Abstract:
A device comprising a collapsible container having a throat configuration registrable with a drain opening and a frangible seal acting to open when the collapsible container is collapsed as in directing the caustic contents thereof into a stopped up drain.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention: 
     This invention relates to means for opening stopped up drains and the like. 
     2. Description of the Prior Art: 
     Prior methods and devices for opening stopped up drains have comprised three general proposals. First the introduction of a mechanical element into the drain so as to forcefully move or remove the stoppage. Two, the attempted introduction of a caustic material into the stopped up drain by pouring the same thereinto and three, the introduction of pressure both hydraulic and pneumatic so as to forcefully remove the stoppage. 
     The invention combines the best features of the prior art and introduces device for applying hydraulic and pneumatic pressure to the stopped up drain together with a charge of a caustic material which is injected thereby into the area of the stoppage by a device containing the caustic material and collapsible when in registry with the drain opening to create the hydraulic and pneumatic and injecting pressures necessary. 
     SUMMARY OF THE INVENTION 
     A device for clearing a stopped up drain is disclosed in which hydraulic and pneumatic pressure along with an injected charge of a caustic material are introduced into a stopped up drain through a drain opening communicating therewith by a collapsible container for the caustic material and acting as a pressure generating unit when manually collapsed while in registry with the drain opening. 
    
    
     DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is an exploded side elevation of a collapsible caustic container and dual closures therefor with parts broken away and parts in cross section, 
     FIG. 2 is a vertical section through a portion of a drain opening illustrating the force generating and material injecting action of the collapsible container of the invention. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
     In its simplest form the device for clearing a stopped up drain comprise uses the forceful introduction of a caustic agent such as lye into a drain opening along with a pressure surge, both hydraulic and pneumatic and the device comprises a collapsible container 10 preferably cylindrical having a closed bottom end 11 and an exteriorly threaded throat 12. A relatively wide annular collar 13 is formed exteriorly of the throat 12 and the body of the container 10 between the throat 12 and the closed lower end 11 takes the form of a plurality of bellow-like collapsible sections 14. 
     The body 10 of the container is formed of a flexible resilient synthetic resin such as polypropelene or the like and as illustrated in FIG. 1 of the drawings is normally filled with a caustic compound 15 such as lye in powder or flake form. A first sealing disc 16 preferably of aluminum, is sealed at its peripheral edge to the upper end of the throat 12 and a second closure comprising a threaded cap 17 is positioned thereover and engaged on the threaded throat 12 to form a satisfactory package for the caustic material. 
     It will thus be seen that a container for a caustic material such as lye has been disclosed which is doubly sealed so as to be safe in handling. 
     By referring now to FIG. 2 of the drawings, it will be seen that the container and the caustic material therein are shown in use in the herein disclosed method of clearing a stopped up drain and wherein a drain pipe 18 is shown in communication with a sink 19 or the like and the container 10 is shown inverted and positioned with its threaded throat 12 partially within the drain pipe 18 and the relatively wide collar 13 forming a closure with respect to the open end of the drain pipe 18. 
     In FIG. 2 of the drawings the container 10 will be seen to have been largely collapsed by force directed against its inverted bottom 11 as by the hand of the user so that the bellows-like sections 14 of the body 10 are collapsed to the point where the caustic material 15 has been forced through the aluminum sealing disc 16 which is broken and injected into the drain along with the caustic material where it is consumed thereby as the caustic material 15 reacts with and dissolves the stoppage blocking the drain pipe 18. 
     In addition to the introduction of the caustic material 15 the action of collapsing the container 10 as shown in FIG. 2 applies a hydraulic and pneumatic pressure surge to the stopped up drain pipe 18 with the combined result that the caustic material is injected into the area of the stoppage and the drain opened thereby. 
     It will thus be seen that a device for clearing a stopped up drain has been disclosed which may be inexpensively formed and safely used and will be effective under the circumstances described in view of the dual action of the pressure surge and injection of the caustic material which occur when the collapsible container is collapsed when in communication with the stopped up drain. It will occur to those skilled in the art that the present method and device will work very well when submerged in water in a sink bowl in communication with a stopped up drain associated therewith.