US3837257A - Anchoring device - Google Patents

Anchoring device Download PDF

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Publication number
US3837257A
US3837257A US00280885A US28088572A US3837257A US 3837257 A US3837257 A US 3837257A US 00280885 A US00280885 A US 00280885A US 28088572 A US28088572 A US 28088572A US 3837257 A US3837257 A US 3837257A
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trailing
spring sleeve
section
sleeve
axial end
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US00280885A
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A Fischer
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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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
    • F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
    • F16B13/063—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander
    • F16B13/066—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander fastened by extracting a separate expander-part, actuated by the screw, nail or the like
    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose

Definitions

  • a convoluted p g sleeve of Soft wire is sertable into a bore hole.
  • An expander member has [52] US. Cl 85/64, 85/67, 85/73 one part located forwardly of the leading end of the F161) Sleeve, and another p located in the leading end [58] d 0 Search 85/64 75 and tapering towards the trailing end of the sleeve.
  • a 6 R f cap sleeve has one section located outside and in abut- [5 1 e erences C'ted ment with the trailing end of the sleeve, and another UNITED STATES PATENTS part located within the trailing end.
  • the present invention relates to an anchoring device for fastening in a drill or bore hole formed in concrete construction components.
  • a further object of the invention is to provide such a device which can be manufactured very simply and economically.
  • Another object of the invention is to provide such de- A vice which achieves, with only a single spring sleeve, an effective fastening over that region of the spring upon which the expansion body or member of the device acts.
  • the spring sleeve as a block spring, providing the expansion body at its insertion end with a collar, the outside diameter of which corresponds to the diameter of the drill hole, and arranging at the trailing end of the spring sleeve opposite the insertion or leading end thereof a cap having two sections, one section protruding into the spring sleeve and the other section covering the front face of the latter.
  • a bore or drill hole is first produced in a structure in which the device is to be anchored; the diameter of the bore corresponds to the outside diameter of the spring sleeve.
  • the device is now inserted into the drill hole together with the expansion body and with the fixing or expanding screw, a few threads of which have been screwed into the expansion body.
  • the spring sleeve adapts itself to the wall of the drill hole and thus achieves, before the expansion body has been inserted, a'bracing action which is sufficient to prevent the twisting of the device in the drill hole when the expansion body is inserted.
  • the coils of the spring sleeve at the leading end thereof also exert a bracing action upon the expansion body, so that the latter cannot twist in relation to the spring sleeve when the fixing screw is subsequently turned.
  • the device During insertion'of the device into the drill hole, some of the convolutions of the spring sleeve are pushed radially outwards against the wall of the drill hole by the cone of the expansion body. At the same time, the device is shortened due to axial contraction and radial expansion of the sleeve, so that the remaining coils of the spring sleeve overlap and are thus clamped into the space betweenfixing screw and the drill hole wall.
  • a drill hole of small depth suffices for effective fastening, for example for supporting components of suspended ceilings, tubes, or other elements.
  • the spring sleeve in effect as a dowel sleeve and as an expansion sleeve,'that is as adowel body. Without impairing the function of the dowel, it is thus possible to shorten the length of the dowel by cutting the spring wire. It is thus possible for the first time to adapt, by cutting its expansion sleeve, a metal dowel to any drill hole depth and to any purpose.
  • the cap serves for guiding the spring and, moreover, prevents jamming and tilting of the first coil or convolution at the trailing end of the spring sleeve in the bore of an object to be secured.
  • the spring sleeve may be wound from soft wire, in particular from copper wire. This facilitates the insertion of the expansion body into the spring sleeve, because a sleeve of soft wire can be more easily expanded by the expansion body.
  • the spring sleeve may be wound right-handed. Due to its elasticity, the spring sleeve pushes against the cone of the expansion body in such a manner that under normal conditions the expansion body cannot twist in relation to the spring sleeve. If, however, twisting should happen nevertheless, for example if the thread of the fixing screw is damaged, the spring sleeve whose coils are in contact with the expansion body, is also twisted in clockwise direction as the screw is rotated. In the case of right-handed winding of the spring sleeve, however, the latter will then contract and engage the expansion with increasing pressure until the action which prevents twisting is again fully effective.
  • the end of the wire at the insertion or leading end of the spring sleeve may be bent outwards.
  • this wire end engages with the wall of the drill hole and thus also contributes to the prevention of spring twist in relation to the drill hole.
  • the expansion body may contain at its trailing end opposite its leading or insertion end a cylindrical attachment or portion, the outside diameter of which corresponds to the inside diameter of the spring sleeve. This attachment serves for centering the expansion body in the spring sleeve.
  • a collar that engages in the coils of the spring sleeve may be arranged at the attachment.
