US3890824A - Implosion jack - Google Patents

Implosion jack Download PDF

Info

Publication number
US3890824A
US3890824A US303057A US30305772A US3890824A US 3890824 A US3890824 A US 3890824A US 303057 A US303057 A US 303057A US 30305772 A US30305772 A US 30305772A US 3890824 A US3890824 A US 3890824A
Authority
US
United States
Prior art keywords
piston
chamber
vacuum
fluid
jack
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
US303057A
Other languages
English (en)
Inventor
Jean Camion
Etienne Campot
Jean Conneau
Serge Contival
Andre Dejoux
Jean Detton
Maurice Gournelle
Antoine Traimond
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 US3890824A publication Critical patent/US3890824A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B17/00—Reciprocating-piston machines or engines characterised by use of uniflow principle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B17/00—Reciprocating-piston machines or engines characterised by use of uniflow principle
    • F01B17/02—Engines
    • 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
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • 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
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
    • F15B11/036—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force by means of servomotors having a plurality of working chambers
    • F15B11/0365—Tandem constructions
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/26—Locking mechanisms
    • F15B15/261—Locking mechanisms using positive interengagement, e.g. balls and grooves, for locking in the end positions
    • 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
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
    • F15B2211/3057—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve having two valves, one for each port of a double-acting output member
    • 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members
    • 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
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/89—Control specific for achieving vacuum or "negative pressure"

