its insertion and it may seat against a collar 49,- optional- 1y cast integral with the body 11. A Venturi organization/16, communicating with additional opening 47, is shownas comprising a funnel-shaped intake element 50,and a similar but smaller exit element 51,these being connected by a passage 52 with which the menwhich the pin extends is shown at 53, in j Figs. 1 and 2, as substantially cylindrical in general form, its cylindrical axis'being at right angles to that of the pin 40; and the plug may be correspondingly apertured and/or formed in separate sections adapted to be assembled in the manner above implied. The pin-receiving portion 53a of the alternative organization shown in Fig.3 is

generally spherical in form; a plug comprising like sections 450 and 45a may be retained between washers 54d and 55a; and, assuming the former to engage a fixed stop 49a, wash er 55a vmay resemble somewhat a Welch plug in themanner of its insertion pasta conical or other surface 48a and/or mto a groove 56a, if provided.

In the form shown in Fig. 4, the provision of opening 44?) and the use of a plug in the opening 42?) being alike optional, the bottom plate or spring-receiving cup 37?) is shown as carrying, or as modified to constitute, a Venturi organizationincludin'g a funnel element 506 having a constricted passage 52b with which an opening 47?) communicates,the result being a withdrawal of air, vapors, or the like, therethrough.

In Fig. 5, in connection with which it may be assumed that the direction of advance, in

view of the position of attachment of the pump body 110, is unfavorable to the use of a funnel positioned in the manner of funnel 50 as in Figures 1 and 2 or funnel 5015 as in Figure 4:; and opening 470 is shown as having connected therewith an air-circulating pipe 57c,whieh may lead to an engine manifold, or other remote part adapted to utilize any fuel values in the withdrawn air or vapors; or, alternatively, air may be admitted through the pipe 570 and permitted to exit through opening 440, opening 420 and/or an,

opening 47c,the latter leading into a Venturi passage 520, shown as extending at right angles to the passage 5%, illustrated in Fig. 4. To facilitate its attachment at anydesired angle, the plate 3760 may be provided with equidistant openings for screws 550, or equivalent means; and it will be understood that it suflicient oil saturation of the mentioned plugs, if they are used, may result from their position of use. They should be resilient; but need not be impermeable.

In Fig. 1 and Fig. 2, attention may be called to the optional provision of removable plugs 56, 56 in openings 44, 57, to permit the connection of an air delivering or air withdrawing pipe, such as is shown at 57c,the Venturi organization 46 being then rendered inoperative in favor of circulation through said pipe; and it is obviously possible to utilize a Venturi bottom plate, of .the type shown in Figs. 4 and 5, in connection with other parts shown in any of the mentioned figures. All forms of the invention being adapted to ventilate a pump body, the incidental ventilation of a crankcase and the utilization of vapors should be regarded as optional.

Although the foregoing description has included mention of but a limited number-of the embodiments ofthe present invention, it will be seen not only'that various features thereof might be independently used, but also that numerous modifications, additional to those suggested, might easily be devised by workers skilled in the art to which this case relates,-all without involving departure from the scope of the present invention.

We claim:

1. In a combination: a fuel pump body attached to a crankcase; and means for ad vancing air through said body to ventilate the same,said means comprising 'a Venturi organization secured to said body.

2. In a combination: an engine crank case,

a fuel pump body attached thereto; and means for advancin air through said body,there being a closa le passagebetween said crankcase and said body and an additional air passage communicating with the interior of said body.

4. In a combination: a fuel pump body suitable for attachment to a'crankcase; and means for advancing air through said body, said means including a Venturi funnel cast integral with said body. e I

'5. In a combination: a fuel pump body suitable for attachment to a crankcase; and means for advancing air 1 through said body,said means including a venturi which is separate from said pump body.

6. In 'combination: an engine crankcase, a fuel 1pump comprising a body attached to said cran operating lever for said pump pivoted to said pump body and extendin through said opening; and a-closure there or.

7 In combination: a fuel pump compriscase and having an opening thereto; an

ing a body suitable for attachment to a crankcase and having an opening thereto, an operating lever for said pump extending through said opening, and permeable means for closing said opening.

8. In combination: a fuel pump comprising a body suitable for attachment to a crankcase and having an opening thereto, an operating lever for said pump extending through said opening, and resiliently yieldable means for closing said opening.

9. A fuel pump comprising a diaphragm pump element, a fluid pumping chamber on one side of the diaphragm; and means for the withdrawal of vapors from the other side of the diaphragm, for utilization elsewhere.

10. In combination: a fuel pump comprising a body suitable for attachment to a crankcase and having an opening thereto, an opcrating lever for said pump extending through said'opening, and resiliently yieldable means for closing said opening, said lever being there substantially circular in cross-sectional outline.

- 11. In a fuel pump, a diaphragm, a fluid pumping chamber above said diaphragm,

and a chamber below said diaphragm housing operating connections thereto, and means to advance air through said latter chamber to ventilate the same.

12. In a fuel pump assembly, an engine crankcase, a fuel pump attached thereto comprising a reciprocable diaphragm for advancing fuel, and an operating lever for said diaphragm extending into said crank case through an opening therein, and means to advance air through said fuel pump independently of the' advancing fuel to ventilate the pump and withdraw vapors from said crank case.

13. In a fuel pump, a pumping member, a fluid pumping chamber on one side of said pumping member, a chamber on the other side of said pumping member housing operating connections thereto, and means to advance air through said latter chamber to ventilate the same. p

14:. In a fuel pump assembly, an engine crankcase, a fuel pump attached thereto comprising a pumping member for advancing fuel and operating means for said pumping member, a portion of said fuel pump communicating with the interior of said crankcase, and means to advance air through said fuel pump to ventilate the pump and withdraw vapors from said crankcase.

In testimony whereof We aflir our signatures. 60 BRUNO HENRY ZEIBIG.

JOSEPH ZUBATY.

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