  • This collar is advantageously formed with a thread. The expansion body can thus be screwed into the spring sleeve without the possibility of being lost, so that it is easily possible to unthread the fixing screw from the expansion body after the device according to the invention has been anchored in the bore hole.
  • At least part of the outer surface of the attachment may be roughened, as for example by knurling. This construction increases the friction between the spring sleeve and the expansion body still further, so that twisting of the expansion body in relation to the spring sleeve is excluded.
  • This construction permits so-called push-through assembly, which saves time and expense because the bore holes in the basic support structure and in the element to be fastened to it, are formed simultaneously with the element being in position on the support structure. Then the device is simply pushed from the exposed side of the element through the bore hole thereof so as to extend partly into the bore hole of the support structure, andis thereupon anchored.
  • the end of the shaft of the fixing screw may in addition be conically tapered in the direction of the thread section, so that the spring is braced between the cones of the expansion body and the fixing screw opposite one another.
  • the section of the cap that protrudes into the longitudinal passage of the spring sleeve may be tapered in the direction of the leading or insertion end.
  • the novel device thus comprises a spring sleeve and two opposed cones as expansion bodies. bracing the spring sleeve in the drill hole.
  • the spring sleeve itself forms or acts as a dowel body that can be widened, i.e. radially expanded.
  • the expansion body is drawn towards the trailing end of the sleeve, i.e. in the direction of the cap provided with a cone, which is supported by the object to be fixed.
  • the reduction of the gap between the two opposite cones effects an axial shortening of the spring, the coils of which thus undergo concomitant radial expansion and are pushed against the wall of the drill hole.
  • the two cones penetrate into the passage of the spring sleeve and further expand the latter. Two factors are thus essential for the fastening of the device, which by their cooperation contribute to the achievement, by
  • a cylindrical attachment may be provided on the cone of the cap, the outside diameter of which attachment corresponds to the inside diameter of the spring sleeve. This latter attachment serves for centering and guiding the spring sleeve.
  • a further embodiment provides for a collar which engages in the coils of the spring sleeve and which may be arranged at the attachment.
  • the device is mounted flush with the wall. Since the outside diameter of the fixing screw to be screwed into the expansion body is smaller than the outside diameter of the device per se, this means that the fixing screw is free in the object to be fixed. How ever, the object to be fixed has thus no support, and the device also lacks a counter bearing when the expansion body is drawn in by means of the fixing screw, due to the equality. of the drill hole diameters in the wall and in the object to be fixed, which counter bearing should of course prevent the withdrawal of the device from the drill hole.
  • the cap is constructed as a tubular element which extends rearwardly beyond the trailing end of the spring sleeve.
  • a hole is drilled into the wall through the object to be fixed, the diameter of which hole corresponds to the outside diameter of the device.
  • the device may then be inserted to such an extent that its upper end is flush with the outer surface of the object to be fixed (push-through installation).
  • the expansion body By drawing in the expansion bodyby means of a stay bolt and a nut, or, respectively, a cap screw, the device is then anchored fastened in the drill hole and the object is secured to the wall.
  • the rearwardly extended portion of the cap may be provided with a circumferential recess of saw-toothshaped cross section, and which has a distance from the trailing end of the device that preferably corresponds to the thickness of an object to be fixed.
  • the reduction in the wall thickness of the cap which is caused by provision of this recess has the result that an upset occurs when the fixing screw is screwed in further, or the nut is tightened further, after the anchoring of the device in the zone of the change of the cross-section, which upset enables the object to be fixed to be braced particularly rigidly to the wall.
  • the recess has the further advantage. That the rear section which is separated by this recess from the remainder of the cap can be readily removed when not needed. This is desirable when, for example, the thickness of the object to be fixed is small and the rear section therefore not needed. In mass production it is expedient to restrict the spacing of the recess from the trailing end of the device to a few selected distances.
  • the part of the spring sleeve which is wound in the manner of a block spring is first expanded by drawing in the cone by means of the fixing screw and is thus braced against the wall of the drill hole.
  • the block spring-type part of the spring sleeve is already stationarily fastened in thedrill hole by this bracing.
  • the fastening effect is further reinforced on the one hand, while on the other hand the cap is now drawn forwardly into the drill hole to such an extent that those coils which were previously not in contact with one another will now move into such abutment.
  • the anchoring of the device in the drill hole, as well as the bracing of the object which is to be fixed between the head of a screw or the nut of a screw bolt and the surface of the structure in which the device is anchored are completed.
  • the desired bracing of the object to be fixed can also be achieved by providing the center passage of the extended cap with a short widened bar section extending inwardly from its free rear end face.