Definitions

  • demeurant 6 avenue de brimont, Chatou; Jean Conneau, demeurant 58 Bd. Voltaire, Paris; Serge Contival, 253 Ed. Gabirel Peri, noisysy-Le-Sec; Andre Dejoux, demeurant 15, rue Lakanal; Jean Detton, demeurant 80 rue Taitbout, both of Paris; Maurice Gournelle, demeurant 1 rue des Bruyeres, Asnieres; Antoine Traimond, 7 rue Jean Ferrandi, Paris, all of France 22 Filed: Nov. 2, 1972 21 Appl. No.: 303,057
  • the chamber is evacuated on both sides of the piston" by a vacuum source.
  • the chamber on one side of the piston, is disconnected from the vacuum source and connected to a source of fluid under pressure for moving the piston toward a second position in the chamber.
  • a striker connected to the piston then imparts a force upon a mass located externally of the chamber.
  • the known devices for the linear displacement of a member by means of a jack hardly exceed a speed of m/sec. To attain the highest speeds, the devices used at this time are very complicated. As far as present shock machines using a fluid motor are concerned, these devices are such that they do not easily make it possible to obtain large impact efforts nor rapid rates of operation.
  • the present invention in particular has the objective of avoiding these inconveniences through simplicity of design, through the energy used, which is the pressure of a fluid associated with a vacuum. Air at atmospheric pressure, for example, is a practically constant energy on sea level which is always available and which does not cost anything. With regard to the vacuum, its obtention is well known. Vacuum pumps are relatively silent and the power and flow rates necessary to create a vacuum in the jacks according to the invention are perfectly compatible.
  • the present invention is an improvement of the invention by Mr. Maurice Gournelle covered by the patent application filed in France on Sept. 8, 1970.
  • Another purpose of the invention is considerably to increase the performances of apparatuses of this type and, by virtue of this fact, to extend their use to other fields.
  • the principle of this jack is based on the use of the vacuum associated with atmospheric pressure.
  • This speed is communicated by the expansion of the air or the gas which is compressed in the vacuum. It is evident that the more the gas is compressed, the bigger the expansion effect will be at the moment we unlock the system that keeps the mobile parts in place and the faster will be the speed obtained for a small distance through which said mobile parts move.
  • the vacuum necessary is on the order of 10 mm Hg. When the motor fluid is at atmospheric pressure, in order to obtain fast speed it is necessary to have the mobile parts move through a longer distance, because the faster speed we want, the longer the run would have to be (2-3 m).
  • Atmospheric pressure is best because it does not require any particular devices for its utilization except that we have to provide the jack with cross sectional dimensions which will have to be bigger than when we use compressed gas, which is less with regard to the power it enables us to obtain.
  • Another version of the invention is intended to double its energy and includes arranging two jacks according to the invention opposite each other.
  • their locking devices of each one of them are released at the same time, their mobile equipment parts and particularly their striking mass, attached to the end of their rod, will simultaneously strike on each side of the material to be worked, for example, in cataclysm involving shock.
  • the entire energy of the system is used.
  • Another version of the invention intended to multiply its energy, consists in arranging two multiple-stage jacks, for example, opposite each other, as before.
  • Another version of the invention intended to increase its energy includes providing for cooperation between several simple jacks or jacks in series, three, for example, by connecting their rods to an assembly intended to add up their efforts or to arrange two series of three simple or tiered jacks, opposite each other, as mentioned above.
  • Another version of the invention applicable to fields covered by present impact machines involves an arrangement permitting a fast cadence and includes having the rod come out on each side of the jack, with two 3 locking positions, that is, incoming and outgoing.
  • the double-action apparatus enables us to set up two work stations.
  • Another arrangement includes ribbing the piston in such a way that it will be practically undeformable.
  • the rod itself is reinforced by a bracing tube designed so as to be able to resist buckling.
  • the active end of the rod has an intermediate piece which is intended to receive the hammering efforts. It is treated as a wear-and-tear piece.
  • FIG. 1 is a front view partially in section of a highpower jack
  • FIG. 2 is a diagrammatic view showing distribution of fluids in the jack
  • FIG. 3 is a front view partially in section showing an embodiment of the jack operated by shock catalysis
  • FIG. 4 is a front view partially in section showing an embodiment where the jack has several stages, in series,
  • FIG. 5 is a top view of the multistage jack and the arrangement of tie rods shown in FIG. 4,
  • FIG. 6 represents an assembly of single-cylinderjacks or multistage jacks arranged in parallel
  • FIG. 7 represents the front view of the assembly shown in FIG. 6.
