US2255359A - Compressor - Google Patents

Compressor Download PDF

Info

Publication number
US2255359A
US2255359A US214974A US21497438A US2255359A US 2255359 A US2255359 A US 2255359A US 214974 A US214974 A US 214974A US 21497438 A US21497438 A US 21497438A US 2255359 A US2255359 A US 2255359A
Authority
US
United States
Prior art keywords
piston
cylinder
compensating
pressure cylinder
low pressure
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
US214974A
Other languages
English (en)
Inventor
Lepersonne Octave
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US2255359A publication Critical patent/US2255359A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
    • B60T11/16—Master control, e.g. master cylinders
    • B60T11/224—Master control, e.g. master cylinders with pressure-varying means, e.g. with two stage operation provided by use of different piston diameters including continuous variation from one diameter to another
    • 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
    • F04B25/00—Multi-stage pumps
    • F04B25/02—Multi-stage pumps of stepped piston type
    • 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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
    • F04B39/0016—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons with valve arranged in the piston
    • 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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
    • F04B39/0022—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons piston rods
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/16—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by adjusting the capacity of dead spaces of working chambers
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/18—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the effective cross-section of the working surface of the piston

Definitions

  • the present invention relates to compressors for brakes and hydraulic transmissions of the compound type comprising two pistons of different diameters of which one, the low pressure piston, serves to, displace a comparatively large volume of liquid for a given travel and the other high pressure piston serves to displace a comparatively small volume of liquid and to create a high pressure.
  • the back pressure in the low pressure cylinder is controlled by a member with spring return having a small surface subjected to the high pressure and a large surface subjected to the low pressure, and the ratio between these sections is less than the ratio of the sections of the high pressure and low pressure pistons in such manner as to graduallyreduce the said back pressure as the high pressure rises.
  • the invention has for its object a compressor of this type characterised by the low pressure cylinder communicating with a variable space, the variations in volume of which are controlled by a compensating piston operated by the actuating member which controls the back pressure in the high pressure cylinder, which obviates any possibility of inaccurate communication between the cylinders and the liquid reservoir and, owing to the action of the highpressure and low pressure on this compensating piston, permits of obviating any jerky transmission and of efiecting a perfect state of progress.
  • the compensating piston after having travelled over a distance such that the back pressure in the low pressure-cylinder has- fallen below a certain limit, is'subjected to an additional external pressure, for example that of a spring, causing a fresh back pressure in the low pressure cylinder and still'further improving the degree of progress of the transmission.
  • the compensating piston co-operates with a stop restricting its displacement so as to produce at the end of the clamping stroke serving in case of extreme braking, a considerable increase in the back pressure and to thus limit the high pressure developed by the compressor whatever may be the effort applied at this moment to the piston.
  • variable section piston may move by an amount determined with respect to the thrust under the action of a return spring bearing on this thrust and the tension of which is greater than that of the spring bringing the graduated piston back to the rear, this displacement having as a result to block the port placing the low pressure cylinder in communication with the reservoir and to keep at rest a positiveresidual pressure in the interior of the pipes and receivers.
  • Figure 1 is a longitudinal section on the axis of the compressor according to the invention
  • Figure 2 is a partial section similar to that of Figure 1 and illustrating another method of carrying out the invention
  • Figures 3 and 4 indicate diagrammatically two different phases of the movement of the parts.
  • the compressor according to theinvention is composed of a body I comprising two co-axial sections having bores 2 and the smaller one 3 of which is screwed at 4 in the interior of the larger one.
  • a packing 5 prevents leakage between the sections and the smaller section is terminated by a socket 6 for connection to piping and thus to receivers.
  • This body I also comprises a socket l which may be connected to a reservoir containing the liquid and which may be placed in communication by an aperture 8 with the bore 2.
  • a stepped piston 9, ill In the interior of the two bores 2 and 3, slides a stepped piston 9, ill, the portion ID of which of smaller diameter or the high pressure piston slides in the interior of the bore 3 of high pressure cylinder and is pi'ovided with a tight packing ring l2 and the part 9 of which of greater diameter or the low pressure piston slides in the interior of the bore 2 or low pressure cylinder and is providedwith a packing II closing the aperture 8 when the piston is at rest.
  • the stepped piston 9, I 0 is urged towards the rear by a spring l3 bearing on the bottom of the low pressure cylinder 2, and it is driven forward by a block I4 on which is screwed at l5 a sleeve l5 sliding in the bore 2, provided with a packing joint H.
