US2077731A - Chimney scraper - Google Patents

Description

LL [E5 April 20, 1937. A. J. AABY 2,077,731

CHIMNEY SCRAPER Filed Sept. 2431935 3 Sheets-Sheet 1 Inventor 15 M677 J/iafiy,

Attorney April 20, 1937. A. J. AABY 2,077,731

CHIMNEY SCRAPER Filed- Sept. 24, 1935 3 Sheets-Sheet 2 A /6 I x Q 147 Inventov Attorney Patented Apr. 20, 1937 PATENT OFFICE 2,077,731 7 CHIMNEY somir'nit Albert J. Aaby,

Rochester, Minn.

Application September 24, 1935, Serial No. 41,948

1 Claim.

This invention appertains to new and useful improvements in chimney cleaning means, and more particularly to a novel scraper which can be operated manually.

The principal object of the present invention is to provide a scraper which can be conveniently lowered into a chimney and expanded to the desired extent for effectively and eificiently scraping the inside of the chimney walls.

Various other important objects and advantages of the invention will become apparent to the reader of the following specification.

In the drawings Figure 1 represents an end elevational view of 15 the scraper.

Figure 2 represents a side elevational view of the scraper.

Figure 3 represents a sectional view taken substantially on line 3-3 of Figure 1.

Figure 4 is a sectional view taken substantially on line 4-4 of Figure 1.

Figure 5 is a fragmentary detailed sectional view taken substantially on line 5-5 of Figure 2 showing certain parts removed.

Figure 6 is a cross sectional view taken substantially on line 6--6 of Figure 2.

Figure '7 represents a sectional view showing an arcuate shaped scraper desirable for use in round chimneys.

Figure 8 is an enlarged vertical sectional view on line 8-8 of Fig. 1.

Referring to the drawings, wherein like numerals designate like parts, it can be seen that the scraper unit consists in construction of an 35 elongated rectangular-shaped plate 5 provided with a pair of longitudinally extending flanges 6--6 at its edge portion.

Numeral 1 represents a vertically extending shell provided with side and bottom walls, said shell being provided with a pair of vertical slots 8 in opposite side walls thereof. The upper portion of the shell I is provided with a pair of laterally disposed extensions 9 which are secured as at IU to the said top plate 5.

Pin member H extends through the end portion of the flanges 6-6 and also through the barrel-like formations [2 at the upper ends of the strip-carrying units. Each of these units consists of a pair of parallel strips l3--I3 connected 50 together in definite spaced relation by a strap M at their upper ends, and by the scraping element l at their lower portions. The scraping element l5 may be only anchored on its length, as clearly shown in Figures 1 and 2.

As can be seen in Figure 4, a horizontal cross bar It in the shell I is provided with pintles II at its ends for disposition through the slots 8 in the shelhand these pintles extend through the adjoining ends of links. Each pintle I'l extends through a pair of link members l8-l8 for pivotally supporting the same and these links extend on to and are each pivotally connected to the corresponding lug end l9 of the saddle which carries the corresponding pair of strips I3l3 on which the scrapers 15 are located.

Obviously, when this bar I6 is moved upwardly or downwardly in the shell I, the scraper units are moved inwardly or outwardly to accommodate the device to various sized chimneys.

Vertically disposed through the shell 1 and through the bearing 2| formed in the top plate 5 is the screw shaft 22 which at its lower end is provided with a pintle 23a. extending through a small opening in the bottom of the shell I, thus providing a cleat and a journal for the shaft.

Numeral 23 represents a stub which has a socket 24 therein for receiving the upper exterior end of the shaft 22 and the bolt 25 is disposed through this socket portion of the stub 23 for connecting the stub positively to the shaft 22.

Any number of pole sections 26 can be connected end to end by sleeves 21a, so that the scraper can be inserted into a chimney to any extent desired by employing the type of fastener shown clearly in Figures 1, 2, and 8. This fastener consists of a trough-like structure 21 pivotally secured to the section 26 through the sleeve 21a as at 28, this trough-like structure 21 being provided with grooved ears 29 into which the free ends of an elongated wire spring 30 can seat, this spring being coiled around the pivot element 28 and having its spike disposed against the upper end of the sleeve 21a as in the manner shown in Figure 2, denoted by numeral 3|. The free end'of this trough-like structure 21 is provided with notches 32 for receiving studs 33 on the stub 23, these studs projecting through a sleeve 23' on said stub near the upper end thereof.

Obviously, by swinging this trough-like structure 21 outwardly, the section 26 can be disconnected from the stub 23.

Figure 7 discloses a slightly modified form of the invention wherein the scraper is denoted by reference character l5a, this scraper l5a being bolted or riveted as at 34 to the scraper I5 such as is shown in Figure 2. In other words, to accommodate the device for a round interior chimney this arcuate shaped blade l5a can be applied to the straight type of scraper l5.

As can be seen clearly in Figures 1 and 2, a

substantially square plate l5a is located between the scraper element l5 and the strips l3 to serve as a brace for the scraping elements.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and material may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

Having thus described the invention, what is claimed as new is:-

A chimney scraper comprising a shell having slots in a pair of opposed sides thereof, a screw- A vertically disposed in the shell, operating means attached to the upper end of the screw, a cross bar provided with pintles at the ends thereof slidably disposed in said slots, a cap on the shell through which said screw is journaled, said cap being elongated and extending beyond opposite sides of the shell, depending leg members pivotally connected at their upper ends to the end portions of the cap and having scraping members on the lower ends thereof, and links between the intermediate portions of said leg members and the pintles, said cross member provided with a threaded bore in which the screw is threaded.

ALBERT J. AABY.

Images