US3593983A - Device for holding fittings on concrete formwork - Google Patents

Device for holding fittings on concrete formwork Download PDF

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Publication number
US3593983A
US3593983A US813972A US3593983DA US3593983A US 3593983 A US3593983 A US 3593983A US 813972 A US813972 A US 813972A US 3593983D A US3593983D A US 3593983DA US 3593983 A US3593983 A US 3593983A
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United States
Prior art keywords
device defined
connecting piece
tappet
bore
closing member
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Expired - Lifetime
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US813972A
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English (en)
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Zoltan Csenyi
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Individual
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Individual
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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
    • E04G15/00—Forms or shutterings for making openings, cavities, slits, or channels
    • E04G15/06—Forms or shutterings for making openings, cavities, slits, or channels for cavities or channels in walls of floors, e.g. for making chimneys
    • E04G15/061—Non-reusable forms
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K13/00—Apparatus or processes specially adapted for manufacturing or adjusting assemblages of electric components
    • H05K13/08—Monitoring manufacture of assemblages
    • H05K13/089—Calibration, teaching or correction of mechanical systems, e.g. of the mounting head

Definitions

  • Evenson Attorney-Karl Ross ABSTRACT A system for mounting cup-shaped holders for fittings to be built into concrete bodies along the internal sur face of concrete formwork.
  • the device comprises an opening in the mounting shell in which a valve body is frictionally received, the valve body being thrust in place by a plunger and tappet on a device applied over the opening.
  • the device may be connected with a suction pump by a hose or the like or may employ a piston pump for operating the tappet and providing suction.
  • This invention relates to a device for holding builtin fittings on shuttering or formwork used for the erection of concrete buildings or parts thereof, having a vacuum adhesion box in the form of a capsule or bell which is provided with an air evacuation valve and with means adapted to generate a vacuum in the adhesion box applied to the shuttering.
  • Vacuum adhesion boxes of this kind and for this purpose are known. After being placed on the shuttering, they are evacuated with the aid of a vacuum pump so that they adhere for a considerable period and at least till the concrete behind the shuttering has hardened. Installation parts which are to be concreted in, such as electric switchboxes, shaped cores or bodies, equipment boxes or wooden inset boxes, are pushed on to these vacuum adhesion boxes. They then remain bedded in the concrete, while the vacuum adhesion boxes can be taken out for further use upon removal of the shuttering.
  • this disadvantage is overcome by providing the air evacuation valve of the adhesion box-, which is nondeforrnable and equipped with a sealing ring, with a valve noule and a closing body that can be pressed friction tight into the nozzle, while the air evacuation valve is equipped with a connecting piece which can be fixed thereon airtight, this connecting piece communication with a vacuum source and having supported in it an axially displaceable tappet coaxial with the valve nozzle, the arrangement being such that when the piston moves beyond the normal inner end of its stroke the tappet strikes against the closing body and pushes same into the valve nozzle.
  • FIG. 1 shows an axial section of a vacuum adhesion box with a piston-type vacuum pump attached, the piston being in the inner limiting position of the normal piston stroke;
  • FIG. 2 is an axial section corresponding to FIG. I but with the piston of the vacuum pump in a position beyond the normal inner end of the stroke;
  • FIG. 3 illustrates a second embodiment, likewise in axial section
  • FIG. 4 is an axial section of the device according to the third embodiment.
  • FIG. 5 is an axial section through the vacuum adhesion box or shell and a utility housing fitted thereover and embedded in the concrete body prior to removal of the formwork.
  • valve body 3 denotes a valve body that has threaded stud 3a passing through the bottom of adhesion box 1.
  • Valve body 3 is fixed in place by means of a nut 4 screwed onto threaded stud 3a.
  • a sealing disc 5 interposed between valve body 3 and the bottom of the box ensures an airtight joint between the valve .body and the box.
  • a bush 6 of elastically deformable material which serves as a valve nozzle, andwhich may be made for instance from a piece of hose.
