US1391988A - Mold - Google Patents

Description

- R. P. ZENTS MOLD.

APPLICATION HLED APR. 27. 1920.

1,391,988. 7 d ep 27, 1921..

NT OFFICE."

'RAY MON D P. 'ZENTS, OF OMAHA, NEBRASKA.

MOLD.

To all whom it may concern:

Be it known that I, RAYMoN P. ZEN'rs, citizen of the United States, residin at Omaha, in the county vof Douglas and tate of Nebraska,'have invented certain new and useful Improvements in Molds, of which the following is a specification, reference being had therein to the accompanying drawing.

My invention relates to molds and'more particularly to a mold for forming openings in concrete floors to receive pipes for heating, plumbing, gas, wiring, etc.

The principal object of the inventionis the construction of the mold in such a manner that may be readily fattached in position for use and which may be easily removed after the concrete has set and used over a number of times.

Another object resides in theprovisioii of a cover adapted to be rotated to loosen the jmold from the concrete so that it-may be re- 'moved.

A further object consists in the provision ,ofmeans carried *bythe mold for attaching to the floor framework;

With these and other objects in view, my invention consists in the novel details of construction and arrangement of parts: which will be more clearly understood from the following specification and drawings, in

V Figure 1 is a vertical section; Fig. 2 is a top plan of the sectional cas- 1 1w- I ig. 3 is a top plan ofthe cover, and v Fig. 4., a vertical section through the cover. y

In ,the-drawing ,.1 indicates the floor framework upon whichthe concrete is to be poured for forming the floor. My mold is adapted to rest upon this framework 1 and consists of the sections 2 and v The ends of the section 3 are curved inwardly as indicated at 4: so that when thesections are brought together the verticaledges of the section 3 Wlll be overlapped by the vertical edges or the section 2. I I

At spaced points, the upper edgeof the section v2 is pressed outwardly to form projections 5 for a purpose to be later described. The section 3 is also provided witha pressed out projection 6 adapted to cooperate with the projections 5 ofth-e section 2 A cross-bar 7 is provided for connecting th lowerons is of the Se t ns. 2 andfi fifth Specification of Letters Patent.

' Application filed April 27, 1920. Serial No.

tions 13 will I 11 and is Patented Sept. 27, 1921. 377,036.

with a downwardly extending flange. 12-

whichis adapted to extend around theupper end of. the sleeve or casing. This cover 11 is of. such a shape as to provide the curved portions 13 and straight portions 14.-.,The

distance from the center point of the; cover to the straight portion 14 is less than the distance from the center of the cover to the curved portion 13. a a

When in position the cover normally rests in such be over the projections 5 and 6 formed on the sections of the casing or sleeve. When the cover is rotated the straight portions 141 will engage the projections 5 and 6 and thereby force the upper portions of the sections of the sleeve or casinginwardly to reduce the upper end of said sleeve or casing.

A square ofi'set 15 is struck from the cover provided with a central opening adapted to be in alinement with the central opening of the, crossbar 7 i The cover 11 is provided with openings 16' through'which nails may be placedfor holding the upper ends of clearly shown in Fig. l of the drawings, the

sleeve or casing, when the sections are as tend through the opening 19 and hold said washer 20 inposition. An enlarged head 22 is formed on the upper end of the threaded bolt 17 and when the in position said The crossbar 7 ,is alsoprovided diameter of the a a position that the curved ponthe sections 2 and 3 extended. As

enlarged head will be received on the top of the square ofiset 15.

As stated in the objectsof my invention, my mold is primarily intended for forming openings in concrete floors and said openings are intended to have pipes extend therethrough. \Vhen in use my mold will be set upon the floor framework and the threaded bolt 17 will extend through the cover 11 and cross-bar 7. The pointed end 18 may be driven into the framework which is preferably of wood, and then by rotating the bolt the threads will engage the framework and securely hold the mold in position thereon. As stated, the upper end of the mold is of greater diameter than the lower end, and nails maybe placed through the openings 16 in the cover 11 to hold the upper end of the sleeve or casing extended. The concrete is poured upon the framework 1 around the mold and when the concrete is set sufficiently the mold is to be removed. The first step in removing the mold is to rotatethe cover 11 so that the straight portions 14: will engage the projections 5 and 6. This operation will reduce the upper diameter of the sleeve or casing and draw said sleeve or casing from contact with the concrete. Then by rotating the bolt 17 the mold will be raised from the framework and can easily be removed. It will be noted that when the bolt is rotated, the cotter-pin 21, engaging the under side of the washer 20, will raise the cross-bar 7 which in turn will raise the entire mold. The cover 11 may be rotated by engaging the square offset 15. While I have described my mold in use in connection with a wood framework, it will be understood that it could be used equally as well in connection with a metal framework. When used with a metal framework, the bolt will receive a nut carried by the framework.

