WO2000009935A1 - Grip coupling - Google Patents
Grip coupling Download PDFInfo
- Publication number
- WO2000009935A1 WO2000009935A1 PCT/US1998/017035 US9817035W WO0009935A1 WO 2000009935 A1 WO2000009935 A1 WO 2000009935A1 US 9817035 W US9817035 W US 9817035W WO 0009935 A1 WO0009935 A1 WO 0009935A1
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- WO
- WIPO (PCT)
- Prior art keywords
- pipe
- coupling
- coupling body
- ring
- end portion
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
- F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
- F16L37/088—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of a split elastic ring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L21/00—Joints with sleeve or socket
- F16L21/08—Joints with sleeve or socket with additional locking means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
- F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
- F16L37/088—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of a split elastic ring
- F16L37/0885—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of a split elastic ring with access to the split elastic ring from a radial or tangential opening in the coupling
Definitions
- the invention is in the field of full grip couplings for the attachment of end portions of pipes to carry fluid, and for pipe fittings, pipe dead ends, valves and valve covers, pressure vessels, structural pipe, electrical conduits, wherein the end portion to be coupled to or attached to has a circumferential groove from the end of the element, which mates with the coupling to secure it to the element and prevent axial movement of the element with respect to coupling.
- the invention also includes the couplings to attach smooth ended pipes.
- the coupling connecting the two pipes is made of different metal from the pipes, then, to prevent electrolysis, it is desired that the same fluid does not come in contact with the coupling and the pipes.
- the couplings currently in use employ a seal which is mounted around the end portions of pipes to break the fluid contact with the coupling which requires considerable amount of work before the coupling can be mounted around the pipes to enclose the seal.
- the seal invented for the couplings in this invention are mounted in an enclosure created between the ends of the pipes and the inner surface of the coupling body. Thus, pipes are merely pushed into the coupling to enclose the seal.
- the new coupling is lighter in weight than my previous invented coupling, and also more economical to construct.
- groove will also be understood to include plane end pipe having no groove, and will pertain to grooves or shoulders on the end portion of pipes, grooves in the inner end portions of the coupling body.
- the word Pipe includes all other circumferen- tial elements with or without a circumferential groove which might be coupled by the coupling.
- This invention works on the mathematical principle that the difference in the circumferential length of any two circles equals 3.1416 (D1-D2) , where Dl and D2 are the diameters of the circles.
- D1-D2 3.1416
- the preferable means to accomplish the task of flexing the ring to a larger diameter in this invention are a bolt and an arcuate piece or a bolt, an arcuate piece and two mini arcuate levers or a bolt and two mini arcuate levers.
- the combination which is chosen depends on the size and design requirement of the coupling. With aid of a bolt passing through a cover covering a cavity, the arcuate piece and two mini arcuate levers are used to pry open the open ended ring to a larger diameter than its original diameter.
- the action of the bolt on the arcuate piece and the mini levers create two opposite moments in the opposite end of the resilient ring, which resist the opening of the ring and make the ring to swing back to its original position once the levers are uncommissioned.
- the two mini levers in a vertical radial section of the coupling appear as an inverted "V" with its spread oriented toward the axis of the coupling and footed on two arcuate ridges with their radius center toward or on the axis of the coupling.
- the mini levers are put in a movable locked position hemmed between and among elements; including two walls of a cavity created in the end of the coupling, an arcuate piece, two open end portions of a resilient ring emerging from the groove in the end portion of the coupling, and two oppositely situated arcuate ridges with their center toward or at the axis of the coupling.
- a coupling for attachment to the end of a pipe having a circumferential groove includes a coupling body with a receiving opening therein so that the coupling body closely receives and surrounds the end portion of a pipe to be coupled.
- the groove in the end portion of the pipe is brought to a position to coincide with the corres- ponding opposite inner groove in the end portion of the coupling, partially housing an open-ended resilient ring in the groove in the inner body of the coupling.
- the outer edge away from the center of the coupling defining the inner diameter of the ring is rounded to a degree to facilitate the receiving of the pipe into the coupling.
- the inner diameter of the ring is less than the inner diameter of the coupling.
- the outer diameter of the inner groove i.e.
