US2972867A - Pressure intensification device - Google Patents

Pressure intensification device Download PDF

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Publication number
US2972867A
US2972867A US829815A US82981559A US2972867A US 2972867 A US2972867 A US 2972867A US 829815 A US829815 A US 829815A US 82981559 A US82981559 A US 82981559A US 2972867 A US2972867 A US 2972867A
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US
United States
Prior art keywords
pressure cylinder
reservoir
high pressure
piston
cylinder
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
US829815A
Other languages
English (en)
Inventor
Martin L Klingler
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.)
TE Connectivity Corp
Original Assignee
AMP Inc
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
Priority to NL254235D priority Critical patent/NL254235A/xx
Application filed by AMP Inc filed Critical AMP Inc
Priority to US829815A priority patent/US2972867A/en
Priority to GB25235/60A priority patent/GB879825A/en
Priority to CH836960A priority patent/CH378688A/de
Priority to FR834048A priority patent/FR1264255A/fr
Application granted granted Critical
Publication of US2972867A publication Critical patent/US2972867A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/10—Riveting machines
    • B21J15/16—Drives for riveting machines; Transmission means therefor
    • B21J15/22—Drives for riveting machines; Transmission means therefor operated by both hydraulic or liquid pressure and gas pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/06—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam
    • F15B11/072—Combined pneumatic-hydraulic systems
    • F15B11/0725—Combined pneumatic-hydraulic systems with the driving energy being derived from a pneumatic system, a subsequent hydraulic system displacing or controlling the output element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B3/00—Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B7/00—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors
    • F15B7/06—Details
    • F15B7/08—Input units; Master units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B7/00—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors
    • F15B7/06—Details
    • F15B7/10—Compensation of the liquid content in a system
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B11/00—Automatic controllers
    • G05B11/44—Automatic controllers pneumatic only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
    • F15B2211/214—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being hydrotransformers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
    • F15B2211/216—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being pneumatic-to-hydraulic converters

