US3257953A - Positive displacement piston pump - Google Patents

Positive displacement piston pump Download PDF

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Publication number
US3257953A
US3257953A US389702A US38970264A US3257953A US 3257953 A US3257953 A US 3257953A US 389702 A US389702 A US 389702A US 38970264 A US38970264 A US 38970264A US 3257953 A US3257953 A US 3257953A
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US
United States
Prior art keywords
piston
cylinder
pump
pin
port
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US389702A
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English (en)
Inventor
Harry E Pinkerton
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US389702A priority Critical patent/US3257953A/en
Priority to DE19651528509 priority patent/DE1528509A1/de
Priority to GB34881/65A priority patent/GB1109653A/en
Priority to ES0316507A priority patent/ES316507A1/es
Priority to NL6510705A priority patent/NL6510705A/xx
Application granted granted Critical
Publication of US3257953A publication Critical patent/US3257953A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F04B53/162—Adaptations of cylinders
    • F04B53/164—Stoffing boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F04B53/162—Adaptations of cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/04—Piston machines or pumps characterised by having positively-driven valving in which the valving is performed by pistons and cylinders coacting to open and close intake or outlet ports
    • F04B7/06—Piston machines or pumps characterised by having positively-driven valving in which the valving is performed by pistons and cylinders coacting to open and close intake or outlet ports the pistons and cylinders being relatively reciprocated and rotated

