US2795194A - Reversible pump - Google Patents

Description

June 11, 1957 Filed March 18, 1953 FIG. 1.

E. 'r. NEUBAUER ETAL REVERSIBLE PUMP 2 Sheets-Sheet l IN V EN TORS. EM/L 7. NEUBAUER ALBERT W. SCH/2005B REUBEN J. HACKBART MEW ATTORNEYS.

June 11, 1957 E. T. NEUBAUER ETAL- ,1

' REVERSIBLE PUMP Filed March 18, 1955 2 Sheets-SheefZ INVENTORS. EM/L T. NEUBAUER 'ALBERT M4 SCHRODER 4 By REUBEN -J. HACKBART wram ATTORNEYS.

United States PatentO "i i REVERSIBLE PUMP Application March 18, 1953, Serial No. 343,064

2 Claims. 01. 103-101 This invention relates to pumps and particularly to pumps which will operate regardless of the direction of rotation.

It is an object of this invention to provide a pump which has a pick up member which is automatically indexable' to receive fluid during rotation of the pump in either direction.

It is another object of the invention to provide a pump which is quiet and efficient in operation and which does not agitate the fluid pumped.

It is still a further object of the invention to provide a new and improved pump which may be simply and inexpensively manufactured and assembled and which is dependable in operation.

" Other objects and advantages will appear as the specification proceeds to describe the preferred embodiments of the invention with reference to the accompanying drawing; in which Fig. 1 is a cross sectional view of the pump installed iin the base of a machine such as a compressor.

Fig. 2 is a sectional view taken on line 2--2 of Fig. l :ShOWing the position of the parts during one direction of ;rotation.

Fig. 3 is a sectional view taken on line 2-2 of Fig. 1 :showing the position of the parts during rotation in a direction opposite to that of Fig. 2.

Fig. 4 is a sectional view taken on line 4-4 of Fig. 1.

Fig. 5 is a view in elevation of the stationary shaft which supports the pick-up member.

Referring now to the drawings, numeral designates the pump body or machine frame in which the pump is assembled, and numeral 12 designates a driven shaft which drives the pump. A cover 14 is attached to the frame 10 by screws 16 and serves as a reservoir or sump for the fluid to be pumped. A screw 18 is in threaded engagement with the shaft 12 at the axis of rotation of the shaft 12. Screw 18 secures hub 20 to the shaft 12 and a pin 22 is in engagement with shaft 12 and hub 20 to prevent relative rotation between shaft 12 and hub 20. A spinner tube 24 is attached in any suitable manner as by brazing to the hub 20. Spinner tube 24 extends below the surface of liquid in the reservoir of cover 14. A spinner 26 in the form of a cup is attached to the hub 20 and the spinner tube 24 in any suitable manner as by brazing. The bottom of the cup 26 has a raised central portion 27 to form a dam and to prevent all the liquid from draining from the cup 26 when rotation stops. When rotation is resumed liquid already in cup 26 rapidly establishes flow as will more clearly appear in the light of the following description. A cylindrical screen 28 is fastened to the cover 14 by screws 30 and prevents dirt from entering the spinner tube 24 from the reservoir of liquid in cover 14. A drain plug 32 is in threaded engagement with the cover 14.

A fixed shaft 34 extends through a hole in an ear 36 which extends inwardly from the wall of the frame 10. A nut 38 holds the shaft 34 in place on the car 36 and Patented June l, 1957.

a pin 40 is'sup'ported in a hole in car 36 and extends downwardly therefrom to engage in key slot 42 in shaft 34 to insure that shaft 34 is held in correct rotative-position.

'A fluid pick-up member 44 is rotatively supported on shaft 34. Pick-up member 44 has at its upper'enda cut away portion 46 subtending an angle of about and terminating in abutments 48 and 50. Pick-up member- 44 changes its position according to the direction of rotation of the spinner 26. The frictional force of the rotating liquid upon the pick-up member 44 causes abutment 50 to contact pin 40 during clockwise rotation as shown in Figure 2 and causes abutment 48 to contact pin 40 during counterclockwise rotation as shown in Fig. 3. In order to increase the frictional force of the fluid on the pick-up member, a groove 52 and protuberances 54 are provided in the surface. Pick-up member 44 has a passageway 56 and a passageway 58. As shown in Fig. 2 passageway 56 is in communication with holes 60 and 62 for the flow of fluid therethrough. As shown in Fig. 3 passageway 58 is in communication with holes 60 and 62 for the flow of fluid therethrough. From holes 60 and 62 the fluid flows upwardly through hole 64 in shaft 34 and into discharge tube 66 which is secured to shaft 34 by nut 68. A ring 70 is secured as by brazing to the lower end of spinner tube 24. Ring 70 provides a small opening at the bottom end of spinner tube 24 to permit the hydraulic head produced by the rotation of said spinner tube to lift the fluid up into the spinner tube proper.

During operation of the pump, fluid spills from the top of spinner tube 24 into the spinner 26 and builds up at the rim. The fluid then flows through passageway 56 or 58, holes 60 and 62, hole 64 and finally into discharge line 66. Fluid from line 66 may be used to lubricate bearings, operate fluid cylinders or for other well known uses. The liquid returning from such devices will flow by gravity between the spinner 26 and the frame 10 and descend into the reservoir of cover 14.

Although I have described in detail the preferred embodiments of my invention, I contemplate that many changes may be made without departing from the scope and spirit of my invention, and I desire to be limited only by the claims.

I claim:

1. A reversible pump comprising a cup supported for rotation about its center, means for rotatably driving said cup, a tube extending downwardly from the bottom of said cup and being open to the interior of said cup to conduct liquid to said cup, said tube being adapted to extend downwardly into a reservoir of liquid to be pumped, a discharge conduit extending upwardly out of said cup, said discharge conduit having an opening, a pick up mem ber pivotally mounted on said discharge conduit, said pick up member having two impact passageways angularly spaced about its pivotal axis and extending outwardly from said discharge conduit, and stop means on said pick up member and arranged to limit pivotal movement of said pick up member between a point at which one of the impact passageways is in communication with the opening in said discharge conduit and a point at which the other of the impact passageways is in communication with the opening in said discharge conduit.

2. A reversible pump comprising a cup supported for rotation about its center, means for rotatably driving said cup, a tube extending downwardly from the bottom of said cup and being open to the interior of said cup to conduct liquid to said cup whereby a film of liquid is established on the interior side surface of said cup, said tube being adapted to extend downwardly into a reservoir of liquid to be pumped, a discharge conduit extend- 3 ing upwardly out of said cup, said discharge conduit having an opening, a pick up member pivotally mounted on said discharge conduit, saidpick up member having impact passageways spaced angularly about its pivotal axis and extending outwarly from said discharge conduit, said pick up member being arranged to extend into the film of liquid on the interior side surface of said cup and stop means on said pick up member and arranged to limit pivotal movement of the pick up member in one direction to a position in which one of said impact pas: sageways extends from the film of liquid to the opening of said discharge conduitand in the other direction to a positionlin which the other of said impact passageways extends from the film of liquid to the opening of said discharge conduit.

References Cited in the file of this patent UNITED STATES PATENTS

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