US20080110330A1 - Connector for Filling Concrete Formworks - Google Patents
Connector for Filling Concrete Formworks Download PDFInfo
- Publication number
- US20080110330A1 US20080110330A1 US11/855,783 US85578307A US2008110330A1 US 20080110330 A1 US20080110330 A1 US 20080110330A1 US 85578307 A US85578307 A US 85578307A US 2008110330 A1 US2008110330 A1 US 2008110330A1
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- US
- United States
- Prior art keywords
- piston
- tube
- formwork
- connector
- stopper
- 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.)
- Abandoned
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/04—Devices for both conveying and distributing
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/04—Devices for both conveying and distributing
- E04G21/0418—Devices for both conveying and distributing with distribution hose
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/04—Devices for both conveying and distributing
- E04G21/0418—Devices for both conveying and distributing with distribution hose
- E04G21/0472—Details of connection of the hose to the formwork, e.g. inlets
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
- F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
- F16K3/246—Combination of a sliding valve and a lift valve
Definitions
- formwork systems which comprise two formwork elements running parallel.
- various methods are known. For example, conventional concrete is introduced from above into the formwork, so that the concrete falls in free fall into the interior of the formwork. The concrete then fills the formwork until it reaches the top edge of the formwork elements. Such filling is preferably performed for vertically oriented building walls.
- the concrete is pumped into the formwork through filling connections in a side formwork element.
- the filling connections are usually located in the bottom area of the formwork.
- a connecting port on which a filling tube can be connected in a pressure tight way, is provided on the formwork, so that the concrete can be pumped with pressure through the port into the formwork.
- the filling tube is removed from the connecting port. If the concrete has hardened both in the formwork and also in the filling connection, then removal of the formwork is very difficult because an interfering hardened concrete plug remains.
- the present invention provides an improved connector for filling concrete formworks.
- a connector in accordance with the invention for pouring concrete into a formwork comprises a piston tube and a filling port tube which is connected to the piston tube.
- the piston tube and the filling port tube together form, essentially, a V-shaped filling connector.
- the piston tube of the filling connector is arranged flush with the formwork at one end of the piston tube.
- the piston tube includes a movable stopper piston, which has an end wall oriented in the direction of the formwork and which is moved within the interior of the piston tube by a control unit.
- the stopper piston can be moved in the piston tube so that its end wall closes flush with the formwork on which the piston tube is arranged.
- the filling port tube is fixed in the area of the formwork at an acute angle to the wall of the piston tube.
- the connection between the piston tube and the filling port tube is provided such that concrete, which is introduced into the filling port tube, flows into the piston tube in order to be led finally into the formwork.
- the stopper piston is moved in the direction of the formwork.
- the concrete in the piston tube is pressed into the formwork until the end wall of the stopper piston forms a flush seal with the formwork.
- no concrete remains in the piston tube of the filling connector. Therefore, after the concrete is dried, no plug is formed on the formwork wall which would prevent removal of the formwork.
- a concrete formwork filling connector includes a stopper piston which closes off the filling port tube with its side wall when the stopper piston forms a smooth seal with its end wall with the formwork. In this position, the end wall of the stopper piston is essentially flush with the end of the piston tube of the filling connector.
- the piston tube either stands on the formwork element of the formwork or projects so far into the formwork element of the formwork until it is flush with the inside surface of the formwork element.
- the end position of the stopper piston is also to be fixed in the piston tube as well as the cross section of the opening in the formwork.
- the stopper piston reaches, in its end position, past the end of the piston tube of the connector.
- the opening cross section in the formwork is adapted to the inner cross section of the piston tube or to the outer cross section of the piston tube.
- the stopper piston if the stopper piston is to be moved within the piston tube from its starting position in the direction towards the formwork, then the stopper piston extends with its side wall advancing increasingly into the connection point between the filling port tube and the piston tube, so that the size or cross section of a passage formed at the connection between the piston tube and filling port tube is reduced.
- the flow of concrete into the formwork can be controlled to provide a predetermined amount or dose.
- the stopper piston can be moved so far in the direction towards the formwork that it completely closes the connection passage cross section or size between the filling port tube and the piston tube. Further inflow of concrete into the piston tube may then be prevented.
- the filling connector is simultaneously blocked flush with the formwork element, which is formed in the formwork, after stopping the flow.
- a residual concrete connecting piece also called a plug
- the filling connector according to the invention has proven to be very advantageous. Due to the formwork filling provided by the stopper piston to be flush with the inside surface of the formwork element, only barely visible traces of the connector are to be detected on the hardened concrete.
- a connector for filling concrete formwork is provided with a stopper piston movable past the free end of the piston tube, in order to intentionally leave, for example, a shape in the concrete body to be created.
- a stopper piston movable past the free end of the piston tube, in order to intentionally leave, for example, a shape in the concrete body to be created.
- the end wall of the stopper piston has an exchangeable end surface that comprises, for example, a punch or a die plate, on which indicia, such as for example, the production date of the concrete part, can be stamped.
- Other information can also be stamped into the concrete part, such as the name of the manufacturing company or the composition of the concrete.
- a control unit for moving the stopper piston within the piston tube comprising a spindle which can be driven rotatably either by hand, in that a hand crank is attached at the free end of the spindle, or by a motor, in that such motor is connected directly or via gearing to the spindle.
- the movement of the stopper piston in the piston tube can then be automated, so that the flow rate of concrete can be regulated automatically.
- Several filling connectors in one formwork can be controlled centrally.
- adjustments of the position of the stopper piston can also be regulated by means of a central control, for example, in the form of software.
- catches can be provided on the spindle, which can be fixed such that further rotation past the catch is not possible.
- the filling port tube of the filling connector has a coupling on its free end.
- the coupling is used for connecting concrete feed lines, or hoses, through which concrete is pumped to the filling connector.
- these couplings are provided as quick connect couplings in order to allow quick coupling and decoupling of the feed lines.
- the quick connect couplings can be exchangeable, so that they always correspond to coupling pieces of various manufacturers and different systems. In this way, the filling connector can be adapted to the available quick connect coupling of the appropriate feed line.