  • This widened bore section results in the cap having in the zone of its free rear end face a region of reduced wall thickness, which can give way after the anchoring of the device in the drill hole and when the fixing screw or the fixing nut are thereupon further tightened, so that in this embodiment too, a bracing of the object to be fixed to the surface of the support structure is made possible.
  • the region of reduced wall thickness carries the further advantage that when a stay bolt with fixing nuts is used, and the drill hole has inadvertently been drilled oblique, complete contact of the fixing nut and the surface of the object to be fixed can nevertheless be achieved.
  • the region of reduced wall thickness will partially yield so that the nut can take up a position perpendicular to the axis of the bore, the stay bolt being given a slight deflection in that its end protruding from the bore hole is bent in the direction of the axis of the bore.
  • the retention values of the novel device can be increased still further if a better pressure distribution in the zone of the expansion body can be achieved and, moreover, if sliding of the coils over expansion body is prevented when the latter is drawn in.
  • the cylindrical section By means of the cylindrical section, the outside diameter of which corresponds to the largest diameter of the cone, several coils are expanded to the same outside diameter, so that several coils are pressed with maximum pressure against the wall of the drill hole. This results in further improvement of the pressure distribution, which increases the retention values.
  • the collar at the leading or insertion end of the expansion body whose diameter corresponds to the inside diameter of the drill hole, prevents a further sliding back of the spring sleeve, so that the other coils too contribute to the fastening of the device by the shortening of the spring sleeve. Two factors are thus essential for the fastening, the cooperation of which makes the achievement of high extraction values possible.
  • the increase in the retention values of the device depends substantially upon the length of the cylindrical section. An increase may already be achieved if the section has a length which suffices for taking up one coil. Tests have shown, however, that an optimum value of the increase is achieved when the cylindrical section is given sufficient length to permit two to four coils to be taken up.
  • FIG. 1 shows a device according to the invention, inserted into a concrete support structure
  • FIG. 2 illustrates a special construction of an expansion body
  • FIG. 3 shows a device according to the invention in a different embodiment, inserted into a concrete. sup-.
  • FIG. 4 illustrates an embodiment permitting pushthrough assembly
  • FIG. 5 shows a special construction of a cap
  • FIG. 6 shows an embodiment of the device having a rearwardly extended cap
  • FIG. 7 illustrates a special construction of the free rear end of a cap
  • FIG. 8 shows a special construction of a spring sleeve
  • I FIG. 9 shows a special construction of an expansion body.
  • the device according-to the invention as shown in FIG. 1 comprises a spring sleeve I wound from wire in the manner of a block spring.
  • a fixing screw 3 meshes with an expansion body 2. By screwing the fixing screw 3 into the conical expansion body 2, the latter is drawn axially into the spring sleeve 1.
  • the coils or convolutions at the leading end portion of the spring sleeve 1 are thus widened and pushed radially outwardly against the wall of the drill hole 7 formed in a concrete support structure 8.
  • the expansion body 2 further has at its leading or insertion end a collar 4, the outside diameter of which corresponds to the inner diameter of the drill hole.
  • a cap 5 is set upon the rear or trailing end of the spring sleeve 1, having one section which protrudes into the center passage of the spring sleeve 1, and another section which covers the rear end face of the spring sleeve 1. This prevents the first coil at the trailing end of the spring sleeve 1 from jamming or tilting in the drill hole of an object 6 to be fixed to structure 8.
  • the coils of the spring sleeve 1 adapt themselves to the irregular form of the drill hole 7 in the concrete support structure 8 and thus prevent by their intrinsic tension force a twisting of the spring sleeve 1 when the device is fastened.
  • the expansion body 2 shown in FIG. 2 has at its trailing end opposite the leading or insertion end an additional cylindrical portion or attachment 9, the outside diameter of which corresponds to the inside diameter of the spring sleeve 1.
  • a collar 10 is arranged at the front end of the attachment, which collar engages between the coils of the spring sleeve. This collar 10 is advantageously formed as or with a thread.
  • the cap 5 has two sections 5a, 5b, of which the section 5a protrudes into the bore of the spring sleeve 1 and the section 5b covers the rear end face of the spring sleeve 1.
  • the section 5a is conically tapered in direction towards the expansion body 2.
  • the spring sleeve 1 is thus braced between the two opposite cones of the expansion body 2 and the cap 5 by means of the fixing screw 3.
  • the cap 5 is supported by the object to be fixed and thus aids in preventing a withdrawal of the spring sleeve 1.
  • FIG. 4 shows an embodiment in which a section 3a of the fixing screw which engages in the expansion body 2, in the spring sleeve 1 and in the cap 5, is set off.
  • the outside diameter of the shaft 3b of the fixing screw 3 corresponds to the outside diameter of the spring sleeve 1.
  • the cap 5 shown in FIG. 5 is provided, as an extension of its cone with an additional cylindrical portion or attachment 12 the outside diameter of which corresponds to the inside diameter of the spring sleeve 1.
  • a collar 13 is arranged at the front end of the attachment and engages between the coils of the spring sleeve 1. This collar is advantageously formed as or with a thread.
  • the section 5b of the cap 5 is rearwardly extended and serves for the support of the object 6 which is to be fixed to the support structure.
  • the fact that the outside diameter is uniform over the entire length of the device makes push-through assembly possible, in which the same drill hole diameter is required both in the object 6 to be fixed and in the support structure 8.
