US3716071A - Fluidic logic device - Google Patents

Fluidic logic device Download PDF

Info

Publication number
US3716071A
US3716071A US00187431A US3716071DA US3716071A US 3716071 A US3716071 A US 3716071A US 00187431 A US00187431 A US 00187431A US 3716071D A US3716071D A US 3716071DA US 3716071 A US3716071 A US 3716071A
Authority
US
United States
Prior art keywords
chamber
passage
fluid
passages
valve member
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
US00187431A
Other languages
English (en)
Inventor
W Passera
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Application granted granted Critical
Publication of US3716071A publication Critical patent/US3716071A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15C—FLUID-CIRCUIT ELEMENTS PREDOMINANTLY USED FOR COMPUTING OR CONTROL PURPOSES
    • F15C3/00—Circuit elements having moving parts
    • F15C3/005—Circuit elements having moving parts using loose plates or foils
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87153—Plural noncommunicating flow paths

Definitions

  • each of the first and second passages has one or more Field 251/61 1 channels machined into the surface which is sur- [5 6]
  • the split ring can be expanded to seal the first and second passages from each other if the channels of these passages are 20 Claims, 17 Drawing Figures SHEET 1 [1F 9 PATENTEDfEB 13 1915 wvewrm Walter PASSERA SHEET 8 BF 9 PATENTEI] FEB I 3 I973 OJ w FLUIDIC LOGIC DEVICE BACKGROUND OF THE INVENTION
  • the present invention relates to fluidic devices, and more particularly to improvements in fluidic logic devices which can be operated by a hydraulic or pneumatic control fluid and employ one or more valve members which are confined in a housing and are movable between several positions to thereby vary fluid connections between a plurality of fluid paths in the housing.
  • the invention relates to improvements in fluidic logic devices of the type known as hydrosistors (a term which has been coined after transistor owing to a certain analogy between the functions and fields of utilization of transistors and hydrosistors) wherein variations in the pressure of fluid in one or more control lines effect controlled changes in the position or positions of one or more valve members so as to permit or prevent the flow of one or more controlled hydraulic or pneumatic fluid streams between one or more supply conduits and one or more discharge conduits.
  • hydrosistors a term which has been coined after transistor owing to a certain analogy between the functions and fields of utilization of transistors and hydrosistors
  • Austrian Pat. No. 276,892 discloses a fluidic device wherein a housing defines a cylindrical chamber for reception of a plate-like or piston-like valve member which is movable axially with a considerable amount of clearance.
  • the valve member seals a passage for admission of a control fluid stream at one axial end of the chamber from passages for supply and discharge of a controlled fluid at the other axial end of the chamber.
  • the valve member moves against a seat at the other axial end of the chamber and thereby seals the supply passage from the discharge passage.
  • the valve member moves away from the seat and allows the controlled fluid to flow between the supply and discharge passages.
  • the pressure of fluid which is admitted by way of the supply passage then moves the valve member to a position in which it seals the control passage from the chamber.
  • Such fluidic devices occupy a substantial amount of space.
  • U.S. Pat. No. 3,362,633 to Freeman discloses a fluidic device wherein the housing defines an elongated for a disk-shaped pill.
  • the control passage communicates with one end of the slot, and the other end of the slot communicates with a supply port and a discharge port.
  • the fluid pressure in the control passage rises, the pill is shifted sideways to move against-a seatin the slot and to thereby seal the two ports from each. other.
  • the fluid pressure in the control passage decreases, the fluid pressure in the supply I port moves the pill away from the seat and the two ports are free to communicate with each other.
  • the patent to Freeman further discloses a ring-shaped valve member which can be used as a substitute for the diskshaped pill.
  • a drawback of such fluidic devices is that,
  • An object of the invention is to provide a fluidic logic device wherein the housing can provide one or more paths for the flow of substantial quantities of a controlled hydraulic or gaseous fluid medium even though the mass of the movable part or parts is small and even though the movable part or parts are called upon to perform strokes of short length and duration.
  • Another object of the invention is to provide a fluidic logic device which is highly resistant to wear, shocks and other mechanical influences, which can be readily protected against penetration and is not appreciably affected by eventual presence of foreign matter, and which can stand substantial thermal stresses without any appreciable influence upon its performance.
  • a further object of the invention is to provide a fluidic logic device which can be designed to act as an amplifier or as an AND-, NO- or OR-gate in a wide variety of hydraulic or pneumatic control system.
  • An additional object of the invention is to provide a fluidic logic device which can operate properly even though its parts need not be machined or otherwise shaped and/or assembled with a high degree of precision, which can stand long periods of frequent use, and