- the diameter nearest the axis of coupling) in the end portion of the coupling is also the inner diameter of the coupling.
- One is, simply to push the pipe into the receiving end opening of the coupling until it coincides with the corresponding opposite groove in the end portion of the coupling.
- the resilient open ended ring flexes to a larger diameter inside the inner groove of the coupling body, then swings back to its original diameter as soon as the groove inside the coupling body coincides with the groove on the end portion of the pipe.
- the second mode is by means located inside of a cavity situated in the end of the coupling.
- the means is an assembly of components installed in a cavity created in the end of the coupling body covered by an arcuate cover fastened to the coupling body by means of bolts.
- the assembly consists of a bolt, an arcuate piece and two mini levers positioned in a form of inverted "V" shaped either from a single piece of material or from two distinct pieces.
- the mini levers are located in a movable locked position hemmed between and among elements; including two walls of a cavity created in the end of the coupling; an arcuate piece; two open end portions of a resilient ring, and two parallel oppositely situated arcuate ridges.
- the action of the bolt on the movable arcuate piece transmits force to push apart the two end portions of the resilient ring and also forces the mini levers to slide and spread their feet which are footed to slide on the two said arcuate ridges inside the cavity.
- the ring is pushed along the direction of the bolt and against the coupling body inside of the groove on the other side of the coupling, directly opposite to the two open ends of the ring.
- the bolt can keep the open-ended resilient ring in an expanded position to a desired diameter till the ring is brought back to its original diameter by mounting it into the opposite groove on the end portion of the pipe.
- driving means to flex the ring to a larger diameter than its original diameter need to be only a driving bolt passing through a cover and movable an arcuate piece, but in other applications said bolt, and an arcuate piece and the two mini levers will be needed, yet in other applications two mini levers and said bolt are sufficient.
- the two bolts provided to secure the cover to cover the cavity also assist in securing the resilient ring to the pipe, with a tight grip, or in securing the ring with a tight grip to the pipe having a plane surface in the end portion of the pipe.
- more than two of the above mentioned bolts may be included to provide a still tighter grip than that is possible with only two said bolts.
- a single arcuate cover can be provided to cover the two cavities situated oppositely in the end of the coupling body, or it can be made to provide not only the covers for two said cavities but also can provide the two outer walls each wall bearing a arcuate ridge as well. Such a cover needs only a single bolt to fasten it to the outer body of the coupling. It is equally possible that individual cover for each cavity can be made to provide not only a cover for the cavity but also provide an outer wall bearing a arcuate ridge.
- the open-ended resilient ring can vary from one application to an other application, and also thickness of the ring can vary from section to section. In extreme variation in thickness of the resilient ring may look like a gear. It is also understood that by widening the width of the resilient ring, arcuate rows of gripping teeth in the inner surface of the ring can be provided which can bite into plastic or rubber pipe.
- the body of the coupling can be made either from a arcuate tube or from two arcuate pieces of high strength material, held in place to make the coupling body by means of bolts or by dovetail joints or by welding together the two pieces.
- the coupling of this invention can be incorporated within the inlet and outlet of a valve as one of the components of the valve, or the valve can be incorporated in the coupling of this invention.
- a lopsided trapezoidal seal bearing a slanting arcuate slit in its inner surface is enclosed in an enclosure provided by the ends of the pipes and the inner surface of the coupling body.