  • the circumferential saw tooth-shaped recess subdivides the extended section 5b of the cap 5 into two parts, the length of the upper part 5c corresponding approximately to the thickness of the object 6 to be fixed.
  • the saw tooth-shaped recess 20 serves on the one hand as knock-off notch for the upper part 5c and on the other hand as an upsetting zone which should render it possible for the fixing screw 3 to be drawn, after the anchoring of the device is completed, in the direction toward the surface of the structure 8 for bracing the ob ject 8 between such surface and the head of screw 3.
  • FIG. 7 shows another construction of the recess 20, which is easier to manufacture.
  • the free rear end of the cap 5 is provided with a wider bore section 23 which ensures a lower wall thickness of the cap in the zone of the rear end thereof. In the zone of the thus reduced wall thickness, the cap may give way in axial direction when an axial force is applied, by crumpling.
  • the section 23 may be connected with the remainder of the bore by a tapered bore section 23'.
  • FIG. 8 shows a special embodiment of the spring sleeve.
  • the coils of the major part 22 of the spring sleeve are in immediate abutting contact with one another in the manner of a block spring, while the coils of the remaining part 21 which faces away from the expansion body 2, are spaced from one another.
  • the cap 5 can be moved in the direction of the expansion body 2 by the total amount of the distances between the coils of the smaller part 21, by deflecting the coils thereof into abutment with one another.
  • the expansion body 2 has a cone 30 and at its insertion end a collar 4, the outside diameter of which corresponds to the inner diameter of the drill hole 7.
  • a cylindrical section 31 for taking up at least one coil of the spring sleeve 1 is arranged between the cone 30 and the collar 4. The diameter of this section 31 corresponds to the largest diameter of the cone 30.
  • a head screw or a stay bolt with nut may selectively be used as the fixing screw 3,
  • An anchoring device for use in bore holes formed in structures, particularly bore holes formed in concrete structures, comprising a helical block-spring expansion sleeve having a leading and a trailing open axial end; discrete internally threaded expander member located at said leading axial end and including a substantially cylindrical first portion located exteriorly of said leading axial end and having a shoulder with an outer diameter greater than the inner diameter of said spring sleeve, a second portion located in said leading axial end and converging in direction toward said trailing axial end, and a cylindrical intermediate third portion located between said first and second portions and having an axial diameter equalling the maximum outer diameter of said second portion, and an axial length corresponding to the axial length of at least one convolution of said spring sleeve; threaded expanding means extending from said trailing axial end through said spring sleeve into threaded engagement with said expander member and being operable for advancing the latter in direction toward said trailing axial end to thereby effect radial expansion of said spring sle
  • said second portion of said expander member having an end region remote from said first portion and being of cylindrical configuration, said end region having an outer diameter corresponding to the inner diameter of said spring sleeve.
  • said expanding means comprising an elongated threaded bolt having a leading portion of smaller diameter received in said spring sleeve, and a trailing portion located outside said trailing end of said spring sleeve and being of a diameter corresponding to the diameter of said spring sleeve in non-expanded condition.
  • said first section of said cap member includes a leading end portion of cylindrical configuration and having an outer diameter corresponding to the inner diameter of said spring sleeve, and an intermediate portion connecting said leading end portion with said second section and converging in direction from the latter towards the former.
  • leading end portion including an outwardly extending collar portion arranged to engage between adjacent convolutions of said spring sleeve.
  • said spring sleeve having a longer first sleeve section extending from said leading toward said trailing end, and a shorter second sleeve section extending from said first sleeve section to said trailing end; and wherein adjacent convolutions in said first sleeve section are in abutment in nonexpanded state of said spring sleeve, and adjacent convolutions in said second sleeve section are spaced from one another.
  • a device as defined in claim 1 said second section having a trailing endface remote from said first section; and wherein said axial passage has a widened passage portion extending from saidtrailing endface towards said first section.
  • An anchoring device for use in bore holes formed in structures, particularly bore holes formed in concrete structures, comprising a helical block-spring sleeve having a leading and a trailing open axial end; an expander member located at said leading axial end and including an annular first portion located exteriorly of said leading axial end and having an outer diameter at least equal to that of said spring sleeve, a second portion located in said leading axial end and converging in direction towards said trailing axial end, and a cylindrical intermediate third portion located between said first and second portions and having an outer diameter equalling the maximum outer diameter of said second portion and an axial length corresponding to the axial length of at least one convolution of said spring sleeve; expanding means extending from said trailing axial end into engagement with said expander member and being operable for advancing the latter in direction towards said trailing axial end to thereby effect radial expansion of said spring sleeve; a cap member at said trailing axial end and provided with an axial passage, said cap member including