Definitions

  • This invention relates to devices for pressurising .a hydraulic fluid.
  • the invention is herein disclosed in ,conjunction with a fluid pressure intensifier of these called one shot type, however, it will be apparent that the invention is amenable to usage in other types of fluidoperated devices.
  • Single stroke or one she intensifiers of the type known to the art comprise a relatively large diameter low pressure cylinder and a relatively small diameter high pressure cylinder, the bore of which is, filled with oil or other hydraulic fluid.
  • the piston within the low pressure cylinder has a plunger secured thereto which extends into the bore of the high pressure cylinder so that upon movement of the piston towards the high pressure cylinder this plunger moves relatively into the bore of the high pressure cylinder to compress the hydraulic fluid therein.
  • Devices of this type are useful in a variety of applications, for example, in relatively small manually held tools such as riveting tools or electrical terminal crimping tools.
  • the motive fluid available for such tools is usually compressed air under a pressure of'about 80- 120 p.s.i.
  • the tool is adapted to operate on very high pressure (e.g. 5000-8000 p.s.i.) hydraulic fluid, the tool can be extremely small and still deliver the required force for the crimping or riveting operation.
  • the hydraulic fluid under high pressure is supplied by means of an intensifier having alow pressure air cylinder and a high pressure hydraulic cylinder which is connected by means of a flexible hose to the tool itself.
  • I-t is alfurther'objectito provide a fluidpressure intensifying'device having'fa high "pressure hydraulic cylinder and an improved replenishingres'ervoir. ⁇ or this high pressure cylinder. It is a further obj'e'ct of der are in axialalignment with each other.
  • the low pressure cyIinderJ has. a piston therein with a plunger secured to its face'which plunger extends into, and is in alignment with, ,the' highpressur'e hydraulic cylinder so that as the piston.
  • a reservoir of replenishing hydraulic fluid within the low pressure cylinder and adjacent the end thereof which is next to the high pressure cylinder there is provided a reservoir of replenishing hydraulic fluid.
  • This reservoir has one wall of a resilient'and flexible material such as oil resistant synthetic rubber'or nylon reinforced with synthetic rubber.
  • Resilient means in the form of a coil spring surrounds the plunger and bears at one'end against the face of the piston and at the other end against this resilient wall of the reservoir.
  • the reservoir itself is in communication with the bore of the high pressure cylinder by means of a' passageway so that hydraulic fluid is supplied to the bore of this high pressure cylinder to com 'pensate for any losses which maytake place during use.
  • the reservoir itself is mildly pressurized by means of the spring so that the hydraulic fluidin the reservoir is forced through the passageway as it is needed to replenish previouslosses.
  • the outlet port of the passageway connecting the reservoir withthe bore of the high pressurecylinder is located such that this port is covered and closed during initial movement of the plunger into the high pressure cylinder.
  • Figure 2 is a view similar to Figure 1 but showing the relative positions of the parts during movement of the piston-within the low pressure cylinder, and
  • Figure3 is a fragmentary view of an alternative embodiment.
  • the preferred embodiment provides a high pressure hydraulic cylinder 2 having a base porti'on4 and an axial bore 6. Cylinder 2 is secured at .i-ts base by means of fasteners 26 to a low pressure pneumaticor air cylinder 8 having a back wall 10 and in which thereis provided a piston 12. A plunger 14 secured 'to theface of thepiston by means of a plate 16 and suitable fasteners as 1 phragm 20'which surrounds plunger 14.
  • a coil spring 32 is interposed between the face of piston 12 and the flexible diaphragm of the reservoir so that this spring serves a dual function of biasing piston 12 against wall 10 of the low pressure cylinder and at the same time maintaining a mild pressurization of the reservoir 30.
  • Advantageouslyvthis spring is conical so that its adjacent convolutions fit within each other upon movement of the piston 12 towards the base 4 of the high pressure cylinder. It is desirable to provide a section of plastic tubing as shown at 34 over the convolution of the spring'32 which bears against diaphragm of the reservoir. This section of tubing increases the bearing area of the spring against the diaphragm and additionally protects it against damage by the spring.
  • a stop ring 36 on plunger 14 which is adapted to bear against clamping ring 22 when the piston has traveled its full stroke. It Will be apparent that the size and particularly the length of this stop ring is such that the ends or edges of the piston cannot contact the diaphragm of the reservoir.
  • Suitable Q-rings 38 are provided as'shown in piston 12 and in the bore of high pressure cylinder 2 to prevent leakage of compressed fluid.
  • An outlet 46 and the end of high pressure cylinder 2 accepts the coupling of a flexcylinder than is the case with the embodiment of Figure 1.
  • Toroidal member 44 may be of a firm oil resistant plastic such as a nylon.
  • the reservoir 30 is shown as being filled substantially to the limit of its capacity and the diaphragm is, therefore, convex on its external surface against which spring 32 bears.
  • the cross section will change, and the spring will press relatively further into the diaphragm.
  • the diaphragm will be concave on its external surface and will be further depressed beneath the spring than in the case in Figures 1 and '2. It will be appreciated thatv the diaphragm 'should be of relatively tough and strong material in order to permit it to withstand the pressure of the fluid.
  • Figure 3 shows an alternative embodiment in which plastic tube 34 is replaced by a toroidal member 44 havingja radius of .curvature on its external surface which is slightlyless than the radius of curvature of surface 18'.
  • Apparatus for pressurizing a :hydraulic fluid comprising, a low pressure cylinder and a high pressure cylinder, said high pressure cylinder having a base portion which forms one end of said low pressure cylinder, a piston in said low pressure cylinder having a plunger extending therefrom into said high pressure cylinder, a replenishing reservoir for said high pressure cylinder in said low pressure cylinder and disposed adjacent said one end, a. passageway extending from said reservoir to said high pressure cylinder, resilient means surrounding said plunger and normally biasing said piston towards the opposite end of said low pressure cylinder, said resilient means bearing against said'reservoir thereby to maintain a pressure on said reservoir and maintain a full charge of fluid in said high'pressure cylinder.
  • a pressure multiplying device comprising, a low pressure cylinder and a high pressure cylinder, said high pressure cylinder having a base portion which forms one end of said low pressure cylinder, a piston in said low pressure cylinder having a plunger extending therefrom into said high pressure cylinder, 21 replenishing reservoir for said high pressure cylinder in said low pressure cylinder and disposed adjacent said one end, a passageway extending from said reservoir. and opening into said high pressure cylinder at a point adjacent the end of said plunger when said plunger is in its retracted position whereby, said'passageway is closed upon movement of said plunger, and means Within said low pressure cylinder for maintaining a mild pressurization of reservoir.
  • a pressure multiplying device comprising, a low pressure cylinder and a high pressure cylinder, said high pressure cylinder having a base portion which forms one end of said low pressure cylinder, a piston in said low pressure cylinder having aplunger extending therefrom into said high pressure cylinder, a replenishing reservoir for said high pressure cylinder in said low pressure cylinder and disposed adjacent said one end, a passageway ex,- tending from. said reservoir and.
  • a fluid. pressure multiplying device comprising a low'pressure cylinder and a high pressure cylinder, said cylinders being disposed in axial alignment, apiston in said low pressure cylinder having a plunger extending therefrom into said high pressure cylinder, the end'of' said low pressure cylinder which is adjacent said high pressure cylinder having therein an annular reservoir surrounding said plunger, said reservoir being defined by a flexible, substantially impervious disc having a central, opening and by said end of said low pressure cylinder, a passage; way extending ,from said reservoir to said highpressure cylinder, and means in said low pressure cylinderforirn'. posinga mild-pressure on said disc thereby to naintain a ful sha e f lu d i i i h pressure cylind r, f
  • a fluid pressureinteu sifier comprising a relatively large diameter low pressure cylinder and a relatively small diameter high pressure cylinder, said cylinders being axially aligned, a piston in said low pressure cylin der having a plunger secured thereto and extending towards said high pressure cylinder, a reservoir in said low pressure cylinder disposed adjacent the one end thereof which is adjacent said high pressure cylinder, a passageway leading from said reservoir to said high pressure cylinder, and compressible resilient means interposed between said reservoir and the face of said piston whereby said resilient means biases said piston towards the opposite end of said low pressure cylinder and maintains a pressure on said reservoir thereby to maintain a full charge of fluid in said high pressure cylinder.
  • a device as set forth in claim 5 wherein said pas sageway opens into said high pressure cylinder at a location adjacent the end thereof which is adjacent said low pressure cylinder whereby, said passageway is closed upon movement of said plunger and said reservoir is not subjected to pressure obtained in said high pressure cylinder.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Actuator (AREA)
  • Transmission Of Braking Force In Braking Systems (AREA)
US829815A 1959-07-27 1959-07-27 Pressure intensification device Expired - Lifetime US2972867A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL254235D NL254235A (en)) 1959-07-27
US829815A US2972867A (en) 1959-07-27 1959-07-27 Pressure intensification device
GB25235/60A GB879825A (en) 1959-07-27 1960-07-20 Improvements in pressure-multiplying devices
CH836960A CH378688A (de) 1959-07-27 1960-07-21 Drucktransformator
FR834048A FR1264255A (fr) 1959-07-27 1960-07-26 Dispositif multiplicateur de pression

