US1823098A

US1823098A - Gear pump

Info

Publication number: US1823098A
Application number: US284736A
Authority: US
Inventors: George R Hargis
Original assignee: Frederick Iron & Steel Co
Current assignee: Frederick Iron & Steel Co
Priority date: 1928-06-12
Filing date: 1928-06-12
Publication date: 1931-09-15
Anticipated expiration: 1948-09-15

Description

"se t.15,1'931. RHA GIS v 1,823,098

GEAR PUMP Filei June 12, 1928 s Sheets-Sheet 1,

IN V EN TOR. 2 4

Sept. 15, 1931. G. R. HARGIS GEAR PUMP Filed June 12, 1928 .3 Sheets-Sheet 3 INVENTORQ Geozye ZR $2 419,

ATTORNEY it pumped from 1 pump of my construction,

Patented Sept. 15, 1931 UNITED STATES.

PATENT OFFICE GEORGE HA lS or FREDERICK,

MARYLAND; essreiqoa 1 THE FREDERICK mom a S Q MPANY, E ER K M LAND; A CORP I N E MARY A G AR PUMP.

Application filed; June 12, 1928. Serial No. 284,736,

My invention relates broadly to pumps and more particularly to a compact construction. of gear pump for composite mixtures of air and: water.

@ne of the objects. of my invention is to provide a. construction of gear pump which may be manufactured from a minimum number of parts for pumping composite mixtures of'air and water where the pump is proacross. both chambers for permitting quick access to parts of the pump for repair and simplifying the mechanical assembly of the 1;. pump.

Another object of my invention is to provide a compact construction of gear pump having integrally cast suction and discharge chambers with a portion of the chambers cut away to receive a pair of aligned gears journaled one above the other centrally of the casting for producing suction in one chamber and discharging into an adjacent chamber a compact mixture of air and water the suction chamber.

Still another object of my invention is to provide a simplified construction of gear pump having integrally cast suction anddischarge chambers in which there is housed a pair of drive gears in which the suction and discharge chambers terminate with means connecting opposite sides of the casting for journaling the gears in a central position within the casting.

ther and further objects of my invention reside in the, construction of the gear pump described in the following specification and set forth in the accompanying drawings in which:

Figure 1 is a front view of a gear pump constructed in accordance with my invent-ion; Fig. 2 is a lateral cross-sectional view taken through the gear pump on line 2-2 of Fig. 3; and Fig. 8 is a longitudinal crosssectional view through the gear pump on line 3-3 of Fig. 1..

Referring to the drawings in detail, reference character 1 designates the base of the casting which forms the housing for the discharge chambers,

- one side of the pump the base being mounted upon any suitable foundation represented at 2, and secured thereon by suitable means such asbolts, nuts or lag screws indicated at 3. The casting has its body portion 4 extending vertically into cast side portions 5 connected by intermediate web portions which terminate in an enlarged cast portion 7 in the interior of the casing. The suction chamber is indicated at 45 and the discharge chamber at 46. The casting is provided with centrally extending

bores

8 and 9 adjacent its lower extremity. The borev 8 passes par-v tially through the cast portion 7, while the bore, 9 extends partially through the cast portion t. The suction port. 10 enters the left hand side of

bores

8 and 9, while the discharge port 11 extends from the opposite side of the

bores

8 and 9. v The casting 7 is. rounded on oppositesides of the center thereof to provide relatively narrow passageways to and from the

bores

8 and 9. I provide gears, and 21 carried by shafts18 ajncl'19 which are journaled in bearings at opposite ends thereof. 1 have shown one journalat formed by a support 22 which carries ball races. 23 and: 24: which journal the ends of shafts '18 and 1 9. A cover 27 is provided on the end ofthe bearing to which a lubricating cup 29: communi-. cates formaintaining the bearings in proper condition at all times. The cover 27 is. se-. cured in position by suitable screw members 41. The opposite ends of the shafts 18 and 19. are journaled in the ball races. 25. and 26. carrying bracket member 42. The end of shaft 18 is connected through the couplings 31 32 and 3 3 with a driven shaft to which is secured the flange me her 32 by which the pump may be driven from a suitable prime mover. The bearings and 26 are housed within the casing 28 to which lubricant is supplied through cup 30. The shafts 18 and 19 pass through stuifing boxes 17 formed in flange 34 and to 35 bolted in place by attachment members 36. The top plate 35 abuts at 43 with the upper extremity 44 of partition member 6, thus providing a complete suction chamber 45 and discharge chamber 46. The plate 35 is provided with a central screw threaded

aperture

38 and 37 located substantially along the center line of each chamber. Pipe line 39 connects to screw threaded portion 38 providing a suction inlet to the pump. Pipe line 40 connects through the plate at 37 providing a discharge outlet from the pump. It will be understood that when the rotation as shown by the arrows in Fig. 2 is reversed that the suction and discharge connections are also reversed.

"In order to make necessary repairs on the pump the top plate 35 may be removed to secure immediate access to the interior of the suction and discharge chambers. The pump gears are readily removable by with drawing plates 12 and removing the several bearings.

I have found the pump construction of my invention extremely practical and particularly adapted for the removal of the air core in the center of a cake of ice when the ice is being frozen. The pump will operate upon a composite mixture of air and water. The positioning of the vertical chamber immediately above the pump gears and integral with the pump case obviates the necessity of priming except on the initial start. The elimination of joints and fittings serves to decrease leakage and increase the efficiency of the pump. The necessity of the self-priming feature of the pump becomes apparent when it is considered how the pump is normally used in practice. In the manufacture of ice where there are a numrun. The

her of independent cans of water being frozen a hose is immersed in the can and the air which is pocketed in the composite mixture of ice and water is pumped out leaving an ice cake which can be frozensolid.

When the operator moves from one can tothe next the end of the hose may be thrown upon the floor while the pump continues to pump will stop discharging a composite mixture of water and air, but due to the fact that a certain amount of water is retained in the priming or suction cham ber 45 when the suction hose is immersed in the adjacent can of water the pump, after a short period, will exhaust the air from the ice core in the same manner as in the previous operation without repriming.

While I have described my invention in a preferred embodiment, I desire that it be understood that modifications may be made and that no limitations upon my invention are intended other than are imposed by the scope of the appended claim.

l/Vhat I claim as new and desire to secure said bowl end of said wall above the bowl shaped bottom portion of said casting and projecting on opposite sides thereof and curved according to the contour of the bowl shaped bottom of said casting for establishing a substantially uniform passage extending from and leading to said suction and discharge chambers, said enlarged central portion and shaped portion having bores extending therethrough, and cooperating gear devices rotatably mounted in said bores and disposed centrally with respect to said chambers and adapted to perform a pumping operation between said suction and discharge chambers.

In testimony whereof I aflix my signature.

GEORGE R. HARGIS.

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