|Publication number||US2128217 A|
|Publication date||Aug 30, 1938|
|Filing date||Jun 23, 1937|
|Priority date||Jun 23, 1937|
|Publication number||US 2128217 A, US 2128217A, US-A-2128217, US2128217 A, US2128217A|
|Original Assignee||Olof Anderson|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (9), Classifications (7)|
|External Links: USPTO, USPTO Assignment, Espacenet|
Aug 30, 1938. o. AND1-:weon 2,128,217
DRAIN PLUNGER Filed June 25, 1937 Patented Aug. 30, 1938 UNiTED Sintes PATENT OFFICE 6 Claims.
' This invention relates in general to a drain plunger and more particularly to a plunger device for clearing clogged drain pipes of sinks and the like. -An important object of the invention is to provide such a device which will operate more eiectively than similar devices provided heretofore and which lis adapted for manipulation in high or low positions. *Another important object of the invention is to provide a positive tWo way seal for such a device whereby the plunger is positively sealed during operation on compression and suction strokes.
Other objects of the invention will be apparent as the invention is better understood from the following description, which, taken in connection with the accompanying drawing, discloses a preferred embodiment thereof.
AReferring to the drawing:
Figure l is an elevational view illustrating a device embodying my invention, broken away in parts to show details of construction, and;
Fig. 2 is l an enlarged Sectional detail view taken substantially on line 2-2 in Figure l and illustrating my new sealing means in action.
To illustrate my invention I have shown a relatively strong cylinder 5 and piston 6, a sealing means orring l'attached to one end of the cylinder 5, an operating stem or rod 8 extending from'the piston B, and end handle 9, an intermediately disposed sleeve type hand hold I0, and a spring I2.
The cylinder 5 is or may be formed of sheet metal such as sheet iron which is die formed or spun to provide a cylinder of suitable length and diameter having an end wall 2l at one end only which is apertured as at 22 to receive the stem or rod 8.
The piston 6 may be any suitable plug arranged for attachment to the stem 8 and for movement in sea-ling engagement with the interior wall of the cylinder 5 and in the present embodiment I have shown the piston 6 formed of a die casting 45 and including a disklike body 23 having a relatively free l'lt in the cylinder 5 and a laterally extending hub 24. The periphery of the body 23 is grooved in spaced relationship to receive piston rings 25 of any suitable material. The piston 50 rings 25 may be formed of brass or a similar antifriction metal so that they will not dry out while the device is not in constant use.
An end 26 of the rod or stem 8 is reduced in diameter for a drive i'lt into a suitable bore formed 55 in the piston 6 as illustrated and may be riveted over upon assembly so that the piston kwill be rigidly secured to the stem and the opposite end 2l of the stem 8 is knurled and cast integral with the end handle 9. To facilitate this type of connection between the stem 8 and the handle 5 9 the latter is die cast and While the form oi' the handle 9 may be varied in accordance with particular requirements I have shown a cross bar type of handle having an axis disposed at right angles to the axis of the stem 8 and adapted to be grasped by the hand of an operator with the stem 8 extending between two fingers.
In accordance with one of the objects of this invention and to facilitate operation of the drain plunger in high or inconvenientl positions the hand hold l0 is provided. This hand hold may be formed of `a die casting of suitable length and diameter having a beaded or otherwise irregularly formed exterior surface which may be grasped by the hand O-f an Operator and upon which the hand even though wet will not readily slip while pressure is being applied to the plunger.
The handle lil is apertured to receive the stem 8 and is positioned thereon as indicated prior to the assembly of the stern il` and piston 6 and secured thereto by means of a suitable pin 28.
A cavity or spring socket 29 is formed in an end of the handle I0 for receiving the compression spring l2 as shown.
The compression spring I2 is positioned be- 30 tween the handle l@ and the end wall 2| of the cylinder 5 and is provided to normally hold the piston 5 in retracted position as shown and operation of the device is improved or balanced by a relatively heavy spring Which will absorb some energy on a down stroke of the piston 6 and release that energy to at least assist on the succeeding up stroke thereof.
In accordance with another object of this invention an effective two way sealing means is l provided whereby the cylinder 5 may be eifectively sealed against a Surface 3l as illustrated' in Fig. 2 by pressure applied to the plunger and vacuum in operation and to accomplish this I have shown the sealing ring 1 formed in accordance with my invention. The ring 1 is an annulus formed of a relatively soft elastic material having a relatively deep annular groove 32 formed therein for receiving an Open end portion 33 of the cylinder and a plurality of annular and concentrically disposed depending webs formed integral therewith including an inner webl 34, an outer web 35 and an intermediately disposed web 3B.
The inner web 34 and the outer web 35 are spaced laterally from the annular groove 32 so that when pressure is applied to the webs 34 and 35 the side wall portions 31 and 38 of the sealing ring l will be pressed tightly against the cylinder walls to improve the seal between the ring and the inner and the outer Walls of the cylinder.
