US 2428458 A
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Description (OCR text may contain errors)
' Oct. 7, 1947.
W. G. HOLLWARTH `BOLT ANCHOR APPLYING TOOL Filed oct. 27, 1944 Patented Oct. 7, 1-947 UNITED S TATES PATENT OFFICE BGLT ANCHOR APPLYIN G TOOL William G. JHoIIinzarth, Merehantnille, N. QJ.
Application lOctober 27, 19445, Serial No. 560,675
(Cl. 21S- 19) :3 .Ciaims. 1 lThis invention relates to bolt anchor applying tools .and more particularly to tools .for applying bolt or screw anchors oi the type which include an internally rthreaded SIeevdspreada-ble side portions anda crown head-which are adapted to 'be inserted into ,a holein a support and secured therein. The tool of the present invention is es pecially suited for use with bolt or screw anchors oi ythe .type :known in the .trade as toggle screw anchors.
The apparatus heretotore available for apply-ing bolt or screw anchors of the type heretofore referred to has 'not proven :satisfactory use because .of the difficulty .of ymanipulation ther-colf, and the Ilack of certainty of the .operation thereof. With the prior applying apparatus, in some instances the fasteners do not have their .-side por.- tions spread to proper gripping position, while in other instances the side portions ,are deformed to an extent to destroy their grip and injure the support in which lthey Vare mounted, so that the fasteners are not secure and pull :out Athrough:the face oi the support.
The apparatus heretofore available for applying these anchors 'was valso exceedingly .slow in its action thereby limiting greatly 'the number oi anchors capable oi .being mounted.
In accordance with the present "invention a holtor screw .anchor applyingtool is 'provided which ls simple and :sturdy in construction, is ouick in its action, and is positive :in its mormting oi the anchor. fAt the ,same time the 'anchor yis mounted with its side portions .spread to 'the .desired .extent -for most .eiective gripping.
:Other advantageous `featureswwill be apparent from the specification and. claims.
The nature .and characteristic features of the invention will be more readily understood from the following description, .taken in .connection with the accompanying drawings for-ming ,part hereof, in which:
Figure v1 is a view in side Yelevation of Van anchor applying tool in .accordance with the present in ventionr;
Fig. 2 is .a .central sectional 4View .showing :the tool in one position and prior 'to Ithe securing .of the bolt anchor; .and
Fig. Bis a central sectional yiew .similar to Fig. 2 showingxthe tool in .another position :and with the bolt anchor secured.
It should, of course, beunderstood that the description vand drawings herein are illustrative merely, andthat various modications andchangfes may be made vin the ,structure disclosed `Avllithput departing from the spirit ,of .the invention.
2 ,Referring more 'particularly to the drawings a bolt or screw anchor Hl of the ty-pe for which the applying tool is particularly adapted i-s shown in detail in Fig. 2. The bolt anchor or Afaster-ier I0 preferably includes an internally threaded sleeve 15| from which expansibile and deformable side strip portions i12 extend to a head 13. The side strip portions |2 ypreferably have bend :lines /or creases 12a, formed thereon to start the ben-ding of the sidestrips I2 in the desired direction upon the application of -a compressive `torce thereon. The head f3 Ypreferably includes a Acollar 't4 4.with outwardly or radially extending wings or ings lli5. rE'he bolt anchor i0 is adapted to lbe l'inserted 'in any desired type of support t6, .of wood, plaster, tile, masonry, sheet material, vor the like, and in any desired direction, vhorizontally or vertically up yor down, Ain a hole Il drilled .or bored in the support Iii for the purpose. In position fior fseeuring the bolt anchor l0 the lugs or wings are disposed on the outer surface of the support i6 yand Vwitli :the-outer ends rolf the lugs .or wings I5 extending inwardly into .the .outer surface of the support i6 in gripping relationship to aid .in preventing rotation of the :anchor 'lil .after the se curi-ng thereof.