- FIG. 1 is a transverse vertical section of the coupling of FIG. 2 taken on line 1-1 of FIG. 2;
- FIG. 2 the longitudinal vertical section taken through a coupling of the invention used for joining two pipes or any two elements having an end-to-end relationship, and showing the two joined pipes;
- FIG. 3 the view of the lever in FIG. 2 is duplicated for clarity
- FIG. 4 the longitudinal vertical section of a valve, where the coupling incorporates the valve, and also where the coupling makes the cover for the valve;
- FIG. 5 a longitudinal section of a coupling which has on its one end a connector made of a movable set of cammed jaw members, which I have patent under Patent Number 5,387,017;
- FIG. 6 a longitudinal section of the coupling used in the structural pipe system where the coupling joins two pipe;
- FIG.7 a longitudinal section of a valve where the coupling joins two parts of the valve by becoming a component in the structure of the valve, and where the coupling also incorporates the valve (body) while joining two pipes;
- FIG. 8 the vertical section of two arcuates used in the construction of the body of the coupling
- FIG.9 a longitudinal vertical section of the coupling used to join two hoses
- FIG. 10 an enlarged transverse vertical partial section to further clarify FIG. 1 and FIG. 2, and the alternative design of the cavity to accommodate the assembly used to open- the-open ended resilient ring to a larger diameter than its natural diameter;
- FIG. 11 is the same as FIG. l, but only arcuate piece driven by a bolt is employed to act on the open end portions of the resilient ring to make the coupling operative;
- FIG. 12 the same FIG. 10, except that instead of an arcuate piece on one end they are movably hemmed in by a bolt;
- FIG. 13 is the view of the mini lever 9 looking at it by taking a longitudinal vertical section 2-2 through the bolt and the coupling body of FIG. 12;
- FIG. 14 is the view of the mini lever 9 looking at it by taking a longitudinal vertical section 2-2 through the bolt and the coupling body of FIG. 10;
- Fig. 15 is a transverse vertical section of mini levers 9 and 10 made integrally from a single piece of material;
- FIG. 16. is a longitudinal vertical section of a coupling similar to the coupling shown in FIG. 5, which connects pipe and a reducer.
- the invention may take the form of the coupling having two inner grooves 6K and 6L in the end portions of the coupling, housing two respective open-ended rings 7 and 22 with their inner diameters less than the inner diameter of the cylindrical coupling body 6 for joining the ends of two pipes together in an end-to-end relationship.
- Pipes 2 and 3, in FIG.2, are provided with circumferential grooves 2C and 3C, respectively, in respective end portions of the pipes.
- the coupling 6 is made of a length to extend over groove 2c in the end portion of pipe 2, and groove 3c in the end portion of pipe 3 when the ends 2D and 3D of pipe 2 and 3 are received in the cylindrical receiving opening 6B within the body 6.
- the Coupling body 6 bridges the ends of the pipes 2 and 3 to be joined and is made of a material to withstand the maximum pressure to which the pipe will be subjected.
- the cylindrical body of the coupling may be formed from a tube or from two arcuate pieces 39 and 40 shown in FIG.8, which are held together by bolts or by two dovetail joints of types 41 or 43.
- Inner and outer pertaining to the diameters of the grooves in the inner body of the coupling and the grooves on the end portions of the pipe, and pertaining also to the resilient ring will be understood with meanings as follows: Inner diameter means the diameter nearest to the axis of the coupling and outer diameter means the diameter farthest from the axis of the coupling.
- the fit of the rings is designed to keep the rings housed inside the grooves 6K and 6L of the coupling body by making the outer diameters 7A and 22A of rings 7 and 22 larger than the inner diameter 6B of the body of the coupling, which diameter 6B equals the inner diameters of grooves 6K and 6L.
- the inner diameter 7B and 22B of rings 7 and 22 is less than the outer diameters 2A and 3A of pipes 2 and 3.
- the ring 7 may differ in thickness from a section to an other section as is shown by crescent 7H taken out the ring 7 in FIG. 1.
- the pipes 2 and 3 which are joined have corresponding circumferential grooves 2C and 3C in the end portions of the pipes to coincide with the grooves 6k and 6L in the respective end portions of the coupling.
- the mechanism which locks and unlocks the coupling to the pipe is made of an assembly of components; bolt 8, an arcuate piece 15, and two mini levers 9 and 10, and ridges P and 6N shown in FIG. 1 and FIG. 2.
- the thickness of the toes 9C and 10C of mini levers 9 and 10 is predetermined so that toes would not slip underneath the end portions of the resilient ring 7, and get locked.
- an arcuate piece 15 driven by the bolt 8, which passes through cover 4 is sufficient to make the invention operative.
- mini levers 9 and 10 also are required for the invention to be operative, and still in other applications as shown in FIG. 12, bolt 8 and arcuate mini levers 9 and 10 will be enough to do the job.
- To use or not to use mini levers depends strictly on the design of the resilient ring, and the geometry of its two curved open ends and their strength, and the strength of the ring.
