US2789511A - Flexible vane pump impeller - Google Patents

Flexible vane pump impeller Download PDF

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Publication number
US2789511A
US2789511A US356968A US35696853A US2789511A US 2789511 A US2789511 A US 2789511A US 356968 A US356968 A US 356968A US 35696853 A US35696853 A US 35696853A US 2789511 A US2789511 A US 2789511A
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impeller
vanes
chamber
hub
outer ends
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Expired - Lifetime
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US356968A
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Doble Warren
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JABSCO PUMP CO
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JABSCO PUMP CO
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C5/00Rotary-piston machines or pumps with the working-chamber walls at least partly resiliently deformable

Description

April 23, 1957 w. DOBLE FLEXIBLE VANE PUMP IMPELLER Filed May 25, 195s INVENTOR.

. WARREN DOBLE BY H/s ATTORNEY@ HARR/s, K/ecH, Fos Tena; Hake/5 2,789,511r FLEXIBLE VABIE PUMP IMPELLER Warren Doble, North Hollywood,l Calif., assigner, by

mesne assignments, to Jabsco Pump Company, Burbank, Calif., a corporation of California Application May 25, 1953, Serial No. 356,968

The present invention relates to a pump having an impeller of the flexible vane type, such as that disclosed and claimed in United States Patent Number 2,189,356,

`granted February 6, 1940, to Arthur M. Briggs, im-

pellers of this type ordinarily being formed in whole or in part of rubber, or similar elastomeric materials.

An impeller of the foregoing general character may be provided with exible vanes the outer ends of which are bulbous as viewed in a plane normal to the axis of rotation of the impeller, and a primary object of the invention in this conection is to offset the bulbous outer ends of the vanes in a direction opposite to the direction of rotation of the impeller. This construction has the effect of reducing the flexure of the vanes for a given thickness of the cam employed to flex the vanes, this reduction in vane llexure resulting in a material increase in the service life of the impeller, which is an important feature of the invention.

Another important object is to provide an impeller of the foregoing character having ilexible vanes provided with feathered edges engageable with the end walls of the impeller chamber of the pump, the feathered edges of the vanes lying on the neutral axes thereof, With conventional flexible vanes having unfeathered edges, flexure of the vanes by the cam produces what might be termed knuckles where the vane edges engage the end walls of the impeller chamber, such knuckles resulting from the fact that the fibers of rubber on the outer sides of the curves in the vanes are in tension while the bers on the inner sides of the curves in the vanes are in compression, which has the eifect of causing the rubber to expand axially with a resultant increase in friction between these knuckles and the end walls of the impeller chamber. Such knuckles have been found to be a source of internal leakage in pumps of this type. By feathering the vane edges, the present invention eliminates such knuckles since the neutral axes of the vanes are neither in tension nor compression when the vanes are flexed by the cam, the feathered edges, as hereinbefore indicated, lying on the neutral axes of the vanes. Such elimination of internal leakage by feathering the vane edges constitutes an important feature of the present invention.

Another important object of the invention is to provide the end faces of the hub of the impeller with a plurality of axially projecting ribs, each end face of the hub preferably having a plurality of annular and radial ribs forming a pattern somewhat similar in appearance to that of an ordinary wallie iron. This Waie iron configuration on each end of the impeller hub provides bafes to prevent internal leakage past the hub and also materially reduces friction between the end faces of the hub and the end walls of the impeller chamber, which are important features.

United States Patent "ice drawing and which is described in detail hereinafter. Referring to the drawing:

Figure 1 is a cross-sectional View of a pump incorporating the impeller of the present invention;

Figure 2 is a fragmentary sectional view taken along the arrowed line 2 2 of Figure l; and

Figure 3 is an enlarged, fragmentary sectional view taken along the arrowed line 3-3 of Figure 2.