The inner faces of. the webs 34 and 35 are tapered upwardly and inwardly from a relatively thin extremity so that when the sealing ring is pressed against a surface such as the surface 3l the webs will normally spread outwardly as illustrated in Fig. 2 when the web Bil will effectively seal against internal pressure on the down-stroke of the piston 6 and the web 35 will similarly effectively seal against external pressure applied as an incident to an up-stroke of the piston. The seal effected being of the iiap valve type in which the applied pressure improves the seal by pressing the webs 34 and 35 against the surface 3l in proportion to the applied pressure.
The intermediate web 36 is provided as an auxiliary sealing means and may by bending toward one side or the other compensate for damage to the web 34 or the web 35 or for imperfect sealing of either one thereof which may be due to surface irregularities or particles of matter interfering with proper operation thereof.
The plunger may be positioned over the opening of a clogged drain pipe in a sink or the like and pressed rmly against the surface of the sink when forceful operation of the piston 6 both upwardly and downwardly will clear the clogged drain.
The opening 22 in the wall 2l of. the cylinder 5 is of ample size to provide a vent through which air back of the piston 6 may be vented and likewise taken in during the down-stroke of the piston.
Due to the rigidity of the cylinder 5 and piston 6 and to the eiciency of the sealing means a powerful pressure or suction may be applied to dislodge the materials in clogged drain pipes.
It is thought that the invention and many of its attendant advantages will be understood from the foregoing description, and it will be apparent that various changes may be made in the form, construction, and arrangement of the parts without departing from the spirit and scope of the invention, or sacrificing all of its material advantages, the form hereinbefore described being merely a preferred embodiment thereof.
1. The combination with a drain plunger of the open ended metal cylinder type, of sealing means for sealing the open end thereof against a surface disposed about a drain opening, said sealing means comprising an annulus of elastic material having a mean diameter substantially equal to that of the open end of said cylinder and bein-g adapted for sealing engagement therewith, said annulus having a plurality of relatively thin sealing webs dependent therefrom and being adapted to spread apart on and to seal against a fiat surface upon the application of pressure thereto through said cylinder.
2. The combination with a drain plunger o1' the open ended metal cylinder type, of sealing means for sealing the openvend thereof against a surface disposed about a drain opening, said sealing means comprising an annulus of elastic material having a mean diameter substantially equal to that of the open end of said cylinder and being adapted for sealing engagement therewith, said annulus having a plurality of concentrically disposed relatively thin and long sealing webs formed integral therewith and extending from said cylinder for sealing engagement with a relatively flat surface upon the application of pressure through said cylinder.
3. The combination with a drain plunger of the open ended metal cylinder type, of, sealing means for sealing the open end thereof against a surface disposed about a drain opening, said sealing means comprising an annulus of elastic material having an annular groove therein for receiving the open end of said cylinder and having an inner and an outer sealing web extending therefrom for engaging a relatively flat surface, said annular groove being adapted to form a sealed connection with said cylinder and said sealing webs being adapted to spread apart against a relatively flat surface to form a seal against internal and external pressure during operation.
l. A drain plunger comprising a cylinder adapted for sealing engagement with a relatively flat surface disposed about a drain opening, a piston in said cylinder, and means for actuating said piston including an operating stem attached tosaid piston and having an end handle, a helical spring mounted on said stem for normally retracting said piston, and an intermediately located sleeve providing a hand hold whereby the piston may be actuated.
5. A drain plunger comprising a cylinder adapted for sealing engagement with a relatively flat surface disposed about a drain opening, a piston in said cylinder, and means for actuating said piston including an operating stem attached to said piston and having an end handle cast integral therewith, a helical spring for normally retracting the piston, and an intermediately located hand hold device mounted on said stem and having a socket therein for receiving an end of the helical spring.
6. A drain plunger comprising a cylinder adapted for sealing engagement with a relatively nat surface disposed about a drain. opening, a piston in said cylinder, means including a stem connected to said cylinder and an operating handle thereon for actuating said cylinder, and a helical spring for normally retracting said piston and being arranged on said stem between said cylinder and the operating handle.
|Citing Patent||Filing date||Publication date||Applicant||Title|
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|US4137578 *||Oct 8, 1976||Feb 6, 1979||Felici John D||Kitchen scoop and plunger|
|US4186451 *||May 25, 1978||Feb 5, 1980||Ruo Chen Min||Plastic sanitary pump|
|US4585201 *||Jul 23, 1984||Apr 29, 1986||Pursell Richard A||Christmas tree stand|
|US4733414 *||Oct 2, 1986||Mar 29, 1988||Wilkes Karl A||Spring loaded drain cleaning device|
|US5353442 *||Jan 6, 1994||Oct 11, 1994||Rapid Action Equipment Limited||Rapid action plunger|
|US5645522 *||May 4, 1993||Jul 8, 1997||The Regents Of The University Of California||Devices and methods for controlled external chest compression|
|US6618873 *||Jan 22, 2002||Sep 16, 2003||Brian Mulgrew||Automatic feed waste disposal tool|
|WO1996001344A1 *||Jun 8, 1995||Jan 18, 1996||Torres Francisco Parra||Improved clearing device for drains|
|U.S. Classification||4/255.2, 285/9.2, 285/110|
|International Classification||E03C1/308, E03C1/12|