- FIGS. 5, 8, 13, 14, 15 and 16 will be explained simultaneously in terms of the vertical section in FIG. 1 because of the sameness of the assembly mechanism on both ends of the coupling to drive the mini levers 9 and 10. While the assembly mechanism in FIG. 1 is being explained, it is understood that the assembly mechanism on the opposite end of the coupling is also being explained simultaneously.
- the most important features of an assembly mechanism are made of a bolt 8, an arcuate piece 9 and two mini levers 9 and 10, and two arcuate ridges P and 6N.
- mini levers 9 and 10 are curved as shown in FIGS. 10, 12 and 15.
- Mini levers are made from rigid material of high strength to withstand pressure the levers would be subjected to.
- the mini levers as shown in FIG. 15 can be made from a single piece of resilient material of high strength, and the stock of material from which the mini levers are made is thinned out in the middle so that it would not provide much resistance against the functioning of the mini levers.
- the mini levers provided by a single piece act like a spring lever.
- the geometric design of the mini levers is dependent on the height and width available in said cavity.
- the mini levers 9 and 10 are put in a movable locked position hemmed between and among elements in a cavity 11 constructed in the end of the coupling body 6.
- the cavity 11 is delineated by sections 6F and 6G in the coupling body and the inner surface of an arcuate cover 4.
- the cover 4 is shown by 4D, 4E, 4F and 4G with a threaded opening 4A for the two way bolt 8.
- the two sides of cavity 11 are shown by 6F and 6G and the depth of the cavity is marked by 6H and 6J.
- the depth of the cavity in FIG.l equals the thickness of the coupling body 6. If required, the depth of the cavity can be increased by increasing the depth of the cover 4 as depicted by 11A in FIG. 10, where cover 4 for the cavity is provide extra height by its raised ends 4D and 4F.
- the cavity 11 is covered by an arcuate cover 4 fastened to the coupling body 6 by means of bolts 5 and 5B.
- mini levers 9 and 10 On one end, away from the axis of the coupling, two mini levers 9 and 10 having their two ends 9A and 10A juxtaposed and on the other end their feet are spreaded on a arcuate ridge P as shown by their curved toes 9C and IOC.
- Mini levers are placed in an inverted "V" position, and are hemmed by an arcuate piece 15 located inside the cavity 11 next to the cover 4, and on the opposite side their spread is checked by two parallel oppositely constructed arcuate ridges P and 6N in cooperation with two open ends 7D and 7E of a resilient ring 7.
- An arcuate piece 15 preferably will have flat surface next to the threaded opening 4A.
- the geometric design of the two end portions of ring 7 can differ from the design shown in the drawing figures. It is preferable to enlarge the outer diameter of the groove 6C adjacent to the two sections 6F and 6G in FIG. 1. to create an extra space for the two end portions of the open-ended ring to flex extra distance freely when they are being opened apart.
- the length of the arcuate piece 15 in FIG. 1 is marked by 15A and 15B, and its two arms 15C and 15D are held in close fit through two openings through the body of the cover 4.
- the arms 15C and 15D can slide only toward or away from the axis of the coupling.
- To drive the assembly is a special two way bolt 8, with two ends 8A and 8B and an integral flat portion 8C dividing the stem of the bolt into two unequal parts, where the length of one part toward the end 8A of the stem is equal to or less than the thickness of the cover 4 , and the length of the second part of the stem toward the end 8B is greater than the thickness of the cover.
- Said second part with end 8B is used to drive the two mini levers 9 and 10 in the assembly toward the axis of the coupling through an intermediate arcuate piece 15 thus forcing the two levers to spread their feet on and along two oppositely constructed parallel ridges P and 6N shown in FIG 1, in doing so the ring 7 opens apart and also slips away to the opposite end inside of the groove in the inner body of the coupling.
- the short stem of Bolt 8 toward end 8A cannot act on said assembly by virtue of its limited length.
- the first step in both the first and the second mode is to drive two bolts 5 and 5B partially backward, receding the two ends 5A and 5C of the bolts into the coupling body 6 which frees the resilient ring from the bolts completely.
- the length of the bolts 5 and 5B will be such that they will remain outside groove 6C, thus there will be no need to recede them to free the ring.
- the resilient ring can be further tightened with the aid of two bolts 5 and 5B passing through two holes in the cover 4, which are also held in two corresponding threaded openings 6D and 6E through the body of coupling 6.