- a coupling which is constructed as a quarter turn fastener, has proven to be advantageous whereby the feed line can be coupled very easily to the filling connector.
- the filling connector according to the invention has the additional advantage that it is possible, due to the closure of the filling port and the quick removal of the feed line from the filling connector through the quick connect coupling, to clean the filling port tube after filling the formwork.
- the filling port tube is flushed with water until all of the concrete in the filling port tube is removed.
- This process is usually performed when the non hardened fresh concrete has converted into young concrete, that is, it has hardened far enough that, for example, the formwork can be removed, but the young concrete has not hardened completely.
- the cleaning of the filling connector is simple, the handling of the connector as a whole is significantly improved.
- the stopper piston must seal the filling port during the cleaning to the extent that the injected water does not reach into the formwork.
- a seal is provided between the stopper piston and the piston tube, so that no concrete can flow between the stopper piston and the piston tube, which would lead to damage to the filling connector.
- the seal between the stopper piston and the piston tube is constructed as an amorphous seal.
- the amorphous seal can be realized by providing a grease film. The grease film also supports the sliding movement of the piston in the piston tube, so that the piston is supported and seizing is prevented.
- the sealing grease film it is guaranteed that the concrete flowing through the piston tube does not remain adhered to the inner wall of the piston tube.
- the present invention also provides a filling connector which is detachable from or fixed to the formwork.
- the filling connector is flanged to the formwork.
- a flange is provided at the end of the piston tube which is guided or inserted into a receptacle in the formwork, so that the filling connector is held securely and reliably on the formwork.
- the filling connector may also be welded to the formwork, which represents a durable, reliable, and robust connection.
- the proper connection of the filling connector and formwork can be realized in advance in the manufacturing plant, just like the fixing of the end position of the stopper piston. For on site assembly, no additional work is necessary. Readjustment of the motion path of the stopper piston can usually be eliminated. Thus, only the feed line must be connected to the filling port tube.
- the piston tube and the stopper piston have a cylindrical construction.
- tube piston tube and filling port tube
- piston stopper piston
- tube and piston piston
- both the tubes and also the piston may have nearly arbitrary cross sections. However, they must be fitted to each other. It is also possible to use square cross section tubes, in which a square stopper piston can move, for example.
- At least part of the filling port tube preferably can have a cylindrical cross section, so that the feed lines usually constructed with a round cross section can be connected in a simple way and without additional adapters.
- FIGS. 1A through 1C are cutaway perspective views illustrating a concrete filling connector in accordance with the invention.
- FIGS. 2A through 2C are longitudinal central section views of the connector shown in FIGS. 1A through 1C with the stopper piston in various positions corresponding to the positions in FIGS. 1A through 1C , respectively;
- FIG. 3 is a cutaway perspective view of an alternate embodiment of the invention.
- FIGS. 4A and 4B are cutaway perspective views illustrating a modified stopper piston of the filling connector including an exchangeable end face insert for the stopper piston.
- FIGS. 1A through 1C show a filling connector 1 , which is connected rigidly to a formwork 2 .
- the essentially V shaped filling connector 1 comprises a piston tube 3 and a filling port tube 4 fixed to the piston tube so that a one piece outer structure of the filling connector 1 is formed.
- the piston tube 3 is welded to a formwork element 5 of the formwork 2 , so that a durable connection between the piston tube and formwork is formed.
- the piston tube 3 is positioned at an angle of ninety degrees, that is, perpendicular to the formwork 2 .
- the piston tube 3 is connected with the formwork element 5 such that the open end 3 a of the piston tube 3 is flush with and forms a flush seal with the inside surface 5 a of the formwork element 5 .
- the formwork element 5 has an opening 6 , whose diameter corresponds to the outer diameter of the piston tube 3 .
- the filling port tube 4 is fixed to the piston tube 3 at an acute angle adjacent to or in the area of the formwork 2 .
- the filling port tube 4 is arranged at the side of the piston tube 3 at an angle of about thirty degrees.
- a stopper piston 7 is supported so that it can move in the piston tube 3 .
- the stopper piston 7 can be moved in a linear motion from the rear end 8 of the piston tube 3 in the direction towards the formwork 2 , that is, in the direction of the piston tube end 3 a .
- the linear motion of the stopper piston 7 is realized by a control unit 10 comprising a rotatable spindle 9 .
- the spindle 9 is connected on one end to a hand crank 11 , with which an operator can activate the spindle by hand.
- a motor can also be attached directly or via gearing to the free end of the spindle 9 , so that the spindle 9 is turned by such motor.
- a spindle holder 12 At the free end 8 of the piston tube 3 there is a spindle holder 12 , at which a stop 13 is formed.
- the stop 13 is part of an adjustment device 14 , which also includes two nuts 15 a , 15 b that are threaded onto the spindle 9 and act as locknuts opposite each other, in order to fix their positions on the spindle.
- the spindle 9 is supported in and cooperates with the spindle holder 12 so that it can rotate, and advance and retract the stopper piston 7 .
- the spindle 9 is turned until the nut 15 a lying opposite the piston tube 3 engages the stop 13 . In this way, the motion path of the spindle 9 and thus the motion path of the stopper piston 7 in the piston tube 3 may be limited.
- the end position of the stopper piston 7 , FIG. 1C relative to the formwork 2 can be fixed in a simple and uncomplicated way by positioning the nuts 15 a , 15 b on the spindle 9
- the filling port tube 4 comprises on its free end a coupling 16 constructed as a quick connect coupling, to which a concrete feed line or hose, not shown, can be attached for introducing flowable concrete into the filling connector 1 .
- FIG. 1A illustrates the stopper piston 7 arranged in its starting position on the free end 8 of the piston tube 3 .
- Flow of concrete through the filling port tube 4 is introduced into the formwork 2 in an unimpaired way through the piston tube 3 and the opening 6 of the formwork element 5 .
- the direction of flow of concrete is represented by the arrows 17 in the filling port tube 4 .