  • the movement of the sleeve towards the rear is limited by a series of stops I8 fixed to the body' I.
  • the sleeve l6 comprises an extension l9 adapted to come into contact by its circular flange 20 with a rear extension 2
  • the stop 23 acts upon forced in the direction of the lower part of the socket 56 by a spring the rear of the recess 24 to hold the pistons 9 and 19 in their respective positions under the influence of spring 32 when the device is at rest.
  • This bore 22 communicates by apertures 29 with an annular chamber 36 surrounding the rear extension 2! of the low pressure piston 9, which may itself be connected to the socket 1 and the liquid reservoir by the port 3
  • the compensating piston 26 is constantly the receiving devices to its idle position by a spring 32 bearing on the block l4 and of which the tension is greater than that of the spring l3, and the piston 26 is provided with a cavity 33 into which penetrates an extension 34 of the driver 14 around which is arranged a spring 35, bearing on the block l4 and adapted when the compensating piston'26 recedes, to contact with the edges of the cavity 33.
  • a hollow rod 31 constituting the .control member.
  • This hollow rod 31 slides in a bore 38 made in the high pressure piston In, it is closed at it's extremity 39 and it is provided with ports 40 uncovered when the piston 26 is at the end of its stroke, but adapted to be closed when the.
  • piston 26 recedes with respect to the high pressure piston [0, either by the surfaces of the bore of the high pressure piston or by an annular packing piece 4! fixed in a groove 32 made at the extremity of the high pressure piston 16 and independent of the packing l2 of this piston H].
  • the hollow rod 31 communicates with the low pressure cylinder 2 by the conduits 43, the conduits 44 and 45 made in the piston 26 and the conduits .46 made in the surfaces or the bore 25.
  • the low pressure cylinder is provided with a socket 50' connected by the conduit to the socket 1.
  • a valve 53 with spring 54 adapted to place the socket 56 in communication with the low pressure cylinder 2 through the conduit 55.
  • the seat 56 of the valve 53 forms a poppet valve and is appliedstrongly against 51 bearing on the bottom of the threaded plug 52, which permits by unscrewing this plug 52 of diminishing or removing the tension of the said spring 51.
  • This compressor operates in four phases: In the course of the first phase the block I4 is acted upon in the direction of arrow 1, the flange 20 of the socket l6 comes into contact with the rear extension 2i of the stepped piston 9, i6 and the assembly of the block l4, socket i6, stepped piston 9, l0 and compensator piston 26 thrust by the spring 32, moves in the direction of the arrow f.
  • the port 8 placing the low pressure cylinder in communication with the reservoir is blocked, whilst the ports 46 are open, placing the low pressure cylinder through the conduits 46, 45, 44 and 43 in communication with the high pressure cylinder.
  • the compensating piston 26 On the return and as soon as the effort exerted on the block I4 is suppressed, the stepped piston 9, I is brought to its position of rest under the combined action of the spring l3 and of the pressure of the liquid delivered by the receivers, the compensating piston 26 also returns to its position of rest by the action of springs 32 and 33, the liquid penetrates afresh through the port 3
  • the valve 53 may be omitted and the fresh supply with liquid of the low pressure cylinder may be effected by the deflection of the packing piece of the low pressure piston which is produced when a partial vacuum is created in this cylinder, which forces the liquid which is behind the piston in the chamber 30 to pass into this cylinder.
  • This described structure is not illustrated in the present drawings but is designed to disclose an alternative construction which may replace the valve construction corresponding to member 53.
  • the stepped piston 9, i0 compresses the spring 32 and the port 8 remains uncovered, permitting the liquid to return to the reservoir. But as soon as the pressure in the cylinders falls below a certain definite limit fixed by the difierence of tension of the springs 32 and I3, the spring 32 having a tension greater than that of-the spring ⁇ 3 becomes preponderant, the stepped piston 9, l0 moves afresh in the direction of the arrow 1 by an amount equal to or less than the play of the stop 23 in the interior of the recess 24 and until the port 8 is blocked afresh, which permits'of maintaining in the conduits and receivers, a definite positive residual pressure.
  • the liquid contained in the piping and receivers expands, it again compresses the spring 32, the port 8 is uncovered and the liquid escapes towards the reservoir until the residual pressure has fallen to the value chosen. If, on the contrary, the liquid tends to contract, the spring 32 causes the stepped piston 9, I 0 to advance slightly until the residual pressure attains the selected value.
  • valve 53 opens and permits the liquid from the reservoir to penetrate into the low pressure cylinder and to fill up this depression.
  • the compressor according to the invention permits of effecting the approach of the brake segments with a reduced movement of the motive pistons and it also permits of the progressive passage from the phase of low pressure to the phase pressure piston.
  • the device utilised to maintain the residual pressure permits when at rest of keeping filled with liquid under pressure not only the pipes and receivers but also the cylinders of the compressor owing to the communication efiected by the opening when at rest of the ports 40 so as to overcome the passive resistances of the movable system in the cylinders, and of ensuring an immediate start.
  • FIG. 2 is shown a modification of the compressor according to the invention.
  • the communication between the low pressure cylinder and the high pressure cylinder is effected by means of the port 60 made in the wall of the high pressure cylinder uncovered when at rest and which is blocked by the packing piece I2 as soon as the stepped piston 9, I 0 commences its movement in the direction of the arrow f and by means of a valve 6