:The anchor applying tool accordance with the present invention .and as .illustrated in .Fig-s. 1, 2, and -3 .preferably includes an anchor .compressing element comprising anactuating vsterriii eX- ternally threaded at its inner .end :2l .and .secured at its .outer end in 4an :actuating head 2.2,. The aptuating head 22 is 'knurled or otherwise roughn ened von 'its peripheral edge 2.3 for .aiding .in turning .the saine with-the Fingers when desired. The end yportion 2l is adapted -to engage with the threads in the sleeve ll upon turning :of the head 22. Spaced from the head 2:2 a :disc or washer 124 is provided, slidalole on the kstern V2l) and .stopped in fone direction by a .shoulder :215 formed on the stem 2U by enlarging the same, as at 26, at the end toward the .actuating head 22,01` in .any other desired manner. The actuating head 22 has an inner face 2l for actuatngengagernent .as hereinafter explained.
The anchor applying tool Ias illustrated in Figs. 1,12 and 3, also includes .an operating element vfor the :anchor compressing `element which operating element .comprises a :body portion .30. yThe `*body portion 3.0 preferably includes a pl-ate portion 30a which has a at external :face Vportion 3l adapted to be disposed close to or in engagement with the exposed face ofthe support l. The bodyiportion 3i! is provided `with a central longitudinal slot 32 having anat internal face portion 33.. parallel to 3 the face portion 3| and forming a boundary of the slot 32. The block 3i) is also provided with faces 29 spaced above the face portion 33 for the reception of the actuating head 22. Within the slot 32 inner end portions 34 of a pair of oppositely extending lever arms 35 are mounted on pivot pins 38 carried by the body portion 30. The lever arms 35 have outer end portions 3l for manual engagement for actuation. The inner end portions 3d have cam ends 38 for engagement with the inner face of the operating head 22 for forcing the same outwardly upon inward movement of' the lever ends 3l. The levers 35 are limited in their movement in one direction by the engagement thereof with stoprpiates 28 secured to the body portion 3 and are limited in their movement in the other direction by the engagement of the inner sides 39 of the cam ends 38 with the face portion 33.
Stop plates 28 of different sizes or adjustable on the body portion 30 may be provided for varying the stroke or permissible movement of the stem 28. The face portions 3| and 33 are connected by a central slot 4|! which extends in from one side edge of the plate portion 30a and which is adapted to receive the enlarged portion 28 of the stem 28 with the Ydisc or washer 24 in engagement with the face portion 3| and with the inner face 21 of the actuating head 22 for contact by the cam ends 38 of the lever arms 35.
The stem is preferably of such lengthrand the shoulder is preferably so located that the enlarged portion 26 of the stem 2|] may be inserted in the slot 48 without binding of the disc or washer 24 on the face portion 3| or binding of the actuating head 22 on the cam ends 38 when in the position shown in Fig. 2, and further that the lugs or wings I5 will be in engagement with the disc or washer 24 when the threaded end portion 2| is in the desired engagement in the sleeve The mode oi operation of the applying tool shown in the drawings will now be pointed out.
The support I6 is prepared by having a hole drilled or bored therein at the location where it is desired to secure the bolt or screw anchor |EJ. The bolt or screw anchor or fastener l0 may v then be mounted on the stem 2 with theV enlarged portion 26 of the stem 20 extending through the collar |4, and With'the threaded inner end 2| in engagement with the threads in the sleeve The head I3 of the anchor IEi is preferably positioned with the wings or lugs l5 in engagement with the disc o1 washer ,24. Turning of the head 22 to obtain thedesired character of mounting is facilitated by the roughened surface of the peripheral edge 23,
If desired the bolt or screw anchor 8 may first be positioned in the hole and the stem 20 inserted and positioned. The location of the disc or washer 24 with respect to the shoulder 25 i i the disc or washer 24 and with the cam ends 38 adjacent the face 2'! of the head 22 by passing the slot 48 past the stem until the rear end of the slot contacts said stem.'