- a passage or opening 18 formed at the intersection of tubes 3 and 4 is at a maximum size in the position of stopper piston 7 in FIG. 1A whereby the greatest possible concrete flow is guaranteed.
- FIG. 1B illustrates the stopper piston 7 moved in the direction towards the formwork 2 .
- the opening 18 formed between the piston tube 3 and the filling port tube 4 is partially closed by the stopper piston 7 .
- Stopper piston sidewall 19 projects into the opening 18 , so that concrete flow is reduced. Because the stopper piston 7 is longer than the greatest extent of the opening 18 , flow of concrete in the piston tube 3 in the direction of the free end 8 can be prevented, but concrete may still be forced into the formwork 2 .
- FIG. 1C illustrates the completion of the process of filling the formwork 2 .
- the stopper piston 7 has been moved in the piston tube 3 so far forward that its end wall 20 forms a flush seal with the inside surface 5 a of the formwork element 5 .
- the passage or opening 18 between the piston tube 3 and the filling port tube 4 is now completely closed so that concrete cannot flow through the filling connector 1 into the formwork 2 .
- any concrete remaining in the piston tube 3 is pressed into the formwork 2 .
- FIG. 1C also illustrates that the nut 15 a presses against or is in contact with the stop 13 of the adjustment device 14 .
- the motion path of the stopper piston 7 is limited and its end position is defined uniquely so that the end wall 20 of the stopper piston 7 forms a flush seal with the inside surface 5 a of the formwork element 5 .
- a continuous concrete surface flush with the formwork is created within the formwork element 5 . Therefore, in the concrete part to be produced, there are no visible traces of the stopper piston 7 or the point of introduction of the concrete.
- FIGS. 2A through 2C also illustrate that the piston tube 3 forms a seal that is flush with the inside surface 5 a of the formwork element 5 .
- the opening 6 of the formwork element 5 has a diameter that corresponds substantially to the outer diameter of the piston tube 3 .
- the piston tube 3 is connected essentially at a right angle to the formwork element 5 and, preferably, welded to the formwork element. It is also important that the filling port tube 4 be fixed to the piston tube 3 adjacent to or in the area of the formwork 2 .
- the filling port tube 4 is arranged so that, between the side of the filling port tube 4 close to the formwork 5 and the end 3 a of the piston tube 3 there is enough projecting length of the piston tube 3 so that the piston tube 3 can be pushed flush with the formwork into the opening 6 of the formwork element 5 and a seam or weld bead can be formed on the piston tube 3 between the outside surface of the formwork element 5 and the filling port tube 4 .
- FIG. 2C illustrates that the adjustment device 14 can be adjusted such that the end wall 20 of the stopper piston 7 projects somewhat past the end 3 a of the piston tube 3 and the formwork surface 5 a , so that the stopper piston 7 is pressed into still fluid concrete in the formwork 2 .
- This may be useful under certain conditions, for example, when indicia related to the concrete filling is to be intentionally provided in the final concrete part.
- FIG. 3 shows an embodiment of the filling connector 1 , which is not welded to the formwork 2 . Instead, a flange 21 is provided on the end of the piston tube 3 close to the formwork and is held in a receptacle or connector holder 22 on the outside of the formwork element 5 .
- the holder 22 which is realized in the example shown by spaced apart pins 23 , guarantees a reliable and precisely fitting positioning of the filling connector 1 on the formwork 2 .
- the holder 22 including the pins 23 and the flange 21 must be suitably adapted to each other.
- the end of the piston tube 3 projects beyond the flange 21 .
- the opening 6 of the formwork element 5 may be slightly larger than the outer diameter of the piston tube 3 .
- the piston tube 3 is inserted into the opening 6 of the formwork element 5 which produces good fixing and exact positioning of the filling connector 1 on the formwork 2 .
- the length of the piston tube 3 which projects past the flange 21 corresponds in this case to the thickness of the formwork element 5 .
- the flange 21 may be arranged flush with the end of the piston tube 3 .
- the inner diameter of the piston tube 3 then corresponds exactly to the diameter of the opening 6 of the formwork element 5 .
- This disadvantage is prevented by exact fixing of the filling connector 1 on the formwork 2 , especially by robust and precise attachment of the flange 21 in the holder or receptacle 22 .
- FIGS. 4A And 4B show a filling connector 1 from the inside surface 5 a of the formwork element 5 .
- the filling connector 1 includes a stopper piston 7 that has a modified wall 20 constructed, for example, to receive a die plate or punch 24
- the die plate 24 can also include, as in the shown example in FIG. 4B , a number code in addition to the manufacturing date, for example. In this way, it is possible to characterize the final concrete part to be created, for example, with suitable indicia, such as the production year or the production date.
- the die plate 24 is preferably disposed on piston 7 by insertion into a recess in the end wall 20 and is arranged so that it is flush with an edge 25 of the end wall 20 , FIG. 4B . Through such an arrangement, the die plate 24 does not effect or require adjustment of the stopper piston 7 , because the outer dimensions of the piston do not change.
- the filling connector 1 described hereinbefore is believed to be understood by those of ordinary skill in the art based on the foregoing description and viewing the accompanying drawings. Conventional engineering materials and practices may be used to fabricate the connector 1 and carry out its intended use.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
Abstract
A connector for pouring concrete into concrete formworks includes a piston tube and a filling port tube interconnected with each other and extending at an acute angle with respect to each other. The piston tube is mounted on the formwork or on a flange mountable on the formwork whereby a stopper piston axially movable in the piston tube may form a flush seal on an inside surface of a formwork element. A control unit including a spindle moves the stopper piston to close off a passage between the filling port tube and the piston tube. A quick connect coupling is supported on the filling port tube for connection to a concrete feed line.
Description
- In the production of concrete parts, especially outer walls of buildings, formwork systems are known which comprise two formwork elements running parallel. For filling such formworks, various methods are known. For example, conventional concrete is introduced from above into the formwork, so that the concrete falls in free fall into the interior of the formwork. The concrete then fills the formwork until it reaches the top edge of the formwork elements. Such filling is preferably performed for vertically oriented building walls.