  • slot of rectangular cross section and with rounded ends I which can be used as a superior substitute for presently known fluidic logic devices.
  • a further object of the invention is to provide a negative or positive hydrosistor wherein the mass of the movable valve member or members is less than in presently known hydrosistors.
  • Still another object of the invention is to provide a system using one or more novel and improved fluidic logic devices wherein one or more power streams of controlled fluid can be selectively switched into different output paths by one or more control fluid streams.
  • the invention is embodied in a hydaulically and/or pneumatically operated fluidic logic device which comprises a housing preferably consisting of two or more separable parts in the form of laminates or the like and has at least one ring-shaped chamber and a plurality of passages communicating with the chamber and including a fluid-supplying first passage, a fluid-discharging second passage and a third passage for admission of a control fluid stream at a variable pressure, and an elastically deformable slotted annular valve member which resembles a split ring and is received in the chamber with freedom of radial expanding or contracting movement in response to pressure changes in the first and/or third passage to move to and from a sealing position in which it separates the first and second passages from each other.
  • the power stream of fluid which is admitted by way of the first passage can enter the second passage when the pressure of the control fluid stream is such that the valve member moves from its sealing position.
  • the housing is provided with first seat means which can be formed by the concave surface or surfaces of one or more arcuate ribs surrounding the ring-shaped chamber, and with second seat means which may be formed by the convex surface or surfaces of one or more arcuate ribs which are surrounded by the chamber.
  • the third passage communicates with the chamber in the region of one seat means and the first and second passages communicate with the chamber in the region of the other seat means.
  • the other seat means may surround the ring-shaped chamber; the valve member is then preferably received in the chamber in such prestressed condition that it normally bears against the other seat means, i.e., the valve member tends to expand. Inversely, if the other seat means is surrounded by the chamber, the valve memberis inserted in prestressed condition in such a way that it normally bears against the other seat means, i.e., the valve member tends to contract.
  • FIG. 1 is a substantially central vertical sectional view of a fluidic logic device which constitutes a negative hydrosistor or NO-gate and is constructed in accordance with a first embodiment of the invention, the valve member being shown in a first position;
  • FIG. 2 illustrates a detail in the structure of FIG. I but with the valve member in a different (sealing) position;
  • FIG. 3 is a horizontal sectional view as seen in the direction of arrows from the line III-III of FIG. 1;
  • FIG. 4 is a diagram of the negative hydrosistor shown in FIGS. 1 to 3;
  • FIG. 5 is a substantially central vertical sectional view-of a second negative hydrosistor which constitutes a modification of the hydrosistor shown in FIGS. 1 to 3;
  • FIG. 6 is a horizontal sectional view taken in the direction of arrows as seen from the line VI--VI of FIG. 5;
  • FIG. 7 is a fragmentary substantially central vertical sectional view of a third negative hydrosistor which constitutes a slight modification of the hydrosistor shown in FIGS. 5 and 6;
  • FIG. 8 is, a fragmentary horizontal sectional view of the hydrosistor shown in FIG. 7;
  • FIG. 9 is a substantially central vertical sectional view of a composite hydrosistor which embodies the hydrosistors of FIGS. I-3 and 5-6 and is connected with a single control line;
  • FIG. 10 is a diagram of the composite hydrosistor shown in FIG. 9;
  • FIG. 11 is a substantially central vertical sectional view of a hydrosistor which can be utilized as an AND- gate;
  • FIG. 12 is a diagram of the AND-gate shown in FIG. 1 1;
  • FIG. 13 is a substantially central vertical sectional view of a hydrosistor which can be used as an OR-gate;
  • FIG. 14 is a diagram of the OR-gate shown in FIG. 13;
  • FIG. 15 is a substantially central vertical sectional view of a hydrosistor which can be utilized as an amplifier
  • FIG. 16 is a diagram of the amplifier shown in FIG. 15.
  • FIG. 17 is a substantially central vertical sectional view of a hydrosistor which is similar to the fluidic logic device shown in FIGS. 1-3 and is further provided with an electromagnetically operated valve which regulates the flow of the control fluid stream.
  • FIGS. 1 to 3 illustrate the details of a first fluidic logic device of the type known as a negative hydrosistor or n-hydrosistor.
  • the principle of operation of an nhydrosistor is illustrated in FIG. 4. Its housing is connected with a control line or conduit X for a stream of control fluid, a supply line or conduit P for a power stream of fluid and a discharge line or conduit Y for the power stream.
  • the medium which is admitted by way of the line P and whose flow is controlled by the nhydrosistor may be a liquid or a gaseous fluid. If the fluid pressure in the control line X rises, the pressure in the discharge line Y disappears.
  • the discharge line Y contains fluid under pressure because the discharge line then receives fluid from the supply line P; if the fluid pressure in the control line X thereupon rises, the pressure of fluid in the discharge line Y disappears again because the latter is cut off or separated from the supply line P.