  • the low pressure piston instead of being cut oil from the receivers at the same time as the compensating piston 25, only ceases to send liquid towards these receivers when the pressure in the low pressure cylinder has become sufliciently less than the pressure in the high pressure cylinder, to cause the closing of the valve GI and consequently the placing out of operation of the low pressure piston with respect to the receivers.
  • a compressor for fluid pressure comprising a high pressure cylinder, having means for communication with a receiving device, a high pres sure piston operable in said cylinder, a low pressure cylinder coaxial with the high pressure cylinder, a low pressure piston operating in the low pressure cylinder, the pistons being arranged integrally, said pistons having a compensating cylinder of smaller diameter extending within the low pressure piston, a compensating piston operative in the compensating cylinder, the end of the extension of the compensating piston terminating in the high pressure cylinder, springs acting on the compensating piston, means for simultaneously displacing the three pistons in their cylinders, said first piston having openings for establishing communication between the low pressure cylinder and the compensating cylinder and other openings for establishing communication between the compensating cylinder and the high pressure cylinder, means for closing these last named openings when the pressure in the high pressure cylinder reaches a predetermined value, a chamber of variable volume created by the displacement of the compensating piston and arranged at the rear of said piston, and having a communication
  • a compressor for fluid pressure comprising a high pressure cylinder, having means for communicating with a receiving device, a piston operative in the high pressure cylinder, a low pressure cylinder coaxially disposed with respect to'the high pressure cylinder, a piston in the low pressure cylinder, and integral with the first piston, said piston being coaxial, said second piston being bored to provide a compensating cylinder of smaller diameter, a compensating piston operative in the compensating cylinder, springs acting on the compensating piston, one end of the eX- tension of the compensating piston terminating in the high pressure cylinder, means for simultaneously disp aci g the three pistons in their cylinders, said first piston leaving openings between the low pressure cylinder and the compensating cylinder and other openings afiording communication between the compensating cylinder and the high pressurecylinder, means for closing these last named openings when the pressure in the high pressure cylinder reaches a predetermined value, said compressor having a chamber of variable volume created by the displacement of the compensating piston and arranged at the rear
  • a compressor for fluid pressure comprising a high pressure cylinder, having means for connection with a receiving, device, a piston operative in the high pressure cylinder, a low pressure cylinder, a piston operative in the low pressure cylinder, and integral with the first piston, the respective pistons and cylinders being coaxial, said second piston having a bore constituting a compensating cylinder, a compensating piston operative therein, springs acting on the compensating piston, the compensating piston terminating in the high pressure cylinder, means for simultaneously displacing the three pistons in their cylinders, said first piston having openings for the communication between the low pressure cylinder and the compensating cylinder and other openings for communication between the compensating cylinder and the high pressure cylinder, means for closing these last named openings when the pressure in the high pressure cylinder reaches a predetermined value, said compressor having a chamber of variable volume created by the displacement of the compensating piston, said chamber being arranged at the rear of said compensating piston, said compressor having communication between said chamber and the high pressure cylinder, means
  • a compressor for fluid pressure comprising a high pressure cylinder having means aifording communication from this cylinder to receiving devices, a piston operative in said high pressure cylinder, at low pressure cylinder, a piston operative in said low pressure cylinder, and integral with the first piston, said cylinders and pistons being coaxial, said second cylinder having a bore constituting a compensating cylinder of relatively smaller diameter, a compensating piston operative in the compensating cylinder, springs acting on the compensating piston, said compensating cylinder leaving an end terminating in the high pressure cylinder, means for simultaneously displacing the three pistons in their cylinders, said first piston having openings for communication between the low pressure cylinder and the compensating cylinder and other openings for communication between the compensating cylinder .and the high pressure cylinder, means for closing these last named openings when the pressure in the high pressure cylinder reaches a predetermined value, a chamber of variable volume created by the displacement of the compensating piston and arranged at the rear of said piston, said compressor having communication between this chamber
  • a compressor for fluid pressures comprising a high pressure cylinder, having means for communicating the high pressure cylinder to the receiving devices, a piston operative in the cylinder,-
