US3413772A

US3413772A - Spring loaded sleeve lug

Info

Publication number: US3413772A
Application number: US526467A
Authority: US
Inventors: William P Mccarthy
Original assignee: Ridgewood Instrument Co
Current assignee: Ridgewood Instrument Co
Priority date: 1966-02-10
Filing date: 1966-02-10
Publication date: 1968-12-03
Anticipated expiration: 1985-12-03

Description

Dec. 3, 1968 w. P. M CARTHY SPRING LOADED SLEEVE LUG Filed Feb. 10, 1966 INVENTOR %//'///'0/7? Me Car/fly Y 7 ATT gfi nited States Patent 3,413,772 SPRING LOADED SLEEVE LUG William P. McCarthy, Kansas City, Mo., assignor t0 Ridgewood instrument Company, Kansas City, Mo., a corporation of Missouri Filed Feb. 10, 1966, Ser. No. 526,467 4 Claims. (Cl. 52-677) ABSTRACT OF THE DISCLOSURE A lug for supporting form sleeves which are vertically positioned on a surface to be covered with concrete, the lug having a base to be secured to said surface, a pair of upright legs at one end of the base and a clamp element secured to the base and spaced from the legs, the legs being laterally offset with respect to the clamp, the clamp element defining a cam surface and points whereby the sidewall of the sleeve may be inserted between the legs and the clamp and retained therebetween during pouring of the concrete.

It is the primary object of this invention to obviate the need for welding lugs on form sleeves which are to be positioned on a surface to be covered with concrete, by providing a spring-loaded sleeve lug which easily fits on the mounting end of the sleeve prior to securing the latter to the concrete forms. The lugs may then be nailed or otherwise secured to the forms to dispose the sleeve in the desired vertical position.

Another important object of the instant invention is to provide a sleeve lug which will readily accommodate virtually all thicknesses and diameters of sleeves so that only a single universal size lug need be available to the construction worker in preparing passageways of varying dimensions through the finished floor.

A more particular object of the invention is to provide a universal lug of the aforementioned character wherein a pair of spaced, upright elements are secured to a base, one of the elements being spring-loaded so that the lug may be fitted onto the sidewall :of the sleeve and will be retained thereon through the clamping action provided by the elements.

Other objects include details of structure which facilitate fitting of the lug on the sleeve and additionally, assure optimum clamping strength of the lug, these and other objects becoming apparent from the following specification and accompanying drawing, wherein:

FIGURE 1 is a front perspective view of a springloaded sleeve lug made pursuant to the teachings of my invention;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is an end elevational view thereof;

FIG. 4 is a plan view of the lug blank prior to bending of the same to form a finished lug;

FIG. 5 is a plan view of a plurality of lugs shown mounted on a sleeve; and

FIG. 6 is a cross-sectional view taken along line 66 of FIG. 5 and showing the lugs fastened to a concrete form.

The lug of the present invention, broadly designated by the reference numeral 10, may be formed from an initially planar sheet of resilient material 12 having a pcripheral free edge 13, the sheet blank being shown in FIG. 4. Sheet 12 has a pair of substantially parallel, spaced-apart slits 14 formed therein, the slits each commencing at the free edge 13 of the blank 12, and each terminating at points 17 in substantially aligned relationship, said terminal points 17 being spaced inwardly from free edge 13 of the blank 12 opposite to that at which said slits 14 commence, to thereby define a center por- "ice tion 16 and a pair of outer portions 18. Center portion 16 is shorter in length than the adjacent outer portions 18 as is clear from FIG. 4.

A line of bend 20 with an offset center stretch 21 is formed in sheet 12 and traverses

portions

16 and 18 in perpendicular relationship to slits 14. A pair of inclined cut lines 22 are formed in center portion 16, each cut line 22 having one end thereof communicating with a proximal slit 14 and the opposed end terminating at stretch 21 of line of bend 20. A line of weakness 23 traverses

portions

16 and 18 parallel to line of bend 20, lines 23 intersecting with slits 14 at points 17. An aperture 24 is formed in sheet 12 in alignment with center portion 16.

Sheet 12 is preferably formed from a metallic material having high resilient qualities so that a lug may be constructed having optimum clamping action. Additionally, the material should be of a type which is easily stamped and cut to form the blank shown in FIG. 4 whereby the lug may be manufactured economically.

To form lug 10 from sheet 12, portion 16 is bent upwardly along line of weakness 23 extending between termination points 17-17 adjacent aperture 24, center portion 16 also being rebent along stretch 21 of line of bend 20 to form an upright clamp element 26 having a generally arcuate, longitudinal configuration. When portion 16 is rebent along stretch 21, a pair of projections or points 28 are defined by out lines 22, and a normally upper section 29 and a lower section 31 are presented with integral interconnection at stretch 21 of line of bend 20. As is apparent from FIGS. 1, 2 and 6, upper section 29 is planar in configuration and presents an inclined, upper cam surface 30, and lower section 31 is also planar and disposed in angular relationship to upper section 29 to present a generally arcuate or V-shaped clamp element 26.

Outer portions 18 are bent upwardly along line of bend 20 to form a pair of opposed leg elements 32 which are offset symmetrically with respect to clamp element 26. Legs 32 are substantially perpendicular to the plane of sheet 12 and, since they are bent at a spaced position from clamp 26, they are disposed in spaced relationship with respect thereto.

The portions of sheet 12 which are not bent upwardly broadly define a U-shaped base member 34 having a bight or mounting section 36 within which aperture 24 is formed and a bifurcated section 38 having a pair of stretches 40 integrally connecting mounting section 36 with corresponding legs 32. The finished lug 10, prior to use, thus takes the form shown in FIGS. 1-3.