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US829815A US2972867A (en) 1959-07-27 1959-07-27 Pressure intensification device

Publications (1)

Publication Number Publication Date
US2972867A true US2972867A (en) 1961-02-28

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US829815A Expired - Lifetime US2972867A (en) 1959-07-27 1959-07-27 Pressure intensification device

Country Status (4)

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US (1) US2972867A (en))
CH (1) CH378688A (en))
GB (1) GB879825A (en))
NL (1) NL254235A (en))

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3144753A (en) * 1960-11-10 1964-08-18 Lawrence M Sanders Hydraulic brake system and components thereof
US3688501A (en) * 1970-07-30 1972-09-05 Ellis Eng Inc Fluid pressure amplifier
US3748860A (en) * 1971-02-05 1973-07-31 Altec Mfg Co Inc Hydraulic booster
WO2002084128A1 (en) * 2001-03-26 2002-10-24 Attexor Tools S.A. A pneunatic-hydraulic pressure amplifier
CN108869417A (zh) * 2018-09-04 2018-11-23 贾照宇 增压发生器

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3315008A1 (de) * 1983-04-26 1984-10-31 Robert Bosch Gmbh, 7000 Stuttgart Vorrichtung zum erzeugen eines fluessigkeitsdruckes
FR2554038A1 (fr) * 1983-10-28 1985-05-03 Pellenc & Motte Outils hydropneumatiques portatifs, par exemple secateurs hydropneumatiques

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2335748A (en) * 1941-10-13 1943-11-30 Hydraulic Brake Co Fluid pressure producing device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2335748A (en) * 1941-10-13 1943-11-30 Hydraulic Brake Co Fluid pressure producing device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3144753A (en) * 1960-11-10 1964-08-18 Lawrence M Sanders Hydraulic brake system and components thereof
US3688501A (en) * 1970-07-30 1972-09-05 Ellis Eng Inc Fluid pressure amplifier
US3748860A (en) * 1971-02-05 1973-07-31 Altec Mfg Co Inc Hydraulic booster
WO2002084128A1 (en) * 2001-03-26 2002-10-24 Attexor Tools S.A. A pneunatic-hydraulic pressure amplifier
CN108869417A (zh) * 2018-09-04 2018-11-23 贾照宇 增压发生器

Also Published As

Publication number Publication date
CH378688A (de) 1964-06-15
GB879825A (en) 1961-10-11
NL254235A (en))

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