US3303787A - Pump - Google Patents

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Publication number
US3303787A
US3303787A US437324A US43732465A US3303787A US 3303787 A US3303787 A US 3303787A US 437324 A US437324 A US 437324A US 43732465 A US43732465 A US 43732465A US 3303787 A US3303787 A US 3303787A
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United States
Prior art keywords
plunger
pump
magnetized
casing
inlet
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Expired - Lifetime
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US437324A
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Inman Fred Waldo
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Individual
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Priority to US437324A priority Critical patent/US3303787A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F04B17/04Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
    • F04B17/046Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the fluid flowing through the moving part of the motor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04Feeding by means of driven pumps
    • F02M37/08Feeding by means of driven pumps electrically driven

Definitions

  • the present invention relates to a reciprocating pump driven by electrical energy pulses through the intermediary of an energy storing device, such as a spring. There is no mechanical connection lbetween the exterior electrical elements and the interior mechanical pumping elements. Therefore, no -uid seal is required.
  • the single ligure is a longitudinal crosssection through a preferred embodiment of my invention.
  • Pump casing 1 is substantially cylindrical and is made of a nonmagnetic material.
  • the inlet or suction end of the cylinder is closed by a member 2 and has an inlet check valve 3 therein to prevent backtiow of fluid as the pump plunger is drawn toward the inlet end of the pump.
  • the outlet or pressu-re end of the cylinder is closed by a member 4 and may have an outlet check valve 5 therein.
  • Magnetized plunger 6 may have a check valve 7 therein to permit uid to iiow through the plunger when the plunger is moved toward the inlet end of the pump and to prevent lluid dow throu-gh the plunger when it is moved toward the outlet end.
  • Solenoid coil 8 when energized, draws magnetizable plunger 6 toward the inlet end of the pump against the thrust of spring 9. Plunger 6 may, under certain conditions, approach the outlet end at a very rapid rate. Therefore, a buffer spring 10 may be added to absorb the energy of the fast travellin-g plunger and start it back toward the inlet end. This conserves the energy and minimizes shock and internal damage to the pump, eig. when the pump is racing and is pumping little or no uid.
  • Power ⁇ may be supplied to coil 8 from power source 11 through an electrical make-and-break system comprising points 12 and members 14, 15. Switch 16 may be used to start or stop the pump.
  • Magnetic flux from coil 8 passes through cylinder 1 and attracts magnetized pl-u-nger 6 toward the inlet end of the pump, compressing spring 9. Fluid trapped between plunger 6 and valve 3 is forced through the plunger and valve 7. As magnetized plunger 6 moves past magnetizable member 14 the magnetic circuit therebetween is broken, points 12 open and coil 8 is de-energized. Valve 7 closes and spring 9 forces plunger 6 toward the outlet end to pump tiuid out through valve 5. As the plunger approaches the outlet end the lmagnetic circuit is completed from 6 to 14, 15 and points 12 are closed to energize coil 8 to draw plunger 6 back toward the inlet end.
  • valve 5 or spring 10', or iboth, could be omitted.
  • these parts are simple and inexpensive and they add to proper functioning of the apparatus as explained hereinbefore.
  • This pump is simple and inexpensive in construction and efficient in operation. There is no mechanical seal between the lelectrical drivin-g element and the armaturepump plunger. No mechanical connections are required between the armature-pump plunger and the electrical make-and-break point set. Therefore, no uid seal is required because no mechanically moving part projects through the pump housing. This eliminates leakage and possible fire or explosion if the liuid being pumped is gas or gasoline, as examples.
  • Pump and motor means comprising: a substantially cylindrical casing; means to close one end of said casing; fluid inlet means adjacent to said end; inlet valve means for said fluid inlet means; means to close the other end of said casing; fluid outlet means adjacent to said other end of said casing; an outlet valve for said pump and motor means; magnetized pump plunger means in said casing; means urgin-g said plunger means in one direction; electromagnetic means urging said plunger means in the opposite direction when energized; and means to energize said electromagnetic means when said plunger means is moved to a position toward said outlet end; said electromagnetic means comprising a solenoid coil surrounding said cylindrical casing and said casing comprising a nonmagnetizable material whereby, upon energization of said solenoid coil, said magnetized pump plunger is attracted into said coil against ythe force of said means which urges the plunger means in said one direction; said means to energize said electromagnetic means comprisin-g; a magnetizable member operable to close and ope-n

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)