In the drawing, the numeral 10 designates a pump housing which is provided with an impeller chamber 11v and which is provided with inlet and outlet ports 12 and 13 communicating with the impeller chamber, a cam 14 being provided between the inlet and outlet ports, as is conventional. Concentrically mounted in the impeller chamber 11 on a shaft 15 is an impeller 16 of the invention which is rotatable in the direction of the arrow 17, the impeller preferably being formed in whole or part of rubber, or a similar material, and including a central hub 18 having exible vanes 19 radiating therefrom. These vanes are flexed by the cam 14 as the impeller 16 rotates so as to pump iiuid from the inlet port 12 to the outlet port 13, as is well known in the art.

Considering the impeller 16 of the invention in more detail, the vanes 19 are provided with outer ends 23 which are bulbous, as viewed in a plane normal to the axis of rotation of the impeller, the bulbous outer ends, or bulbs, being offset laterally relative to the vanes 19 in a direction opposite to the direction of rotation 17 of the impeller, i. e., the centers of the bulbs being offset laterally relative to the radial center lines or Vneutral axes of the vanes in a direction opposite to the direction of impeller rotation. With bulbs 23 offset in this direction, the sides of the bulbs which engage the cam 14 do not project beyond, or project only very slightly beyond, the forward faces of the vanes 19. The effect of this construction is to materially reduce the amount of exure of the vanes, as compared to vanes having centered bulbs at their outer ends, as taught by the aforementioned Briggs patent, for example. In other words, it will be apparent that the iiexure of the vanes is reduced by an amount equal to the reduction in the amount which the bulbous outer ends project forwardly of the forward faces of the vanes 19. This reduction in vane flexure is quite important since, as hereinbefore pointed out, it adds materially to the service life of the impeller.

As best shown in Figure 3 of the drawing, the edges 24 of the vanes 19, which are engageable with the end walls of the impeller chamber 11, are feathered, or substantially feathered, the thickness of the edges 24 being very small as compared to the vane thickness. As hereinbefore discussed in detail, this has the effect of reducing friction and of eliminating or minimizing internal leakage between the edges of the vanes and the end walls of the impeller chamber, which are important features.

As best shown in Figure l of the drawing, each end of the hub 18 of the impeller 1611s provided with a plurality of ribs 2S and 26 which project axially of the impeller and which are engageable with the adjacent end wall of the impeller chamber 11, the ribs 25 being annular and the ribs 26 being radial in the particular construction illustrated. Also in the particular construction illustrated, the radial ribs 26 are shown as being, in effect, extensions of the feathered edges 24 of the vanes 19. The pattern of ribs 25 and 26 provides each end face of the hub 1S with a configuration similar to that of a waffle iron in the particular construction shown. However, different patterns of axially projecting ribs on the end faces of the impeller hub 18 might be employed, such as rib patterns resulting from dimples in the end faces similar to the `dimples in the surface of a conventional golf ball. In either event, the axially projecting ribs on the end faces of the impeller hub 18 act as baflies to preaffamati vent internal leakage past the hub and also reduce friction between the hub ends and the end walls of the impeller chamber, which are important features.

Although I have disclosed an exemplary embodimentl of my invention herein for purposes of illustration, it Will be understood that various changes, modifications and substitutions may be incorporated in such embodiment without necessarily departing from the spirit of the invention as delined by the claims appended hereto.

I claim as my invention:

1. A pump impeller having flexible elastomeric vanes which have neutral axes and the outer ends of which are bulbous when Viewed in a plane normal to the axis of rotation of said impeller, the centers of said bulbous outer ends being otset relative to the neutral axes of said vanes in a direction opposite to the direction of rotation of said impeller both when said vanes are flexed and when they are unexed.

2. In a pump, the combination of: a housing providing an impcller chamber and providing inlet and outlet ports which communicate with said chamber; a cam in said chamber between said ports; and an impeller concentrically located in said chamber and rotatable in a predetermined direction therein, said impeller having flexible elastomeric vanes which have neutral axes and the outer ends of which are engageable with the peripheral Wall of said impeller chamber and with said cam and are bulbous when viewed in a plane normal to. theI axis of rotation of said impeller, said vanes being flexed at least when said bulbous outer ends are in engagement with said cam, the centers of said bulbous outer ends being oset relative to the neutral axes of said vanes in a direction opposite to said direction of rotation of said impeller both when said vanes are lexed and when they are unliexed.