From the construction described it will be seen that my mold may be used over a number of times and is not mutilated when withdrawing'from the concrete.

Having fully described my invention, what I claim as'new' and desire to secure by Letters Patent of the United States, is:

1. A mold, comprising a sleeve and a cap rotatably mounted on one end of the sleeve for reducing the diameter thereof.

2. A mold comprising a sectional sleeve, means connecting the sections adjacent one end, and a cap rotatably mounted on the opposit'e end for reducing the diameter of the sleeve.

3. A mold comprising a sleeve, a cap rotatablymount-ed on one end of the sleeve for reducing the diameter thereof and means adapted to pass through the cap and engage the inner face of the sleeve for holding it expanded. r

4. A'mo'ld comprising a sleeve, a cap rotatably mounted on one end of the sleeve for reducing the diameter thereof, and detachable means adapted to pass through the cap and engage the inner face of the sleeve for holding it expanded.

5. A mold comprising a sleeve, a cap rotatably mounted on the sleeve for reducing the diameter thereof, and an offset extending from the outer face of the cap adapted to be engaged for rotating the same.

6. A mold comprising a sleeve, a cover rotatably mounted on the top of the sleeve for reducing the diameter thereof, a cross-bar secured in the sleeve adjacent the lower end, and a threaded bolt extending through the cover and cross-bar.

7. A mold comp-rising a sleeve, a cover rotatably mounted on the top of the sleeve for reducing the diameter thereof, an offset formed on the top of the cover, a cross-bar secured in the sleeve adjacent the lower end, and a threaded bolt extending through the offset on the cover and cross-bar. I

8. A mold comprising a sleeve, outwardly extending and circumferentially spaced projections formed on the upper end of the sleeve, a cover rotatably mounted on the upper end of the sleeve and adapted to engage the projections for reducing the diameter of the sleeve, and a threaded bolt carried by the cover and extending through the sleeve. I, i

v 9. A mold comprising a sleeve, outwardly extending and circumferentially spaced projections formed on the upper end of the sleeve, a cover rotatably mounted onv the top of the sleeve, a downwardly extending flange formed on the cover, the diameter of said flange being reduced at points to engage the projections for reducing the diameter of the sleeve, and a threaded bolt carried by the cover and extending through the sleeve.

10. A mold comprising a sleeve formed in sections with their vertical edges over lapping, outwardly extending projections formed on the upper edge of each section, a cover rotatably mounted on the tops of the sections, a cross-bar connecting the sections adjacent their lower ends, and a threaded bolt extending through the cover and cross-bar.

11. A mold. comprising a sectional sleeve, a cross-bar connecting the sections adja-, cent their lower ends, a cover rotatably mounted on the top of the sleeve for reducing the diameter thereof, a threaded bolt extending through the cover and cross-bar, a washer surrounding the bolt and engaging the under side of the cross-bar, and a pin extending through the threaded bolt and engaging the under face of the washer.

12. A mold comprising a tapered sleeve, a cross-bar secured in the sleeve, a cover r0 V tatably mounted on the upper end of the 13.0

sleeve for reducing the diameter of the sleeve, and a threaded bolt extending through the cover and cross-bar.

13. A mold comprising a sectional tap ered sleeve, a cross-bar connecting the sections adjacent their lower ends, a cover rotatably mounted on the upper end of the sleeve for reducing the diameter thereof and provided with openings, means passing through the openings for engaging the in- .ner face of the sections for holding them expanded, and a threaded bolt extending through the cover and cross-bar.

14;. A mold comprising a sleeve, a crossbar, right-angle extensions formed on each end of the cross-bar and engaging the interior of the sleeve, means passing through the sleeve and right-angle extensions for securing the cross-bar to the sleeve, a cover rotatably mounted on the upper end of-the sleeve for reducing the diameter thereof, and a threaded bolt extending through the cover and cross-bar.

15. A mold comprising a sectional ta- M c pered sleeve, outwardly extending projectionsvformed on the upper end of each section, a cover rotatabl mounted on the top of the sleeve anda apted to engage the projections to reduce the {diameter of the sleeve, an offset formed on the top of the c0ver,"a cross-bar connecting the sections of the sleeve adjacent their lower ends, a 7

threaded bolt extending through the offset on the cover and cross-bar, a washer carried by the threaded bolt and en aging the un derface of the cross-bar, an a pin extending transversely through the bolt and engaging the under side of the washer.

- In testimony whereof I have hereunto A affixed my signature in the presence of two

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