Description

Pah 14, 1967 Inlet' F. W. INMAN PUMP Filed March #3 1965 BYf Mw?? INVENTOR F7190 6J- Inman La@ "L ATTORNEYS.
United States Patent O The invention described herein may be manufactured and fused by or for the Government for governmental purposes, without the payment to me of any royalty thereon.
The present invention relates to a reciprocating pump driven by electrical energy pulses through the intermediary of an energy storing device, such as a spring. There is no mechanical connection lbetween the exterior electrical elements and the interior mechanical pumping elements. Therefore, no -uid seal is required.
This is an improvement over my copending application for Pump, filed January 7, 1965, Serial No. 424,155, now Patent No. 3,282,220.
In the drawing, the single ligure is a longitudinal crosssection through a preferred embodiment of my invention.
Pump casing 1 is substantially cylindrical and is made of a nonmagnetic material. The inlet or suction end of the cylinder is closed by a member 2 and has an inlet check valve 3 therein to prevent backtiow of fluid as the pump plunger is drawn toward the inlet end of the pump. The outlet or pressu-re end of the cylinder is closed by a member 4 and may have an outlet check valve 5 therein.
Magnetized plunger 6 may have a check valve 7 therein to permit uid to iiow through the plunger when the plunger is moved toward the inlet end of the pump and to prevent lluid dow throu-gh the plunger when it is moved toward the outlet end.
Solenoid coil 8, when energized, draws magnetizable plunger 6 toward the inlet end of the pump against the thrust of spring 9. Plunger 6 may, under certain conditions, approach the outlet end at a very rapid rate. Therefore, a buffer spring 10 may be added to absorb the energy of the fast travellin-g plunger and start it back toward the inlet end. This conserves the energy and minimizes shock and internal damage to the pump, eig. when the pump is racing and is pumping little or no uid.
Power `may be supplied to coil 8 from power source 11 through an electrical make-and-break system comprising points 12 and members 14, 15. Switch 16 may be used to start or stop the pump.
It will be noted that plunger 6 is different from that disclosed in my copending case identiiied above. The plunger is actually, permanently magnetized, not merely magnetizable to complete a magnetic circuit to members 14, 15. Therefore, as magnetized plunger 6 approaches member 14 the magnetic attraction draws element 15 down, to close points 12. This makes it possible to eliminate an exterior electro-magnet (as shown at 13 in my copending case) and yet retain the function. And, an increase in operating efciency is obtained Abecause the magnetized plunger 6 is attracted by electro-magnet 8 with a lower current and magnetic lield.
From the foregoing it is seen that a part has been eliminated, the function has been retained, and operating efficiency has been increased.
Operation Upon start-up the parts will assume the positions illustrated in the drawing. Magnetic 'force from magnetized plunger 6 travels through nonmfagnetic pump casing 1 to magnetizable mem-ber 14. The then magnetized mem- Iber 14 attracts magnetizable member 15 to draw points 12 together thereby completing the circuit to coil 8.
Magnetic flux from coil 8 passes through cylinder 1 and attracts magnetized pl-u-nger 6 toward the inlet end of the pump, compressing spring 9. Fluid trapped between plunger 6 and valve 3 is forced through the plunger and valve 7. As magnetized plunger 6 moves past magnetizable member 14 the magnetic circuit therebetween is broken, points 12 open and coil 8 is de-energized. Valve 7 closes and spring 9 forces plunger 6 toward the outlet end to pump tiuid out through valve 5. As the plunger approaches the outlet end the lmagnetic circuit is completed from 6 to 14, 15 and points 12 are closed to energize coil 8 to draw plunger 6 back toward the inlet end.
1f desired, valve 5, or spring 10', or iboth, could be omitted. However, these parts are simple and inexpensive and they add to proper functioning of the apparatus as explained hereinbefore.
This pump is simple and inexpensive in construction and efficient in operation. There is no mechanical seal between the lelectrical drivin-g element and the armaturepump plunger. No mechanical connections are required between the armature-pump plunger and the electrical make-and-break point set. Therefore, no uid seal is required because no mechanically moving part projects through the pump housing. This eliminates leakage and possible fire or explosion if the liuid being pumped is gas or gasoline, as examples.
During a large percentage of the time no electrical power is required. Electrical power is used for a splitsecond and -this power is converted to potential energy st-ored in spring 9. That energy then stands ready to pump fluid instantly upon demand, or to pump slowly over a period of seconds, minutes or hours, or to pump fluid when called upon at a much later time, and, until that stored energy is used, no further electrical power is required.
I claim:
Pump and motor means comprising: a substantially cylindrical casing; means to close one end of said casing; fluid inlet means adjacent to said end; inlet valve means for said fluid inlet means; means to close the other end of said casing; fluid outlet means adjacent to said other end of said casing; an outlet valve for said pump and motor means; magnetized pump plunger means in said casing; means urgin-g said plunger means in one direction; electromagnetic means urging said plunger means in the opposite direction when energized; and means to energize said electromagnetic means when said plunger means is moved to a position toward said outlet end; said electromagnetic means comprising a solenoid coil surrounding said cylindrical casing and said casing comprising a nonmagnetizable material whereby, upon energization of said solenoid coil, said magnetized pump plunger is attracted into said coil against ythe force of said means which urges the plunger means in said one direction; said means to energize said electromagnetic means comprisin-g; a magnetizable member operable to close and ope-n a circuit to said electromagnetic means; said magnetized pump plunger means serving to attract said ma-g- References Cited by the Examiner netizable member as said plunger approaches said other UNITED STATES PATENTS end of said casing to thereby close said circu1t to said it approaches said other end and to assist in returning said plunger toward said one end; and an additional l0 outlet valve in the path of iluid ow past said plunger.
ROBERT M. WALKER, Primary Examiner.
US437324A 1965-03-04 1965-03-04 Pump Expired - Lifetime US3303787A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4150925A (en) * 1977-09-02 1979-04-24 California Institute Of Technology Fast acting check valve
US4465439A (en) * 1979-10-25 1984-08-14 Tohoku Mikuni Kogyo Co., Ltd. Magnetically-coupled reciprocating pump
US4496292A (en) * 1978-07-18 1985-01-29 Webasto-Werk W. Baier Gmbh & Co. Electromagnetic fuel delivery and metering pump
US4735185A (en) * 1985-06-14 1988-04-05 Nippondenso Co., Ltd. Apparatus for feeding high-pressure fuel into engine cylinder for injection control
EP1503078A1 (en) * 2003-07-30 2005-02-02 INVENSYS CONTROLS ITALY Srl Electromagnetic pump with oscillating core
WO2015169478A1 (en) * 2014-05-08 2015-11-12 Robert Bosch Gmbh Fuel pump and method for operating same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2293684A (en) * 1940-05-13 1942-08-18 Galvin Mfg Corp Electromagnetic pump
US2322913A (en) * 1939-04-22 1943-06-29 Frank C Best Pump
US2490505A (en) * 1948-01-16 1949-12-06 Pierce Governor Company Inc Slapless magnetically reciprocable structure
US2706795A (en) * 1952-08-25 1955-04-19 Bendix Aviat Corp Reciprocating electromagnetic motor
US2768580A (en) * 1955-01-25 1956-10-30 Bendix Aviat Corp Reciprocating electromagnetic pump