- Alternatively, the concrete is pumped into the formwork through filling connections in a side formwork element. The filling connections are usually located in the bottom area of the formwork. A connecting port, on which a filling tube can be connected in a pressure tight way, is provided on the formwork, so that the concrete can be pumped with pressure through the port into the formwork. As soon as the concrete in the formwork has hardened, the filling tube is removed from the connecting port. If the concrete has hardened both in the formwork and also in the filling connection, then removal of the formwork is very difficult because an interfering hardened concrete plug remains.
- The present invention provides an improved connector for filling concrete formworks.
- A connector in accordance with the invention for pouring concrete into a formwork comprises a piston tube and a filling port tube which is connected to the piston tube. The piston tube and the filling port tube together form, essentially, a V-shaped filling connector. The piston tube of the filling connector is arranged flush with the formwork at one end of the piston tube. The piston tube includes a movable stopper piston, which has an end wall oriented in the direction of the formwork and which is moved within the interior of the piston tube by a control unit. The stopper piston can be moved in the piston tube so that its end wall closes flush with the formwork on which the piston tube is arranged. The filling port tube is fixed in the area of the formwork at an acute angle to the wall of the piston tube. The connection between the piston tube and the filling port tube is provided such that concrete, which is introduced into the filling port tube, flows into the piston tube in order to be led finally into the formwork.
- After the formwork has been filled completely with concrete, that is, the concrete has been pumped through the filling port tube and the piston tube into the formwork, the stopper piston is moved in the direction of the formwork. The concrete in the piston tube is pressed into the formwork until the end wall of the stopper piston forms a flush seal with the formwork. Thus, no concrete remains in the piston tube of the filling connector. Therefore, after the concrete is dried, no plug is formed on the formwork wall which would prevent removal of the formwork.
- In accordance with another aspect of the invention, a concrete formwork filling connector includes a stopper piston which closes off the filling port tube with its side wall when the stopper piston forms a smooth seal with its end wall with the formwork. In this position, the end wall of the stopper piston is essentially flush with the end of the piston tube of the filling connector. Depending on the size of the piston tube and the opening provided in the formwork for connecting the piston tube of the filling connector, the piston tube either stands on the formwork element of the formwork or projects so far into the formwork element of the formwork until it is flush with the inside surface of the formwork element. As a function of the arrangement of the piston tube on or in the formwork element of the formwork, the end position of the stopper piston is also to be fixed in the piston tube as well as the cross section of the opening in the formwork. According to a preferred arrangement, the stopper piston reaches, in its end position, past the end of the piston tube of the connector. The opening cross section in the formwork is adapted to the inner cross section of the piston tube or to the outer cross section of the piston tube.
- In accordance with a further aspect of the invention, if the stopper piston is to be moved within the piston tube from its starting position in the direction towards the formwork, then the stopper piston extends with its side wall advancing increasingly into the connection point between the filling port tube and the piston tube, so that the size or cross section of a passage formed at the connection between the piston tube and filling port tube is reduced. In this way, through suitable positioning of the stopper piston within the piston tube, the flow of concrete into the formwork can be controlled to provide a predetermined amount or dose. In this way, it is possible also to control the pour rate of concrete into the formwork. The stopper piston can be moved so far in the direction towards the formwork that it completely closes the connection passage cross section or size between the filling port tube and the piston tube. Further inflow of concrete into the piston tube may then be prevented.
- If the stopper piston is moved even farther in the direction of the formwork, for a closed filling port, the residual concrete still in the piston tube is pressed into the formwork. Only when the stopper piston has reached its end position, that is, forming a flush seal with an inside surface of the formwork element of the formwork, is the movement of the stopper piston complete.
- Accordingly, not only can the concrete flow be controlled to provide a finite dose by the filling connector according to the invention, the filling connector is simultaneously blocked flush with the formwork element, which is formed in the formwork, after stopping the flow. In this way, a residual concrete connecting piece, also called a plug, does not remain on the hardened concrete element, or part and which would make removing the formwork more difficult, especially for the production of exposed concrete surfaces. In the scope of the invention the filling connector according to the invention has proven to be very advantageous. Due to the formwork filling provided by the stopper piston to be flush with the inside surface of the formwork element, only barely visible traces of the connector are to be detected on the hardened concrete.
- In accordance with yet another aspect of the invention, a connector for filling concrete formwork is provided with a stopper piston movable past the free end of the piston tube, in order to intentionally leave, for example, a shape in the concrete body to be created. This is advantageous especially when the end wall of the stopper piston has an exchangeable end surface that comprises, for example, a punch or a die plate, on which indicia, such as for example, the production date of the concrete part, can be stamped. Other information can also be stamped into the concrete part, such as the name of the manufacturing company or the composition of the concrete.
- In one preferred embodiment of the invention, a control unit is provided for moving the stopper piston within the piston tube comprising a spindle which can be driven rotatably either by hand, in that a hand crank is attached at the free end of the spindle, or by a motor, in that such motor is connected directly or via gearing to the spindle. The movement of the stopper piston in the piston tube can then be automated, so that the flow rate of concrete can be regulated automatically. Several filling connectors in one formwork can be controlled centrally. For a motive drive of the spindle, adjustments of the position of the stopper piston can also be regulated by means of a central control, for example, in the form of software. For a mechanical adjustment of the stopper piston, catches can be provided on the spindle, which can be fixed such that further rotation past the catch is not possible.
- In another preferred embodiment, the filling port tube of the filling connector has a coupling on its free end. The coupling is used for connecting concrete feed lines, or hoses, through which concrete is pumped to the filling connector. Preferably, these couplings are provided as quick connect couplings in order to allow quick coupling and decoupling of the feed lines. The quick connect couplings can be exchangeable, so that they always correspond to coupling pieces of various manufacturers and different systems. In this way, the filling connector can be adapted to the available quick connect coupling of the appropriate feed line. A coupling which is constructed as a quarter turn fastener, has proven to be advantageous whereby the feed line can be coupled very easily to the filling connector.