  • a chamber 7 Adjacent the bush 6 and coaxial therewith is a chamber 7 which contains a closing body in the form of a ball 8, for instance a steel ball, whose diameter is greater than the bore 6a of the sealing bush 6.
  • Numeral 9 designates a bore coaxial with chamber 7 and bush 6 through which bore chamber 7 and ball 8 are accessible from the outside. Sealing bush 6 is secured in place by an insert I0 fitted in the threaded stud 3a and provided with an axial bore 10a.
  • Reference character It designates the cylinder of a pistontype vacuum pump with piston 12, piston rod I3 and handle 14 attached to the latter. At the end opposite the handle the cylinder II fits into a connecting piece 15 whoseforward end, fitted with an internal sealing ring I6, can be pushed onto the valve body 3 of the adhesion box.
  • a tappet I7 is fitted in an axial bore of connecting piece I5 so as to be axially displaceable and is rendered airtight in the bore by a sealing ring 18.
  • the end 17a of said tappet facing the mouth of connecting piece I5 is designed as a stem of reduced diameter which can enter the bore 9 of valve body 3.
  • tappet I7 At the other end tappet I7 is provided with a head 1712 against which one end of a compression spring 19 abuts, while the other end thereof engages the bottom 20 of the bore 21 surrounding the inner end of the pump cylinder.
  • a circlip 22 inserted in groove of tappet 17 serves as a stop for the tappet.
  • valve body of the adhesion box is pushed into the mouth of connecting piece 15 of the vacuum pump.
  • Adhesion box and vacuum pump are now bodily placed at the desired point on one of the inner walls of the shuttering, whereupon piston 12 is pulled back by means of the handle.
  • the nonreturn valve fitted in bore 23 of connecting piece 15 opens, and air is extracted from the box through bores 9, 10a, chamber 7 and bush bore 6a, so that the box is firmly sucked to the shuttering or, in other words, the pressure of the outside atmosphere presses it firmly against the shuttering.
  • the nonretum valve located in bore 23 closes.
  • the bore 9 is of irregular shape at. the end opening into chamber 7, being provided with notches for instance so that the bore cannot be closed by ball 8 during the suction stroke of the pump.
  • an adjustable stop can be provided to prevent piston 12 from being moved beyond its normal inner end position.
  • adhesion box 1, sealing ring 2 and valve body 3 can be taken out of the concreteddn fitting. With the aid of an object such as a nail or a fine screwdriver introduced into bore IOa, the ball 8 can be pushed back into chamber 7. While the box with the valve body may be reused as often as desired, it is advisable to change the sealing ring 2 fitted on the rim of the box from time to time.
  • suitable choice of the hardness of the elastic material used for bush 6 and of the difference of diameter between the ball 8 and the bush bore 6a it is possible to vary the static friction between ball and bush in wide limits and to keep it in all cases in a range that will resist the forces of acceleration produced when the concrete is vibrated.
  • the aforedescribed vacuum adhesion box is not only a suitable holder for electric switchboxes and the like, but may also be used for fixing in situ shuttering components or door and window frames that are to be concreted in.
  • numeral 1 again designates the nondeformable vacuum adhesion box
  • 2 the sealing ring fitted on the rim la of the adhesion box
  • 3 the valve body with the valve nozzle 6 and the nozzle bore 60
  • 8 the closing body
  • 11 the pump cylinder
  • 12 the piston
  • 13 the piston rod
  • 15 the connecting piece
  • 17 the tappet with the inner stem 17a and head 17b
  • 18 the tappet seal
  • 19 the compression spring
  • 20 the bottom of bore 21, 22 the stop of the tappet
  • 23 the bore taking the nonreturn valve (not shown), and 24 the pump suction space.
  • the closing member 8 is designed as a cylindrical plug and provided with an outer collar 80 which comes up against'the shoulder 6b of valve body bore 9 upon insertion of the plug in valve nozzle bore 60.
  • the closing plug 8 is provided with a central blind bore 8b by means of which the plug can be pushed onto the closing stem 17a of tappet 17 with a push-fit.
  • the blind bore 8b of plug 8 which is made of elastically deformable material, goes so deep that only a comparatively thin bridge of material remains, and this can be pierced with a thin, sharp object.
  • nozzle bore 6a is once more smaller than the outside diameter of closing plug 8, the latter undergoes elastic deformation so that a considerable frictional force is produced between closing plug and nozzle bore and prevents the closing plug from being loosened in the nozzle under the influence of the acceleration forces produced during the vibration of the concrete.
  • the thin bottom 8c of the closing plug can be pierced, as already mentioned, with a sharp object, so that air enters the adhesion box and this is released from the shuttering.