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Dowels (AREA)
  • Springs (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
US00280885A 1971-08-17 1972-08-15 Anchoring device Expired - Lifetime US3837257A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE2141079 1971-08-17
DE2145918 1971-09-14
DE2162255 1971-12-15
DE2164587 1971-12-24

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US05446922 Continuation-In-Part 1974-02-28

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US3837257A true US3837257A (en) 1974-09-24

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US00280885A Expired - Lifetime US3837257A (en) 1971-08-17 1972-08-15 Anchoring device

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US (1) US3837257A (fr)
JP (1) JPS4831358A (fr)
AT (1) AT315446B (fr)
BE (1) BE786909A (fr)
CA (1) CA958263A (fr)
CH (1) CH544235A (fr)
CS (1) CS161058B2 (fr)
DD (1) DD98556A5 (fr)
DK (1) DK133312C (fr)
FR (1) FR2150119A5 (fr)
GB (1) GB1376524A (fr)
IE (1) IE36869B1 (fr)
IL (1) IL39893A (fr)
IT (1) IT964030B (fr)
NL (1) NL157086B (fr)
NO (1) NO130549C (fr)
PL (1) PL82680B1 (fr)
RO (1) RO61294A (fr)
SE (1) SE382096B (fr)
YU (1) YU34602B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3955464A (en) * 1973-05-25 1976-05-11 Artur Fischer Expansible anchor for securing an object to a support structure
US3968721A (en) * 1971-08-17 1976-07-13 Artur Fischer Expansion anchor with safety feature
US3974734A (en) * 1974-06-14 1976-08-17 Maechtle Fritz Expandable anchor stud
US4056037A (en) * 1975-02-14 1977-11-01 Dom Holdings Limited Expanding bolt-like fastening means
US4065996A (en) * 1973-06-09 1978-01-03 Artur Fischer Anchoring device for use in masonry and like structures
CN103161805A (zh) * 2011-12-09 2013-06-19 贵州大奥博科技开发有限公司 一种膨胀螺栓的制作方法及弹簧式膨胀螺栓
US20160285203A1 (en) * 2013-10-16 2016-09-29 Aleees Eco Ark Co., Ltd. Positive locking confirmation mechanism for battery contact of electric vehicle

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2132730B (en) * 1982-12-21 1987-02-18 Noel Lecourt Improvements relating to expansion bolts
AT378044B (de) * 1983-10-05 1985-06-10 Reimoser Fritz Zum einsatz in ein loch bestimmter schraubanker
WO2021255857A1 (fr) * 2020-06-17 2021-12-23 イイファス株式会社 Ancrage sismique, et procédé de construction et structure de fixation associés

Citations (11)