  • FIG. 1 shows a longitudinal partly cross-section view of a high-power jack. It has cylinder 1, forward bottle 2, rear bottle 3, tie rods 4, piston 5, and sealing joints on 6, 7 and 8 the cylinder, piston and piston rod, respectively.
  • the moving parts are piston 5, rod 9 made of silicomanganese steel (for example, 45-88), shouldered at 10 to receive the piston 5 which is made in one piece with rod 9 by means of a washer 10 and a series of screws 11.
  • Piston 5 is made of molded duraluminum; it has a series of eight ribs 12 to make it practically undeformable at the moment of impact.
  • the carrying joints 7 of piston 5 can be made of graphite-treated rilsan and the sealing joints of the I-Iuhn or Riwgter type, well known to the expert, are preferably arranged between the carrying joints.
  • the bore of cylinder 1 as well as ring 13 are made of hard steel, and rod 9 will be treated with Tenifer.
  • a scraping joint 14 prevents foreign bodies from getting into the cylinder.
  • the striking mass 16 made, for example, of 35NC15 steel, involving a groove 17 intended to lock-by means of the turning key 18, supported by bearing 19, which is in one piece with forward bottle 2the hammering washers 20 and 21.
  • Turning key 18 is moved by an electromagnet with appropriate dimensions and force (not shown) or by any other mechanical means.
  • This type of jack will preferably be arranged vertically in order to reduce the friction of the sealing joints under the action of the weight of the mobile equipment. Due to the operating principle, key 18 will have to support only the weight of the mobile equipment portions and possibly the differential pressure between chambers 22 and 23.
  • the tie rods are attached to the bottles in a manner identical to the jack rod by means of plates such as at 10 and a series of screws 11.
  • FIG. 2 shows the diagram for the distribution of fluids in the jack.
  • the chamber 22 of the jack has an opening 24 out of which comes a pipe for the admission of atmospheric pressure which is taken at 29 in the filtering container 28 (which has a large volume so as to avoid charge losses due to the filter) and involving electric valves Vatl.
  • Out of opening 25 comes a tube which leads to the balloon in which prevails vacuum 30.
  • Communication with the vacuum is controlled by electrovalve Vvl.
  • a pressure gauge controls the level of rarefaction of the air in chamber 22.
  • Opening 26 is connected by a pipe to a balloon in which a vacuum prevails. Communication between this balloon and chamber 23 is controlled by electrovalve Vv2.
  • Opening 27, situated inside filtering container 28, is connected to the electric valve for the admission of atmospheric pressure Vat2 which has a very large capacity so that the admission of atmospheric pressure or of a compressed gas will not be braked.
  • this jack operates as follows: the strike order is given when the following conditions are met: the moving equipment portions are locked at high neutral gear by key 18. Vatl and Vat2 are closed. Vvl and Vv2 are open, chambers 22 and 23 are under a vacuum; M gives its permission (when predetermined rarefaction has been attained). At this moment, the strike order is possible. This order is given by operating key 18, for example, automatically, by means of an electromagnet.
  • an electrical passage contact closes Vv2; at the end of the movement and simultaneously the piston is unlocked and a second contact opens Vat2 through which air, at atmospheric pressure, rushes at very great speed into the vacuum of chamber 23 and hits the piston, causing it to move all the more faster because a strong vacuum is created in chamber 22.
  • Vatl is closed and Vvl is opened, providing communication between chamber 22 and balloon 30 where the vacuum is created by pump 31.
  • electrovalve Vatl may have a diaphragm and may be servocontrolled by the displacement of the rod so as progressively to admit atmospheric pressure.
  • FIG. 3 shows an arrangement of a jack for the application of cataclysm by shock. It is connected to a crater or mixing'bowl dieplate 32 by means of columns 33 which are attached, on the one hand, to the forward bottle 2 of the jack by means of a shoulder, a washer 34, and a series of screws 35, and, on the other hand, on dieplate 32 by means of centering device 36, the shoulder 37 and the screws 38.
  • Dieplate 32 supports an intermediate striking block similar to'the column block sliding on columns 40 and attached to dieplate 32, by means of hard steel rings 41, treated with Tenifer.
  • Plate 39 which is as light and as rigid as possible, carries striking piece 42 which is centered and attached by a series of screws 43.
  • the moving part of the intermediate striking tool is raised after each operation by a series of hydraulic jacks. It is kept at high neutral gear (PMI-I) by a very light spring locking device whose only purpose is to keep it at PMH while the lifting jacks, not shown, are moved away.
  • PMI-I high neutral gear
  • the crater dieplate 32 has a crucible 44 in which the material to be worked is placed.
  • This crucible itself is arranged in a kind of movable basin 45 attached to the dieplate by means of screws 46.
