EP0723492A1 - Schlagelement - Google Patents
SchlagelementInfo
- Publication number
- EP0723492A1 EP0723492A1 EP94925461A EP94925461A EP0723492A1 EP 0723492 A1 EP0723492 A1 EP 0723492A1 EP 94925461 A EP94925461 A EP 94925461A EP 94925461 A EP94925461 A EP 94925461A EP 0723492 A1 EP0723492 A1 EP 0723492A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- molded
- pressure
- piston
- molded piston
- element according
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
- B25D9/14—Control devices for the reciprocating piston
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
- B25D2217/0011—Details of anvils, guide-sleeves or pistons
- B25D2217/0023—Pistons
- B25D2217/0026—Double pistons
Definitions
- the invention relates to an impact element according to the preamble of patent claim 1.
- Impact elements as parts of an impact tool are known. They generate impacts and transfer them to the tool belonging to the striking tool. For example, we would like to remind you of electric percussion drills in which an imbalance connected to the drill drive acts as the striking element and, when working with the drill as a tool, can cause it to perform additional axial impacts.
- a striking element mainly used in surgery is described in EP 0 452 543 AI.
- a single piston which can be moved in a cylinder by compressed air, acts on it. This strikes a first impact surface during a piston advance directed against a tool connected to the striking element, this impact being transmitted to the tool.
- the piston hits a second baffle.
- the tool it is called, for example, a rasp - is successively exposed to a driving push or an opposing, loosening push.
- REPLACEMENT BLA ⁇ (RULE 26) There is at least one overflow channel between the first and the second impact surface with which the pressure necessary for the movement of the piston is built up during the movement process. Furthermore, at least one inlet and one outlet for the compressed air are provided.
- a total volume is determined at certain positions of the piston, which consists of a first partial volume, which lies between the first impact surface and the piston surface belonging to it, and the volume of the overflow channel. Only when the ratio of the value of this total volume to the area of the effective first impact surface or the second impact surface exceeds predetermined values can the necessary pressure be built up and the striking element works. Forms of training are specified by means of which the loosening thrust can be suppressed either permanently or temporarily.
- the impact element according to EP 0 452 543 AI has a relatively complicated mechanical structure. For example, it has two different diameters for the cylinder bore and the piston diameter, a column running inside the piston and a total of six baffles requiring rework.
- the piston itself has only a small mass compared to the overall arrangement of the striking element. Since the pressure in the volume between the respective baffle plate and the associated piston surface is built up or reduced only during the movement, the run
- the invention is therefore based on the object of creating a striking element which, with comparable external dimensions to the above-described striking element, achieves a higher impact frequency and transmits a larger amount of energy to the tool per impact.
- FIG. 1 shows a first example of a striking element with two molded pistons in a longitudinal section
- FIG. 2 shows the striking element according to FIG. 1 in a cross section A-A
- FIG. 3 shows the striking element according to FIG. 1 in a cross section BB
- 4 shows the impact element according to FIG. 1 in a side view
- FIG. 5 shows a simplified diagram of the mode of operation of the striking element according to FIG. 1,
- FIG. 6 shows the position of the openings of the pressure lines and the pressure supply lines within the bores in a striking element according to FIG. 1,
- FIG. 8 shows an impact element similar to that of FIG. 1, in which the impacts are transmitted by means of firing pins;
- Fig. 9 shows a second example of a striking element.
- FIGS. 1 to 4 A first example of an impact element 1 according to the invention is shown in FIGS. 1 to 4. It has two molded pistons 2, a first molded piston 2.1 and a second molded piston 2.2.
- the striking element 1 has a body 3, which is designed here in the form of an elongated prism.
- the body 3 can also be designed differently.
- a first bore 4.1 and a second bore 4.2 pass through the body 3 in parallel.
- the bores 4 lie in the direction of the largest axis - here from the left to the right - of the body 3.
- the first molded piston 2.1 runs in the first bore 4.1
- the second molded piston 2.2 runs in the second bore 4.2.
- the right end face of the body 3 is closed by a first stop (5.1), here a first baffle plate 5.1, the left end face by a second stop (5.2), here a second baffle plate 5.2, both lying transversely to the axes of the bores 4.
- a first stop here a first baffle plate 5.1
- a second stop here a second baffle plate 5.2
- the molded pistons 2 run gas-tight in the associated bores 4 and can individually exert 5 impacts on the baffle plates.
- the gas tightness between the body 3 and the baffle plates 5 is achieved, for example, by seals 6, that between the body 3 and the molded piston 2, for example, by lubrication.
