US1375200A - Pumping apparatus - Google Patents

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US1375200A
US1375200A US248423D US24842318D US1375200A US 1375200 A US1375200 A US 1375200A US 248423 D US248423 D US 248423D US 24842318 D US24842318 D US 24842318D US 1375200 A US1375200 A US 1375200A
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pump
proportional
pumping
cylinder
liquid
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William S Barnickel
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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
    • F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
    • F04B13/02—Pumps specially modified to deliver fixed or variable measured quantities of two or more fluids at the same time
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F19/00—Wheel guards; Bumpers; Obstruction removers or the like
    • B61F19/06—Nets, catchers, or the like for catching obstacles or removing them from the track
    • B61F19/08—Nets, catchers, or the like for catching obstacles or removing them from the track of the drop-down type
    • B61F19/10—Nets, catchers, or the like for catching obstacles or removing them from the track of the drop-down type automatically operated by engagement with obstacle
    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/12—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air
    • F04B9/129—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers
    • F04B9/131—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers with two mechanically connected pumping members
    • F04B9/133—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers with two mechanically connected pumping members reciprocating movement of the pumping members being obtained by a double-acting elastic-fluid motor
    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/12—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air
    • F04B9/129—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers
    • F04B9/137—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers the pumping members not being mechanically connected to each other
    • F04B9/1372—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers the pumping members not being mechanically connected to each other the movement of each pump piston in the two directions is obtained by a double-acting piston fluid motor

Definitions

  • T o a?? wiz-om. 'it may concern:
  • This invention relates to apparatus of the type thatl are used for simultaneouslypumping twoor more streams of liquid of .different volumes.
  • @ne object of my present invention is to provide a pumping apparatus of the general type referred to which is so constructed that it can be adjusted easily to vary the volumef of one of the streams of liquid without varying the volume of the other stream or streams pumped by the apparatus.
  • Another object is to provide a pumping apparatus ofthe general type referred 'to which is so constructed that it can be successfully used for simultaneously pumping two streams of liquid, the volume of one o which is intinitesimally small as compared with the volume of the other stream.
  • Another object isto provide a pumping apparatus of the. kind referred to which is so constructed that the means which pumps the small stream can be adjusted easily while the apparatus is in operation so as to increase or diminish the volume of the Small stream without interfering with or changing the operation of the means that pumps the large stream.
  • Another object is to provide a pumping apparatus that consists of a proportional pump and a main pump combined in such a manner vthat the operating medium used to actuate the main pump is also used to actuate the proportional pump, and furthermore ⁇ is controlled solely by the governing device on the main pump thatvcontrols the supply of operating medium to said main pump.
  • Still another object is to provide a proportional pump of novel construction that can be easily combined with various types of pumps operated by steam or other expansible mediums without mechanically connecting the piston of the proportional pump with the piston or other moving part of the pump with which it is combined.
  • FIG.l of the drawings is a perspective view of a multiple stream pumping apparatus constructed in accordance with my invention.
  • Fig. 2 is a vertical sectional view of the proportional pump and part of the main pump with which it is used.
  • My apparatus can be" used in numerous arts for iandling various kinds of liquids, but it is particularly adapted for use in an oil treating apparatus of the kind described in my pending application Serial Number 248,422, filed ugust l5, 1918, owing to the fact that it is capable of drawing an ininitesimally small quantity of liquid from a Y source of supply and introducing it into a relatively great quantity of liquid that is drawn from a separate source of supply. It is also particularly adapted for use with an oil treating apparatus of the kind referred to, owing to the fact that the proportional pump which forms part of my ⁇ present apparatus is of such design that it can be easily hooked up with or combined with pumps of the kind generally used in the oil fields for pumping oil through pipe lines.
  • A designates a pump that I will designate as the main pump and B designates a proportional pump that is combined with the main pump A in such a manner that the operating medium used to actuate the pump A is also used to actuate the proportional pump B, and furthermore, is governed by the device on the pump A that controls the admission and exhaust of the operating medium to and from the operating cylinder of said main pump A.