  • the n-hydrosistor therein shown comprises a housing which includes a first portion or base 1, a second portion or cover 3 and a third portion or side wall 33.
  • the base 1 has a substantially centrally located recess or blind bore 2 including alarger-diameter section nearer to its open or outer end and a smaller-diameter section nearer to its closed or inner end.
  • the cover 3 is secured to the base 1 by screws 4 or analogous fasteners and comprises a substantially centrally located projection or stem 5 which includes a larger-diameter portion received with small clearance in the larger-diameter section of the bore 2 and a smaller-diameter portion which extends with clearance into and defines a ring-shaped chamber or space 8 with the cylindrical internal surface surrounding the smaller-diameter section of the bore 2.
  • the larger-diameter portion of the stem 5 has a circumferential groove 6 for a sealing element in the form of an O-ring 7 which engages the adjacent portion of the internal surface of the base 1 and seals the ring-shaped chamber 8 from the open end of the bore 2.
  • the chamber 8 receives a slotted radially expandible and contractible elastic annular valve member or shuttle 9 which resembles a split ring and may consist of a metallic or synthetic plastic material.
  • the term annular is intended to embrace truly circular shapes as well as oval and like shapes which deviate from a truly circular form.
  • the outer-diameter of the shuttle 9 (which is inserted in prestressed condition) is such that the external surface of the shuttle bears against the adjacent portion of the surface surrounding the chamber 8.
  • the shuttle 9 is received in the chamber 8 with some freedom of axial movement.
  • 1 to 3 further comprises a device for holding the shuttle 9 against rotation in the chamber 8; such device comprises a pin or stud 10 which is mounted in the stem 5 (see FIG. 3) and extends radially outwardly through the axially parallel slot 9a of the shuttle and into an axially parallel recess 11 of the base 1.
  • the width of the chamber 8, as considered in the radial direction of the stem 5, is about one-andhalf to three times the wall thickness of the shuttle 9.
  • the smaller-diameter portion of the stem 5 is provided with two arcuate peripheral grooves or channels 12, 13 of finite length; these grooves or channels are interrupted in the region of the pin 10.
  • the channels 12, 13 are flanked by ribs 14, 16 and are separated from each other by a median rib the latter may but need not establish a complete seal between the two channels when the internal surface of the shuttle 9 bears against the ribs 14 and 16.
  • the stem 5 is further provided with at least one transverse (diametrically extending) bore 17 whose ends communicate with the channel 13 and at least one transverse (diametrically extening) bore 18 whose ends communicate with the channel 12.
  • the median portions of the bores 17, 18 communicate with an axially extending blind bore 19 which is in communication with a tapped socket or input port 20 for a threaded nipple (not shown) which is connected to one end of the control line X.
  • the port 20, the channels 12, 13 and the bores 17, 18, 19 form -a passageway or passage which connects the control line X with the chamber 8 at the inner side of the shuttle 9, i.e., in the region of the ribs 'or seats 14-16.
  • That portion of the internal surface of the base 1 which surrounds with clearance the channels 12, 13 of the stem 5 is provided with arcuate grooves or channels 22, 23, 24 of finite length. Each of these channels is interrupted in the region of the pin 10, the same as the channels 12 and 13.
  • the free ends of the annular shuttle 9 in the region of the slot 90 overlie the respective ends of the channels l2, l3 and channels 22, 23, 24 to an extent which approximates the thickness of the ribs 14, 15 and 16.
  • the two outer channels 22, 23 are respectively flanked by arcuate webs or ribs 27, 28 and the channels 22, 24 and 23, 24 are respectively separated from each other by arcuate ribs or webs 25, 26 which are provided in the base 1.
  • the width of the median channel 24 approximates or equals twice the width of the channel 22 or 23 (as considered in the axial direction of the stem 5), and this median channel 24 communicates with a bore 31 which is machined into the base 1 and communicates with a tapped output port 35 provided in the aforementioned side wall 33 of the housing.
  • the channel 24 constitutes with the port 35 and bore 31 a passage which connects the chamber 8 with the discharge line Y at the outer side of the shuttle 9, i.e., in the region of the ribs or seats 25-28.
  • the channels 22 and 23 communicate with two bores 32 (one shown in FIG. 3) which are machined into the base 1 and communicate with a tapped input port 34 of the side wall 33.
  • the input port 34 can receive a threaded nipple (not shown) at one end of the supply line P and the output port 35 receives a similar nipple at one end of the discharge line Y.
  • the channels 22, 23 constitute with the port 34 and bores 32 a passage which connects the line P with the chamber 8 at the outer side of the shuttle 9, i.e., in the region of the ribs or seats 25-28.
  • the height of the bore 31 (as considered in the axial direction of the stem 5) equals or approximates the height of the channel 24, and the height of each of the two bores 32 equals or approximates the height of the respective channel 22 or 23.