- The filling connector according to the invention has the additional advantage that it is possible, due to the closure of the filling port and the quick removal of the feed line from the filling connector through the quick connect coupling, to clean the filling port tube after filling the formwork. For this purpose, the filling port tube is flushed with water until all of the concrete in the filling port tube is removed. This process is usually performed when the non hardened fresh concrete has converted into young concrete, that is, it has hardened far enough that, for example, the formwork can be removed, but the young concrete has not hardened completely. Because the cleaning of the filling connector is simple, the handling of the connector as a whole is significantly improved. Of course, the stopper piston must seal the filling port during the cleaning to the extent that the injected water does not reach into the formwork.
- In another preferred embodiment of the invention, a seal is provided between the stopper piston and the piston tube, so that no concrete can flow between the stopper piston and the piston tube, which would lead to damage to the filling connector. Preferably, the seal between the stopper piston and the piston tube is constructed as an amorphous seal. For a piston which is fit into the piston tube with very tight tolerances, the amorphous seal can be realized by providing a grease film. The grease film also supports the sliding movement of the piston in the piston tube, so that the piston is supported and seizing is prevented. In addition, thanks to the sealing grease film, it is guaranteed that the concrete flowing through the piston tube does not remain adhered to the inner wall of the piston tube.
- The present invention also provides a filling connector which is detachable from or fixed to the formwork. Preferably, for a detachable connection, the filling connector is flanged to the formwork. A flange is provided at the end of the piston tube which is guided or inserted into a receptacle in the formwork, so that the filling connector is held securely and reliably on the formwork. This embodiment offers the advantage that the filling connector can be completely removed from the formwork. Moreover, if there is a defect in the filling connector, it can simply be replaced by a new one. In addition, the formwork element can be more easily moved about and stored if the filling connector can be removed after the production of the concrete parts. However, care must be taken in attaching the filling connector that the flange of the filling connector is held securely in its receptacle. Still further, it is important to adjust the stopper piston so that the piston assumes the desired position flush with the formwork in its maximum excursion. According to the arrangement of the piston tube on the formwork (sealed with the inside or the outside of the formwork element of the formwork), the stopper piston must be moved so far that it projects past the end of the piston tube or forms a flush seal with it.
- The filling connector may also be welded to the formwork, which represents a durable, reliable, and robust connection. The proper connection of the filling connector and formwork can be realized in advance in the manufacturing plant, just like the fixing of the end position of the stopper piston. For on site assembly, no additional work is necessary. Readjustment of the motion path of the stopper piston can usually be eliminated. Thus, only the feed line must be connected to the filling port tube.
- In a preferred embodiment of the invention, the piston tube and the stopper piston have a cylindrical construction. The terms tube (piston tube and filling port tube) and piston (stopper piston) are understood in the sense of the application as general terms, so that they are not limited to cylindrical constructions. Instead, both the tubes and also the piston may have nearly arbitrary cross sections. However, they must be fitted to each other. It is also possible to use square cross section tubes, in which a square stopper piston can move, for example.
- At least part of the filling port tube preferably can have a cylindrical cross section, so that the feed lines usually constructed with a round cross section can be connected in a simple way and without additional adapters.
- Preferred embodiments are described further in detail herein with reference to the drawing figures.
-
FIGS. 1A through 1C are cutaway perspective views illustrating a concrete filling connector in accordance with the invention; -
FIGS. 2A through 2C are longitudinal central section views of the connector shown inFIGS. 1A through 1C with the stopper piston in various positions corresponding to the positions inFIGS. 1A through 1C , respectively; -
FIG. 3 is a cutaway perspective view of an alternate embodiment of the invention; and -
FIGS. 4A and 4B are cutaway perspective views illustrating a modified stopper piston of the filling connector including an exchangeable end face insert for the stopper piston. -
FIGS. 1A through 1C show a fillingconnector 1, which is connected rigidly to aformwork 2. The essentially V shaped fillingconnector 1 comprises apiston tube 3 and a fillingport tube 4 fixed to the piston tube so that a one piece outer structure of the fillingconnector 1 is formed. Thepiston tube 3 is welded to aformwork element 5 of theformwork 2, so that a durable connection between the piston tube and formwork is formed. Thepiston tube 3 is positioned at an angle of ninety degrees, that is, perpendicular to theformwork 2. Thepiston tube 3 is connected with theformwork element 5 such that theopen end 3 a of thepiston tube 3 is flush with and forms a flush seal with theinside surface 5 a of theformwork element 5. Theformwork element 5 has anopening 6, whose diameter corresponds to the outer diameter of thepiston tube 3. The fillingport tube 4 is fixed to thepiston tube 3 at an acute angle adjacent to or in the area of theformwork 2. In the example shown, the fillingport tube 4 is arranged at the side of thepiston tube 3 at an angle of about thirty degrees. - A
stopper piston 7 is supported so that it can move in thepiston tube 3. Thestopper piston 7 can be moved in a linear motion from therear end 8 of thepiston tube 3 in the direction towards theformwork 2, that is, in the direction of thepiston tube end 3 a. The linear motion of thestopper piston 7 is realized by acontrol unit 10 comprising arotatable spindle 9. Thespindle 9 is connected on one end to a hand crank 11, with which an operator can activate the spindle by hand. Alternatively, a motor can also be attached directly or via gearing to the free end of thespindle 9, so that thespindle 9 is turned by such motor. - At the
free end 8 of thepiston tube 3 there is aspindle holder 12, at which astop 13 is formed. Thestop 13 is part of anadjustment device 14, which also includes twonuts spindle 9 and act as locknuts opposite each other, in order to fix their positions on the spindle. Thespindle 9, is supported in and cooperates with thespindle holder 12 so that it can rotate, and advance and retract thestopper piston 7. Thespindle 9 is turned until thenut 15 a lying opposite thepiston tube 3 engages thestop 13. In this way, the motion path of thespindle 9 and thus the motion path of thestopper piston 7 in thepiston tube 3 may be limited. The end position of thestopper piston 7,FIG. 1C , relative to theformwork 2 can be fixed in a simple and uncomplicated way by positioning the nuts 15 a, 15 b on thespindle 9. - The filling