- the second - baffle plate 5.2 a nipple 7 (in the example 2 and in the claims called "shaft” 7) is attached, which carries a thread here, and on which a tool, not shown here, for example a rasp, a saw or a drill - mostly by means of a quick-release fastener or a drill chuck, and to which the impacts of the striking element 1 are transmitted.
- a tool not shown here, for example a rasp, a saw or a drill - mostly by means of a quick-release fastener or a drill chuck, and to which the impacts of the striking element 1 are transmitted.
- a tool not shown here, for example a rasp, a saw or a drill - mostly by means of a quick-release fastener or a drill chuck, and to which the impacts of the striking element 1 are transmitted.
- other types of fastening for interchangeable tools can also be provided.
- the molded pistons 2 have incisions 8 in the form of millings or indentations at predetermined locations on their lateral surfaces, here annular incisions 8 in the form of a first recess 8.1 on the right and a second recess 8.2 on the left on the first molded piston 2.1 and a third recess 8.3 right and a fourth turn 8.4. left of the second molded piston 2.2.
- These incisions 8 can also be shaped differently, e.g. as in the axial direction of the bores 4 over short places longitudinal milling. Then the molded pistons 2 must have, for example, a cross section that cannot be rotated against the body 3.
- the molded piston 2 and / or the baffle plates 5 are preferably designed such that the molded piston 2 cannot touch the baffle plate 5 over its entire end face, so that an end space 9 always remains even when a molded piston 2 bumps against a baffle plate 5.
- REPLACEMENT BLA ⁇ (RULE 26)
- the transmission of the impact from the molded pistons 2.1 and 2.2 to the baffle plates 5.1 and 5.2 can also take place in a different way, for example, an impact element is shown in FIG. 8, in which the impact is transmitted by means of four firing pins 15.1 to 15.4.
- the remaining parts correspond to those in the previous figures, they are identified by the same suffix.
- the pressure lines 10 can also end at the front ends of the outer walls of the bores 4.
- the scheme of the operation of this control is shown in FIG. 5 with the sub-figures 5A to 5D. 6, the pressure line ends 11.l to 11.8 and the pressure supply lines 12.1 to 12.8 are given by way of example on the lateral surfaces of the bores 4.1 and 4.2. These are not shown in the sub-figures 5A to 5D for reasons of space, but their positions can be easily recognized by looking at FIGS. 5 and 6. Furthermore, the end spaces 9, to which a high pressure is applied, are hatched, the vented end spaces are shown hatched.
- both molded pistons 2.1 and 2.2 are on the right on the baffle plate 5.2.
- the first end space 9.1. on the right side of the first piston 2.1 is connected via a first pressure line 10.1 to the location of the third turn 8.3 on the second piston 2.2 and ends there at the fifth pressure line opening 11.5.
- the third turn 8.3 is vented through a fifth pressure supply line 12.5.
- the first end space 9.1 is thus also vented via the pressure line 10.1, there no pressure acts on the molded piston 2.1.
- the second end space 9.2. is on the left side of the first piston 2.1 through a second pressure line 10.2 with the location of the fourth turn 8.4 on the second piston 2.2. connected and ends there at the seventh pressure line opening 11.7.
- the fourth turn 8.4 is placed at high pressure (for example 6 bar) via a pressure feed line 12.7. Via the pressure line 10.2 the second end space 9.2. put on high pressure. If the second end space 9.2 is at high pressure and the first end space is vented, the molded piston 2.1 is pressed against the baffle plate 5.1 and does not move.
- the third final space 9.3. on the right side of the second plunger 2.2 is connected via a third pressure line 10.3 to the location of the first turn 8.1 on the first plunger 2.1 and ends there at the first pressure line opening 11.1.
- the first turn 8.1 is through a first pressure supply line 12.1 put on the high pressure.
- Via the third pressure line 10.3, the third end space 9.3 is also placed at the high pressure.
- the fourth final space 9.4. on the left side of the second molded piston 2.2 is connected via a fourth pressure line 10.4 to the location of the second recess 8.2 on the first molded piston 2.1 and ends there at the third pressure line opening 11.3.
- the second indentation 8.2 is vented through a third pressure line 12.3.
- the fourth end space 9.4 is thus also vented via the pressure line 10.4.
- the second molded piston 2.2 is displaced to the left, as indicated by the arrow drawn in it.