  • the cross-sectional area of the bore 31 equals or approximates the cross-sectional area of the discharge line Y, and the combined cross-sectional area of the bores 32 equals or approximates the cross-sectional area of the supply line P.
  • each of the channels 22, 23 increases preferably steadily in a direction from the pin 10 toward the respective bore 32, and the depth of the channel 24 increases preferably steadily in adirection from the pin 10 toward the bore 31. This is clearly shown for the channel 22 in FIG. 3 of the drawing.
  • valve member or shuttle 9 When the pressure of control fluid in the line X and the pressure of the power stream of fluid in the supply line P is zero, the valve member or shuttle 9 bears (due to its own elasticity) against the ribs or seats 25-28 of the base 1 whereby such ribs act as abutm'ents for the shuttle. This is shown in FIG. 1.
  • the pressure of a hydraulic or pneumatic fluid in the supply line P can also be used to regulate the sealing action of the shuttle 9. Thus, if the fluid pressure in the supply line P rises to equal that in the control line X,
  • the fluid pressure in the control line X decreases below the fluid pressure in the supply line P to such an extent that the fluid pressure in the channels 22, 23 can effect a deformation and resulting movement of the shuttle 9 away from the concave surfaces of the ribs 25-28 and toward the convex surfaces of the ribs 14-16, the supply line P is free to communicate with the-discharge line Y by way of the input port 34, bores 32, channels 22, 23, chamber 8 at the outer side of the shuttle 9, channel 24, bore 31 and output port 35. Such communication takes place when the fluid pressure in the channels 22, 23 overcomes the fluid pressure in the channels 12, 13 as well as the innate tendencyof the shuttle 9 to expand into sealing engagement with the ribs 25-28.
  • the force which the shuttle 9 produces due to its innate elasticity is relatively small so that, for all practical. purposes, the supply line P begins to communicate with the discharge line Y as soon as the fluid pressure in the channels 22, 23 overcomes the fluid pressure in the channels 12, 13.
  • the deformation of shuttle 9 in a direction to allow communication between the lines P and Y is accelerated as soon as the external surface of the shuttle moves away from the concave surfaces of the ribs 2528 because the pressure in the channel 24 rises practically instantaneously so that the fluid pressure is felt by a larger portion of the external surface of the shuttle, namely, by the entire external surface.
  • the fluid pressure against the external surface of the shuttle 9 is somewhat less than the initial pressure of fluid in the channels 22, 23 (prior to movement of the shuttle from sealing engagement with the ribs 25-28). However, and since the shuttle 9 is received in the chamber 8 with minimal axial play,
  • the fluid pressure in the control line X is increased whereby the shuttle is subjected to fluid pressure in the channels 12, 13 and undergoes a change in shape due to its elasticity and also due to the action of forces resulting from the fluid flow.
  • the latter action is due to the fact that the speed of fluid flow across the ribs 25, 26 between the channel 24 and the channels 22, 23 is greater than in the channels 22-24 so that the pressure at the concave surfaces of the ribs 25, 26 is lower.
  • the pressure in channels 22-24 is lower than in the channels 12, 13 which branch off upstream of the fluid admitting passages.
  • the differential force can also be increased by resorting to a suitable throttle or flow restrictor, e.g., a constriction in the supply line P downstream of the point where the control line X branches off. Even a very slight throttling action upon the flowing fluid will suffice.
  • a suitable throttle or flow restrictor e.g., a constriction in the supply line P downstream of the point where the control line X branches off. Even a very slight throttling action upon the flowing fluid will suffice.
  • deformable slotted valve member or shuttle 9 requires a minimum of deformation or radial contractionin the chamber 8 to establish a large path for the flow of substantial quantities of power fluid between the lines P and Y, not only in the chamber 8 proper but also in the fluid supplying and fluid discharging passages which connect the,chamber 8 with the lines P and Y.
  • the seats furnished by the ribs 14-16 and 25-28 are preferably of cylindrical shape to further enhance the sealing action of the shuttle 9 in each of its two sealing positions, i.e., when the shuttle seals the chamber 8 from the channels 12-13 and when the shuttle seals the chamber 8 from the channels 22-24 while simultaneously separating the channel 24 from the channels 22,
  • valve member is an annular body, its mass per unit length (as considered in the circumferential direction of the stem is very small, and the mass can be reduced still further by reducing the thickness of the shuttle.
  • Such reduction in thickness of the shuttle is preferably accompanied by an increase in the number of ribs or analogous seats in a manner to be described in connection with FIGS. 7 and 8.