- Driving in the bolts 5 and 5B acts on ring 7 by moving the ends 5A and 5C of the bolts forward toward the axis of the coupling to press the ring 7 against pipe 2.
- the bolts 5 and 5B which are used in fastening the cover 4 to the coupling body 6 are also used to lock the ring 7 in place and force the ring to grip firmly against pipe 2.
- the angles of the bolts 5 and 5B, through the cover 4 and the coupling body 6, can be different in different applications.
- Bolts 20 and 21 can be of the same type as the bolts 5 and 5B.
- the resilient ring 7 shown in FIG. 1 is pushed into the groove 6K by means of the bolt 8 and two levers 9 and 10 described above in the assembly.
- the end 8B of the bolt 8 is screwed into the threaded opening 4A to push the arcuate piece 15 toward the axis of the coupling which transmits force to the mini levers 9 and 10 and causes 9C and 10C, the already spreaded feet of the levers, to spread still further apart.
- a bar attached to other mechanical means may be used to exert a force on the levers where remote control is needed to release the pipe.
- the spread between feet 9C and IOC of levers 9 and 10 on two arcuate and oppositely parallel ridges is preset such that, under the acting force of bolt 8 through intermediate arcuate piece 4, the feet slip further apart without any resistance and frees the resilient ring 7 from the groove 2C of the pipe.
- the mini levers 9 and 10 act on two opposite shifting points 9B and 10B on end portions 7D and 7E.
- the ring 7 flexes to a new larger diameter as it is pried and pushed apart by the levers 9 and 10, and it assumes its new position inside groove 6K in the body of the coupling. Ring 7 can be kept in this new position as long as it is desired.
- the location of the points 9B and 10B depends on the position of the spread of the feet 9C and 10C of the mini levers 9 and 10. Then bolts 5 and 5B are tightened to tie ring 7 in place and causing it to grip the pipe firmly.
- the bolt 8 is taken out of the opening 4A and is threaded again into the same opening 4A by orienting the end 8A toward the axis of the coupling; thus the bolt is uncommissioned until it is required to drive the assembly mechanism again.
- arcuate piece 15E can act simultaneously along with the action of mini levers 9 and 10 up on ring 7 to push apart the ring or they can be designed with delayed action where 15E may act before the acting of 9 and 10 and vice versa.
- the arcuate piece 15 can push apart the ring 7 without mini levers 9 and 10, but it is determined that in some instances their combination is desirable and is highly efficient.
- a gap may be allowed between the ends of the pipes 2D and 3D, mounted inside the coupling body, or they may touch each other.
- Different types of seals can be used to seal the leakage from the coupling.
- Invented seals 14 and of types 12, 12A are shown to illustrate the concept of sealing the coupling against leakage.
- the disconnecting of the pipe from the coupling is the reverse of the operation performed to connect the pipe to the coupling.
- the bolt 8 with its end 8B is driven into the threaded opening 4A to drive said arcuate piece and mini levers downward toward the axis of the coupling to push apart said ring, and causing the levers to spread their feet 9C and 10C to a greater distance between them.
- FIG. 3 duplicates the view in FIG. 2 for clarity, and it shows mini lever 9 with arcuate piece 15 and 15A.
- the boundary of cavity 11 is shown by 11D.
- the gap lie all around between the wall of cavity 11 and mini lever 9 is exaggerated.
- Two ridges on which foot 9C stands to slide are shown by P and 6N. Bottom width of Mini lever 9 approximately equals the width of the groove 2C plus the width of ridges P and 6N.
- FIG. 4 shows couplings used as lids 23 and 24, and a valve is incorporated into the coupling to join pipes 2 and 3.
- the seals are shown by 26 and 26A and 23A and 24A.
- the partition of the valve is shown by 29. Rings 7 and 22 are shown in locked position in grooves 6K and 6L. It is clear that coupling 6 with dead end 23 can make a lid to any pressure vessel.
- FIG 5 shows the compound coupling 55A connecting two pipes 2 and 3.
- the compound coupling has one regular end of the invented coupling and the other end of the coupling has a connector made off a set of jaw members (of my invention Patent Number 5,387,017), which set includes jaws 71 and 73.