- the indentations 8 are dimensioned such that the associated pressure line opening 11 and the pressure line 12 have just space next to one another, for example in the direction of the circumference.
- the pressure difference displacing the second molded piston 2.2 is maintained by this arrangement until the molded piston 2.2 runs onto the baffle plate 5.2. The position of FIG. 5B is thus reached.
- the first end space is 9.1. on the first piston 2.1 through a fifth pressure line 10.5 connected to the now changed location of the third recess 8.3 on the second piston 2.2 and ends there at the sixth pressure line opening 11.6.
- the third indentation 8.3 is replaced by a sixth Pressure supply line 12.6 placed on the high pressure.
- the first end space 9.1 is thus also placed at high pressure via the fifth pressure line 10.5.
- the second end space 9.2. on the first piston 2.1 is a sixth pressure line 10.6 with the now changed location of the fourth turn 8.4 on the second piston 2.2. connected and ends there at the eighth pressure line opening 11.8.
- the fourth turn 8.4 is vented through a pressure line 12.8. Via the sixth pressure line 10.6, the second end space 9.2. vented.
- the third end space is 9.3. on the second molded piston 2.2 connected via a seventh pressure line 10.7 to the now changed location of the first recess 8.1 on the first molded piston 2.1 and ends there at the second pressure line opening 11.2.
- the first turn 8.1 is vented by a second pressure line 12.2.
- the third end space 9.3 is thus also vented via the seventh pressure line 10.7.
- the fourth final space 9.4. is on the second molded piston 2.2 via an eighth pressure line 10.8 with the now changed location of the second recess 8.2 on the first molded piston 2.1. connected and ends there at the fourth pressure line opening 11.4.
- the second indentation 8.2 is placed at high pressure by a pressure feed line 12.4.
- the fourth end space 9.4 is thus also connected via the fourth pressure line 10.4. put on high pressure.
- the first end space is 9.1. on the first molded piston 2.1 connected via a first pressure line 10.1 to the now changed location of the third recess 8.3 on the second molded piston 2.2 and ends there at the fifth pressure line opening 11.5.
- the third turn 8.3 is vented through a fifth pressure supply line 12.5.
- the first end space 9.1 is thus also vented via the first pressure line 10.1.
- the second end space 9.2 on the first molded piston 2.1 is via a second pressure line 10.2 with the now changed location of the fourth turn 8.4 on the second molded piston 2.2. connected and ends there at the seventh pressure line opening 11.7.
- the fourth Turning 8.4 is placed at high pressure through a seventh pressure supply line 12.7. Via the second pressure line 10.2, the second end space 9.2. put on high pressure.
- Such a striking element consists of a body 3 with a plurality of parallel through-holes 4, which are closed off by baffle plates 5.i attached to the body 3.
- baffle plates 5.i attached to the body 3.
- a molded piston 2 runs in a pressure-tight manner. Between the end faces of the molded pistons 2 and the associated baffle plates 5 there is always a variable end space 9.
- the molded pistons 2 are used alternately for generating impacts and for controlling of the striking element 1.
- the molded pistons 2 have incisions 8 in the form of milled-in or turned-in sections at their predetermined length, so that a free space is created between the molded piston 2 and the wall of the associated bore 4 at these locations.
- a pressure line 10 leading to an end space 9 and a pressure feed line 12 each open - close adjacent.
- the incisions 8 of the molded pistons 2 each connect a pressure line 10 to a pressure line 12 at predetermined points, so that the associated end space 9 can be placed on the pressure of the pressure line 12.
- One end space 9.i is always vented on a molded piston 2, the other end space 9.k is placed under high pressure.
- a molded piston 2.i is pushed against the vented other end space 9, i by high pressure in the associated one end space 9.k until the end face of the molded piston 2, i abuts the baffle plate 5.i on the vented end space 9.i. .
- the end faces of the molded pistons 2 are smaller than their remaining cross section, so that there is always an open end space 9.
- the incisions 8 of this molded piston 2.i are brought into those positions in which they each connect a pressure line 10.i to a pressure supply line 12.i.
- the associated end space 9.1 of the other molded piston 2.1 can be placed on the pressure of the pressure supply line 12.i.
- a striking element 1 with several molded pistons 2.i can be constructed according to the same basic principle as one with two molded pistons 2. Two molded pistons 2.1 and 2.2 can be used for control and the other molded pistons 2.i and 2.k each half in parallel let the two control pistons 2.1 and 2.2 run.
- the number of incisions 8 on the molded piston remains the same.