  • the relatively small mass and relatively short strokes of the shuttle between its sealing positions of engagement with the ribs 14-16 or 25-28 render it possible to rapidly change the position of the shuttle in response to the application of relatively low control fluid pressures and to allow for frequent changes in the position of the shuttle with negligible wear. Since the extent of deformation of the shuttle 9 is relatively small, the magnitude of bending and other stresses during deformation of the shuttle is minimal and the wear on the housing surfaces which surround and are surrounded by the chamber 8 is negligible. Sincethe shuttle is elastic, it can readily compensate for manufacturing tolerances so that the seats furnished by the ribs 14-16 and 25-28 need not be machined or otherwise formed with a high degree of precision.
  • shuttle 9 is subject to automatic adjustment in its normal position as a result of progressing wear on the shuttle proper aswell as a result of wear on the seats furnished by the 'ribs' 14-16 and 25-28.
  • the deformability of shuttle 9 further reduces the likelihood of faulty operation in response to penetration of solid particles or other foreign matter which might be entrained by the control fluid stream and/or by the stream ofpower fluid.
  • the fluidic logic device of the present invention can be utilized as an output amplifier or as a control element (such as an OR-, NO- or AND- gate) whereby the intended purpose of the device depends .to a certain extent on its size.
  • An amplifier type hydrosistor will be described in connection with FIG. 15, and hydrosistors which can be used as AND- gates and OR- gates will be respectively described in connection with FIGS. 11 and 13.
  • the discharge line Y communicates with a tapped output port 46 in the cover 103 and the base 101 of the housing has two tapped input ports 43, 53 which respectively communicate with the control line X and supply line P.
  • the grooves or channels 112, 113 are machined into or otherwise formed in the cylindrical surface surrounding the recess 102 of the base 101 and communicate with the input port 43 by means of two bores 41, 42.
  • the channels 122, 123, 124 are machined into or otherwise formed in the cylindrical peripheral surface of the stem 105 which extends into the recess 102 and defines with the base 101 a ring-shaped chamber 108 for a slotted elastic annular valve member or shuttle 109.
  • the latter is held against rotation by a radial pin 110 of the stem 105 and is inserted under an initial stress in such a way that it tends to. bear against the convex surfaces of the webs or ribs 125, 126, 127, 128 on the stem 105.
  • the ribs 114, 115,116 alternate with the channels 112,113 and are provided in the base 101.
  • the passage which includes the medium channel 124 (which is wider than the channels 122, 123) and the port 46 and serves to connect the chamber 108 with the line Y further includes a transverse bore 44 and an axial bore 45, both provided in the stem 105 of the cover 103.
  • the passage between the chamber 108 and the line P includes the channels 122, 123, the input port 53, radial bores 48,
  • the bores 50 connect the bores 48, 49 with the groove 51.
  • the passage which connects the control line X with the chamber 108 includes the port'43, the bores 41, 42 and the channels 112, 113.
  • the reference character 104 denotes one of the screws which connect the cover 103 with the base 101.
  • the mode of operation of the hydrosistor of FIGS. 5-6 is analogous to that of the hydrosistor shown in FIGS. 1-3.
  • the main difference is that the initial stressing of the shuttle 109 is such that it tends to bear against the ribs 125-128 of the stem 10s, i.e., that the shuttle 109 tends to contract.
  • the heretofor described hydrosistors are designed for operation at relatively low fluid pressures, for example, up to l0 atmospheres superatmospheric pressure.
  • fluid pressures for example, up to l0 atmospheres superatmospheric pressure.
  • elevated pressures for example, in the range of up to and in excess of 100 atmospheres superat-v mospheric pressure, it is necessary to provide a larger number of ribs and/or webs to properly prop the deformable shuttle at the side which is opposite to the side acted upon by fluid pressure.
  • FIGS. 7 and 8 This hydrosistor is generally similar to the device of FIGS. 5-6.
  • the base 201 is formed with six channels 55 which communicate with the input port 243 for the control line X, and such channelsare flanked and separated from each other by seven arcuate ribs or seats 56.
  • the stem 205 of the cover 203 has six channels including two median channels 58 which communicate with the output port 246 for the discharge line Y and two pairs of outer channels 57 which communicate with the input port 253 for the supply line P.
  • the ribs 59 flank and separate the channels 57, 58 from each other.
  • the chamber 208 between the base 201 and stem 205 accommodates an arcuate insert 54 which is secured to the stem 205 by a radial pin 210.
  • the insert 54 is received in the slot 209a of the shuttle 209 and holds the latter against rotation in the chamber 208.
  • the two end faces of the insert 54 abut against the adjacent surfaces at the respective axial ends of the chamber 208 and this insert is installed between those portions of the surfaces on the base 201 and stem 205 which are free of channels.
  • the length of the insert 54 is such that there remains a negligible clearance between the axially parallel end surfaces of the shuttle 209 (namely, the surfaces which flank the slot 209a of the shuttle) and the adjacent surfaces 54a, 54b of the insert.
  • the surfaces 54a, 54b of the insert 54 are parallel with the respective end surfaces of the shuttle 209. If desired, the surfaces 54a, 54b may be of concave shape so as to be more accurately tracked by the end surfaces of the shuttle 209 when the latter undergoes deformation in response to the application of fluid pressure or as a result of its own resiliency.