  • the pump A preferably consists of a duplex steam pump that comprises operating cylinders l, pumping cylinders 2, a steam chest 3 provided Witha D-valve of conventional form for governing the admission of steam to and from the operating cylinders and a valve casing 4 provided with two sets of inlet valves and exhaust valves, said pump A being used for ldrawing a stream of liquid of relatively great volume from a supply tank 5 through an inlet pipe 6 leading from said supply tank to the inlet of the pumping cylinders of' the pump A and then forcing said stream through a discharge line 7.
  • the proportional pump B is of the same eneral construction as the main pump A, ut 1t is infnitesimally small as compared with the pump A.
  • the proportional pump can have a l inch bore and a 292 inch stroke and the main pump A a 6 inch bore and a 10 inch stroke.
  • the respective sizes 'of the pumps A and B, of' course, are immaterial, but the point that I desire to emphasize is that the proportional pump may be made small enough so that it will handle only a fraction of the quantity of liqiatad handled by the pump A.
  • he proportionalpump B comprises an operating cylinder 8 provided with a piston 9, a pumping cylinder 10 provided with a piston or plunger 11 which is connected by means of a rod or stem 12 to the piston 9y of the operating cylinder and a valve casing 13 mounted on the pumping cylinder 10 and vprovided with a pair of inlet valves 14 and a pair of discharge valves 15, said valve casing having an inlet pipe 16 that leads. from a supply of liquid and a discharge pipe 17 that leads to the inlet pipe 6 through which the liquid from the supply tank 5 is drawn into the pumping cylinders of the main pump A.
  • the opposite ends of the operatlng cylinder 8 of the proportional pump are connected by means of pipes 18 and 18'l to the opposite ends of one of the operating cylinders 1 of the main pump A, so as to cause steam to be admitted to and exhausted from the operating cylinder 8 of the proportional pump when steam is admitted to and exhausted from the opposite ends of the operating cylinders of the main pump A by means of the D-Valve arranged in the valve chest 3 of the main pump.
  • I insure a uniform quantity of liquid being drawn into ,and discharged from the pumping cylinder' of the proportional pump at each cycle of operations of the apparatus, which quantity of liquid bears a certain definite or fixed relation to the quantity of liquid handled by the main pump A
  • the apparatus may be ad'usted so as to vary the size or Volume o one of the streams khandled by the apparatuswithoutvarying at each cycle of operations of the apparatus.
  • the proportional pump with an adjustable means that can be set in various positions so as to increase or decrease the stroke ot' the pistons. in the operating cylinder and pumping cylinder of the proportional pump without changing the stroke of the pistons in the operating cylinders of the mam ump A
  • Said means preferably consists of an adjustable stop 19 that projects inwardly through a stufiing box in the head of' the operating cylinder 8 of the proportional pump B, said stop being adjustably mounted in a yoke 2() mounted on the head of the cylinder 8.
  • the main pump A When t e apparatus is in operation the main pump A will draw. a definite quantity of liquid from the source ofsupply contained in the tank 5 at each cycle of operations of the apparatus, and the proportional pum will draw a definite quantity of liquid t rough the supply line 16 and introduce it into the stream of liquid flowing through the discharge pipe 6 leading from the supply tank 5. It the position of the stop 19 is not changed the volume of the two streams handled by the main pump A and the proportional pump B will, remain constant, thereby causing a definite quantity of liquid from one source of supply to be introduced into a definite quantity of liquid drawn from a separate source of supply at each cycle of operations of the apparatus.
  • pumping cylinder of the main pump as my broad idea consists of a proportional pumping apparatus provided with independentlyoperating means, actuated by the same op' erating medium, for simultaneously pumping two or more streams of liquid from the same or from different sources of supply.
  • the relative capacities of the main pump and the proportional pump are, of courseIl immaterial, but one desirable feature of a pumping apparatus of this construction is that the means which handles one of the streams can be infinitestimally small as compared with the means that handles the other stream.