- the number of pressure lines 10 increases in proportion to the number of molded pistons 2.
- FIG. 7 which consists of FIGS. 7A to 7C, shows a part of a striking element 1 in which the impact energy of the "loosening" impact acting counter to the direction of the tool can be reduced. In many cases this is desirable.
- the end of a bore 4 in the body 3, the molded piston 2 belonging to the bore 4, the baffle plate 5 and the end space 9 are shown.
- the baffle plate 5 is opposite of the one that is associated with the tool.
- FIG. 7 reverses an analogous situation as shown on the right-hand side of FIG. 5A, molded piston 2.2, the reference numerals used there are therefore adopted.
- the molded piston 2.2 is in an end position at the greatest distance from the molded plate 5.2.
- the milling 8.4 supplies the other, not shown shaped piston 2.1 with pressure medium via the pressure line 10.2, the end space 9.4 is vented via the pressure line 10.4.
- the fourth pressure line 10.4 starting from the notch 8.2 on the molded piston 2.1, is introduced into the bore 4.2 well before the right end of the latter.
- the head of the molded piston there is an additional nth milling 8.n shortly before its right end, which opens into the end space 9.4 via a short line 13.
- an additional o-th milling 8.o runs further to the right of the molded piston 2.2 past an additional pressure supply 12.o which carries high pressure, which is connected to the end space 9.4 by the milling 8.o via a long line 14. This places the end space 9.4 at a high pressure during the passage of time and brakes the molded piston 2.2.
- the nth milling 8.n reaches the area of the pressure line 10.4 and vents the end space 9.4 again via the short line 13.
- the oth Milling 8.o of the molded piston 2.2 then ran past the additional pressure supply 12.o and the molded piston 2.2 closes it again, so that no high pressure reaches the end space 9.4 via the long line 14.
- the end space 9.4 is vented again, the molded piston 2.2 is accelerated again a little and it hits the baffle plate 5.2 with very little impact energy.
- the energy of the "loosening" impact is significantly reduced.
- REPLACEMENT BLA ⁇ (RULE 26) It is advisable to make the pressure at the additional pressure supply 12.o adjustable by a reducing valve to the desired deceleration of the molded piston 2.2.
- FIG. 9 shows a second example of the diagram of an impact element 1 according to the invention.
- a shaft 7, to which a tool is attached passes axially through the entire first bore 4.1.
- a first molded piston 2.1 extends as an annular piston axially to the shaft 7 and seals, for example by lubrication, both over its entire length against the inner wall of the bore 4.1 and on its two end plates 17.1 and 17.2 against the shaft 7.
- the first molded piston 2.1 can thus move axially freely against the shaft 7 and an annular bead 16 attached to the shaft 7 in its interior.
- the surfaces of both stops 5.1 and 5.2 are on both sides of the annular bead 16.
- the inside of the end plates 17.1 and 17.2 of the molded piston 2.1 can strike against these stops 5.1 and 5.2.
- the first molded piston 2.1 has a single first incision 8.1, which is designed as a wide indentation over the jacket side of its central part. At both ends of the first molded piston 2.1 are located in the first bore 4.1 to the outside closed first and second end spaces 9.1 and 9.2. These end spaces 9.1 and 9.2 do not disappear even when the first molded piston 2.1 assumes one of its end positions.
- a second bore 4.2 there is a shaped piston 2 shaped as in the first example, it has two incisions 8.2 and 8.3 and runs alternately against the stops 5.3 and 5.4 in the second bore 4.2. On the inside of the stops 5.3 and 5.4 there is an end space 9.3 and 9.4. These do not disappear even if the second molded piston 2.2 is in contact with one of the stops 5.3 or 5.4.
- the first pressure supply line 12.1 leads the pressure medium to the incision 8.2 on the second molded piston 2.2 when it is in contact with the right stop 5.3 and forwards it via the first pressure line 10.1 to the first end space 9.1 on the first molded piston 2.1.
- the second pressure supply line 12.2 leads the pressure medium to the third incision 8.3 when the second molded piston 2.2 abuts the left stop 5.4 in the second bore 2.2 and forwards it via the second pressure line 10.2 to the first end space 9.1 on the first molded piston 2.1. If the second molded piston 2.2 is in a different position, these lines are blocked.