  • FIG. 9 illustrates a twin or composite hydrosistor which is a combination of the devices shown in FIGS. 1-3 and 5-6.
  • This composite hydrosistor is connected with a single control line X (see FIG. and with two discrete supply lines P1, P2 and two discrete discharge lines Y1, Y2.
  • the housing of the hydrosistor of FIG. 9 defines two ring-shaped chambers 60, 61 which respectively receive slotted annular'elastic valve members or shuttles 62, 63.
  • the control line X is in communication with channels64, 65 which are machined into or otherwise formed in an intermediate housing portion 66.
  • the base 301 has an input port which communicates with the pressure line P1 and with channels 322, 323 provided in the cylindrical surface surrounding the outer chamber 61, and an output port which communicates with the discharge line Y1 and with a further channel 324 provided in the surface surrounding the outer chamber 61.
  • the channels 64 are provided at the inner side of the shuttle 63.
  • the cover 303 has a stem 305 which is provided with an input port for the supply line P2 and an output port for the discharge line Y2.
  • the supply line P2 communicates with channels 322', 323' and the discharge line Y2 communicates with a channel324 of the stem 305.
  • the channels 65 are provided in the intermediate housing portion 66 at the outer side of the shuttle 62.
  • a change of fluid pressure in the control line X can establish or terminate communication between the lines P1, Y1 and P2, Y2 (see FIG. 10).
  • the housing portions 301, 66 cooperate substantially as the housing portions 1, 3 of FIGS. l-3 and the housing'portions 66, 303 cooperates substantially as the housing portions 101, 103 of FIGS. 56.'
  • FIG. 11 illustrates a composite hydrosistor which is a combination of the devices shown in FIGS. 1-3 and 56 and acts as an AND-gate.
  • the diagram of this hydrosistor is shown in FIG. 12.
  • the hydrosistor is connected with two control lines X1, X2, a single supply line P and a single discharge line Y.
  • the fluid discharging channel 70 of the outer hydrosistor is connected with the supply channels 71 of the inner hydrosistor.
  • the control line X2 communicates with the channels 412, 413 at the inner side of the shuttle 309 in the outer hydrosistor and the control line X1 communicates with the channels 412', 413' at the outer side of the shuttle 309' in the inner hydrosistor.
  • the discharge line Y communicates with the aforementioned channels 71 of the inner hydrosistor and with the channel 70 of the outer hydrosistor.
  • FIGS. 13 and 14 constitutes an OR-gate. As indicated schematically in FIG. 14, this structure also comprises two hydrosistors and is connected with two control lines X1, X2, a supply line P and a discharge line Y.
  • the supply line P communicates with the channels 74 of the inner hydrosistor and with the channels 75 of the outer hydrosistor.
  • the discharge line Y communicates with the median channel 76 of the outer hydrosistor and the median channel 77 of the inner hydrosistor.
  • the control line X1 communicates with the channels 512, 513 at the inner side of the shuttle 509 in the outer hydrosistor, and the control line X2 communicates with the channels 512', 513' at the outer side of the shuttle 509' in the inner hydrosistor.
  • the heretofore described devices constitute discrete n-hydrosistors or combinations of n-hydrosistors.
  • a positive hydrosistor (known as p-hydrosistor) is illustrated in FIG. 15, and its diagram is shown in FIG. 16.
  • the interior of the discharge line Y for a p-hydrosistor is respectively without pressure and under pressure simultaneously with the control line X.
  • the p-hydrosistor of FIG. 13 is also a combination of two n-hydrosistor's including a first n-hydrosistor (shown in the left-hand part of FIG.
  • the discharge channel 80 of the smaller n-hydrosistor is in communication with the four control channels 81 of the large n-hydrosistor.
  • the supply channels 82, 83 of both n-hydrosistors are connected with a common supply line P. In order to allow for a drop of pressure in the discharge channel 80 of the smaller n-hydrosistor when the control channels 84 of the smaller n-hydrosistor.
  • the channel 80 is in communication with a return conduit or line 0 by way of a bore 85, a compartment 86 and a flow restrictor 87 in a bore 88.
  • the control line X is connected with the smaller n-hydrosistor; when the fluid pressure in the line X rises, the discharge channel 80 is sealed from the supply channels 83 by the shuttle 609 of the smaller nhydrosistor. This causes a drop of pressure in the bore because the latter is connected with the bore 88 and return line 0 by the flow restrictor 87.
  • the pressure in the control channels 81 of the larger n-hydrosistor also decreases. Due to fluid pressure in the supply line P, which is effective in the channels 82, the shuttle 609 of the larger n-hydrosistor is biased against the ribs which flank the channels 81 to thus establish communication between the lines P and Y.
  • the shuttle 609' of the smaller n-hydrosistor is biased against the ribs which flank the channels 84, this being due to fluid the supply line P. This insures that the interior of each control channel 81 in the larger n-hydrosistor is maintained under pressure.
  • the shuttle 609 is deformed by undergoing expansion and thereby seals the discharge line Y from the supply line 1.
  • the device of FIG. 15 acts as an amplifier.
  • the stem 705 of the cover 703 can accommodate an electromagnetic valve 90.
  • the valve 90 in order to reduce the switching time and to thus allow for high-frequency operation of the hydrosistor, the valve 90 is preferably placed as close to the shuttle 709 as possible. This reduces the length of the passageway between the valve and the chamber 708 with attendant reduction of the mass and inertia of fluid which is confined in such passageway.
  • the movable parts of the valve 90 are preferably designed to perform very short strokes and are preferably of compact and lightweight construction.
  • the cross-sectional area of the path for the fluid flow through the valve 90 can remain small because the volume of fluid which flows in the control line X in order to change the position of the shuttle 709 is relatively small.
  • the end face of the stem 705 of the cover 703 shown in FIG. 17 is provided with a blind bore or recess which receives the body 91 of the valve 90.
  • the axial bore 719 of the stem 705 communicates with the control line X and registers with a bore 92 in the valve body 91.
  • the bore 92 communicates with a compartment 93 in the valve body 91 and this compartment receives a spherical valve element 94 which is movablein the compartment 93 at right angles to the axis of the bore 719.
  • the control channels 712, 713 communicate with the compartment 93 by way ofa bore 95, and the compartment 93 further communicates with two relief bores 97, 98 by way of a bore 96.
  • The'bores 97, 98 are connected with the return line 0.
  • the body 91 defines a valve seat which can be'engaged by the valve element 94 and surrounds that portion of the bore 96 which communicates with the compartment 93.
  • the valve element 94 is connected with or forms part of an armature 100 of an electromagnet 100a which latter further includes a spring 99 serving to bias the armature 100 upwardly so that the valve element 94 seals the compartment 93 from the bore 92 when the ,electromagnet 100 a is deenergized.
  • the space which accommodates the spring 99 is in permanent communication with the bore 92 by way of a bore 89 in the valve body 91 to insure an equalization of pressures.
  • the valve element 94 seals the control line X from the compartment 93 under the action of the spring 99.
  • the pressure in the control channels I 712, 713 is zero and the shuttle 709 abuts against the ribs 714, 715, 716. Therefore, the channel 724 communicates with the channels 722, 723 to connect the supply line (not shown) with the discharge line (not shown).
  • Thefluid pressure in the control line X is propagated via bore 719 and causes a rise of fluid pressure in the channels 712, 713 which expands the shuttle 709 so that the latter seals the channel 724 from the channels 722, 723 and thus interrupts the flow of fluid between the supply and discharge lines.
  • a hydraulically or pneumatically operated fluidic .logic device comprising a housing having at least one ring-shaped chamber and a plurality of passages communicating with said chamber, said passages including a fluid-supplying first passage, a fluid-discharging second passage and a third passage for admission of a control fluid at a variable pressure; and a slotted elastically deformable annular valve member received in said chamber with freedom of radial movement and being movable in response to pressure changes in said third passage into and from a sealing position in which said member separates said first and second passages from each other.
  • valve 'member received in said chamber with minimal clearance, as considered in the axial direction of said chamber.
  • said channel means are of finite length and said housing comprises rib means extending between said channel means of said first and second passages, said rib means constituting seat means for said valve member in said sealing position thereof.
  • said channel means of said first passage includes a plurality of channels which flank the channel means of said second and said housing comprising a ring-shaped portion.
  • said third passage being provided in said ring-shaped portion and communicating with both said chambers and further comprising a second elastically deformable slotted annular valve member in said second chamber.
  • said means for holding comprises an insert fixedly received in said chamber in the slot of said valve member.
  • valve member has a 'pair of end surfaces flanking said slot and said insert has a pair of complementary surfaces each closely adjacent to a different one of said end surfaces.
  • a device as defined in claim 1 wherein said housing has a first substantially cylindrical surface surrounding said chamber and a second substantially cylindrical surface surrounded by said chamber, said first and second passages respectively having first and second channel means provided in one of said surfaces and said third passage comprising channel means provided in the other of said surfaces, at least one of said channel means having a plurality of arcuate channels and the respective passage further comprising means connecting said plurality of channels with each other.
  • valve means actuatable to respectively connect and seal said third passage from a source of pressurized control fluid.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Multiple-Way Valves (AREA)
  • Fluid-Driven Valves (AREA)
US00187431A 1970-10-09 1971-10-07 Fluidic logic device Expired - Lifetime US3716071A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702049612 DE2049612A1 (de) 1970-10-09 1970-10-09 Schaltelement für hydraulische oder pneumatische Steuerungssysteme