- jaws are mounted for limited movement with respect to the coupling body around the central axis of the receiving end opening of the coupling.
- Jaw members are fixed in movable position around the coupling body with the aid of a groove 55D and also are positioned against the face 55C of the coupling.
- the jaw members include camming surfaces which mate with camming surfaces of the coupling body so that as the jaw members move around the receiving opening in one direction, they also move to closed position, but as they move in the opposite direction, they move to open position.
- the camming surfaces of the jaw members are bolts and pins not shown in the figure extending through the jaw members into receiving slots like 72, 73 in the coupling body which form the mating camming surfaces of the coupling body and vice versa.
- the compound coupling has a resilient ring 7 in its one end portion and movable jaw members at the other end to connect two pipes. Whether, this coupling is used with pipes or with hoses the user has preferred choice which connector he or she would prefer to use when one end of coupling always remain connected in place.
- the compound coupling has distinct cost effective advantages in some applications.
- the means lodged in said cavity to move the resilient ring are not shown.
- the ring works the same as explained else where.
- the invented lopsided gasket and the enclosure for it makes the connecting and disconnecting of the pipes extremely easier than before.
- FIG. 6 shows a coupling connecting two structural pipes 2 and 3 separated by a ring 36. Rings 7 and 22 are shown in their open positions. The grooves are shown by 2C, 6K, 3C and 6L.
- FIG. 7 shows where a valve incorporates coupling 6 as a component which makes the cover of the valve, and cover has rings 7 and 22 which attach the cover to other two parts 6Y and 6Z of the valve body.
- Part 6Y and 6Z function as coupling to attach the valve body to the pipes 2 and 3.
- Seals are shown by 26, 26A, 37 and 38, and the partition of the valve is shown by 29. All other elements have been explained earlier in other FIGS.
- the rings 7 and 22 are shown in unlocked position. Grooves are depicted by 2C, 6K, 3C and 6L.
- FIG. 8 shows where two arcuate pieces 39 and 40 are joined along lines 45 and 46, and are used to make the coupling's arcuate body.
- Two types of dovetail joints are shown, one of which is depicted by a wedge 41, with arms 41A and 41B, and the other by a wedge 43, with arms 43A and 43B.
- Bolts 42 and 44 prevent an axial movement of 41 and 43.
- These bolts can also be located outside the coupling body, in that case, two bolts will be needed; one on each end of the wedge, to prevent the movement of the wedge.
- the inner groove is shown by 6C, Fig. 1.
- the coupling body also can be made from two arcuate pieces each having two radial flanges which can be tied together by means of two bolts. Where two arcuate pieces are used with O-rings on the pipes, an inner lining will be used to prevent leakage between the two pieces.
- FIG. 9 shows where coupling 6 is used to connect two hoses (hoses not shown) by means of connecting the inserts 47 and 48 which go into the hoses.
- Ring 7 of coupling 6 and groove 6K are the same as in FIG. 1 and FIG. 2.
- the seal is shown by 49.
- the coupling 6 is shown in the locked position.
- FIG. 10 is the same as FIG. 1, but ring 7 is not shown in its entirety, only the modified end portions are shown from P2 to 7D and from P3 to 7E.
- mini levers 9 and 10 are shaped into arcuate pieces which are partially located inside the extended cavity 11A.
- arcuate piece 15E is located in the extended cavity 11A and is shown to be in contact with the end portions 7D and 7E at points 15G and 15H.
- the arcuate piece 15E and mini levers act almost in unison against end portions of ring 7 at points 15G, 15H, 9B and 10B to push and to open up the ring.
- gap is designed at points 15G and 15H or gap is allowed between said mini levers and 15E while 15E touches 7D and 7E at points 15G and 15H.
- cavity 15F which is provided for end 8B of bolt 8 and by virtue of the location of 15E between 7D and 7E the arcuate piece 15E is not provided any arms like the arms 15C and 15D as shown in FIG. 1.
- the length of cover 4 for the cavity is marked by 4D and 4F in FIG. 10. All the other elements of FIG. 10 have been described before.
- FIG. 11 is modification of FIGS. 1 and 10 where mini levers 9 and 10 are not employed.