- the third pressure line 10.3 connects the third end space 9.3 on the second molded piston 2.2 to the first end space 9.1 on the first molded piston 2.1 when the edge 18.1 on the right end plate 17.1 of the first molded piston 2.1 is to the left of the mouth of the
- REPLACEMENT BLA ⁇ (RULE 26) third pressure line 10.3 is located in the first bore 4.1. It connects the third end space 9.3 with the first incision 8.1 on the first molded piston 2.1. and then passes the pressure medium via the third pressure line 12.3. from. These lines are blocked in all other positions of the molded pistons 2.1 and 2.2.
- the pressure line 10.4 connects the end space 9.4 on the second molded piston 2.2 to the end space 9.2 on the first molded piston 2.1 when the edge 18.2 on the right end plate 17.2 of the first molded piston 2.1 is to the right of the mouth of the pressure line 10.4 in the bore 4.1. It connects the end space 9.4 with the incision 8.1 on the first molded piston 2.1. and then discharges the pressure medium via the pressure feed line 12.3. These lines are in all other positions of the molded pistons 2.1 and 2.2. blocked.
- the fifth pressure line 10.5 connects the first end space 9.1 of the first molded piston 2.1 via the second notch 8.2 of the second molded piston 2.2 to the fourth pressure line 12.4 when the second molded piston 2.2 is in its left end position.
- the sixth pressure line 10.6 connects the end space 9.2 of the second molded piston 2.1 via the third notch 8.3 to the fifth pressure feed line 12.5 when the second molded piston 2.2 is in its right end position. In all other positions of the molded piston 2.2, these lines are blocked.
- Both molded pistons 2.1 and 2.2 are initially on the right side, all end spaces are free of pressure.
- the pressure medium is connected to the pressure supply lines 12.1 and 12.2, the pressure lines 12.3, 12.4 and 12.5 are used to discharge the pressure.
- the pressure medium is led via the second incision 8.2 in the second molded piston 2.2 and the first pressure line 10.1 to the right first end space 9.1 of the first molded piston 2.1, builds up a pressure there and moves the first molded piston 2.1 to the left.
- the pressure medium located in the second end space 9.2 is discharged through the sixth pressure line 10.6, the third incision 8.3 and the fifth pressure line 12.5.
- the second pressure supply line 12.2 is blocked by the second molded piston 2.2 as long as it is in its right position.
- the first incision 8.1 on the first molded piston 2.1 begins to run via the fourth pressure line 10.4 and opens it, so that the pressure building up in this way in the fourth end space 9.4 of the molded piston 2.2 via the third
- both molded pistons stand 2.1. and 2.2 in their left end position.
- the pressure medium is fed via the second pressure line 12.2 via the second notch 8.2 in the second molded piston 2.2 and the second pressure line 10.2 to the left, second end space 9.2 of the first molded piston 2.1, builds up a pressure there and moves the first molded piston 2.1 to the right.
- the pressure medium located in the first end space 9.1 is discharged through the fifth pressure line 10.5, the second notch 8.2 and the fourth pressure line 12.4.
- the first pressure supply line 12.1 is blocked by the second molded piston 2.2 as long as it is in its left position.
- the edge 18.2 of the first molded piston 2.1 runs over the mouth of the fourth pressure line 10.4 and opens it, the fourth end space 9.4 of the second molding piston 2.2 is thereby put under pressure and pushes the second molding piston 2.2 to the right.
- the first incision 8.1 on the first molded piston 2.1 begins to run via the third pressure line 10.3 and opens it, so that the pressure built up by this shift in the third end space 9.3 of the molded piston 2.2 is reduced via the third pressure line 12.3 becomes.
- the first molded piston 2.1 hits the inside of the left end plate 17.2 on the left second stop 5.2 on the annular bead 16 and the impact is transmitted to the tool via the shaft 7.
- the same means as described in the first example can be used for reducing the energy of the impacts in one direction and for adjusting the impact energy.
- either compressed air, another gas or a liquid can be used as the pressure medium.
- the baffle plates 5 must be made of tough material with high
- REPLACEMENT BLA ⁇ (RULE 26) Strength are performed, the stops 5 are tempered. For the other parts you can also use light metal or high-strength plastic.
- the striking element 1 when driving turning tools, you should build it with its axis as possible as possible in the axis of the turning tool.
- the supply of the high pressure into the striking element 1 must take place axially via a rotatable pressure coupling.
- the turning tool can be driven from the side, components, for example gearwheels, which are insensitive to axial impacts having to be used at the coupling point between the tool carrier and the gear.