References Cited in the le of this patent UNITED STATES PATENTS 2,189,356 Briggs Feb. 6, 1940 2,258,371 Wernert Oct. 7, 194i 2,455,194 Rumsey Nov. 30, 1948 2,460,952 Simer et al. Feb. 8, 1949 2,466,440 Kiekhaefer Apr. 5, 1949 2,492,935 McCulloch et al. Dec. 27, 1949 2,499,163 Rand Feb. 28, 1950 2,542,268 Weyer Feb. 20, 1951 2,599,600 Arnold June l0, 1952 2,644,402 Lehman July 7, 1953 2,648,287 Thoren et al. Aug. 11, 1953 2,663,263 Mayus et al. Dec. 22, 1953 2,664,050 Abresch Dec. 29, 1953 FOREIGN PATENTS 244,826 Italy Feb. 27, 1926

US356968A 1953-05-25 1953-05-25 Flexible vane pump impeller Expired - Lifetime US2789511A (en)

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Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2855853A (en) * 1956-03-14 1958-10-14 Jabsco Pump Co Pump with slotted cam
US2858769A (en) * 1955-08-22 1958-11-04 Jabsco Pump Co Pump with sealed impeller hub
US2911920A (en) * 1956-08-20 1959-11-10 Samuel P Thompson Pump with flexible impeller
US2933046A (en) * 1956-12-26 1960-04-19 Jabsco Pump Co Pump with flexible impeller and flexible annular cam
US2974767A (en) * 1958-05-26 1961-03-14 Bertram A Fulton Combined pump and torque transmitting coupling
US3053190A (en) * 1961-04-10 1962-09-11 Minnesota Rubber Co Rotary vane type positive displacement pump
US3054355A (en) * 1961-04-25 1962-09-18 Lord Mfg Co Pump
US3169485A (en) * 1963-11-01 1965-02-16 Hypro Engineering Inc Pump construction
US3183842A (en) * 1963-11-01 1965-05-18 Hypro Engineering Inc Pump construction
US4411593A (en) * 1979-07-30 1983-10-25 Yamaha Hatsudoki Kabushiki Kaisha Rotary type pump resistant to muddy water
US4940402A (en) * 1988-11-08 1990-07-10 Brunswick Corporation High pressure and high lift pump impeller
EP1789314A2 (en) * 2004-09-17 2007-05-30 The Penn State Research Foundation Expandable impeller pump
US20070231135A1 (en) * 2006-03-31 2007-10-04 Orqis Medical Corporation Rotary Blood Pump
US20080089797A1 (en) * 2003-09-18 2008-04-17 Wampler Richard K Rotary Blood Pump
US20080114339A1 (en) * 2006-03-23 2008-05-15 The Penn State Research Foundation Heart assist device with expandable impeller pump
US20100016960A1 (en) * 1997-10-09 2010-01-21 Bolling Steven F Implantable Heart Assist System And Method Of Applying Same
US20110004046A1 (en) * 2009-07-01 2011-01-06 The Penn State Research Foundation Blood pump with expandable cannula
US8485961B2 (en) 2011-01-05 2013-07-16 Thoratec Corporation Impeller housing for percutaneous heart pump
US8591393B2 (en) 2011-01-06 2013-11-26 Thoratec Corporation Catheter pump
US8597170B2 (en) 2011-01-05 2013-12-03 Thoratec Corporation Catheter pump
US8721517B2 (en) 2012-05-14 2014-05-13 Thoratec Corporation Impeller for catheter pump
US9138518B2 (en) 2011-01-06 2015-09-22 Thoratec Corporation Percutaneous heart pump
US9308302B2 (en) 2013-03-15 2016-04-12 Thoratec Corporation Catheter pump assembly including a stator
US9327067B2 (en) 2012-05-14 2016-05-03 Thoratec Corporation Impeller for catheter pump
US9358329B2 (en) 2012-07-03 2016-06-07 Thoratec Corporation Catheter pump
US9381288B2 (en) 2013-03-13 2016-07-05 Thoratec Corporation Fluid handling system
US9421311B2 (en) 2012-07-03 2016-08-23 Thoratec Corporation Motor assembly for catheter pump
US9446179B2 (en) 2012-05-14 2016-09-20 Thoratec Corporation Distal bearing support
US9675738B2 (en) 2015-01-22 2017-06-13 Tc1 Llc Attachment mechanisms for motor of catheter pump
US9675739B2 (en) 2015-01-22 2017-06-13 Tc1 Llc Motor assembly with heat exchanger for catheter pump
US9770543B2 (en) 2015-01-22 2017-09-26 Tc1 Llc Reduced rotational mass motor assembly for catheter pump
US9827356B2 (en) 2014-04-15 2017-11-28 Tc1 Llc Catheter pump with access ports
US9872947B2 (en) 2012-05-14 2018-01-23 Tc1 Llc Sheath system for catheter pump
WO2018032038A1 (en) * 2016-08-15 2018-02-22 Coventry Group Limited Lubrication pump
US9907890B2 (en) 2015-04-16 2018-03-06 Tc1 Llc Catheter pump with positioning brace
US10029037B2 (en) 2014-04-15 2018-07-24 Tc1 Llc Sensors for catheter pumps
US10105475B2 (en) 2014-04-15 2018-10-23 Tc1 Llc Catheter pump introducer systems and methods