The lever arms 35 are then manually movedV from a position'out of alinement with each other,
indicated in Figs. land 2, to a position in or subwill indicate whether the threaded end 2| is propv disposed in parallel relations'hippsaid Aplate-por- Y tion .having a'central slotextending therethrough from one'side edge to .the centerthereof; 'anV ac',V
rection, and move the sleeve outwardly. This applies a compressive force on the side strip por,- tions l2, spreading the side strip portions |2 to the desired lextent and into gripping engagement with the support I6. as shown in Fig. 3. The distance the sleeve portion is moved de'- termines the spreading of the strip portions |2 and this is regulated and controlled by limiting the movement of the levers 35. The levers 35 are stopped by their engagement with the plate portions 28. Deformation of the strip portions |2 beyond their most effective securing positions is thus obviated. The strip portions I2 are also not deformed to an extent to protrude beyond the exterior surface ofthe support I8 and thereby fail in their purpose Upon the vcompletion of the upsetting of the side strip portions |2, the
levers35 are moved to or substantially to their.
original positions and the body portion 30V is moved so that the slot is moved away from the stem 20 and thus disassociated therefrom, after which the stem 20 is unscrewed from the sleeve The applying tool, because of its simplicity, may be readily employed by unskilled persons in a manner not heretofore possible. Y
1. Apparatus Vfor securing ina support a bolt anchor having a head adapted to be positioned at the surface of the support, an internally threaded sleeve adapted to be positioned'inside the Ysurface of the support and deformable connectors between said head and said sleeve for gripping engagement with said support upon the spreading thereof, a body `member having ak plate portion with parallel ends and with a forward substantially'at face adapted to be po'- sitioned adjacent the surface of the support, a pair of spacedprojections at each end of said plate portion Vextending rearwardly therefrom' a pivot pin mounted in each pair of projections,
said pivot pins being disposed in yparallelirela` tionship, said plate portion having a central slotY extending therethrough from one side edge to thecenter thereof, an actuating member having al shank rextending through the slot in said plate portion and enlarged'at the rear end to provide an actuating head, said shank having the forward end thereof threaded'for engagement with the sleeve, and' manually operable levers pivotally ment-*with said support upon the spreading there-Y c of, a body member having a plate portionwith parallelY ends and with a forward .substantially at face adapted to be positioned' adjacent the surface of: the support, Va. pair ofk spaced Vprojections at each end of said plate portion extending rearwardly therefrom, a pivot pin mounted in each' pair of projections,said pivot pins being '5 tuating member having a shank extending through the slot in said plate portion and enlarged at the rear end to provide an actuating head, said shank having the forward end thereof of reduced diameter to provide a shoulder and being threaded for engagement with the sleeve, a spacer member of substantially the same diameter as said head positioned between said forward face of said plate portion and said support and being adapted to be seated against said shoulder, and manually operable levers pivotally mounted on said pins and each having a cam end for actuating engagement with said actuating head.
3. Apparatus for securing in a support a bolt anchor having a head adapted to be positioned at the surface of the support, an internally threaded sleeve adapted to be positioned inside the surface of the support and deformable connectors between said head and said sleeve for gripping engagement with said support upon the spreading thereof, a body member having a plate portion with parallel ends and with a forward substantially at face adapted to be positioned adjacent the surface of the support, a pair of' spaced projections at each end of said plate portion extending rearwardly therefrom, a pivot pin mounted in each pair of projections, said pivot pins being disposed in parallel relationship, said plate portion having a central slot extending therethrough from one side edge to the center thereof, an actuating member having a shank extending through the slot in said plate portion and enlarged at the rear end to provide an actuating head, said shank having the forward end thereof of reduced diameter to provide a shoulder and -being threaded for engagement Iwith the sleeve, a spacer member of substantially the same diameter as said head positioned between said forward face of said plate portion and said support and being adapted to be seated against said shoulder, manually operable levers pivotally mounted on said pins and each having a cam end for actuating engagement with said actuating head, and stop members on the ends of said plate portion for limiting the movement of said levers.
WILLIAM G. HOLLWARTH.
REFERENCES CITED The following references are of record in the le of this patent:
UNITED STATES PATENTS Number Name Date 2,115,251 Buck Apr. 26, 1938 2,205,772 :Bowersoxl June 25, 1940 2,324,104 Moss July 1.3, 1943 2,370,840 Carlson Mar. 6, 1945 2,148,977 Buck Feb. 28, 1939 2,365,834 Olmsted Dec. 26, 1944 2,399,442 Luce Apr. 30, 1946 1,419,412 Schrein June 30, 1922 1,829,696 Wylie Oct. 27, 1931 2,402,303 Stone June 18, 1946 FOREIGN PATENTS Number Country Date 3,197 Great Britain Feb. 6, 1897