  • the apparatus herein illustrated is particularly adapted for use in an oil treating apparatus of the kind de, scribed in my pending application previ ously referred to, owing to the fact that it is sometimes necessary to mix the treating solution with the oil being treated in proportions of about six barrels of treating solution to one thousand or two thousand barrels of oil.
  • proportional pumping apparatus herein illustrated which makes-it particularly adapted for use with an oil treating apparatus, is that the proportional pump B can be easily combined with or hooked up with pumps of the kind that are generally used in the voil fields for forcing oil through pipe lines, owing to the fact that there is no mechanical connection between the pistons or moving
  • the pipes 18 and 18a that connect the operating cylinder 8 of the proportional pump with the opposite ends of one of the operating cylinders of the main pump are prefe') ably provided with valves 18", so as to ena le the proportional pump to be cut out of/ service in case it is desired to use the main pump independently of the proportional pump.
  • the horizontal branches of said pipes are also provided with drain cocks 18g, as shown in Fig. 2, so as to enable the cylinders of both pumps to" be drained when the apparatus 1s not 1n use.
  • a pumping apparatus comprising a reciprocating proportional pump provided with means for enabling the volume or quantity of the stream pumped by same to be increased or diminished, a main pump of the reciprocating type, and conduits 'separate Another characteristic ofthe exhaust pipes of said steam pump for establishing connection between the opposite ends of the cylinder of the steam pump and the correspondingv ends of the operating cylinder of the proportional pump 3.
  • a pumping apparatus comprising a main steam-pump provided with an operating cylinder.
  • a proportional pump comprisingA an operating cylinder and a pumping cylinder, means separate and distinct from the supply and exhaust pipes of said steam pump for establishing connection between the opposite ends of the cylinder of the steam pump and the corresponding ends of the operating cylinder of, the proportional pump, and an adjustable meansy for governing the stroke of the piston in the operating cylinder of the proportional pump,
  • a pumping-apparatus composed of a proportional pump comprising an operating cylinder and a pumping cylinder, an inlet valve and a discharge valve for said pumping cylinder, pistons i said cylinders mechanically connected t gether, an actuatin lpump 'combined with said proportiona pump and provided with a cylinder to which an operating medium is supplied and ex.

Description

W. S. BARNICKEL.
PUMPING APPARATUS.
APPLic/won FILED AUG.5. 191s.
Patented Apr. 19, i921.
mfywa PATENT OFFICE.
UNITED STATES WILLIAM S. BARNICKL, F ST. LOUIS, MISSOURI.
PUMPING APPARATUS.
Specification of Letters I'atent.
Patented Apr. 19, 1921.
Application filed August 5, 1918. Serial No. 248,423.
T o a?? wiz-om. 'it may concern:
Be it known that I, WILLIAM S. BAR? such as will enable others skilled in the art to which it appertains to make andluse the 1lil same.
' This invention relates to apparatus of the type thatl are used for simultaneouslypumping twoor more streams of liquid of .different volumes.
@ne object of my present invention is to provide a pumping apparatus of the general type referred to which is so constructed that it can be adjusted easily to vary the volumef of one of the streams of liquid without varying the volume of the other stream or streams pumped by the apparatus.
Another object is to provide a pumping apparatus ofthe general type referred 'to which is so constructed that it can be successfully used for simultaneously pumping two streams of liquid, the volume of one o which is intinitesimally small as compared with the volume of the other stream.
Another object isto provide a pumping apparatus of the. kind referred to which is so constructed that the means which pumps the small stream can be adjusted easily while the apparatus is in operation so as to increase or diminish the volume of the Small stream without interfering with or changing the operation of the means that pumps the large stream.
Another object is to provide a pumping apparatus that consists of a proportional pump and a main pump combined in such a manner vthat the operating medium used to actuate the main pump is also used to actuate the proportional pump, and furthermore` is controlled solely by the governing device on the main pump thatvcontrols the supply of operating medium to said main pump.
