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The present invention relates generally to apparatus for removing obstructions from sewers, drains and pipes. More particularly, the present invention relates to jetter nozzles that emit a strong stream of a fluid for the purposes of removing obstructions.
Prior methods for removing build-up or obstructions from sewers, pipes and drain lines include the use of chemicals, mechanical cutters, and jetter nozzles. A jetter nozzle is connected to a hose and a water supply. The jetter nozzle advances forwardly in a sewer line or pipe by spraying jets of water rearwardly and radially outwardly at an angle from horizontal. A jetter nozzle typically provides for a single forwardly directed stream of water. However, the bulk of the cleaning action is limited to along the walls of the pipe or sewer line rearwardly of the nozzle. The cleaning results from the rearwardly directed streams of water impinging on the pipe or sewer wall. Although the forwardly-directed stream is capable of eroding a hole through certain materials, such nozzles have difficulty impinging the sewer wall. Jetter nozzles are typically used for removing build-up that is relatively soft, such as grease or organic waste.
In the past, jetter nozzles have been known which have inadequate performance. In these prior art jetter nozzles, the outside shape of the nozzle inhibits the ability to corner in rough and small diameter pipe elbows. The back jets typically have an angle of greater than 25 degrees. As such, it provides less pulling force while being directed through the pipe or sewer. These prior art jetter nozzles have an excessive length which is caused by a poor matching of thread depths, the depth of the internal seating surface, and the washer thickness. This inhibits cornering in short radius elbows. Additionally, the selection of nozzle orifice size is not optimized for use with consumer pressure washers.
In the past, various patents have issued with respect to such jetter nozzles. For example, U.S. Pat. No. 3,165,109, issued on Jan. 12, 1965 to P. Hammelmann, describes an apparatus for the cleaning of sewer systems. This apparatus includes a hose, a nozzle carried by the end of the hose, and a means connected to the hose for supplying cleaning fluid thereto under pressure. A guiding means guides the hose for insertion into a sewer pipe. A cable is attached to the hose adjacent to the nozzle and is guided by the guiding means.
U.S. Pat. No. 3,535,161, issued on Oct. 20, 1970 to R. J. Gutrich, teaches a process and apparatus for clearing sewer lines and the like by application of water at normal household pressures through flexible tubing to a jet-creating head that is connected to the end of the tubing. The jet-creating head is inserted into and passed through the line by means of the tubing. There is a first axial jet head for opening up a passage through the line and a second tangential or swirl jet head for thoroughly cleaning the line.
U.S. Pat. No. 4,322,868, issued on Apr. 6, 1982 to J. C. Wrster, describes a sewer and catch basin cleaner that includes a system for injecting water under pressure into a sewer for cleaning the sewer and a vacuum loading system for removing water and debris from the sewer catch basin. The cleaner includes a water storage tank for providing the cleaning water and a body for receiving the material removed from the catch basin or manhole.
U.S. Pat. No. 5,988,188, issued on Nov. 23, 1999 to J. C. Born, provides a method and apparatus for removing obstruction from sewers without cutters or chemicals. A forwardly-thrusting nozzle is adapted to spray jets of high-pressure, high-temperature water or steam. The nozzle is connected to a hose. The nozzle and hose are inserted through adapter fittings to exit from the outlet opening into a leg of the sewer having the obstruction. A hot water/steam supply connected to the upstream end of the hose provides a supply of steam or hot, pressurized water to the nozzle. The nozzle is advanced through the sewer line to remove the build-up from the sewer walls with the aid of the jets of water.
U.S. Patent Application Publication No. 2016/0089703, issued on Mar. 31, 2016 to the present inventor, describes a sewer jetter apparatus. The sewer jetter apparatus includes a sewer jetter attachment and a sewer jetter hose. A coating is provided over a joint formed by the sewer jetter attachment and the sewer jetter hose. The coating provides a smooth sloped transition between the sewer jetter attachment and the sewer jetter hose. The coating enables improved performance of the sewer jetter apparatus during retraction of the apparatus from a pipe.
It is an object of the present invention provide a jetter nozzle that has improved performance.
It is another object of the present invention to provide a jetter nozzle that can travel further in the drain, pipe or sewer.
It is another object of the present invention to provide a jetter nozzle that can pass through various sizes of elbows and traps.
It is another object of the present invention to provide a jetter nozzle that has an improved seal and has reduced leakage.
It is still another object of the present invention to provide a jetter nozzle that has a greater pulling force.