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2322913A (en) * 1939-04-22 1943-06-29 Frank C Best Pump
US2293684A (en) * 1940-05-13 1942-08-18 Galvin Mfg Corp Electromagnetic pump
US2490505A (en) * 1948-01-16 1949-12-06 Pierce Governor Company Inc Slapless magnetically reciprocable structure
US2706795A (en) * 1952-08-25 1955-04-19 Bendix Aviat Corp Reciprocating electromagnetic motor
US2768580A (en) * 1955-01-25 1956-10-30 Bendix Aviat Corp Reciprocating electromagnetic pump

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4150925A (en) * 1977-09-02 1979-04-24 California Institute Of Technology Fast acting check valve
US4496292A (en) * 1978-07-18 1985-01-29 Webasto-Werk W. Baier Gmbh & Co. Electromagnetic fuel delivery and metering pump
US4465439A (en) * 1979-10-25 1984-08-14 Tohoku Mikuni Kogyo Co., Ltd. Magnetically-coupled reciprocating pump
US4735185A (en) * 1985-06-14 1988-04-05 Nippondenso Co., Ltd. Apparatus for feeding high-pressure fuel into engine cylinder for injection control
EP1503078A1 (en) * 2003-07-30 2005-02-02 INVENSYS CONTROLS ITALY Srl Electromagnetic pump with oscillating core
US20050025638A1 (en) * 2003-07-30 2005-02-03 Invensys Controls Italy Srl Electromagnetic pump with oscillating core
WO2015169478A1 (en) * 2014-05-08 2015-11-12 Robert Bosch Gmbh Fuel pump and method for operating same
CN106460748A (en) * 2014-05-08 2017-02-22 罗伯特·博世有限公司 Fuel pump and method for operating a fuel pump
JP2017515049A (en) * 2014-05-08 2017-06-08 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツングRobert Bosch Gmbh Fuel pump and method for operating the fuel pump
CN106460748B (en) * 2014-05-08 2022-04-05 罗伯特·博世有限公司 Fuel pump and method for operating a fuel pump

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