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2189356A (en) * 1938-08-02 1940-02-06 Arthur M Briggs Rotary pump
US2258371A (en) * 1938-05-30 1941-10-07 Wernert Karl Rotary piston machine with rotor of yieldable material
US2455194A (en) * 1943-11-10 1948-11-30 Rumsey Lillian Gray Rotary flexible vane pump
US2460952A (en) * 1945-07-28 1949-02-08 Paddle Pumps Inc Rotary pump with elastic rotor sealing rib
US2466440A (en) * 1948-07-29 1949-04-05 Kiekhaefer Elmer Carl Impeller for rotary pumps
US2492935A (en) * 1943-11-22 1949-12-27 Borg Warner Rotary blower with abrading rotor ends and abradable casing sealing ridges
US2499163A (en) * 1948-01-31 1950-02-28 H J Rand Washing Machine Corp Rotary pump
US2542268A (en) * 1946-11-22 1951-02-20 Marine Products Company Rotary pump or motor
US2599600A (en) * 1946-11-15 1952-06-10 Cascade Pump Company Pump
US2644402A (en) * 1949-10-06 1953-07-07 Irvin H Lehman Self-sealing rotor for fluid transferring devices
US2648287A (en) * 1949-06-15 1953-08-11 Thompson Prod Inc Pump
US2663263A (en) * 1949-08-19 1953-12-22 Submerged Comb Company Of Amer Rotary pump
US2664050A (en) * 1949-03-02 1953-12-29 Gen Motors Corp Domestic appliance

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2258371A (en) * 1938-05-30 1941-10-07 Wernert Karl Rotary piston machine with rotor of yieldable material
US2189356A (en) * 1938-08-02 1940-02-06 Arthur M Briggs Rotary pump
US2455194A (en) * 1943-11-10 1948-11-30 Rumsey Lillian Gray Rotary flexible vane pump
US2492935A (en) * 1943-11-22 1949-12-27 Borg Warner Rotary blower with abrading rotor ends and abradable casing sealing ridges
US2460952A (en) * 1945-07-28 1949-02-08 Paddle Pumps Inc Rotary pump with elastic rotor sealing rib
US2599600A (en) * 1946-11-15 1952-06-10 Cascade Pump Company Pump
US2542268A (en) * 1946-11-22 1951-02-20 Marine Products Company Rotary pump or motor
US2499163A (en) * 1948-01-31 1950-02-28 H J Rand Washing Machine Corp Rotary pump
US2466440A (en) * 1948-07-29 1949-04-05 Kiekhaefer Elmer Carl Impeller for rotary pumps
US2664050A (en) * 1949-03-02 1953-12-29 Gen Motors Corp Domestic appliance
US2648287A (en) * 1949-06-15 1953-08-11 Thompson Prod Inc Pump
US2663263A (en) * 1949-08-19 1953-12-22 Submerged Comb Company Of Amer Rotary pump
US2644402A (en) * 1949-10-06 1953-07-07 Irvin H Lehman Self-sealing rotor for fluid transferring devices