In use, lug 10 is adapted for fitting on a sleeve 42 having a continuous sidewall 44 and an open mounting end 46. To fit lug 10 on sleeve 42 it is only necessary to draw clamp 26 away from legs 32 and slip lug 10 onto sidewall 44. As lug 10 is placed onto sleeve 42, end 46 of sidewall 44 engages cam surface 30 to facilitate sliding of the lug into fitted position. Lug 10 may also be fitted onto sleeve 42 by simply hammering the bottom of base 34 to force clamp 26 away from legs 32.

When lug 10 is in its fitted position. as shown by each of the three lugs in FIGS. 5 and 6, points 28 of clamp 26 engage the outer surface of sidewall 44 while the inner face of sidewall 44 is engaged by the corners of legs 32 as shown in FIG. 5. It will be appreciated that clamp 26 and legs 32 are properly spaced so that the resiliency of clamp 26 will cause an embracing of sidewall 44 whereby lug 10 will be maintained thereon. Points 28 tend to dig into the outer surface of sidewall 44 to preclude free sliding of lug 10 on sidewall 44 and thus serve as additional retention means for lug 10, particularly to prevent inadvertent removal thereof.

After the desired number of lugs 10 have been secured to end 46 of sleeve 42, the latter is positioned vertically on a form 48 with the lower surface of base 34 being in face-to-face relationship with the upper surface of form 48. A fastener such as a nail 59 is driven through aperture 24 into form 48 for securing lug 10 thereto. After each lug 10 is secured to form 48, concrete may be poured onto the form and around sleeve 42, it being noted that the concrete will not flow over the portion of form 48 circumscribed by sidewall 44. After the concrete fioor is finished, form 48 may be removed and sleeve 42 and its associated lugs 10 will be retained by the concrete and serve to define a passageway or opening therethrough.

It is noteworthy that lug 10 may be universally used on various thicknesses and diameters of sleeves because the resiliency of clamp 26 permits selective spaced relationship with respect to legs 32 so that clamp 26 and legs 32 are able to compensate for the particular type of sleeve. The actual number of lugs utilized for a specific sleeve of course, depends on the size of sleeve and also on the particular concrete pouring conditions.

It should also be emphasized that the lug of the present invention may be economically manufactured by merely stamping and cutting planar blanks from a sheet of material, which blanks are representatively illustrated in FIG. 4 of the drawing. The use of a stamped blank yields a lug having integrally related components, i.e., clamp 26 is a generally arcuate, normally upward integral extension of bight 36, and legs 32 comprise integral, vertical extensions of stretches 40. The monolithic lug is easily fitted onto a sleeve for concrete pouring operation and is by far more advantageous than methods heretofore used, such as the time-consuming and costly welding of lugs onto sleeves.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent is:

1. A lug for supporting a sleeve in a vertical position on a surface to be covered with concrete, said sleeve having an open end and a continuous sidewall, said lug comprising:

a base;

a first upn'ght leg element secured to said base;

a second upright leg element secured to said base;

an upright, resilient clamp clement secured to said base in spaced relationship to said leg elements, said legs being offset symmetrically with respect to said clamp whereby said clamp may be drawn away from said legs and said lug fitted onto a portion of the sidewall of said sleeve at the open end thereof so that said leg elements will engage one surface of the sidewall and the clamp element will engage the other surface of the sidewall, said base being secured to said surface;

said lug being formed from an initially planar sheet of resilient material with a peripheral free edge, said sheet having a pair of substantially parallel slits formed therein, said slits defining a center portion and a pair of outer portions whereby said center portion is bent upwardly to present said clamp and said .4 outer portions are bent upwardly, at a spaced position from said clamp, to present said legs;

said sheet having a line of bend formed therein and traversing said portions, said line of bend defining said spaced position on said outer portions; and

said center portion is rebent on said line of bend in a direction away from said legs to present a clamp having a generally arcuate configuration.

2. The invention of claim 1, wherein said clamp presents normally upper and lower sections interconnected by said line of bend, said upper section being planar in configuration and presenting an upper cam surface.

3. A lug for supporting a sleeve in a vertical position on a surface, said sleeve having an open end and a continuous sidewall, said lug comprising:

a base;

a first and a second upright leg element secured to said base at one end thereof;

a clamp element secured to said base and spaced from said one end thereof, said clamp element being sutficiently laterally offset with respect to said legs to place said leg elements and said clamp element in spaced apart vertical planes, said leg elements being laterally offset symmetrically with respect to said clamp element, whereby said lug may be fitted onto a portion of said sidewall of said sleeve, at the open end thereof. with said leg elements engaging one surface of said sidewall and said clamp element engaging the other surface thereof, said engagement occurring at ciroumferentially spaced positions on said sidewalls, said clamp element having a cam surface inclined downwardly toward said one end of the Ibase to facilitate fitting said lug onto said sleeve by placing said sidewall between said leg elements and said clamp element.

4. The invention of claim 3, said inclined cam surface defining at least one point projecting therefrom at a location most proximal to said one end of the base.

References Cited UNITED STATES PATENTS 1,212,843 l/1917 Struchen 52680 1,620,737 3/1927 Peterson 248188.7 1,767,823 6/1930 Vanderveld et a1. 312l40 1,800,075 4/1931 Imrie 312l40 1,821,083 9/1931 Visel 312-140 1,863,381 6/1932 Orthwine 312140 2,191,979 2/1940 Bierbach 52-677 2,676,483 4/1954 Nelsson 52684 2,919,878 1/1960 Nathan 248l88 3,206,150 9/1965 Lang et al 248-48 FOREIGN PATENTS 817,489 7/1959 Great Britain.

FRANCIS K. ZUGEL, Primary Examiner.