- the striking element 1 has a plurality of molded pistons 2 which, with comparable dimensions, have larger masses than striking elements according to the prior art. Since the pressure in the end rooms 9 is not built up or reduced during the movement, but is changed immediately at the end of each phase, the stroke sequence is more frequent, which is further supported in Example 1 by the fact that at least two work strokes occur during a complete work cycle. It therefore delivers a greater impact energy in the unit of time.
- the impact element is used in surgery, but also in apparatus construction.
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
- Surgical Instruments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP1994/002758 WO1996005944A1 (de) | 1994-08-19 | 1994-08-19 | Schlagelement |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0723492A1 true EP0723492A1 (de) | 1996-07-31 |
EP0723492B1 EP0723492B1 (de) | 1999-10-27 |
Family
ID=8165879
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94925461A Expired - Lifetime EP0723492B1 (de) | 1994-08-19 | 1994-08-19 | Schlagelement |
Country Status (5)
Country | Link |
---|---|
US (1) | US5887665A (de) |
EP (1) | EP0723492B1 (de) |
DE (1) | DE59408866D1 (de) |
ES (1) | ES2139091T3 (de) |
WO (1) | WO1996005944A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006062356B3 (de) * | 2006-12-22 | 2008-04-24 | Storz Medical Ag | Medizinisches Gerät zur Behandlung des menschlichen oder tierischen Körpers mit mechanischen Druck- oder Stoßwellen |
DE202007007920U1 (de) * | 2007-05-31 | 2008-10-09 | Storz Medical Ag | Medizinisches Gerät zur Behandlung des menschlichen oder tierischen Körpers |
US9416593B2 (en) | 2012-12-28 | 2016-08-16 | Smith International, Inc. | Piston strike face and bit interface for percussion hammer drill |
DE102019113640B3 (de) * | 2019-05-22 | 2020-09-17 | Heraeus Medical Gmbh | Differenzdruckmotor und Verfahren zum Betreiben eines Differenzdruckmotors |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE257223C (de) * | ||||
DE231038C (de) * | ||||
DE49255C (de) * | SIELAFF in Berlin N., Zionskirchstr. 39 | Durch Luftdruck bethätigtes Werkzeug | ||
US891472A (en) * | 1907-07-10 | 1908-06-23 | Edward J Wilcox | Valve for operating rock-drills. |
US2210020A (en) * | 1939-01-23 | 1940-08-06 | Anderson Norman | Power hammer |
US2787123A (en) * | 1953-03-25 | 1957-04-02 | Frankignoul Pieux Armes | Pneumatic driving hammers |
GB1098288A (en) * | 1965-11-19 | 1968-01-10 | Dowty Technical Dev Ltd | Fluid actuated vibrator devices |
US3425499A (en) * | 1966-11-04 | 1969-02-04 | Earl H Fisher | Hydraulic vibratory hammer for driving and or extracting piles and the like |
BE725385A (de) * | 1968-12-13 | 1969-05-16 | ||
US3583499A (en) * | 1969-09-08 | 1971-06-08 | Hugo Cordes | Hydraulic pile extractor |
US4825960A (en) * | 1988-06-30 | 1989-05-02 | Molex Incorporated | Synchronized hydraulic hammer arrangement |
DE8909282U1 (de) * | 1989-08-01 | 1989-09-14 | J. Lorch Gesellschaft & Co Kg, 7035 Waldenbuch, De | |
CH681362A5 (de) * | 1990-04-20 | 1993-03-15 | Integral Medizintechnik | |
CN2080099U (zh) * | 1990-09-15 | 1991-07-03 | 党治国 | 柱塞滑阀高效气动冲击机构 |
DE59406589D1 (de) * | 1993-03-30 | 1998-09-10 | Integral Medizintechnik | Pneumatisches Schlagwerkzeug |
-
1994
- 1994-08-19 US US08/633,781 patent/US5887665A/en not_active Expired - Fee Related
- 1994-08-19 DE DE59408866T patent/DE59408866D1/de not_active Expired - Lifetime
- 1994-08-19 ES ES94925461T patent/ES2139091T3/es not_active Expired - Lifetime
- 1994-08-19 EP EP94925461A patent/EP0723492B1/de not_active Expired - Lifetime
- 1994-08-19 WO PCT/EP1994/002758 patent/WO1996005944A1/de active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO9605944A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP0723492B1 (de) | 1999-10-27 |
ES2139091T3 (es) | 2000-02-01 |
WO1996005944A1 (de) | 1996-02-29 |
DE59408866D1 (de) | 1999-12-02 |
US5887665A (en) | 1999-03-30 |
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