Cited By (64)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2858769A (en) * 1955-08-22 1958-11-04 Jabsco Pump Co Pump with sealed impeller hub
US2855853A (en) * 1956-03-14 1958-10-14 Jabsco Pump Co Pump with slotted cam
US2911920A (en) * 1956-08-20 1959-11-10 Samuel P Thompson Pump with flexible impeller
US2933046A (en) * 1956-12-26 1960-04-19 Jabsco Pump Co Pump with flexible impeller and flexible annular cam
US2974767A (en) * 1958-05-26 1961-03-14 Bertram A Fulton Combined pump and torque transmitting coupling
US3053190A (en) * 1961-04-10 1962-09-11 Minnesota Rubber Co Rotary vane type positive displacement pump
US3054355A (en) * 1961-04-25 1962-09-18 Lord Mfg Co Pump
US3183842A (en) * 1963-11-01 1965-05-18 Hypro Engineering Inc Pump construction
US3169485A (en) * 1963-11-01 1965-02-16 Hypro Engineering Inc Pump construction
US4411593A (en) * 1979-07-30 1983-10-25 Yamaha Hatsudoki Kabushiki Kaisha Rotary type pump resistant to muddy water
US4940402A (en) * 1988-11-08 1990-07-10 Brunswick Corporation High pressure and high lift pump impeller
US20100016960A1 (en) * 1997-10-09 2010-01-21 Bolling Steven F Implantable Heart Assist System And Method Of Applying Same
US7998054B2 (en) 1997-10-09 2011-08-16 Thoratec Corporation Implantable heart assist system and method of applying same
US20080089797A1 (en) * 2003-09-18 2008-04-17 Wampler Richard K Rotary Blood Pump
US8118724B2 (en) 2003-09-18 2012-02-21 Thoratec Corporation Rotary blood pump
US20100135832A1 (en) * 2003-09-18 2010-06-03 Wampler Richard K Rotary Blood Pump
US20080095648A1 (en) * 2003-09-18 2008-04-24 Wampler Richard K Rotary Blood Pump
US8684902B2 (en) 2003-09-18 2014-04-01 Thoratec Corporation Rotary blood pump
US20090060743A1 (en) * 2004-09-17 2009-03-05 The Penn State Research Foundation Expandable impeller pump
EP1789314A4 (en) * 2004-09-17 2010-03-31 Penn State Res Found Expandable impeller pump
US9717833B2 (en) 2004-09-17 2017-08-01 The Penn State Research Foundation Heart assist device with expandable impeller pump
US9364593B2 (en) 2004-09-17 2016-06-14 The Penn State Research Foundation Heart assist device with expandable impeller pump
US7927068B2 (en) 2004-09-17 2011-04-19 Thoratec Corporation Expandable impeller pump
US10215187B2 (en) 2004-09-17 2019-02-26 Tc1 Llc Expandable impeller pump
US20110236210A1 (en) * 2004-09-17 2011-09-29 The Penn State Research Foundation Expandable impeller pump
EP1789314A2 (en) * 2004-09-17 2007-05-30 The Penn State Research Foundation Expandable impeller pump
US8376707B2 (en) 2004-09-17 2013-02-19 Thoratec Corporation Expandable impeller pump
US8992163B2 (en) 2004-09-17 2015-03-31 Thoratec Corporation Expandable impeller pump
US9364592B2 (en) 2004-09-17 2016-06-14 The Penn State Research Foundation Heart assist device with expandable impeller pump
US7841976B2 (en) 2006-03-23 2010-11-30 Thoratec Corporation Heart assist device with expandable impeller pump
US20080114339A1 (en) * 2006-03-23 2008-05-15 The Penn State Research Foundation Heart assist device with expandable impeller pump