Definitions

  • the present invention has, for one of its principal ob ects, a positive displacement pump advantageously incorporatmg a piston adapted to both reciprocateand oscillate relative to the cylinder and, at the same time, a
  • a pump incorporating the teachings of the present invention employs a ducted piston which reciprocates and oscillates synchronously in a bi-ported cylinder.
  • the piston duct is so arranged as to connect the ports alternately with the pumping chamber. Under such circumstances, one port will communicate with the pumping chamber on the down stroke of the piston whereas the other port will be exposed to the chamber on the piston upstroke.
  • this invention contemplates at least three cylinder-piston arrangements for purposes of covering a majority of modern day fluid handling requirements. These arrangements are, respectively, termed monoplex, double monoplex and duplex. Each arrangement lends itself advantageously to a scavenger duct means whereby piston and gland bypass fluids can be returned at negative pressure to the suction side of the pump system.
  • a piston cylinder assembly is coupled with the output of a drive motor, with the axis of the motor output shaft being substantially normal to that of the piston and cylinder.
  • a variable speed motor can be employed.
  • the piston includes, at its outer end, a laterally projecting pin.
  • a crank is interposed between the pin and motor output shaft to turn the pin upon rotation of the shaft and thereby induce longitudinal reciprocation of the piston as well as rotational oscillation thereof relative to the cylinder.
  • the length of crank arm is adjustable for purposes of varying flow rates.
  • FIG. 3 is an enlarged fragmentary sectional view of the motor output shaft laterally extending piston pin with interposed crank for transferring rotational energy from the motor output shaft to the pin;
  • FIG. 4 is an enlarged cross sectional view taken along the-line 4-4'of FIG. 2;
  • FIG. 5 is an elevational view similar to FIG. 1 showing another embodiment of positive displacement piston pumping system wherein the crank is of fixed proportions thereby maintaining a constant flow rate;
  • FIG. 6 is a plan view thereof.
  • a positive displacement piston pump 30 is shown coupled with the output of a drive motor 32, both of which may be suitably mounted or suspended to suit the particular application.
  • the motor 32 may be secured by means of the anchoring bolts 34 and 36 suitably secured as by weld-ing to the motor housing.
  • the pump 30 is suitably suspended or otherwise mounted on the housing of the motor 32 by means of a bracket extension 38 formed as an integral part of the pump cylinder.
  • This bracket extension includes a transversely extending substantially flat plate 40 through which a suitable number of screws or threaded bolts 42 may extend to complete the coupling of the pump 30 to the motor 32.
  • a reduction gear train 44 which operates to reduce motor output to the selected value.
  • the pump cylinder 46 suitably accommodates the piston 48 adapted to be longitudinally reciprocal and rotatably oscillational relative thereto.
  • the ex terior end of the piston 48 is conveniently adapted to be coupled with the gear down rotational output of the motor 32 by means of the crank 50 in a manner to be described in detail shortly.
  • the inner end of the piston 48 is provided with a cutout or recessed portion 52 functioning as a duct which, together with the cylinder vided with ports 56 and 58 adapted to perform respectfully as inlet and outlet ports and communicate with the pump chamber 54.
  • Tubing may be suitably coupled with these ports as part of the circular system for fluid to be pumped.
  • the forinterior at the head of the piston cooperates in forming the cylinder pumpingchamber 54.
  • the cylinder is proward end of the piston 48 is adapted to close off or seal each port depending upon the extent of relative rotation of oscillation of the piston in the cylinder.
  • the outer end of the piston 48 has secured thereto a laterally projecting roll pin 57.
  • the free end of this pin cooperates with the crank 50 in transforming rotational movement to both reciprocal and oscillating movement of the piston 48.
  • the crank 50 cooperates to transform this energy and in doing so is adjustably mounted on the motor output shaft 55 for purposes of adjusting the effective crank arm length.
  • the crank 50 includes an eccentric drive 59 rotatably mounted on the output shaft 55 and adapted to be secured in place by means of the set screw 60.
  • the pin 57 bears against the eccentric drive 59. Therefore, rotation or turning of the drive 59 on the output shaft 55 will serve to increase or decrease the distance of the pin 57 to the axis of rotation of the shaft 55.
  • a retaining hook 61 is adapted to be associated with the pin.
  • This hook 61 is either adjustably mounted on a drive pin 62 in order to manually shift the hook into engagement with the pin 57 or, on the other hand, the drive pin 62 may be adjustable with respect to the drive shaft 55 in a radial direction and when the desired adjustment has been effected, it will be maintained in place by the suitably located screw.
  • the stages of turning of the pin 50 with the shaft 55 is shown in dotted lines in FIG. 3. This movement of the pin 57 will induce longitudinal reciprocation to the piston 48. At the same time, the piston 48 will oscillate or rock to thereby expose the duct 52 to one port of the cylinder 46 to another.
  • the pin disposed relative to the output shaft 55 as depicted by solid lines in FIG.
  • the piston 48 will be at the end of its retraction stroke with pump fluid present in the pumping chamber 54.
  • the pin 57 will also rotate counterclockwise to expose the duct 52 to the outlet port 58 to thereby pump fluid from the chamber 54 out through the duct 52 and port 58.
  • the pin 57 reaches the position illustrated by dotted lines in FIG. 3, the end of the pumping or forward stroke of the piston 48 has been reached and the retraction stroke commences.
  • the duct 52 With further rotation of the pin 57, the duct 52 will be in communication with the inlet port 56 to withdraw the liquid through the duct 52 into the pumping chamber 54. This cycle of operation is continued in fulfilling the desired performance of the pump of this invention (see numerals IIV of FIGS. 2 and 3).
  • a scavenger duct means which is generally designated by numeral 66.
  • a slot 68 is provided in the walls of the cylinder 4-6 at the suction side of the pump and connects the inlet port 56 with the rear terminal end of the cylinder defined by a counter bore 70.
  • a lip seal in the form of a relatively thin washer made of resilient material such as a filled Teflon is located at the rear end of the cylinder 46 and is provided with a central opening 74 which is smaller than the diameter of the piston such that u on thrusting the piston through the washer at assembly causes the hole to be enlarged through deformation in the direction of the counter bore.
  • a seal nut 76 not only serves to maintain the washer associated with the rear end of the cylinder but also restricts reversal of the deformation.
  • the sealing lip acts as a sequeegee to effectively wipe the piston dry on extraction from the cylinder when pasing through its retraction stroke.