It is another object of the present invention to provide a jetter nozzle that has improved cornering ability in rough and small diameter pipe elbows.
It is still another object of the present invention provide a jetter nozzle that is adapted to consumer pressure washers.
These and other objects and advantages of the present invention will become apparent from a reading of the attached specification and appended claims.
The present invention is a jetter nozzle that comprises a body having a shape of a prolate ellipsoid. The body has an internal bore opening at one end thereof. The bore is adapted to receive an end of the hose therein. The body has an internal shoulder in the internal bore. A plurality of orifices communicate with the bore and open at the exterior of the body. An internal seal is juxtaposed against the shoulder.
The internal bore has a first portion extending from the shoulder to the end of the body and a second portion extending from the shoulder toward an opposite end of the body. The first portion of the internal bore has a diameter greater than a diameter of the second portion of the internal bore. At least some of the plurality of orifices have a first end opening to the second portion of the internal bore and a second end opening to the exterior of the body rearwardly of the first end. Each of the plurality of orifices extends at an approximately 25 degree angle with respect to the longitudinal axis of the body. The body has a planar surface of an opposite end of the body. One of the plurality of orifices open at the planar surface.
The exterior of the body has wide diameter portion and a narrow diameter portion rearwardly of the wide diameter portion. At least some of the plurality of orifices open at the narrow diameter portion. The plurality of orifices comprises three orifices circumferentially spaced approximately 120 degrees from each other or four orifices circumferentially spaced ninety degrees from each other. One of the plurality of orifices can open at an opposite end of the body.
The internal seal is of a thermoplastic material, such as polyetra fluoroethylene, polyethylene terephthalate, nylon or similar materials. The first portion of the internal bore is internally threaded.
The present invention is also a jetter assembly that comprises that a body having a shape of a prolate ellipsoid, an internal seal juxtaposed against a shoulder within an internal bore of the body, and a hose having a coupling at one end thereof. The coupling is received in the internal bore and is in compressive bearing relationship against the internal seal. The internal bore opens at one end of the body. The body has a plurality of orifices communicating with the bore and opening at the exterior of the body. The internal bore is internally threaded. The coupling of the hose has an external threads engaged with the internal threads of the internal bore.
This foregoing Section is intended to describe, with particularity, the preferred embodiments of the present invention. It is understood that modifications to these preferred embodiments can be made within the scope of the present claims. As such, this Section should not to be construed, in any way, as limiting of the broad scope of the present invention. The present invention should only be limited by the following claims and their legal equivalents.
Referring to
The stream of fluid 22 is projected from the forward end 24 of the jetter nozzle 16. This forward jet of fluid 22 is intended to removed soft obstructions that lie in front of the moving jetter nozzle 16. Although the stream of fluid 22 can facilitate the ability to better move the jetter nozzle 16 within the pipe, it is been found that the jetter nozzle assembly 10 can operate efficiently and effectively without the forwardly-projecting fluid stream 22. The jetter nozzle 16 is moved forwardly within the drain, pipe or sewer by the force of the fluid streams 18 and 20 and by moving the hose 12 forwardly.
The internal bore 42 has a first portion 56 and a second portion 58. The first portion 56 extends from the shoulder 46 to the end 44 of the body 40. The second portion 58 extends from the shoulder 46 toward the opposite end 24 of the body 40. The first portion 56 has a diameter greater than a diameter of the second portion 58.
In
The body 40 has the wide diameter portion 34 and a narrow diameter portion 36. Each of the orifices 48 and 50 open at the narrow diameter portion 36. When a fluid, such as water, is introduced under pressure into the internal bore 48, it will flow through the opening 32 of the internal seal 30 and into the second portion 58. The water will then be ejected, under pressure, from the second portion 58 of the internal bore 42 and outwardly through the orifices 48, 50 and 52. The fluid passing outwardly of the orifices 48 and 50 creates a strong pulling and shearing force. The fluid that is ejected through the orifice 52 is intended to remove obstructions. Within the concept of the present invention, it is possible to omit orifice 52. The removal of orifice 52 will increase the pressure passing through the orifices 48 and 50 (along with the orifice that is not shown). As such, there is a greater pulling and shearing force emitted by these orifices. The omission of orifice 52 would avoid a counter force (caused by the forwardly projecting fluid) to the pressure from the orifices 48 and 50.
The foregoing disclosure and description of the invention is illustrative and explanatory thereof. Various changes in the details of the illustrated construction can be made within the scope of the appended claims without departing from the true spirit of the invention. The present invention should only be limited by the following claims and their legal equivalents.