And still another object is to provide a proportional pump of novel construction that can be easily combined with various types of pumps operated by steam or other expansible mediums without mechanically connecting the piston of the proportional pump with the piston or other moving part of the pump with which it is combined.
ing is a full, clear, and exact description,
Other objects and desirablefeatures of my invention will be hereinafter pointed out.
Figure .l of the drawings is a perspective view of a multiple stream pumping apparatus constructed in accordance with my invention; and
Fig. 2 is a vertical sectional view of the proportional pump and part of the main pump with which it is used.
My apparatus can be" used in numerous arts for iandling various kinds of liquids, but it is particularly adapted for use in an oil treating apparatus of the kind described in my pending application Serial Number 248,422, filed ugust l5, 1918, owing to the fact that it is capable of drawing an ininitesimally small quantity of liquid from a Y source of supply and introducing it into a relatively great quantity of liquid that is drawn from a separate source of supply. It is also particularly adapted for use with an oil treating apparatus of the kind referred to, owing to the fact that the proportional pump which forms part of my `present apparatus is of such design that it can be easily hooked up with or combined with pumps of the kind generally used in the oil fields for pumping oil through pipe lines. `While I have herein illustrated my invention embodied in an apparatus provided with means for pumping` two streams of liquid of different volumes, I wish it to be understood that it is immaterial, so far as my invention is concerned, Whether the apparatus is constructed to handle two streams or more than two streams.
Referring to the drawings which illustrate the preferred form of my invention, A designates a pump that I will designate as the main pump and B designates a proportional pump that is combined with the main pump A in such a manner that the operating medium used to actuate the pump A is also used to actuate the proportional pump B, and furthermore, is governed by the device on the pump A that controls the admission and exhaust of the operating medium to and from the operating cylinder of said main pump A. The pump A preferably consists of a duplex steam pump that comprises operating cylinders l, pumping cylinders 2, a steam chest 3 provided Witha D-valve of conventional form for governing the admission of steam to and from the operating cylinders and a valve casing 4 provided with two sets of inlet valves and exhaust valves, said pump A being used for ldrawing a stream of liquid of relatively great volume from a supply tank 5 through an inlet pipe 6 leading from said supply tank to the inlet of the pumping cylinders of' the pump A and then forcing said stream through a discharge line 7. The proportional pump B is of the same eneral construction as the main pump A, ut 1t is infnitesimally small as compared with the pump A. For example, the proportional pump can have a l inch bore and a 292 inch stroke and the main pump A a 6 inch bore and a 10 inch stroke. The respective sizes 'of the pumps A and B, of' course, are immaterial, but the point that I desire to emphasize is that the proportional pump may be made small enough so that it will handle only a fraction of the quantity of liqiriid handled by the pump A.
he proportionalpump B comprises an operating cylinder 8 provided with a piston 9, a pumping cylinder 10 provided with a piston or plunger 11 which is connected by means of a rod or stem 12 to the piston 9y of the operating cylinder and a valve casing 13 mounted on the pumping cylinder 10 and vprovided with a pair of inlet valves 14 and a pair of discharge valves 15, said valve casing having an inlet pipe 16 that leads. from a supply of liquid and a discharge pipe 17 that leads to the inlet pipe 6 through which the liquid from the supply tank 5 is drawn into the pumping cylinders of the main pump A. The opposite ends of the operatlng cylinder 8 of the proportional pump are connected by means of pipes 18 and 18'l to the opposite ends of one of the operating cylinders 1 of the main pump A, so as to cause steam to be admitted to and exhausted from the operating cylinder 8 of the proportional pump when steam is admitted to and exhausted from the opposite ends of the operating cylinders of the main pump A by means of the D-Valve arranged in the valve chest 3 of the main pump. By combining the proportional pump B with the main pump A in this manner I obtain simultaneous operation of both pumps without the aid of any mechanical connection between the pistons or other moving parts of the pumps. Furthermore, I insure a uniform quantity of liquid being drawn into ,and discharged from the pumping cylinder' of the proportional pump at each cycle of operations of the apparatus, which quantity of liquid bears a certain definite or fixed relation to the quantity of liquid handled by the main pump A In order that the apparatus may be ad'usted so as to vary the size or Volume o one of the streams khandled by the apparatuswithoutvarying at each cycle of operations of the apparatus.
