US2733496A

US2733496A - gaetke

Info

Publication number: US2733496A
Authority: US
Publication date: 1956-02-07
Anticipated expiration: 1973-02-07

Description

Feb. 7, 1956 cs. 0. GAETKE v 2,733,496

SPA ING NUT FOR USE WITH FORM CLAMPS Filed Jan. 15, 1953 INVENTOR. GEORGE 0. GAETKE ATTORNEY United States Patent @fifice 2,733,496 795??? fi ht. i. 2 $61 This invention relates to concrete form clamps and more particularly to a novel spacing nut which is adapted for use with-form: clamps=to mairitaintwo opposed form walls in spaced relation Form clampsof""the"type embodying my invention hoidesuohi. form" walls--in rigid spaced-relationshipThe," capabfe Cof being easily assembled anddisassembled; "to --labor-costs may be eliminated.

or is apt to require operative condition.

The type of form clamp of which my novel spacing simple in construction,

thereby making it possible to minimize the cost of at least one of the important items of building construction. The provision such as that embodying my inthe said nut and the associated waler rod.

The principal object of my invention is to provide a novel spacing nut for use with form clamps, one which makes it possible to employ a simplified form clamp in the construction of concrete forms.

In the accompanying drawings Fig. l is a side elevational view of a form clamp of the type employing my novel spacing nut;

Fig. 2 is an enlarged side elevation of a part of the clamp, showing parts broken away and in section;

ig. 3 is a sectional view of a concrete wall after the wooden form and parts of the clamp have been reanci s co, assignor t o 2;; moved, .showing the spacing nuts before they have been extracted from the"said"cbn reteTWEiIIE and Fig; 4 is a 'front"view of a spacing nilt invention. i "Referring to the d bedded after the 'concret'e' har d L at the-inner end of eachw'alr rod rand ih'efexternal threads 3 are of'the same pitch; and such th reads arej of the Acme or squared 'tlype." Each waler rod 1' cam:

pr ses an inner smooth, or tapered, section 4," a short threaded portion 3 having, a maximum than. ,thaseqt a .4

Detachably secured to the short threaded each waler rod 1 of the form walls 7 and the clamping nuts 10 are arranged in firm clamping engage- The threads of the spacing nuts diameter of the flange 11b is substantially smaller than the maximum diameter of the waler rod where the maximum height of the threads 3 occurs. The flange 11b of the spacing nut 11 abuts the threaded portion 3 of a waler rod when the nut has been turned sufliciently to effect such a result, and when so positioned on the red liquid or plastic concrete material from inside the form is normally prevented from contaminating the threads of either the nut or the threads of the said short threaded section.

After the dismantling of the form walls 7 and the detachment and removal of the waler rods 1, 1, the internal threads of either spacing nut 11 may be engaged by a suitable hooked or other device when such spacing nut 11 is to be extracted from the concrete wall and thereby salvaged for further use.

What I claim is:

1. In a form clamp of the type adapted for use in combination with waler rods to hold form walls in spaced relation, an internally threaded spacing nut engageable with the inner face of one of such form walls and having an inwardly converging annular serrated periphery and an inwardly protruding circular flange on its smaller end, the said circular flange being located directly adjacent the end threads at the smaller end of the nut and the said flange having a smaller diameter than the inside diameter ofthe spacing nut.

2. In a form clamp of the type adapted for use in holding opposed form walls in spaced relation, a pair of spaced aligned waler rods extending inwardly through the form walls, each waler rod having its inner end detachably connected to a connecting rod, and each waler rod having a short threaded section positioned adjacent and internally of the form wall through which it extends, the threads of each threaded section extending outwardly from the circumferential surface of its associated waler rod, and a spacing nut detachably screwed on the short threaded secti-on of each waler rod and arranged in abutting relation to the form wall through which its associated waler rod extends, each of said spacing nuts having an inwardly converging serrated periphery and an inwardly protruding circular flange on its smaller end, the said flange having a smaller inside diameter than the outside diameter of its associated threaded section, and the said flange being arranged for abutting engagement with the threads of the short threaded section of its associated waler rod.

References Cited in the file of this patent UNITED STATES PATENTS 1,116,241 Carlson Nov. 3, 1914 1,665,649 Whitescarver et al. Apr. 10, 1928 1,851,339 Williams Mar. 29, 1932 2,044,444 Pond June 16, 1936 2,235,442 Parmenter Mar. 18, 1941 2,375,325 Robertson May 8, 1945 2,388,865 Parmenter Nov. 13, 1945