  • any fluids which migrate during the pressure stroke towards the atmosphere in the pistoncylinder clearance gap, arrive at the counter bore. There they are wiped from the piston by the lip seal and are returned through the scavenger duct 68 to the suction side of the system.
  • a felt oiler 158 may be interposed between the ball 154 and inner surfaces of the crank 150.
  • a mere O-ring 66 may be interposed between the piston 48 and cylinder 46 and be suitably disposed in an accommodating recess in the latter.
  • the unit illustrated in FIGS. 5 and 6 is essentially the same as that of FIGS. 1 to 4. Accordingly, like parts will be similarly numbered with accompanying primes.
  • the component parts contributing to the pump units can be manufactured from metals, plastics or cermets as well as other materials. Basic simplicity of parts is also provided without limiting their versatility and application. These pumps can be employed for metering small or large flows in virtually any head to suction relationship. Without check valves danger of clog ing, cavitation and failure is avoided providing many years of troublefree service.
  • a pump comprising a cylinder having a cylinder wall defining an axial bore and piston movable therein, port means for introducing into and expelling a liquid from said pump and scavenging means incorporated in said pump for redirecting escaping liquid that escapes between the associated walls of the piston and cylinder, said scavenging means including a groove in said cylinder wall in fixed relationship to said port means and adapted to communicate with said port means during the movement of the piston and a squeegee means for wiping the piston of liquid in order that this liquid may be directed through the groove to the port means.
  • a pump comprising a cylinder having a cylinder wall defining an axial bore and piston movable therein, port means for introducing into and expelling a liquid from said pump, scavenging means incorporated in said pump for redirecting escaping liquid that escapes between the associated Walls of the piston and cylinder, said scavenging means including a groove in said cylinder wall in fixed relationship to said port means and adapted to communicate with said port means during movement of the piston, and a lip seal extending between the piston and cylinder for cooperating and controlling leakage of liquid there between.
  • a valveless positive displacement pump comprising: a cylinder having an inlet and outlet port; a piston in said cylinder for longitudinal reciprocation and rotational oscillation over an arc of less than 360 therein; said piston being formed with a duct means communicable with both of said ports during oscillation thereof, said piston adapted to provide with the cylinder interior a pump chamber adapted to vary in size upon reciprocation of the piston, said piston having an end disposed exteriorly of said cylinder; a pin extending laterally from the exterior end of the piston and means for rigidly connecting said pin to said piston; a drive means having an output shaft for inducing rotation of the shaft, the axis of the shaft being substantially parallel to the axis of the pin and at an angle to the axis of the piston; and coupling means for coupling the pin and the shaft to one another whereby upon rotation of the shaft said piston reciprocates and oscillates in a timed relationship relative to the cylinder to vary the pump chamber and, at the same time, expose said duct means to one of said ports and then the other
  • a valveless positive displacement pump comprising: a cylinder having an inlet and outlet port; a piston in said cylinder for longitudinal reciprocation and rotational oscillation over an arc of less than 360 therein; said piston being formed with a duct means communicable with 'both of said ports during oscillation thereof, said piston adapted to provide with the cylinder interior a pump chamber adapted to vary in size upon reciprocation of the piston, said piston having an end disposed exteriorly of said cylinder; a pin extending laterally from the exterior end of the piston and means for rigidly connecting said pin to said piston; a drive means having i the shaft, the axis of the shaft being substantially parallel an output shaft for inducing rotation 'of the shaft, the 4 axis of the shaft being substantially parallel to the axis of the pin and at an angle to the axis of the piston; and coupling means for coupling the pin and the shaft to one another whereby upon rotation of the shaft said piston reciprocates and oscillates in a timed relationship relative to the cylinder to vary the pump chamber and
  • said coupling means including a member connected to said shaft, said member having a recess, said coupling means also including a ball mounted on said pin, said ball being disposed in said recess and movable therein.
  • a valveless positive displacement pump comprising: a cylinder having an inlet and outlet port; a piston in said cylinder for longitudinal reciprocation and rotational oscillation therein; said piston 'being formed with a duct means communicable with both of said ports during oscillation thereof, said piston adapted to provide with the cylinder interior a pump chamber adapted to vary in isze upon reciprocation of the piston, said piston having an end disposed exteriorly of said cylinder; a pin extending laterally from the exterior end of the piston; a drive means having an output shaft for inducing rotation of the shaft,
  • a valveless positive displacement pump comprising:
  • a cylinder having an inlet and outlet port; a piston in said cylinder for longitudinal reciprocation and rotational oscillation therein; said piston being formed with a duct means communicable with both of said ports during oscillation thereof, said piston adapted to provide with the cylinder interior a pump chamber adapted to vary in size upon reciprocation of the piston, said piston having an end disposed exteriorly of said cylinder; a pin extending laterally from the exterior end of the piston; a drive means having an output shaft for inducing rotation of to the axis of the pin and at an angle to the axis of the piston; and coupling means for coupling the pin and the shaft to one another whereby upon rotation of the shaft said piston reciprocates and oscillates in a timed relationship relative to the cylinder to vary the pump chamber and, at the same time, expose said duct means to one of said ports and then the other to draw fluid to be pumped from one port through said duct means into the pump chamber and then out of the chamber through said duct means out through the other port, said coupling means being
  • adjustable drive connection is in the form of an ad justable cam adapted to be adjusted to vary the effective length of said adjustable drive connection and, consequently, the extent of reciprocation of said piston relative to the cylinder.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
US389702A 1964-08-14 1964-08-14 Positive displacement piston pump Expired - Lifetime US3257953A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US389702A US3257953A (en) 1964-08-14 1964-08-14 Positive displacement piston pump
DE19651528509 DE1528509A1 (de) 1964-08-14 1965-08-13 Kolbenverdraenger-Pumpe
GB34881/65A GB1109653A (en) 1964-08-14 1965-08-13 Positive displacement piston pump
ES0316507A ES316507A1 (es) 1964-08-14 1965-08-14 Una bomba de desplazamiento positivo, desprovista de valvulas.
NL6510705A NL6510705A (de) 1964-08-14 1965-08-16

