US1132263A - Rotary pump. - Google Patents

Description

J. O. HBINZE, JB.

ROTARY PUMP.

APPLICATION FILED JAN. I4, 1914.

1,132,263. Patented Mar.16,1915.

Waess es 'I [27 76W 77/ 'UNITED STATES PATENT onirica.

JOHN O. HEINZE, JR., OF DETROIT, MICHIGAN, ASSIGNOR TO GENERAL MOTORS COMPANY, OF DETROIT, MICHIGAN, A CORPORATION 0F NEW JERSEY.

ROTARY PUMP.

Specification of Letters Patent.

Patented'Mar. 16, 1915.

Application filed January 14, 1914. Serial No. 811,992.

To ali lw/zom it may," concern: Be it known that I, Jol-1N O. HEiNzn, Jr., a citizen of the United States of America, residing at Detroit, in the county of IVayne and State of Michigan, have invented certain new and useful Improvements in R0- tary Pumps, of which the following is a specification, reference being had therein lto the accompanying drawings.

The invention relates to rotary pumps of a type frequently used for propelling the water in the circulating system of an engine cooler and for similar purposes. In the present state of the art it is usual to `form the casings for such pumps of die castings. My improved construction is lighter and less expensive to manufacture, by being formed of sheet'metal stampings.

In the drawings: Figure 1 is an elevation of one of the half sections of the casing; Fig. Q is a cross section on line -w Fig. l; Fig. 3 is a section on line 'y-flh' and Fig. 4 is a perspective view of the guard plate for the inlet connection.

A is a sheet metal stamping formed with a circular chamber B for receiving the rotary impeller, and with a hub portion C projecting therefrom and returning at D to form a bearing for the impeller shaft, and the stamping is also provided with a tangential outlet passage E F, while a peripheral flange G serves for bolting or otherwise securing the section to a duplicate complementary part.

To produce an operative rotary pump, it is necessary to direct the inlet passage to the center of the impeller and to shield this passage from the centrifugal force of the'rotating water at the periphery. Such a construction cannot, however, be formed from a single stamping without great complexity in the forming dies. I have therefore devised a construction in which a shield or deflector formed of a separate stamping is attached to the main stamping and covers the inlet passage at the periphery. As specifically shown, H is a stamping which is of a cross section corresponding to that of the main stamping at the periphery of the central chamber B. This stamping II is placed in a recess formed in the main stamping, so as to centrally cover the inlet opening F .and to extend inward along the side. The

recess I in which the stamping H is placed and a radial inlet passage 'g inlet passage,

is of the proper depth so that the inner face of said stamping H is flush with the inner face of the portion of the main stamping forming the walls of the chamber B. rlhe inlet passage F is however suiiiciently em bossed to extend around the deflector, as indicated at F', and thus the water entering through the passage Fl will be directed'toward the center of the chamber/B before it comes in cont-.ict ,with the impeller'.r I preferably attach the stamping H to the main stamping by spot-welding.

With the construction as described the weight of the casing is reduced from that necessary with a die casting, and the cost of manufacture is also reduced.

What I claim as'my invention is,-

1. In a rotary pump, with a casing formed Iof a sheet metal stamping having impeller and inlet and outlet passages communicating with sa'id chamber, of a shield or deflector for completing the peripheral wall of said chamber opposite the inlet passage and deliecting the ingress to the center of said chamber.

the combination a chamber therein for the v 2. In a rotary pump, the combination with a casing formed of a sheet metal stamping having a circular embossed ortion forming a chamber for the rotary impeller, a tancntial outlet passage connecting with said chamber and a radial inlet passagemf a deflector for completing the peripheral wall of said chamber opposite said radial. inlet passage and deflecting the latter to the side thereof.

3. In a rotary pump, a casing formed of a sheet metal stamping having a circular embossed portion forming a chamber for the impeller, a tangential outlet passage communicating with said chamber and a radial and anauxiliary sheet metal stamping 'secured to the main stamping forming a continuation of thel peripheral wall of said central chamber opposite the radial inlet and deflecting the liquid passing through the latter to one side thereo v 4., In a rotary pump, a casingformed of a sheet metal stamping having a circular embossed portion forming a chamber forthe impeller and aradial inlet passage, and

an auxiliary stamping engaging a recess in said main stamping to form a continuation ofthe peripheral Wall of said chamber iiush with the inner face thereof and extending 6. In a rotary pump, a casing formed of up the side to'defiect4 the liquid in said inlet sheet metal stamping having a central chamtoWard the center of said chamber. ber and inlet and outlet passages connect- 5. In a rotary pump, a casing vformed of ing therewith, andan' insert in the Wall of 5 a sheet metal stampingv having a central Sald casingforming a-bridge across said in- 2 chamber, a tangential outlet and a' radial let passage for continuing the peripheral inlet, with a projecting marginal flange for wall of said chamber and deliectingthe liqconnection of `Said stamping with a com'p1e-. uid in said inlet toward the center of said mentary stamping, and anauxiliary stampchamber.-

10 ing fitting in a rec'ess in the Wall of said In'testimonywhereof I'aiix my signature 2 main stamping andV forming a ehield or dein presence of two Witnesses.

Hector, and continuing the peripheral Wall JOHN O.HEINZE, JR*l of said chamber across said inlet and direct 4Witnesses: n. v ing the liquid in the latter toward the center Y WM. J. BEL'KrLiP,y

` 15 o f said chamber.

y l Jamas P. BARRY.

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