  • this embodiment of the invention permits the valve body 3 projecting out of the adhesion box I to be kept very low, and the closing plug 8 to be sunk completely in the valve body, i.e. in its bore 9.
  • Such a low design is a particularly big advantage in prefabricated buildings in which, as is well known, the built-in fittings are bounded by shutteringsurfaces on both sides and have a little height or depth.
  • numeral 1 again designates the vacuum adhesion box with the sealing ring 2 fitted on its rim 1a
  • 3 is the valve body, 6 the valve nozzle with nozzle bore 6a,
  • the connecting piece 15 is not combined with a suction pump as in the two aforcdescribed forms. Instead the suction space 25 of connecting piece 15 is connected by a flexible pipe 26 to a vacuum source, say, a motor-driven vacuum pump. Apart from the suction pump, the handling and action of the device shown in FIG. 4 are the same as for the embodiment illustrated in FIG. 3.
  • the form according to FIG. 4 permits the construction of a particularly low and flat closing device, so that the adhesion box may also be fitted at places particularly difficult of access where hand pumps as described in connection with FIGS. 1 to 3 cannot be used.
  • connection piece 15 In the pipe 26 leading from connecting piece 15 to the vacuum source it is preferable to fit a multiway cock which enables the pipe to be shut off as desired and the suction space 25 of connecting piece 15 connected to the atmosphere for the purpose of facilitating removal of the connecting piece from the valve body. It is also possible, however, to run an electric control lead in parallel to pipe 26 to a relay acting upon the multiway cock, in which case an electric switch would have to be fitted on handle 27.
  • suction space 25 may again be provided for through a valve actuated from the outside.
  • a device for holding built-in fittings on shuttering used for the erection of concrete buildings or parts thereof comprising a capsule or bell-shaped vacuum adhesion box provided with an air evacuation valve and means for generating a vacuum in the adhesion box applied to the shuttering, said valve including a nozzle and a closing member capable of being pressed friction tight thereinto and having allocated to it a connecting piece fixable thereon airtight, a plunger reciprocable relative to said adhesion box and a tappet coaxial with said nozzle and supported axially displaceable and airtight in said connecting piece for introducing said closing member frictionally into said nozzle upon advance of said plunger.
  • valve nozzle is made of elastically deformable material.
  • valve nozzle is formed by an elastically deformable bush adjoining which is formed a chamber accessible through a bore provided in said bush from the outside and containing the closing member.
  • the tappet has an annular groove and a sealing ring received therein, said connecting piece being provided with a central bearing bore receiving said tappet and sealingly engaged by said ring.
  • the tappet is tapered to a thinner stem at one end and at the other end has a head against which abuts one end of a compression spring whose other end engages the bottom of a bore surrounding a pump cylinder slidably receiving said plunges, said plunges being constituted as a pump piston.
  • closing member is provided with a blind bore open towards said plunger and coaxial with said tappet, by means of which bore the closing member can be pushed onto a thin stem of the tappet with a push-fit.
  • the closing member is made of elastically deformable material, the blind hole provided therein going so deep that the bridge of material left can be pierced with a stiff, sharp object.
  • connecting piece is connected by a flexible pipe with a vacuum source, the head of the tappet projecting from the connecting piece and forming said plunger so as to permit actuation by hand.
  • shutoff member is a multiway cock by means of which the flexible pipe can be closed at will and the connecting piece can be connected to the atmosphere for the purpose of admitting air to a suction space formed in said connecting piece.
  • the device defined in claim I further comprising a valve that can be actuated from the outside and fitted in the connecting piece to permit the addition of air to said box.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Operations Research (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Connection Or Junction Boxes (AREA)
  • Building Environments (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Reciprocating Pumps (AREA)
US813972A 1968-05-22 1969-04-07 Device for holding fittings on concrete formwork Expired - Lifetime US3593983A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH779368A CH468546A (de) 1968-05-22 1968-05-22 Verfahren zum Festhalten von Einbaukörpern an Schalungen für die Erstellung von Aussparungen in Betonbauten oder Bauteilen von solchen