have provided the proportional pump with an adjustable means that can be set in various positions so as to increase or decrease the stroke ot' the pistons. in the operating cylinder and pumping cylinder of the proportional pump without changing the stroke of the pistons in the operating cylinders of the mam ump A Said means preferably consists of an adjustable stop 19 that projects inwardly through a stufiing box in the head of' the operating cylinder 8 of the proportional pump B, said stop being adjustably mounted in a yoke 2() mounted on the head of the cylinder 8. 4By adjusting the stop 19 inwardly the stroke of the pistons in the operating cylinder and lpumpmg cylinder of the pump B can be reduced so as to diminish the quantity of liquid drawn into and discharged from the pumping cylinder of the proportional pump .at each cycle of operations of the apparatus, and by moving said adjustable stop in the opposite direction the stroke of said pistons can be increased so as to increase the supply of liquid drawn into and discharged from the pumping cylinder of the proportional pump. A means of' the construction above referred to for varying the Volume of the stream of liquid handled by the proportional pump is' of simple design; it is efiicient and it enables the proportional pump to be adjusted while the apparatus is in operation. It is, of course, obvious that any change in the adjustment of the proportional pump has absolutely no effect on the quantity of liquid handled b the main pump A.
When t e apparatus is in operation the main pump A will draw. a definite quantity of liquid from the source ofsupply contained in the tank 5 at each cycle of operations of the apparatus, and the proportional pum will draw a definite quantity of liquid t rough the supply line 16 and introduce it into the stream of liquid flowing through the discharge pipe 6 leading from the supply tank 5. It the position of the stop 19 is not changed the volume of the two streams handled by the main pump A and the proportional pump B will, remain constant, thereby causing a definite quantity of liquid from one source of supply to be introduced into a definite quantity of liquid drawn from a separate source of supply at each cycle of operations of the apparatus. If it is desired to vary the volume or the quantity of liquid handled by the proportional pump B either to increase or diminish same, this can be effected easily by simply adjusting the stop 19 in the proper direction, and furthermore, Without the necessity of shutting whether or not the discharge pipe from the proportional pump leads into'the inlet pipe through -'Which liquid is drawn into the lll@ vparts of the respective pumps.
pumping cylinder of the main pump, as my broad idea consists of a proportional pumping apparatus provided with independentlyoperating means, actuated by the same op' erating medium, for simultaneously pumping two or more streams of liquid from the same or from different sources of supply. The relative capacities of the main pump and the proportional pump are, of courseIl immaterial, but one desirable feature of a pumping apparatus of this construction is that the means which handles one of the streams can be infinitestimally small as compared with the means that handles the other stream. Consequently, the apparatus herein illustrated is particularly adapted for use in an oil treating apparatus of the kind de, scribed in my pending application previ ously referred to, owing to the fact that it is sometimes necessary to mix the treating solution with the oil being treated in proportions of about six barrels of treating solution to one thousand or two thousand barrels of oil. proportional pumping apparatus herein illustrated which makes-it particularly adapted for use with an oil treating apparatus, is that the proportional pump B can be easily combined with or hooked up with pumps of the kind that are generally used in the voil fields for forcing oil through pipe lines, owing to the fact that there is no mechanical connection between the pistons or moving The pipes 18 and 18a that connect the operating cylinder 8 of the proportional pump with the opposite ends of one of the operating cylinders of the main pump are prefe') ably provided with valves 18", so as to ena le the proportional pump to be cut out of/ service in case it is desired to use the main pump independently of the proportional pump. The horizontal branches of said pipes are also provided with drain cocks 18g, as shown in Fig. 2, so as to enable the cylinders of both pumps to" be drained when the apparatus 1s not 1n use. f i
