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Publication numberUS1660905 A
Publication typeGrant
Publication dateFeb 28, 1928
Filing dateSep 22, 1926
Priority dateSep 22, 1926
Publication numberUS 1660905 A, US 1660905A, US-A-1660905, US1660905 A, US1660905A
InventorsAllman John C
Original AssigneeAllman John C
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Concrete-form clamp
US 1660905 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

- c. ALLMAN CONCRETE FORM CLAMP v Filed Sept. 22. 19.26

2 She ets-Sheet 1 g-oento c LI kill/r12 1.

Feb. 28, 1928.


Filed Sept. 2 2. 1926 2 Sheets-Sheet 2 Patented Feb. 28, 1928 UNITED STATES JOHN C. ALLMAN, or PITTSBURGH, PENNSYLVANIA.


Application filed September 22, 1926. Serial No. 137,110.

The invention relates to means for'holding assembledconcrete forms and has for its object the provision of a clamping means that is quickly and easily assembled and will eifectively hold the partsof the form to gether and may be quickly dismembered when it is desired to remove the form from the completed molded object.

A further object of the invention is the provision of a clamp comprising separable members adapted to be adj ustably seci'zred togetherto form a polygon enclosing the form members,'with means to strain the clamp into intimate relation witn the form members and meansto hold theclamp in strained position. v

A further object of the invention is the provision of a clamp made up of two memhers having bifurcated ends, and other members adapted to fit between the lingers of the. bifurcated ends and having oblique notches in one of their edges to engage pins straddling the bifurcated ends of one of the bifurcated members and one end of the other bifurcated member. The remaining end of the last mentioned bifurcated member and the end of the other member in lapped relation therewith are notched to receive a latch member to hold the device in clamping position.

The invention will be described in detail hereinafter and will be found illustrated in the accompanying drawings in which Figure 1 is a plan view of a concrete form made in accordance with the invention,

Figure 2 is an edge view,

Figures 3 and 4, sectional views on the planes indicated by the lines 33 and 44 of Figure 1,.

Figure 5, a plan view of a latch member, and f Figures 6 and 7 plan and edge views, respectively, of the straining tool.

In the drawings similar reference characters will be used to designate corresponding parts throughout the several views.

The device as disclosed in the drawings is designed to be used for holding the form members for casting a column or pillar, but obviously the device to be hereinafter described may be differently proportioned, without departing from the-spirit of the invention to hold form members for different kinds of concrete casting, so that the invention is not limited to the specific arrangement as shownexcept where limited in, the appended claim.

The form clamp comprises members 1, 2, 3, and t that may be made of any suitable material, and as hereinbefore stated of any relative proportions. The members- 1 and 2 have their ends bifurcated as shown at 1, 1", 2 and 2, respectively. The bifurcated ends 1, 1 and 2 have a series of pins 5 secured therethimigh and straddling the space between the fingers of the bifurcation, while th bifurcated end 2 is provided with a series of notches 6 arranged at substantially an angle of 45 degrees to the edge of the part 2. l i

The member 3 is provided with notches 3 at one of its ends, and notches 3", at its other end, said notches being on angles of substantially 45degrees, andthe part 3 is adapted to lit between the fingers of the bifurcated ends 1 and 2 and the notches 3 and 3* will engage pins 5 therethrough, it being understood that in adjusting the clamp on the mold one of the pins on each member 1 and 2 is selected to engage one of the notches in the respective end of the member 3 to snugly engage the members 1, 2, and 3 on the mold. The member 4 is provided with notches 4: in one of its ends corresponding to the notches 3 and 3", hereinbefore described, and member 4 is adapted to fit be tween the fingers of the bifurcated ends 1 and 2 of the members 1 and 2 and be adjusted to snugly engage the mold by arranging one of the pins 5 in one of the notches 4. The other end of part dis provided with notches 42 similar to the notches 6 in the part 2, and the purpose of the notches 6 and v 49* will be now described.

After the members 1, 2, 3, and 4 have been assembled around the mold as hereinbefore described, the members are strained into clamping relation by means of a tool illustrated in'Figures 6 and 7, this tool comprising a handle 7 having a bifurcated end 8 between the legs of which is pivoted an arm 9 by means of a pin 10, and has a transverse pin 11 adjacent to its free end, and the ends of the pin extend above and below the upper and lower surface of the arm to form lugs adapted to engage aline'd notches 6 in the end. 2 of the part 2, and a pin 12 straddling the legs of the bifurcated end adjacent to their outer ends that is adapted to engage one of the notches 4 in the end of the part 41-.

The tool described is in the nature of a toggle lever, and it will be apparent that When it is in the position as indicated in Figure 1, the levermaybe operated to strain the ends of the members 2 and l to clamp the members around the form. To hold the clamp in a strained position, alatch member such as illustrated in Figure 5 is inserted as indicated, in Figure 1 to engage :in-oppositely disposed notches a and 6 to hold the clamp in strained position. The latch 'comprises a plate 13 of tapered formation, the narrow end 14 being adapted to engage in notches 1 while thewider end 15 straddles the bifurcated end 2 and engages the notches therein. The opening 16 inthe plate 13 may be use'd'for insertion of a tool for removing the latch when the clamp is to be dismem- 'bered, and may also be used for suspending the latch member from a pin or other holder when not in use.

It will be apparentthat to dismember the clamp'the toggle lever illustrated in Figures 6 and 7 may again be used to strain the lapped ends of the members 2 and 41 sothat bars and one end of the other of said bifurcated bars to engagenotches in the second mentioned bars, the notches engaged by said pins inclining outwardly towards the adjacent ends of the bars to draw theengaged bars inwardly of the clamp, the remaining end of one of the bifurcated bars being notched, the notches in the bifurcated bar and the adjacent end portion of the bar engaged thereby being inclined inwardly of the respective bars. and a latch to engage the oppositely disposed last mentioned notches.

In testimony whereof I aflix my'signature.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2441178 *Nov 15, 1944May 11, 1948Abbott Gheen RRack and gear operated column clamp
US2518112 *Sep 25, 1946Aug 8, 1950Levi Anthony LuciusBrace for construction forms
US3650521 *Jul 31, 1969Mar 21, 1972Cmi CorpConcrete form clamp
US6666441 *Apr 24, 2001Dec 23, 2003Mark S. GrendahlAnchor bolt locating jig
US6854227Oct 15, 2003Feb 15, 2005Mark S. GrendahlAnchor bolt locating jig
US20040080088 *Oct 15, 2003Apr 29, 2004Grendahl Mark S.Anchor bolt locating jig
U.S. Classification269/125, 269/228, 269/115
International ClassificationE04G13/00, E04G13/02
Cooperative ClassificationE04G13/025
European ClassificationE04G13/02C2