port tube 4 comprises on its free end acoupling 16 constructed as a quick connect coupling, to which a concrete feed line or hose, not shown, can be attached for introducing flowable concrete into the fillingconnector 1.FIG. 1A illustrates thestopper piston 7 arranged in its starting position on thefree end 8 of thepiston tube 3. Flow of concrete through the fillingport tube 4 is introduced into theformwork 2 in an unimpaired way through thepiston tube 3 and theopening 6 of theformwork element 5. The direction of flow of concrete is represented by thearrows 17 in the fillingport tube 4. A passage oropening 18 formed at the intersection oftubes stopper piston 7 inFIG. 1A whereby the greatest possible concrete flow is guaranteed. -
FIG. 1B illustrates thestopper piston 7 moved in the direction towards theformwork 2. In this position, theopening 18 formed between thepiston tube 3 and the fillingport tube 4 is partially closed by thestopper piston 7. Stopper piston sidewall 19 projects into theopening 18, so that concrete flow is reduced. Because thestopper piston 7 is longer than the greatest extent of theopening 18, flow of concrete in thepiston tube 3 in the direction of thefree end 8 can be prevented, but concrete may still be forced into theformwork 2. -
FIG. 1C illustrates the completion of the process of filling theformwork 2. Thestopper piston 7 has been moved in thepiston tube 3 so far forward that itsend wall 20 forms a flush seal with theinside surface 5 a of theformwork element 5. The passage oropening 18 between thepiston tube 3 and the fillingport tube 4 is now completely closed so that concrete cannot flow through the fillingconnector 1 into theformwork 2. Simultaneously, with the movement of thestopper piston 7 in the direction of thepiston tube end 3 a, any concrete remaining in thepiston tube 3 is pressed into theformwork 2. -
FIG. 1C also illustrates that thenut 15 a presses against or is in contact with thestop 13 of theadjustment device 14. In this way, the motion path of thestopper piston 7 is limited and its end position is defined uniquely so that theend wall 20 of thestopper piston 7 forms a flush seal with theinside surface 5 a of theformwork element 5. In this way also, a continuous concrete surface flush with the formwork is created within theformwork element 5. Therefore, in the concrete part to be produced, there are no visible traces of thestopper piston 7 or the point of introduction of the concrete. - In the section views of
FIGS. 2A through 2C , the passage oropening 18, which is formed between thepiston tube 3 and the fillingport tube 4, can be seen clearly. The farther thestopper piston 7 is moved in thepiston tube 3 in the direction of theformwork element 5, the smaller theopening 18. Accordingly, a simple way of controlling flow of concrete is provided without having to provide additional devices. -
FIGS. 2A through 2C also illustrate that thepiston tube 3 forms a seal that is flush with theinside surface 5 a of theformwork element 5. Theopening 6 of theformwork element 5 has a diameter that corresponds substantially to the outer diameter of thepiston tube 3. Thepiston tube 3 is connected essentially at a right angle to theformwork element 5 and, preferably, welded to the formwork element. It is also important that the fillingport tube 4 be fixed to thepiston tube 3 adjacent to or in the area of theformwork 2. The fillingport tube 4 is arranged so that, between the side of the fillingport tube 4 close to theformwork 5 and theend 3 a of thepiston tube 3 there is enough projecting length of thepiston tube 3 so that thepiston tube 3 can be pushed flush with the formwork into theopening 6 of theformwork element 5 and a seam or weld bead can be formed on thepiston tube 3 between the outside surface of theformwork element 5 and the fillingport tube 4. -
FIG. 2C illustrates that theadjustment device 14 can be adjusted such that theend wall 20 of thestopper piston 7 projects somewhat past theend 3 a of thepiston tube 3 and theformwork surface 5 a, so that thestopper piston 7 is pressed into still fluid concrete in theformwork 2. This may be useful under certain conditions, for example, when indicia related to the concrete filling is to be intentionally provided in the final concrete part. -
FIG. 3 shows an embodiment of the fillingconnector 1, which is not welded to theformwork 2. Instead, aflange 21 is provided on the end of thepiston tube 3 close to the formwork and is held in a receptacle orconnector holder 22 on the outside of theformwork element 5. Theholder 22, which is realized in the example shown by spaced apart pins 23, guarantees a reliable and precisely fitting positioning of the fillingconnector 1 on theformwork 2. Theholder 22 including thepins 23 and theflange 21 must be suitably adapted to each other. - In general, two modifications to the
connector 1 are possible. In the first modification, the end of thepiston tube 3 projects beyond theflange 21. In this case, theopening 6 of theformwork element 5 may be slightly larger than the outer diameter of thepiston tube 3. Thepiston tube 3 is inserted into theopening 6 of theformwork element 5 which produces good fixing and exact positioning of the fillingconnector 1 on theformwork 2. The length of thepiston tube 3 which projects past theflange 21 corresponds in this case to the thickness of theformwork element 5. - In a second modification, the
flange 21 may be arranged flush with the end of thepiston tube 3. The inner diameter of thepiston tube 3 then corresponds exactly to the diameter of theopening 6 of theformwork element 5. Here, the additional support by the piston tube in the positioning of the filling connection is eliminated. This disadvantage, however, is prevented by exact fixing of the fillingconnector 1 on theformwork 2, especially by robust and precise attachment of theflange 21 in the holder orreceptacle 22. -
FIGS. 4A And 4B show a fillingconnector 1 from theinside surface 5 a of theformwork element 5. The fillingconnector 1 includes astopper piston 7 that has a modifiedwall 20 constructed, for example, to receive a die plate or punch 24 Thedie plate 24 can also include, as in the shown example inFIG. 4B , a number code in addition to the manufacturing date, for example. In this way, it is possible to characterize the final concrete part to be created, for example, with suitable indicia, such as the production year or the production date. Thedie plate 24 is preferably disposed onpiston 7 by insertion into a recess in theend wall 20 and is arranged so that it is flush with an edge 25 of theend wall 20,FIG. 4B . Through such an arrangement, thedie plate 24 does not effect or require adjustment of thestopper piston 7, because the outer dimensions of the piston do not change. - The filling
connector 1 described hereinbefore is believed to be understood by those of ordinary skill in the art based on the foregoing description and viewing the accompanying drawings. Conventional engineering materials and practices may be used to fabricate theconnector 1 and carry out its intended use. - Although preferred embodiments of the invention have been described in detail herein, those skilled in the art will recognize that various substitutions and modifications may be made without departing from the scope and spirit of the appended claims.