Publications (1)

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US3593983A true US3593983A (en) 1971-07-20

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US813972A Expired - Lifetime US3593983A (en) 1968-05-22 1969-04-07 Device for holding fittings on concrete formwork

Country Status (12)

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US (1) US3593983A (xx)
JP (1) JPS4839659B1 (xx)
AT (1) AT288672B (xx)
BE (1) BE733437A (xx)
CH (1) CH468546A (xx)
DE (1) DE1917619A1 (xx)
DK (1) DK120453B (xx)
FR (1) FR2009071A1 (xx)
GB (1) GB1212153A (xx)
NL (1) NL6907843A (xx)
NO (1) NO124281B (xx)
SE (1) SE337669B (xx)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3724835A (en) * 1969-10-25 1973-04-03 Licentia Gmbh Device for temporarily holding articles of different sizes
DE4005514A1 (de) * 1990-02-22 1991-08-29 Fraunhofer Ges Forschung Flexible pneumatische haltevorrichtung zum positionieren und fixieren von werkstuecken
US5080309A (en) * 1990-01-25 1992-01-14 Ivins Kevin W Removably positionable visor apparatus and suction release mechanism
US5617698A (en) * 1995-01-30 1997-04-08 Foamseal, Inc. Clamp for holding wall panel against adhesive
US5984401A (en) * 1997-08-25 1999-11-16 Hannah; James David Panel attachment member and system
US6439559B1 (en) * 2000-12-05 2002-08-27 Bay View Industries, Inc. Vacuum control device for holding a workpiece
US20050103808A1 (en) * 2003-11-14 2005-05-19 Zschiedrich Wilfried E. High Vacuum Disk
US20070216154A1 (en) * 2006-03-03 2007-09-20 Casagrande Charles L Mounting system and methods for attaching accessory components
US20100044538A1 (en) * 2008-08-19 2010-02-25 Fih (Hong Kong) Limited Assembly device for display screen
JP2013223893A (ja) * 2012-04-20 2013-10-31 Toyo Mach & Metal Co Ltd 部品取出装置
US20140251760A1 (en) * 2013-03-11 2014-09-11 Texas Instruments Incorporated Die eject assembly for die bonder
US20160340948A1 (en) * 2015-05-21 2016-11-24 Kyle S. McCullough Suction Cup Child Restraint Lock for Sliding Doors/Windows
EP3324060A1 (en) * 2016-11-16 2018-05-23 Samsung Electronics Co., Ltd. Vacuum suction device and electronic device including the same
US10267453B2 (en) 2006-03-03 2019-04-23 Charles L. Casagrande Mounting system and accessory components
US20200256376A1 (en) * 2019-02-07 2020-08-13 Ten Sheng Assorted Houseware Co., Ltd. Suction cup
US11359664B2 (en) * 2020-01-06 2022-06-14 Lih Yann Industrial Co., Ltd. Suction cup
US11892119B1 (en) * 2023-02-13 2024-02-06 Tilta Inc. Suction-operated device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT381548B (de) * 1983-08-25 1986-10-27 Rund Stahl Bau Gmbh & Co Einrichtung zum voruebergehenden fixieren von einbaukoerpern an einer schalung
CN105328746B (zh) * 2015-11-10 2017-07-28 南兴装备股份有限公司 一种带气锁型独立移动式的真空吸盘和板材吸附装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1801723A (en) * 1930-02-27 1931-04-21 Jr William Clifford Holder or retainer for concrete inserts
US3059952A (en) * 1958-11-05 1962-10-23 Emil A Wittman Device for preventing car doors from opening