US10149932B2 (en) 2006-03-23 2018-12-11 The Penn State Research Foundation Heart assist device with expandable impeller pump
US20070231135A1 (en) * 2006-03-31 2007-10-04 Orqis Medical Corporation Rotary Blood Pump
US9512852B2 (en) 2006-03-31 2016-12-06 Thoratec Corporation Rotary blood pump
US20110004046A1 (en) * 2009-07-01 2011-01-06 The Penn State Research Foundation Blood pump with expandable cannula
US8535211B2 (en) 2009-07-01 2013-09-17 Thoratec Corporation Blood pump with expandable cannula
US8684904B2 (en) 2009-07-01 2014-04-01 Thoratec Corporation Blood pump with expandable cannula
US8485961B2 (en) 2011-01-05 2013-07-16 Thoratec Corporation Impeller housing for percutaneous heart pump
US8597170B2 (en) 2011-01-05 2013-12-03 Thoratec Corporation Catheter pump
US8591393B2 (en) 2011-01-06 2013-11-26 Thoratec Corporation Catheter pump
US9962475B2 (en) 2011-01-06 2018-05-08 Tc1 Llc Percutaneous heart pump
US9138518B2 (en) 2011-01-06 2015-09-22 Thoratec Corporation Percutaneous heart pump
US10117980B2 (en) 2012-05-14 2018-11-06 Tc1 Llc Distal bearing support
US9446179B2 (en) 2012-05-14 2016-09-20 Thoratec Corporation Distal bearing support
US10039872B2 (en) 2012-05-14 2018-08-07 Tc1 Llc Impeller for catheter pump
US9327067B2 (en) 2012-05-14 2016-05-03 Thoratec Corporation Impeller for catheter pump
US8721517B2 (en) 2012-05-14 2014-05-13 Thoratec Corporation Impeller for catheter pump
US9872947B2 (en) 2012-05-14 2018-01-23 Tc1 Llc Sheath system for catheter pump
US9675740B2 (en) 2012-05-14 2017-06-13 Tc1 Llc Impeller for catheter pump
US9421311B2 (en) 2012-07-03 2016-08-23 Thoratec Corporation Motor assembly for catheter pump
US9358329B2 (en) 2012-07-03 2016-06-07 Thoratec Corporation Catheter pump
US10086121B2 (en) 2012-07-03 2018-10-02 Tc1 Llc Catheter pump
US9381288B2 (en) 2013-03-13 2016-07-05 Thoratec Corporation Fluid handling system
US9308302B2 (en) 2013-03-15 2016-04-12 Thoratec Corporation Catheter pump assembly including a stator
US10071192B2 (en) 2013-03-15 2018-09-11 Tc1 Llp Catheter pump assembly including a stator
US9827356B2 (en) 2014-04-15 2017-11-28 Tc1 Llc Catheter pump with access ports
US10029037B2 (en) 2014-04-15 2018-07-24 Tc1 Llc Sensors for catheter pumps
US10105475B2 (en) 2014-04-15 2018-10-23 Tc1 Llc Catheter pump introducer systems and methods
US9770543B2 (en) 2015-01-22 2017-09-26 Tc1 Llc Reduced rotational mass motor assembly for catheter pump
US9675738B2 (en) 2015-01-22 2017-06-13 Tc1 Llc Attachment mechanisms for motor of catheter pump
US9675739B2 (en) 2015-01-22 2017-06-13 Tc1 Llc Motor assembly with heat exchanger for catheter pump
US9987404B2 (en) 2015-01-22 2018-06-05 Tc1 Llc Motor assembly with heat exchanger for catheter pump
US9907890B2 (en) 2015-04-16 2018-03-06 Tc1 Llc Catheter pump with positioning brace
WO2018032038A1 (en) * 2016-08-15 2018-02-22 Coventry Group Limited Lubrication pump

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