Claims (20)
1. A concrete filling connector for connection to a formwork for pouring concrete into said formwork, said connector comprising:
a piston tube having one end arranged to form a flush seal on a formwork element;
a stopper piston movable within said piston tube and having an end wall facing said formwork;
a control unit for moving said stopper piston within said piston tube;
a filling port tube connected to said piston tube adjacent said one end and extending at an acute angle with respect to said piston tube such that concrete poured into said filling port tube may flow through said piston tube and into said formwork; and
said stopper piston is movable within said piston tube whereby said end wall of said stopper piston may form a flush seal with a surface of said formwork.
2. The connector set forth in claim 1 wherein:
said stopper piston includes a sidewall which is operable to close an opening between said piston tube and said filling port tube when said end wall forms said flush seal.
3. The connector set forth in claim 1 wherein:
said control unit includes an adjustment device for adjusting a limit position of said stopper piston in said piston tube such that said stopper piston may move past said one end of said piston tube.
4. The connector set forth in claim 1 wherein:
said filling port tube includes a quick connect coupling disposed on one end of said filling port tube for coupling and decoupling a concrete feed line.
5. The connector set forth in claim 1 wherein:
said connector includes a flange for releasably connecting said connector to said formwork.
6. The connector set forth in claim 1 wherein:
said connector is fixed to said formwork by welding said piston tube to said formwork.
7. The connector set forth in claim 1 wherein:
said piston tube and said stopper piston have a cylindrical cross sectional shape.
8. The connector set forth in claim 7 wherein:
said filling port tube has a cylindrical cross sectional shape.
9. The connector set forth in claim 1 wherein:
said control unit includes spindle rotatable to advance said piston tube, said spindle being driven by one of a manual drive and a motor drive.
10. The connector set forth in claim 1 including:
an amorphous seal formed by a grease film disposed between said stopper piston and said piston tube.
11. The connector set forth in claim 1 wherein:
said end wall of said stopper piston includes an exchangeable die plate forming an end surface of said stopper piston.
12. A concrete filling connector for connection to a formwork for pouring concrete into said formwork, said connector comprising:
a piston tube having one end arranged to be directly adjacent a formwork element;
a stopper piston movable within said piston tube and having an end wall facing said formwork;
a control unit for moving said stopper piston within said piston tube;
a filling port tube connected to said piston tube adjacent said one end and extending at an acute angle with respect to said piston tube;
an opening formed between said piston tube and said filling port tube such that concrete poured into said filling port tube may flow through said piston tube and into said formwork; and
said stopper piston includes a sidewall which is operable to close said opening between said piston tube and said filling port tube.
13. The connector set forth in claim 12 wherein:
said control unit includes an adjustment device for adjusting a limit position of said stopper piston in said piston tube such that said stopper piston may move past said one end of said piston tube.
14. The connector set forth in claim 12 wherein:
said connector includes a flange for releasably connecting said connector to said formwork.
15. The connector set forth in claim 12 wherein:
said connector is fixed to said formwork by welding said piston tube to said formwork.
16. The connector set forth in claim 12 wherein:
said end wall of said stopper piston includes an exchangeable die plate forming an end surface of said stopper piston.
17. A concrete filling connector for connection to a formwork for pouring concrete into said formwork, said connector comprising:
a piston tube having one end arranged to form a flush seal on a formwork element;
a stopper piston movable within said piston tube and having an end wall facing said formwork;
a control unit including a spindle rotatable for moving said stopper piston within said piston tube, said control unit including an adjustment device for adjusting a limit position of said stopper piston in said piston tube;
a filling port tube connected to said piston tube adjacent said one end and extending at an angle with respect to said piston tube such that concrete poured into said filling port tube may flow through an opening between said piston tube and said filling port tube and through said piston tube into said formwork; and
said stopper piston is movable within said piston tube to control the flow of concrete to said formwork.
18. The connector set forth in claim 17 wherein:
said connector includes a flange for releasably connecting said connector to said formwork.
19. The connector set forth in claim 17 wherein:
said piston tube, said stopper piston and said filling port tube each have a cylindrical cross sectional shape.