  • a low pressure cylinder a piston operative in the low pressure cylinder, and integral with the first piston the respective pistons and cylinders being arranged coaxially, said first piston having a bore forming a compensating cylinder of relatively small diameter, a compensating piston operative in the compensating cylinder, springs acting on the compensating piston, the end of the extension of the compensating piston terminating in the high pressure cylinder, means for simultaneously displacing the three pistons in their cylinders, said first piston having communicating openings between the low pressure cylinder and the compensating cylinder and other communicating openings between the compensating cylinder and the high pressure cylinder, means for closing these last named openings when the pressure in the high pressure cylinder reaches a predetermined value, said means being controlled by the relative displacement of the compensating piston and of the low and high pressure pistons in order to close the communication between the high and low pressure cylinders.
  • a compressor for fluid pressures comprising a high pressure cylinder having means for communicating the high pressure cylinder to the receiving devices, a piston operative in the high pressure cylinder, a low pressure cylinder, a piston in the low pressure cylinder, integral with the first piston, the pistons and cylinders being arranged coaxially, said first piston having a bore forming a compensating cylinder, a compensating piston adapted to operate in said cylinder, springs acting on said compensating piston, the end of the extension of the compensating piston terminating in the high pressure cylinder, means for simultaneously displacing the three pistons in theircylinders, said first piston having openings forcommunication between the low pressure cylinder and the compensating cylinder and other openings for communication between the compensating cylinder and the high pressure cylinder, means for closing these last named openings when the pressure in the high pressure cylinder reaches a predetermined value, said compressor having a chambenof variable volume created by the displacement of the compensating piston and arranged at the rear of said piston, saidcompressor having com
  • a compensating piston operative therein, springs acting on said compensating piston, the end of the compensating piston terminating in the high pressure cylinder, means for simultaneously displacing the three pistons in their cylinders, said first piston having openings establishing communication between the low pressure cylinder and compensating cylinder and other openings establishing communication between the com- ,pensating cylinder and the high pressure cylinder, means for closing the last named openings when the pressure in the high pressure cylinder reaches a predetermined value, said compressor having a chamber of variable volume created by the displacement of the compensating piston and arranged at the rear of said piston, said compressor having communication between said 4 chamber and the low pressure cylinder, means compensating piston in a direction opposite to for gradually increasing the volume of the chamher when the pressure in the high pressure cylinder exceeds the said predetermined value, said compressor having means for admitting liquid from a reservoir to-thelow pressure cylinder, and means for closing the latter after a small displacement of the low pressure piston in its cylinder, when the compressor is at rest.
  • a compressor for fluid pressures comprising a high pressure cylinder arranged for communication with receiving devices, a piston operative in the high pressure cylinder, a low pressure cylinder, a piston in the low pressure cylinder, the pistons and cylinders being arranged integrally and having a bore forming a compensating cylinder, a compensating piston adapted to operate in said compensating cylinder, springs acting on said compensating piston, an extension on the compensating piston terminating in the high pressure cylinder, means for simultaneously displacing the three pistons in their cylinders, said first cylinder having openings for communication between the low pressure cylinder and the compensating cylinder and other openings for communication between the compensating cylinder and the high pressure cylinder, means for closing these last named openings when the pressure in the high pressure cylinder reaches a predetermined value, said compressor having a chamber of variable volume under displacement of the compensating piston and arranged at the rear of said piston, said compressor having communication between this chamber and the high pressure cylinder, means for closing this last communicationwhen the pressure in the high pressure
  • a construction according to claim 1, including a means for a communication between a liquid reservoir and the low pressure cylinder, a valve in said last means opening in a direction from the reservoir toward the low pressure cylinder, said valve having a seat capable of opening in the opposite direction under the action of the pressure in the low pressure cylinder, and a spring resisting movement of the valve seat.
  • a compressor for fluid pressure comprising a high pressure cylinder adapted for communication with receiving devices, a high pressure piston operable in said cylinder, 2. low pressure cylinder coaxial with the high pressure cylinder, 2. low pressure piston operating in the low pressure cylinder, the pistons being integral, said pistons having a compensating cylinder of smaller diameter, a hollow compensating piston operative in the compensating cylinder and extending within the low pressure piston, springs acting on the compensating piston, the compensating piston having an extension terminating in the high pressure cylinder, means for simultaneously displacing the three pistons in their cylinders, said pistons having openings for establishing communication between the low pressure cylinder and the compensating cylinder and other openings for establishing communication between the compensating cylinder and the high pressure cylinder, means for closing these last named openings when the pressure in the high pressure cylinder reaches a predetermined value, said means comprising a valve opening from the low pressure cylinder toward the high pressure cylinder against the resilient means of a spring, said valve being positioned internally of the extension of the compensating