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US570786A (en) * 1896-11-03 Expansion-bolt
US768283A (en) * 1903-12-07 1904-08-23 Jenkins Mfg Company Expansion-bolt.
US1120409A (en) * 1912-02-08 1914-12-08 Booraem & Rohmer Patent Company Expansion-bolt.
US1201496A (en) * 1912-12-09 1916-10-17 Ralph S Peirce Anchor-bolt.
US1352200A (en) * 1917-08-20 1920-09-07 Orsbee Co Inc Bolt-anchor
US1395453A (en) * 1921-11-01 Fastening device
US1852297A (en) * 1931-09-28 1932-04-05 Rawlplug Company Inc Bolt anchor
US3202034A (en) * 1963-01-18 1965-08-24 John J Korenchan Bolt anchorage with loosening preventing means
GB1022013A (en) * 1961-11-20 1966-03-09 Werner Rein An expansible wall plug
AT249955B (de) * 1964-04-10 1966-10-25 Hubert Stadlbauer Vorrichtung zum Austrocknen und Trockenhalten von Mauerwerk
US3313200A (en) * 1964-02-17 1967-04-11 Fischer Artur Expansible fastener means

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US570786A (en) * 1896-11-03 Expansion-bolt
US1395453A (en) * 1921-11-01 Fastening device
US768283A (en) * 1903-12-07 1904-08-23 Jenkins Mfg Company Expansion-bolt.
US1120409A (en) * 1912-02-08 1914-12-08 Booraem & Rohmer Patent Company Expansion-bolt.
US1201496A (en) * 1912-12-09 1916-10-17 Ralph S Peirce Anchor-bolt.
US1352200A (en) * 1917-08-20 1920-09-07 Orsbee Co Inc Bolt-anchor
US1852297A (en) * 1931-09-28 1932-04-05 Rawlplug Company Inc Bolt anchor
GB1022013A (en) * 1961-11-20 1966-03-09 Werner Rein An expansible wall plug
US3202034A (en) * 1963-01-18 1965-08-24 John J Korenchan Bolt anchorage with loosening preventing means
US3313200A (en) * 1964-02-17 1967-04-11 Fischer Artur Expansible fastener means
AT249955B (de) * 1964-04-10 1966-10-25 Hubert Stadlbauer Vorrichtung zum Austrocknen und Trockenhalten von Mauerwerk

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968721A (en) * 1971-08-17 1976-07-13 Artur Fischer Expansion anchor with safety feature
US3955464A (en) * 1973-05-25 1976-05-11 Artur Fischer Expansible anchor for securing an object to a support structure
US4065996A (en) * 1973-06-09 1978-01-03 Artur Fischer Anchoring device for use in masonry and like structures
US3974734A (en) * 1974-06-14 1976-08-17 Maechtle Fritz Expandable anchor stud
US4056037A (en) * 1975-02-14 1977-11-01 Dom Holdings Limited Expanding bolt-like fastening means
CN103161805A (zh) * 2011-12-09 2013-06-19 贵州大奥博科技开发有限公司 一种膨胀螺栓的制作方法及弹簧式膨胀螺栓
US20160285203A1 (en) * 2013-10-16 2016-09-29 Aleees Eco Ark Co., Ltd. Positive locking confirmation mechanism for battery contact of electric vehicle
US9559464B2 (en) * 2013-10-16 2017-01-31 Aleees Eco Ark (Cayman) Co. Ltd. Positive locking confirmation mechanism for battery contact of electric vehicle

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Publication number Publication date
DK133312C (da) 1976-09-27
JPS4831358A (fr) 1973-04-24
RO61294A (fr) 1976-12-15
IL39893A0 (en) 1972-09-28
NO130549C (fr) 1975-01-08
DK133312B (da) 1976-04-26
NO130549B (fr) 1974-09-23
SE382096B (sv) 1976-01-12
YU34602B (en) 1979-10-31
IL39893A (en) 1974-11-29
AU4469372A (en) 1973-05-24
AT315446B (de) 1974-05-27
CA958263A (en) 1974-11-26
PL82680B1 (fr) 1975-10-31
NL157086B (nl) 1978-06-15
FR2150119A5 (fr) 1973-03-30
IE36869B1 (en) 1977-03-16
YU195372A (en) 1979-04-30
CS161058B2 (fr) 1975-05-04
IE36869L (en) 1973-02-17
BE786909A (fr) 1972-11-16
IT964030B (it) 1974-01-21
CH544235A (de) 1973-11-15
DD98556A5 (fr) 1973-06-20
GB1376524A (en) 1974-12-04
NL7211205A (fr) 1973-02-20

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