Publications (1)

Publication Number Publication Date
US3716071A true US3716071A (en) 1973-02-13

Family

ID=5784615

Family Applications (1)

Application Number Title Priority Date Filing Date
US00187431A Expired - Lifetime US3716071A (en) 1970-10-09 1971-10-07 Fluidic logic device

Country Status (7)

Country Link
US (1) US3716071A (it)
JP (1) JPS478565A (it)
CH (1) CH530565A (it)
DE (1) DE2049612A1 (it)
FR (1) FR2110330B1 (it)
GB (1) GB1329957A (it)
IT (1) IT938973B (it)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4683907A (en) * 1986-03-24 1987-08-04 Francesco Amici Valve for the interception and regulation of flow with a fixed tubular sealing element
WO2001038765A1 (en) * 1999-11-22 2001-05-31 Pbt (Ip) Limited Piezo ceramic bender and valve incorporating same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59103239A (ja) * 1982-11-12 1984-06-14 株式会社　コンポン 圧力スイツチ装置
DE3608621A1 (de) * 1986-03-14 1987-09-17 Siemens Ag Ventil, insbesondere in dosierkartuschen fuer fluessigkeitszerstaeuber

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3057594A (en) * 1957-07-11 1962-10-09 Foxboro Co Fluid flow pressure switch device
US3176714A (en) * 1961-04-11 1965-04-06 Burroughs Corp Valve assembly

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3057594A (en) * 1957-07-11 1962-10-09 Foxboro Co Fluid flow pressure switch device
US3176714A (en) * 1961-04-11 1965-04-06 Burroughs Corp Valve assembly

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4683907A (en) * 1986-03-24 1987-08-04 Francesco Amici Valve for the interception and regulation of flow with a fixed tubular sealing element
WO2001038765A1 (en) * 1999-11-22 2001-05-31 Pbt (Ip) Limited Piezo ceramic bender and valve incorporating same

Also Published As

Publication number Publication date
FR2110330B1 (it) 1974-06-07
CH530565A (de) 1972-11-15
DE2049612A1 (de) 1972-04-13
IT938973B (it) 1973-02-10
FR2110330A1 (it) 1972-06-02
JPS478565A (en) 1972-05-06
GB1329957A (en) 1973-09-12

Similar Documents

Publication Publication Date Title
US3608587A (en) Single spindle four-way valve
US3646969A (en) Valve mechanism
US3228652A (en) Valve having downstream fluid pressure seal
US3521855A (en) Ball valve seat-seal
US5401087A (en) Pressure control valve
US3218024A (en) Fluid motor actuated ball valve
US3878859A (en) Electromagnetic valve
EP0157847B1 (en) Slide valve
GB1502502A (en) Pneumatic logic circuits and their integrated circuits
US3955597A (en) Poppet type change-over valve assembly
US3825026A (en) Inline valve
US3415284A (en) Flap valve
GB1271268A (en) Restricted bypass flow check valve
US3444897A (en) Reversible flow control device
US3412756A (en) Poppet valve having oppositely directed spherical seating surfaces
US4277047A (en) Metallic sealing device for valve
US5556075A (en) High pressure valve
GB2129098A (en) Pressure regulating valve
US3716071A (en) Fluidic logic device
US3561483A (en) Dual fluid mixing valve with servomotor
GB1006992A (en) Improvements relating to a fluid-controlled bistable device
US3583430A (en) Annular flexible valve
CN110030219B (zh) 先导换向阀和包括所述先导换向阀的阀系统
US3825225A (en) Manifold arrangement and parts therefor or the like
GB1281657A (en) Fluid-pressure-responsive logical elements