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Transmission Of Braking Force In Braking Systems (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Braking Systems And Boosters (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
US214974A 1937-06-23 1938-06-21 Compressor Expired - Lifetime US2255359A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR703652X 1937-06-23

Publications (1)

Publication Number Publication Date
US2255359A true US2255359A (en) 1941-09-09

Family

ID=9062524

Family Applications (1)

Application Number Title Priority Date Filing Date
US214974A Expired - Lifetime US2255359A (en) 1937-06-23 1938-06-21 Compressor

Country Status (4)

Country Link
US (1) US2255359A (fr)
DE (1) DE703652C (fr)
FR (4) FR833592A (fr)
GB (1) GB516174A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2615304A (en) * 1949-11-29 1952-10-28 Martin V Groves Hydraulic master brake cylinder having bleeding means
US2637977A (en) * 1947-10-14 1953-05-12 Alfred B Seppmann Valve controlled brake fluid accumulator for master cylinders
US4076465A (en) * 1974-01-18 1978-02-28 Pauliukonis Richard S Volumetric proportioning diluter
FR2387827A1 (fr) * 1977-04-18 1978-11-17 Gen Motors Corp Maitre-cylindre a rattrapage rapide de course pour circuit de freinage
US6347518B1 (en) * 1997-02-07 2002-02-19 Kelsey-Hayes Company Pedal simulator using spring with non-linear response

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE753835C (de) * 1939-05-10 1952-10-13 Teves Kg Alfred Zweistufiger Fluessigkeitsdruckerzeuger
US3147042A (en) * 1962-02-05 1964-09-01 Kelsey Hayes Co Vehicle brake mechanism
US4924673A (en) * 1988-02-17 1990-05-15 Automotive Products Plc Master cylinder with parallel-bore reservoir

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2637977A (en) * 1947-10-14 1953-05-12 Alfred B Seppmann Valve controlled brake fluid accumulator for master cylinders
US2615304A (en) * 1949-11-29 1952-10-28 Martin V Groves Hydraulic master brake cylinder having bleeding means
US4076465A (en) * 1974-01-18 1978-02-28 Pauliukonis Richard S Volumetric proportioning diluter
FR2387827A1 (fr) * 1977-04-18 1978-11-17 Gen Motors Corp Maitre-cylindre a rattrapage rapide de course pour circuit de freinage
US4133178A (en) * 1977-04-18 1979-01-09 General Motors Corporation Quick take-up master cylinder
US6347518B1 (en) * 1997-02-07 2002-02-19 Kelsey-Hayes Company Pedal simulator using spring with non-linear response

Also Published As

Publication number Publication date
GB516174A (en) 1939-12-27
FR51151E (fr) 1941-09-30
FR833592A (fr) 1938-10-25
FR49540E (fr) 1939-05-01
FR51128E (fr) 1941-08-08
DE703652C (de) 1941-03-13

Similar Documents

Publication Publication Date Title
US2163982A (en) Fluid-operated jack
US2393524A (en) Control for fluid pressure power devices
US2532960A (en) Brake booster
US2648346A (en) Locking valve for hydraulic motors
US3796134A (en) Hydraulic booster brake mechanism
US2255359A (en) Compressor
US2293076A (en) Apparatus for increasing or reducing fluid pressure
US2339378A (en) Fluid pressure regulating device for fluid supply systems
US2847827A (en) Hydraulic compensating master cylinder
US2243385A (en) Hydraulic remote control device
SU660577A3 (ru) Гидравлическа система управлени коробкой передач транспортного средства
US2381930A (en) Fluid pressure compounding system
US2407957A (en) Compound hydraulic brake compressor and the like
US3140587A (en) Divided output compound master cylinder
GB1142506A (en) Improvements in or relating to air pressure actuators for gear change mechanisms
US2381989A (en) Hydraulic brake booster
US2474749A (en) Self-adjusting hydraulic brake mechanism
US2591793A (en) Device for adjusting the return travel of fluid actuated means
US2916882A (en) Hydraulic power brake booster
US2513486A (en) Power control valve
US2404932A (en) Brake booster
US2665552A (en) Load responsive pressure regulating valve
US2472547A (en) Servomotor mechanism
US2177097A (en) Power transmission
US2203082A (en) Fluid pressure mechanism