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US389702A US3257953A (en) 1964-08-14 1964-08-14 Positive displacement piston pump

Publications (1)

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US3257953A true US3257953A (en) 1966-06-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
US389702A Expired - Lifetime US3257953A (en) 1964-08-14 1964-08-14 Positive displacement piston pump

Country Status (5)

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US (1) US3257953A (de)
DE (1) DE1528509A1 (de)
ES (1) ES316507A1 (de)
GB (1) GB1109653A (de)
NL (1) NL6510705A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3514230A (en) * 1968-12-19 1970-05-26 Gosta R Nordforss Proportioning pump
US3738230A (en) * 1970-06-26 1973-06-12 G Censi Variable stroke multiple pump
US5044889A (en) * 1990-05-16 1991-09-03 Dennis Pinkerton Phase adjustable metering pump, and method of adjusting the flow rate thereof
USRE34114E (en) * 1985-06-26 1992-10-27 Atochem North America, Inc. Positive displacement piston pump
US6224347B1 (en) 1999-09-13 2001-05-01 The Gorman-Rupp Company Low volume, high precision, positive displacement pump

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH636703A5 (fr) * 1980-10-01 1983-06-15 Sapal Plieuses Automatiques Machine de dosage pour produits de consistance liquide a pateuse.

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US313353A (en) * 1885-03-03 James
US973353A (en) * 1910-02-26 1910-10-18 Ariya Inokuty Valveless pump.
US1099155A (en) * 1911-03-07 1914-06-09 Otto C Ahlborn Pump.
US1267040A (en) * 1918-05-21 Boyers
US1633270A (en) * 1925-08-28 1927-06-21 Oswald A Olsen Compression pump
US2060076A (en) * 1933-01-30 1936-11-10 Carl F High Fuel pump
US2070203A (en) * 1934-11-05 1937-02-09 Eclipse Aviat Corp Oil pump
US2406599A (en) * 1946-08-27 Mechanical lubricator
FR1058498A (fr) * 1952-06-18 1954-03-16 Pompe
DE1023278B (de) * 1953-08-03 1958-01-23 Bosch Gmbh Robert Schmierpumpe mit Handantrieb durch Kurbel und einem um seine Achse drehbaren und gleichzeitig axial hin- und herbewegbaren, mit Steuerflaechen und/oder -nuten Saug- und Druckwege steuernden Foerderkolben

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US313353A (en) * 1885-03-03 James
US1267040A (en) * 1918-05-21 Boyers
US2406599A (en) * 1946-08-27 Mechanical lubricator
US973353A (en) * 1910-02-26 1910-10-18 Ariya Inokuty Valveless pump.
US1099155A (en) * 1911-03-07 1914-06-09 Otto C Ahlborn Pump.
US1633270A (en) * 1925-08-28 1927-06-21 Oswald A Olsen Compression pump
US2060076A (en) * 1933-01-30 1936-11-10 Carl F High Fuel pump
US2070203A (en) * 1934-11-05 1937-02-09 Eclipse Aviat Corp Oil pump
FR1058498A (fr) * 1952-06-18 1954-03-16 Pompe
DE1023278B (de) * 1953-08-03 1958-01-23 Bosch Gmbh Robert Schmierpumpe mit Handantrieb durch Kurbel und einem um seine Achse drehbaren und gleichzeitig axial hin- und herbewegbaren, mit Steuerflaechen und/oder -nuten Saug- und Druckwege steuernden Foerderkolben

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3514230A (en) * 1968-12-19 1970-05-26 Gosta R Nordforss Proportioning pump
US3738230A (en) * 1970-06-26 1973-06-12 G Censi Variable stroke multiple pump
USRE34114E (en) * 1985-06-26 1992-10-27 Atochem North America, Inc. Positive displacement piston pump
US5044889A (en) * 1990-05-16 1991-09-03 Dennis Pinkerton Phase adjustable metering pump, and method of adjusting the flow rate thereof
US6224347B1 (en) 1999-09-13 2001-05-01 The Gorman-Rupp Company Low volume, high precision, positive displacement pump

Also Published As

Publication number Publication date
GB1109653A (en) 1968-04-10
NL6510705A (de) 1966-02-15
ES316507A1 (es) 1966-05-01
DE1528509A1 (de) 1970-02-12

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