US1193476A

US1193476A - Office

Info

Publication number: US1193476A
Authority: US
Publication date: 1916-08-01
Anticipated expiration: 1933-08-01

Description

' M. BLOCK.

FORCE PUIVIP..

APPLICATION FILED APR. I7. 1916.

Patented Aug. 1, 1916.

MANDEL BLOClK, OF CHICAGO, ILLINOIS, ASSIGNOR T ILLINOIS FORCE CUI & SPECIALTY COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

FORCE-PUMP.

' T 0 all whom it may concern Be it known that I, 'MANDEL BLOCK, acitizen ofthe UnitedStates, residing at Chicago, in the .county'of Cook and State of Illinois, have invented a certain new and useful Improvement in Force-Pumps, of which the following is "a specification.

My invention relates to force pumps such as are used-by plumbers to remove obstructions from pipes by forcing water through them. Such pumps are used, for example, in a domestic sink or bowl when the drain pipe becomes stopped up. The method employed is to place the domelike body of the. device over the receiving mouth of the drain pipe,

the lower rim of the device resting upon the surface surrounding the mouth of the pipe. This is presumed to make an air tight clo sure and the plumber may then, by pushing down or collapsing the body, force air or water down through the pipe, thus forcibly These rubber removing the obstruction. force pumps have been known for years and are fairly satisfactory when the rubber. is

new, but in practice the rubber rapidly deteriorates and soon renders the device inoperable. It will be understood that in order to be operative, there must be a close air tight connection between the rim of the pump and the surface of the sink, and a very slight leakage at any point will make the device useless. After the known devices have been kept a little while, their rims become warped from any one-of several causes. It may be from use, but more frequently the warping is due to pressure received during storage, either while in. the possession of the journeyman plumber or in the possession of the supply house.

The object of my invention is to remedy these difiiculties; and I accomplish it by improving, the construction at the base of the domelike body as shown in the accompanying drawings, in which Figure l is a perspective view of the device. Fig. 2 is an axial section thereof. Fig. 3 is a perspective view of the device show.-

ing how it tends to warp when not provided with the stiffening element. Fig. 4 is a perspe'etive of the preferred form of the stiffening element.

Similar numerals refer to similar parts throughout the several views.

The body 1 of the device is of impervious,

resilient material, usually rubber. 'At j the I Specification of Letters Patent. Application filed April l7, 1916. Serial No. 91,551.

Patented Aug. 1, 1916.

top it has a socket 2 for receiving ,the lower end ofthe handle 3 by which it is manipulated. This rubber body is domelike in general appearance and has a rim 4 which is flat 011 the bottom .so as to make close contact withthe surface of the sink or bowl. A slight distance above the bottom surface I embed a stiffening element 5 which in the preferred form consists of a coiled spring, the ends of which are brought together to form a torus. This stiffening-element may be molded into the device during the .manufacture of the'body or an annular groove may be'formed in the rim and the stiffening element inserted afterward. In the draw-' ings, I have illustrated the latter construcftion, the body having two lips 6, 7 with a comparatively narrow slot 8 between them,

thusholding the stiffening element firmly in place in the annular chamber 9. Under these circumstances it is desirable to form a recess 10 at one or more points within the body to enable the operator to grasp the stiffening element to remove it.

In use, the spring torus holds the rim in shape so that it makes a true circle and the bottom lies in a true plane, at the same time permitting the device to accommodate itself to inaccuracies .of surface. greatest advantages arises from the fact that the torus holds the rim. true when not in use and hence prevents it from getting out of shape.

But one of the Heretofore large quantities I of such devices have been thrown away as useless even before they had ever been actually put to use; with my constructlon, however, thedevice holds its shape almost indefinitely and makes very close contact with the surface to which it is applied. As a result of my invention, not only is the emciency of the device when in use increased,

but-the life is indefinitely prolonged.

It follows from the construction of the stifiening element 5 in the form shown that it is slightly stretchable or expansible as well 1. A force pump forplumbers having a dome-like body with. an annular. base, said in the base slightly above the extreme bottom, whereby there is a portion of rubber beneath the spring and separating the spring from the object upon which the device rests. 15

A plumbers force puinp comprising a domelike body of rubber, a handle for col- I lapsing it, and a spring torus made from a wire helix, said body having an annular chamber formed in the base and communi- 20 eating, through a slot, with the inside of the body, whereby the torus maybe inserted or removed after the domelike bodyhas been formed.

In witness whereof, I have hereunto sub- 25 scribed my name.

MANDEL BLOCK.