20. The connector set forth in claim 17 wherein:
said end wall of said stopper piston includes an exchangeable die plate forming an end surface of said stopper piston.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006053552A DE102006053552B3 (en) | 2006-11-14 | 2006-11-14 | Filling connector for formwork, has filler neck connected with wall of piston pipe in formwork area below spike angle such that concrete filled in neck flows into formwork via pipe, and front wall closing formwork in formwork-smooth manner |
DE102006053552.9 | 2006-11-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20080110330A1 true US20080110330A1 (en) | 2008-05-15 |
Family
ID=38885266
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/855,783 Abandoned US20080110330A1 (en) | 2006-11-14 | 2007-09-14 | Connector for Filling Concrete Formworks |
Country Status (7)
Country | Link |
---|---|
US (1) | US20080110330A1 (en) |
EP (1) | EP1923527A1 (en) |
CA (1) | CA2610544A1 (en) |
DE (1) | DE102006053552B3 (en) |
MX (1) | MX2007014244A (en) |
RU (1) | RU2007141762A (en) |
ZA (1) | ZA200708875B (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100164140A1 (en) * | 2007-04-23 | 2010-07-01 | Andreas Reymann | Battery formwork for the vertical manufacturing of planar precast concrete parts |
WO2012110526A1 (en) | 2011-02-15 | 2012-08-23 | Universiteit Gent | Automatic connection valve for concrete pumping |
ITMI20130377A1 (en) * | 2013-03-12 | 2014-09-13 | Cifa Spa | VALVE FOR FORMWORK AND FORMWORK PROVIDED WITH THIS VALVE |
WO2016112332A1 (en) * | 2015-01-08 | 2016-07-14 | Marion Mixers, Inc. | Zero pocket valve |
CN110344596A (en) * | 2019-08-08 | 2019-10-18 | 中国矿业大学 | A kind of enhanced pneumatic concrete transportation system of counnter attack gas |
CN111395765A (en) * | 2020-03-30 | 2020-07-10 | 南京工程学院 | Prefabricated concrete structure grouting adapter with plugging function and construction method thereof |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
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AT507554B1 (en) | 2008-12-22 | 2010-06-15 | Betonwerk Rieder Gmbh | FORMWORK FOR VERTICAL MANUFACTURING OF FLAT REPRODUCTIVE PARTS |
NL1037267C2 (en) | 2009-09-10 | 2011-03-14 | Romein Beton B V | LOCKABLE CONNECTION PIECE FOR A TEMPLATE AND A TIME FITTED WITH A LOCKABLE CONNECTION PIECE. |
DE102011007689A1 (en) * | 2011-04-19 | 2012-10-25 | Putzmeister Engineering Gmbh | Arrangement and method for introducing thick material into a formwork and control valve for this purpose |
CN107060342B (en) * | 2017-05-17 | 2019-04-09 | 武汉盛大长青建材有限公司 | A kind of secure localization adjustment device for concreting vehicle hose |
CN108724455B (en) * | 2018-08-07 | 2023-12-19 | 浙江巨龙管业科技有限公司 | Adjustable prestress steel cylinder concrete pipe die |
CN112681610A (en) * | 2020-12-24 | 2021-04-20 | 上海建工二建集团有限公司 | Construction method of special-shaped concrete column |
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US2089149A (en) * | 1934-08-17 | 1937-08-03 | Chain Belt Co | Plastic concrete induction apparatus for tunnel forms |
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DE684422C (en) * | 1936-06-30 | 1939-11-28 | Gerhard Rost | Device for pumping concrete into inaccessible spaces |
DE3732894A1 (en) * | 1987-08-26 | 1989-03-09 | Gebhardt & Koenig Gesteins Und | Method and arrangement for producing fabric-reinforced supports or slim, load-bearing construction members |
JP2859546B2 (en) * | 1994-12-12 | 1999-02-17 | 株式会社金澤製作所 | Switching valve |
JP2859547B2 (en) * | 1994-12-12 | 1999-02-17 | 株式会社金澤製作所 | Switching valve |
JPH112339A (en) * | 1997-06-11 | 1999-01-06 | Shimizu Corp | Valve of piping for pacing concrete |
DE10034040A1 (en) * | 2000-07-13 | 2002-03-14 | Zueblin Ag | Tunneling shutter car fixed-point distributor comprises arm pivoting extensibly radial to arm parallel to tunnel axis on ring with concreting pipes connecting to formwork pipes. |
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2006
- 2006-11-14 DE DE102006053552A patent/DE102006053552B3/en not_active Expired - Fee Related
-
2007
- 2007-09-14 US US11/855,783 patent/US20080110330A1/en not_active Abandoned
- 2007-10-11 EP EP07033513A patent/EP1923527A1/en not_active Withdrawn
- 2007-10-16 ZA ZA200708875A patent/ZA200708875B/en unknown
- 2007-11-13 RU RU2007141762/03A patent/RU2007141762A/en not_active Application Discontinuation
- 2007-11-14 CA CA002610544A patent/CA2610544A1/en not_active Abandoned
- 2007-11-14 MX MX2007014244A patent/MX2007014244A/en not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US2089149A (en) * | 1934-08-17 | 1937-08-03 | Chain Belt Co | Plastic concrete induction apparatus for tunnel forms |
US3682575A (en) * | 1970-12-10 | 1972-08-08 | Karl Guddal | Concrete pump |
US4959003A (en) * | 1987-02-23 | 1990-09-25 | Kvm Industrimaskiner A/S | Device for die-casting of concrete goods such as block stones in a cellular mould |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100164140A1 (en) * | 2007-04-23 | 2010-07-01 | Andreas Reymann | Battery formwork for the vertical manufacturing of planar precast concrete parts |
WO2012110526A1 (en) | 2011-02-15 | 2012-08-23 | Universiteit Gent | Automatic connection valve for concrete pumping |
ITMI20130377A1 (en) * | 2013-03-12 | 2014-09-13 | Cifa Spa | VALVE FOR FORMWORK AND FORMWORK PROVIDED WITH THIS VALVE |
WO2014141083A2 (en) | 2013-03-12 | 2014-09-18 | Cifa Spa | Valve for formworks and formworks equipped with said valve |
WO2014141083A3 (en) * | 2013-03-12 | 2015-07-02 | Cifa Spa | Valve for formworks and formworks equipped with said valve |
WO2016112332A1 (en) * | 2015-01-08 | 2016-07-14 | Marion Mixers, Inc. | Zero pocket valve |
CN110344596A (en) * | 2019-08-08 | 2019-10-18 | 中国矿业大学 | A kind of enhanced pneumatic concrete transportation system of counnter attack gas |
CN111395765A (en) * | 2020-03-30 | 2020-07-10 | 南京工程学院 | Prefabricated concrete structure grouting adapter with plugging function and construction method thereof |
Also Published As
Publication number | Publication date |
---|---|
DE102006053552B3 (en) | 2008-02-07 |
MX2007014244A (en) | 2009-02-11 |
CA2610544A1 (en) | 2008-05-14 |
RU2007141762A (en) | 2009-05-20 |
ZA200708875B (en) | 2008-10-29 |
EP1923527A1 (en) | 2008-05-21 |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: RATEC LLC, FLORIDA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:REYMANN, ANDREAS;REEL/FRAME:019938/0780 Effective date: 20070705 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |