US1470220A - Pump - Google Patents

Description

Hat 9 1923.

w. M. FLEMING PUMP Filed Aug. 10. 1921 gflf INVENTOR BY His ATTORNEYS 1D 1: 10') rate. tea Lint.

earse rain ester...

VJILLS Iv'I. FLEMING, OF HOLYOKE, TMASSACHUSET'JS, ASSIGNOR TO NQRTHING'TON PUMP AND HTAGHINIERY CORPORATION, OF KEV] YORK, N. '1 A CORPORATION OF VIRGINIA.

PUIVIP.

Application filed August 10, 1521.

To all whom it may concern.

v3e it known that 1. ime M. FLEMING, a

citizen of the United States, residing at lzlolyolre, county of l'lampden, and State of Massachusetts, have invented certain new and useful Improvements in Pumps, fully described and represented in the following specification and the accompanying drawings, :l'orming apart of the same.

adapted for pumps of that class in which delivery is effected by pump plunger dis placement of liquid in a valved plunger chamber, andto so form and locate such priming means that it will co-operate with the suction air chamber to automatically supply at all times, except during the priming operation, in sufiicient quantity to insure satisfactory operation of the pump.

F or a full understanding of the invention, a detailed description of a preferred cmborliment thereof will now be given in connection. with the accompanying drawings. and the novel features thereof then be specifically pointed out in the claims.

In the drawings Fi snire 1 is a partial vertical. central section longitudinally of the pump plunger, and

Figure 2 is a view similar to Fig. 1, of the priming means, but showing the parts enlarged for clarity.

Referrin now to the drawin s and )arh a a ticularly to Fig. 1, the pump construction consists of the usual cylinder casting A, pump plunger B, suction and discharge valves, C, D, respectively, discharge air chamber lland pulsation chamber F. The crosshead G works in a guide 10 and is driven by any well known means, such, for example, as an eccentric connection to the main shalt (not shown Referring now to Fig. 2, the means for priming the pump and also for supplying air in sufficient quantity at all times during the operation or" the pump, except during the priming operation, consist of a receptacle or basin 1 located adjacent to the pump cylinder, such basin having an opening 2 in the bottom thereof normally closed by a plug 3, which may be a screw plug, as shown. The opening; 2, when the plug 3 is removed,

Serial No. 491,108.

is in communication with an extension 4 of the plunger chamber l7, such chamber preferably being formed as shown, that is, with a fiat top for elimination of air pockets, and an inclined bottom to facilitate flow of priming liquid. The suction air chamber H is in communication with the atmosphere through passage 5 and air sniitting nozzle 6, connecting the priming basin 1 and passage 5, such nozzle being adapted to automatically admit air to the pump for the proper supply of the suction and discharge air chambers at all times except during the priming operation, as hereinattcr explained. The end of the passage 5 is conveniently closed by a screw" plug 7, and is also provided with an emergency cock 8. The snifting nozzle 6 is preferably formed of bronze and, as it is im practicable to drill a. hole sufliciently small therein for the present purpose, such nozzle is preferably provided with a tip formed of aluminum or some other non-corrosive metal, indicated at 9, which is set into the nozzle 6 in any suitable manner. The nozzle tip 9 is conveniently formed by first drilling small hole, one-sixteenth of an incn in diameter, therethrough and then closing the end in over a piece of steel wire of the proper diameter, the latter being subsequently withdrawn. A. very small hole of the proper size can thus be properly and rapidly formed. and is particularly well adapted for the present use, in that the nozzle tip or openingbeing at the extreme end, there is little chance for paint or grease to pack around the'opening, as would be the case it such opening were in a recess. This feature r nders the nozzle tip practically seltcleaning.

The operation otth primingmeans above described is as "follows: Plug 3 in priming basin 1 having been removed and the cock 8 being closed, priming liquid is supplied to such basin until the pulsation chamber Fis filled andthe liquid in the basin covers the nozzle tip 9, thus preventing access of air to the suction. air chamber through nozzle 6 v and passage 5. The plug 3 is then replaced the suction air chamber and the pump then take up automatically its air charging function,'until stopped and priming is again necessary, when the operation above described will be repeated;

"tions and also in other relations with equal advantage. 7

hat is claimed is:

1. Priming means for pumps and the like, comprising a liquid receiving receptacle having an opening for admitting liquid. to the pump cylinder, means for closing said open mg, and an air supplying connection with said receptacle adapted to be sealed by the liquid therein during the priming operation.

, 2. Priming means for pumps and the like, comprising a liquid receiving receptacle having an opening for admitting liquid to the .pump' cylinder, means for closing said openv ing, and a suction air chamber;connection with said receptacle adapted to be sealed by the liquid'therein duringth -priming opera tion.

3. Priming means for pumps and the like, comprising a liquid receiving receptacle having an opening for admitting liquid to the pump cylinder, means for closing said opening, a nd'an air supplying connection with said receptacle adapted to automatically admit air to the apparatus on completion of the priming operation.

4. Priming means for pumps and the like, comprising a liquid receiving receptacle hav- ,ing an opening for admitting liquid to the pumpcylinder, means for closing said open-- ng, and an air shifting nozzle connected 1withsaid receptacle and ,adapted to automatically admit air to the apparatus when the liquidflevel in said receptacle exposes the-nozzle orifice to the atmosphere.

5. Priming means for pumps and the like, comprising a liquid receiving receptacle having an opening for admitting liquid to the 7 my hand.

pump cylinder, means for closing said'opeir ing, and an air sni'tting nozzle connected with said receptacle and adapted to automatically admit air to the suction air chamber of the pump when the liquid level in said receptacle exposes the nozzle orifice to the atmosphere. 7

6. Priming means for pumps and the like, comprising a priming basin communicating with the pump cylinder, means for closing communication between said basin and cylinder, and an air snitting nozzle connected with said basin and adapted to admit, air to the suction air chamber during normal operation and to automaticallyshut off said air supply during priming. a

7. Priming means for pumps and the like, comprising a priming basin having an open ing for admitting liquid to the pump cylinder, a removable plug for closing said opening, and an air shifting nozzle connected. with said basin, said .snifting nozzle be ing adapted to prevent'entrance of air to the suction air chamber of the purnp'during priming but toautomatically admit air thereto when suflicient liquid in said basin has been withdrawn through said nozzle to expose the orifice thereof to the atmosphere.

8. Priming means for pumps and the like, comprising priming basin 1 communicating with the pump cylinder, and nozzle 6 for supplying air to-suction air chamber H. the

air inlet of nozzle 6 being within and above the bottom of the basin. 7

9. A priming means for pumps and the like, comprising priming basin 1 communieating with pulsation chamber'F, plug 3, and snifting nozzle 6 having tip 9" for conveying air to suction airchamber H after the priming operation, the air inlet of noz zle 6 being within and above the bottom of the basin. l

10. The combination with priming means for pumps and the like, of air'snifting nozale 6 having removable tip 9, the orifice in said tip being closed in' at the end of the tip to reduce the'diameter of the tip bore. In testimony whereof, I have hereunto set WILLS M. FLEMING.-

Images