US1211784A

US1211784A - Section-elbow for concrete-conveyers.

Info

Publication number: US1211784A
Application number: US11238416A
Authority: US
Inventors: John C K Stuart
Original assignee: Individual
Current assignee: Individual
Priority date: 1916-07-31
Filing date: 1916-07-31
Publication date: 1917-01-09
Anticipated expiration: 1934-01-09

Description

1. c. K..suAnT SECTION ELBOW FOR CONCRETE CONVEYERS. APPLICAIDN FILED JUL-.Y'Sll 1916.

Puma. 1mg, 1917.

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@513, ra I JOHN C. K. STUART, 0F MONTREAL, QUEBEC, CANADA.

SECTION-ELBOW FOR CONCBETE-CONVEYERS..

Specification of Letters Patent.

iiatented Jan. 9, 191?.

Application filed July 31, 1916. Serial No. 112,384.

To au whom it may concern Be it known that I, JOHN` C. K. STUART, a subject of the King of Great Britain, residing at Montreal, Province of Quebec, anada, have invented certain new and useful Improvements in v oncrete-Conveyers; and l do hereby declare that the following is a full, clear, and exact description of the invention, such as will enable others skilled Iin the art to which it appertains to make and use the same.

in mixing and placing concrete by the pneumatic concrete placing methods, the concrete is conveyed in iron, steel or similar piping fiom the mixer to the forms and in so conveying the concrete it is generally a necessity to arrange various sections of the piping at diierent angles and the angular sections are connected by means of elbows. The concrete is conveyed through the pipes by compressed air at a very high pressure which causes the concrete to rate of speed. When the concrete comes in Contact with the elbows of the piping systems it will strike one of the inner walls of the elbows due to the curvature of the elbows, and if the concrete is very abrasive this portion of the elbow upon which the concrete travels is caused to be worn outwithout affecting the other portions of the elbows, thereby decreasing the life of the elbow compared with the life of the remaining pipes in the system. v

The present invention relates to elbows to be used in connection with such conveying systems and an object of the invention is to provide an elbow of this characterv which can be easily and readily relined so as to insure its life and cause the same to of the novel features of construction, and i last indefinitely.

With the above and other objects in view which will hereinafter appear as the description continues, the invention consists the formation of-parts as will be hereinafter more fully described vand particularly pointed out in the appended claim.

In the accompanying drawings is shown the simple and preferred form of the invention it being, however, understood that no limitation is necessarily made to the precise structural details herein exhibited but the right is hereby reserved to any changes or `alterations that may be, had and come with- 1n the scope of the invention without depart- Section-Elbows for travel at a fastl ing` from the spirit thereof or sacrificing the efficiency 0f the same.

In the accompanying drawings; Figure l is a side elevation of the elbow embodying the present invention; Fig. 2 is a vertical section taken through one of the sections of the elbow and having a portion of its lining removed; and, Fig. 3 is a vertical transverse section taken through the elbow.

Elbows heretofore used ir connection with such concrete conveying systems have been cast of one piece of suitable metal, but that portion of the elbow upon which the concrete travels is soon worn out and the entire elbow is required to be discarded.

Referring to the accompanying drawings wherein like and corresponding parts are designated by similar reference characters throughout the several views, I have illustrated the elbow embodying the subjectmatter of the present invention which comprises two semi-cylindrical sections A and. B respectively each of which having formed integral' therewith and extending radially from the sides thereof the apertured lugs 1- through which suitable bolts may extend for coupling the sections together. The opposite ends of each section are provided with the .flanges 2 having the openings 3 therein whereby the ends of the elbow may be connected in the usual manner to the adjacent sections of the piping of the conveying system.

The body portion of the inner section B is of a concave-convex conguration having the longitudinally extending iianges 4 formed along the opposite sides thereof, whereas the opposite sides of the outer sectionfA are provided with longitudinal` recesses for the reception of these flanges thereby forming an air-tight joint-,between the sections of the elbow when they are connected together.

The inner wall of the outer section A is concave so that when the sections are connected together they will form a cylindrical bore throughout the entire length of the elbow and the outer periphery of the section A is eccentric with relation to the inner periphery of the section A thereby slightlyenlarging the medial portion of this section.

Extending through the entire length of the medial portion of the Section A is a groove 5 in which is adapted to be arranged these blocks l are of the same curvature as the inner perlphery of the section A so that when they are placed in position theywill form a continuation of the inner periphery of this section whereas the' opposite -faces of these blocks are of the same curvature as the outer periphery of this section so that the medial portion of this section can be made to have the same thickness as the body portion B and its strength will not be impaired, due to the groove 5 formed therein. This inner lining mayv be of a single piece of metal or of any number of sections and these linings may be connected to the section A by means ofbolts as shown, by a dovetailed connection or any other 4suitable connection. In the connection as shown the section A is provided with a plurality of apertures 7 and ,adapted to register -with these apertures are the openings formed withinthe blocks 6, whereby the bolts 8 may extend therethrough. The heads of the bolts are countersunk within the blocks so as not to protrude in the path of the concrete while the same is passing through the elbows.

From the foregoing it is obvious that when the concrete passes through the elbow itlwill travel against the inner `sections adapted to form a cylindrical bore `therein when connected' together, an airtight connection between said sections,-l the medial portion of one of said sections being enlarged, said enlarged section being provided with a groove extending throughout the entire length of said section, a plurality of blocks adapted to be arranged within said groove, the inner periphery of said blocks being of the same curvature as the inner periphery of said section and adapted `to form a continuation thereof, and a detachable connection between each block and said for the purpose setforth.

In witness whereof I have hereunto set my hand.

4 A JOHN C. K. STUART.

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