Having thus described my invention, what I claim and desire to secure by Letters Patent is:
1. A pumping apparatus, comprising a reciprocating proportional pump provided with means for enabling the volume or quantity of the stream pumped by same to be increased or diminished, a main pump of the reciprocating type, and conduits 'separate Another characteristic ofthe exhaust pipes of said steam pump for establishing connection between the opposite ends of the cylinder of the steam pump and the correspondingv ends of the operating cylinder of the proportional pump 3. A pumping apparatus, comprising a main steam-pump provided with an operating cylinder. and a piston reciprocatingly mounted in said cylinder, a valve for controlling the admission and exhaust of the steam to and from said cylinder, a proportional pump comprisingA an operating cylinder and a pumping cylinder, means separate and distinct from the supply and exhaust pipes of said steam pump for establishing connection between the opposite ends of the cylinder of the steam pump and the corresponding ends of the operating cylinder of, the proportional pump, and an adjustable meansy for governing the stroke of the piston in the operating cylinder of the proportional pump,
4. A pumping-apparatus composed of a proportional pump comprising an operating cylinder and a pumping cylinder, an inlet valve and a discharge valve for said pumping cylinder, pistons i said cylinders mechanically connected t gether, an actuatin lpump 'combined with said proportiona pump and provided with a cylinder to which an operating medium is supplied and ex.
hausted, and conduits se arate and distinct from the' supply and ex aust 4pipes of the actuating pum that connect the opposite ends of the cylinder of said actuating pum with the opposite ends of the operating cy inder of theproportional pump for admit- A ting and exhausting the ope 'ating medium to and fromV the `operating cylinder of sald Jproportional pump. y
WILLIAM S. BARNICKEL.
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2427818A (en) * 1945-12-29 1947-09-23 Malsbary Mfg Company Pump
US2627453A (en) * 1948-03-17 1953-02-03 Milton Roy Co Automatic titration system
US2627813A (en) * 1947-07-31 1953-02-10 Laval Separator Co De Proportional pumping apparatus
US2672405A (en) * 1950-07-13 1954-03-16 Milton Roy Co Titration system
US2814252A (en) * 1952-12-31 1957-11-26 Bendix Aviat Corp Accumulator
US3144831A (en) * 1961-07-13 1964-08-18 Beckman Instruments Inc Fluid gradient engine
US3230887A (en) * 1962-10-29 1966-01-25 Beckman Instruments Inc Even flow apparatus and method for fluid gradient engines and the like
US3597114A (en) * 1968-01-30 1971-08-03 Ceskoslovenska Akademie Ved Pump assembly with uniform or programmed discharge
US4699044A (en) * 1985-04-22 1987-10-13 Maremont Corporation Fluid cylinder device with precision stroke adjustment
EP3641274A1 (en) 2012-11-13 2020-04-22 Gogo LLC Ground system for vehicle data distribution

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2427818A (en) * 1945-12-29 1947-09-23 Malsbary Mfg Company Pump
US2627813A (en) * 1947-07-31 1953-02-10 Laval Separator Co De Proportional pumping apparatus
US2627453A (en) * 1948-03-17 1953-02-03 Milton Roy Co Automatic titration system
US2672405A (en) * 1950-07-13 1954-03-16 Milton Roy Co Titration system
US2814252A (en) * 1952-12-31 1957-11-26 Bendix Aviat Corp Accumulator
US3144831A (en) * 1961-07-13 1964-08-18 Beckman Instruments Inc Fluid gradient engine
US3230887A (en) * 1962-10-29 1966-01-25 Beckman Instruments Inc Even flow apparatus and method for fluid gradient engines and the like
US3597114A (en) * 1968-01-30 1971-08-03 Ceskoslovenska Akademie Ved Pump assembly with uniform or programmed discharge
US4699044A (en) * 1985-04-22 1987-10-13 Maremont Corporation Fluid cylinder device with precision stroke adjustment
EP3641274A1 (en) 2012-11-13 2020-04-22 Gogo LLC Ground system for vehicle data distribution

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