  • the bottom of piece 45 is equipped with an extraction foot in order to extract crucible 44 from basin 45 after the treatment of the material. All of these elements are carefully adjusted. However, in order to catch any possible defects, a hydraulic pressure of about 1 t/cm obtained by power multiplier, is directed through channel 49; it can also serve for the extraction of basin 45. Tightness is guaranteed by special joints 47 and 50.
  • a connected chamber 51 not shown, is provided for working in a vacuum. A space (1 between the material to be worked and piece 42 is possible.
  • the opening jacks release the tool 42 at the height necessary for extraction and for the replacement of crucible 44 and basin 45. Tool 42 is then lowered again and locked in place for a new operation.
  • the mobile equipment of the jack as well as that of the striking tool are free at the moment of impact and columns 33 therefore have to support only the weight of the assembly with good geometric corrections (limiting the bending and buckling).
  • the crater dieplate is arranged on a hard-steel support plate 52 which itself floats on lead or is anchored on a massive piece of concrete with very great inertia and resting on a bed of sand so as to absorb the vibrations due to the shocks.
  • FIG. 4 shows an arrangement of a jack with several stages in series. It involves a succession of cylinders 1 which are attached to intermediate bottles 53 by means 6 .of tie rods 4 arranged according to FIG. 5, that is to say, the first cylinder is attached to the bottles by tie rods arranged at l and the second one by tie rods arranged at 2, the third one by tie rods arranged at 1, and so forth.
  • the moving equipment is made up of a rod 54,
  • FIGS. 6 and 7 show an assembly of three singlecylinder or multi-cylinder jacks arranged parallel.
  • the three or n cylinders of the jack are tightened between bottles 56 and 57 by tie rods 4 identical to those in FIG. 1 and arranged according to FIG. 7.
  • the three jack rods are assembled on a block 58 which has a triangular shape by means of a shoulder 59, washer 60, and screws 61; the striking nose 62 is centered and attached on block 58. Locking is obtained by the turning key 18 which turns in block 19 and moves as provided for in the example in FIG. 1.
  • This assembly operates in a manner similar to the one described in FIG. 2.
  • the feed devices for these same chambers are arranged in series.
  • a filtering tank 28 encloses the three jacks and its volume is a function of their cylinders without causing any charge loss.
  • the opposite arrangement of these simple or series jacks makes it possible to multiply the energy of the shock.
  • the jacks in this case are arranged along a horizontal line and their mobile masses must be rigorously identical.
  • the same chambers are connected in series to the same pipelines for conducting the atmospheric pressure and for communication with the vacuum.
  • the crater die plate is mounted in a floating fashion and in one piece with two intermediate striking tools each having its own opening mechanism involving connected hydraulic jacks.
  • the jacks have a forward guard so as to compensate for any possible gaps in the displacement speed of jacks arranged opposite each other.
  • the unlocking order is simultaneous for the two assemblies and is given by means of a common set of rods regulated with great precision.
  • the floating die plate moves slightly if one of the striking noses is reached by a jack advancing forward of the other, and the slowdown following this enables the second jack to compensate for its delay.
  • the device involved in this invention may be used primarily for catalysis by means of shock and for very high-energy shock machines. It can also be used advantageously to obtain fast moving speeds.
  • a force-producing device comprising a chamber, a piston movable between first and second positions in the chamber, transmitting means connected to the piston for transmitting force generated by the piston moving between the first and second positions, vacuum means connected to the chamber on both sides of the piston for evacuating fluid from the chamber, fluid means connected to the chamber on both sides of the piston for introducing fluid into the chamber, valve means associated with the vacuum and fluid means for selectively communicating the vacuum and fluid means with the chamber on each side of the piston.
  • the vacuum means includes a single vacuum source connected to the chamber on both sides of the piston.
  • the device in claim 1 and further including a stationary body including a crater therein, a crucible associated with the crucible for applying a counterpressure to' the crucible on the side opposite the transmitting means.
  • the pressure means is capable of applying a pressure of at least about 1 t/cm 12.
  • the piston is in the first position when the vacuum means communicates with the chamber on both sides of the piston, and the piston will be forced to move toward the second position when a predetermined negative pressure is reached in the chamber on one side of the piston and communication between the vacuum means and the chamber on the other side of the piston is stopped and the chamber on said other side of the piston is communicated with the fluid means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Press Drives And Press Lines (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
US303057A 1971-11-05 1972-11-02 Implosion jack Expired - Lifetime US3890824A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7139699A FR2158137B1 (OSRAM) 1971-11-05 1971-11-05