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1801723A (en) * 1930-02-27 1931-04-21 Jr William Clifford Holder or retainer for concrete inserts
US3059952A (en) * 1958-11-05 1962-10-23 Emil A Wittman Device for preventing car doors from opening

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3724835A (en) * 1969-10-25 1973-04-03 Licentia Gmbh Device for temporarily holding articles of different sizes
US5080309A (en) * 1990-01-25 1992-01-14 Ivins Kevin W Removably positionable visor apparatus and suction release mechanism
DE4005514A1 (de) * 1990-02-22 1991-08-29 Fraunhofer Ges Forschung Flexible pneumatische haltevorrichtung zum positionieren und fixieren von werkstuecken
US5617698A (en) * 1995-01-30 1997-04-08 Foamseal, Inc. Clamp for holding wall panel against adhesive
US5984401A (en) * 1997-08-25 1999-11-16 Hannah; James David Panel attachment member and system
US6439559B1 (en) * 2000-12-05 2002-08-27 Bay View Industries, Inc. Vacuum control device for holding a workpiece
US20050103808A1 (en) * 2003-11-14 2005-05-19 Zschiedrich Wilfried E. High Vacuum Disk
WO2005049283A2 (en) * 2003-11-14 2005-06-02 Wilfried Erich Zschiedrich High vacuum disk
WO2005049283A3 (en) * 2003-11-14 2006-04-13 Wilfried Erich Zschiedrich High vacuum disk
US7124987B2 (en) * 2003-11-14 2006-10-24 Wilfried Erich Zschiedrich High vacuum disk
US10267453B2 (en) 2006-03-03 2019-04-23 Charles L. Casagrande Mounting system and accessory components
US10801665B2 (en) 2006-03-03 2020-10-13 Charles L. Casagrande Mounting system and accessory components
US20070216154A1 (en) * 2006-03-03 2007-09-20 Casagrande Charles L Mounting system and methods for attaching accessory components
US20100044538A1 (en) * 2008-08-19 2010-02-25 Fih (Hong Kong) Limited Assembly device for display screen
JP2013223893A (ja) * 2012-04-20 2013-10-31 Toyo Mach & Metal Co Ltd 部品取出装置
US20140251760A1 (en) * 2013-03-11 2014-09-11 Texas Instruments Incorporated Die eject assembly for die bonder
US9305812B2 (en) * 2013-03-11 2016-04-05 Texas Instruments Incorporated Die eject assembly for die bonder
US10190345B2 (en) * 2015-05-21 2019-01-29 Kyle S. McCullough Suction cup child restraint lock for sliding doors/windows
US20160340948A1 (en) * 2015-05-21 2016-11-24 Kyle S. McCullough Suction Cup Child Restraint Lock for Sliding Doors/Windows
EP3324060A1 (en) * 2016-11-16 2018-05-23 Samsung Electronics Co., Ltd. Vacuum suction device and electronic device including the same
US10774870B2 (en) 2016-11-16 2020-09-15 Samsung Electronics Co., Ltd. Vacuum suction device and electronic device including the same
US20200256376A1 (en) * 2019-02-07 2020-08-13 Ten Sheng Assorted Houseware Co., Ltd. Suction cup
US10753384B1 (en) * 2019-02-07 2020-08-25 Ten Sheng Assorted Houseware Co., Ltd. Suction cup
US11359664B2 (en) * 2020-01-06 2022-06-14 Lih Yann Industrial Co., Ltd. Suction cup
US11892119B1 (en) * 2023-02-13 2024-02-06 Tilta Inc. Suction-operated device

Also Published As

Publication number Publication date
DK120453B (da) 1971-06-01
DE1917619A1 (de) 1970-01-15
NL6907843A (xx) 1969-11-25
BE733437A (xx) 1969-11-03
NO124281B (xx) 1972-03-27
GB1212153A (en) 1970-11-11
CH468546A (de) 1969-02-15
JPS4839659B1 (xx) 1973-11-26
SE337669B (xx) 1971-08-16
FR2009071A1 (xx) 1970-01-30
AT288672B (de) 1971-03-10

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