Publications (1)

Publication Number Publication Date
US3890824A true US3890824A (en) 1975-06-24

Family

ID=9085365

Family Applications (1)

Application Number Title Priority Date Filing Date
US303057A Expired - Lifetime US3890824A (en) 1971-11-05 1972-11-02 Implosion jack

Country Status (4)

Country Link
US (1) US3890824A (OSRAM)
DE (1) DE2253910A1 (OSRAM)
FR (1) FR2158137B1 (OSRAM)
GB (1) GB1415866A (OSRAM)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104148563A (zh) * 2014-07-30 2014-11-19 太仓市顺昌锻造有限公司 新型空气锤
US20150020893A1 (en) * 2013-07-22 2015-01-22 Luke S. Colby Locking Poppet Valve
EP2769820A4 (en) * 2011-10-19 2015-06-24 Toyota Jidoshokki Kk INJECTION DEVICE

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4572057A (en) * 1983-10-21 1986-02-25 Hoerbiger Pneumatic Gesellschaft Mbh Pneumatic or hydraulic actuation device
DE3814318C2 (de) * 1988-04-28 1994-02-03 Stauch Heinrich E Pneumatische Presse für die Herstellung von Gegenständen aus Kunststoffen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3178497A (en) * 1961-11-08 1965-04-13 Leo A Moscicki Methods and apparatus for injection molding
US3187548A (en) * 1961-09-13 1965-06-08 Trans Energy Corp High energy machine
US3323346A (en) * 1965-01-08 1967-06-06 Etc Inc Fluid-actuated hand tool
US3470284A (en) * 1965-05-14 1969-09-30 Gundlach Gmbh Aug Device for producing refractory bodies and a method of producing such bodies
US3692456A (en) * 1970-12-28 1972-09-19 J L Mfg Co Apparatus for converting molten thermoplastic in cup-like articles
US3734008A (en) * 1970-12-21 1973-05-22 O Akerberg Arrangement in receptacles for receiving materials,particularly refuse

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR607818A (fr) * 1925-12-08 1926-07-09 Servo-moteur à vide
US3402778A (en) * 1967-04-18 1968-09-24 D F Carter Co Pneumatic rivet gun

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3187548A (en) * 1961-09-13 1965-06-08 Trans Energy Corp High energy machine
US3178497A (en) * 1961-11-08 1965-04-13 Leo A Moscicki Methods and apparatus for injection molding
US3323346A (en) * 1965-01-08 1967-06-06 Etc Inc Fluid-actuated hand tool
US3470284A (en) * 1965-05-14 1969-09-30 Gundlach Gmbh Aug Device for producing refractory bodies and a method of producing such bodies
US3734008A (en) * 1970-12-21 1973-05-22 O Akerberg Arrangement in receptacles for receiving materials,particularly refuse
US3692456A (en) * 1970-12-28 1972-09-19 J L Mfg Co Apparatus for converting molten thermoplastic in cup-like articles

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2769820A4 (en) * 2011-10-19 2015-06-24 Toyota Jidoshokki Kk INJECTION DEVICE
US9248596B2 (en) 2011-10-19 2016-02-02 Kabushiki Kaisha Toyota Jidoshokki Injection apparatus
US20150020893A1 (en) * 2013-07-22 2015-01-22 Luke S. Colby Locking Poppet Valve
US9423034B2 (en) * 2013-07-22 2016-08-23 Luke S. Colby Locking poppet valve
CN104148563A (zh) * 2014-07-30 2014-11-19 太仓市顺昌锻造有限公司 新型空气锤
CN104148563B (zh) * 2014-07-30 2016-08-24 太仓市顺昌锻造有限公司 新型空气锤

Also Published As

Publication number Publication date
DE2253910A1 (de) 1973-05-24
GB1415866A (en) 1975-11-26
FR2158137B1 (OSRAM) 1975-07-18
FR2158137A1 (OSRAM) 1973-06-15

Similar Documents

Publication Publication Date Title
EP2766611B1 (en) Apparatus with accumulator
US3821992A (en) Impact device using a gas as its medium
US4049367A (en) Apparatus for generating shock waves by means of a supersonic projectile
US3376723A (en) Methods and apparatus for forming material by sudden impulses
US4018135A (en) Hydraulically powered impact device
US4231434A (en) Hydraulic impact device
US3412554A (en) Device for building up high pulse liquid pressures
US3890824A (en) Implosion jack
GB923716A (en) A forming or impacting machine
CN103215954A (zh) 增力型密闭筒式液压打桩锤
US3271991A (en) High energy impact machine
GB1351013A (en) Method and apparatus for high energy impulse working of materials
US4770269A (en) Closed air system seismic wave generator
US2932951A (en) Forming apparatus
WO2003033187A1 (en) Hydraulic pressure forming using a self aligning and activating die system
US4409166A (en) Method of producing fireproof bricks
RU2213640C2 (ru) Пресс-молот (варианты)
GB1278155A (en) Counter-blow hammer
US3548630A (en) Apparatus for forming material by sudden impulses
US3296853A (en) Fluid-operated press
US3713367A (en) Fluid pressure operated motors
US3404555A (en) High energy rate forming machine
US3270375A (en) Jolting mechanism for foundry apparatus
GB1072747A (en) Improvements in high energy impact machines
JPH0639796Y2 (ja) 破砕機本体の構造