- arcuate piece 15 alone is sufficient to push and to open up the ring 7 to a larger diameter.
- An optional stabilizer pin or a bolt 7K may be incorporated in the design of ring 7 emerging at 7L from the ring, and 7K need not to come out of 6 as shown in the FIG, 11.
- the design of arcuate piece 15 may be modified to be a movable tapered wedge with an extra thickness between end portions 7D and 7E.
- the arcuate wedge piece 15 is driven by end 8B of bolt 8 by means of cavity 15F to push apart end 7D and 7E. Because of the location of 15 and cavity 15F as stabilizer the arms 15C and 15D can be eliminated. All other elements of this figure have been discussed before.
- arcuate mini levers 9 and 10 are shown without any arcuate piece 15 or 15E shown in FIGS. 1,10 and 11.
- bolt 8 alone is sufficient to drive the mini levers.
- Mini levers are partially located in the extended cavity 11A in cover 4.
- bolt 8 passing through cover 4 is used directly to drive mini levers 9 and 10 while the mini levers are kept in movable alignment by means of integral guiding arms they bear.
- Two guiding arms are depicted by two dotted circles 9H and 10H. Guiding arms 9H and 10H are fitted to slide up and down in the vertical grooves 6X and 6Y in the two opposite walls of cavity 11 and 11A.
- Mini levers 9 and 10 driven by bolt end 8B of bolt 8 have the same function as explained earlier to act on the resilient ring 7 which is not shown in FIG.12.
- the arcuate ridge is shown by P, PI, P2 , and P3.
- FIG. 13 depicts mini lever 9 seen in the vertical section 2-2 taken on FIG. 12.
- the top of toe 9C of mini lever 9 is depicted by a dotted line 9J.
- the guiding arm are shown by 9G and 9H which slide up and down in the vertical grooves provided for them in the two opposite walls of the cavity.
- One of the vertical groove 6X is depicted in FIG. 12.
- FIG. 14 shown next to FIG. 10 depicts mini lever 9 seen in FIG. 10 by taking a vertical section 2-2.
- the foot of 9 is shown by 9C.
- FIG. 15 shows mini levers 9 and 10 constructed from a single piece of resilient material by thinning out the material at the top which gives the mini levers the property of a spring.
- mini levers also can be constructed from a single stock of resilient material which integrally provides an arcuate section which can be acted up on by bolt 8 to impart force to the mini levers 9 and 10 to open apart ring 7.
- FIG. 16 shows compound coupling, which is the exact type of coupling shown in FIG. 5, the only difference is that coupling 55 connects pipe 2 and reducer 51 with transition in diameter from 52 to 53.
- Gasket 61 is provided series of vertical parallel arcuate slits 62.
- the enclosure for the gasket is provided by the beveled end 2D of pipe 2 and the vertical face 60 of reducer 51, and inner surface of coupling body shown by 55A and 55B.
- a gap between the pipe and the reducer is shown by 59.
- a groove at the end of reducer is shown by 54.
- the resilient ring 7 works the same as explained else where.
- the jaws 80, 84 member of a set of jaws are held to the coupling end 58 by grooves 55D and 51A; and the pins or bolts not shown. Pins and bolts passing through the jaw members are mounted into the grooves like the grooves shown by 55A and 55B and act as camming surfaces as explained in FIG. 5.
- the jaw members in FIG. 16 work exactly like the jaw members explained in FIG. 5.
- the ring could be of various configu- rations and constructions.
- the rings could be of composite construction such as an inner core wrapped with an outer helical spring winding.
- seals may be either on the pipes or in the coupling.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/829,209 US5794988A (en) | 1996-12-16 | 1997-03-31 | Grip coupling |
CA002306863A CA2306863A1 (en) | 1998-08-17 | 1998-08-17 | Grip coupling |
PCT/US1998/017035 WO2000009935A1 (en) | 1996-12-16 | 1998-08-17 | Grip coupling |
AU89108/98A AU8910898A (en) | 1996-12-16 | 1998-08-17 | Grip coupling |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US76634796A | 1996-12-16 | 1996-12-16 | |
PCT/US1998/017035 WO2000009935A1 (en) | 1996-12-16 | 1998-08-17 | Grip coupling |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000009935A1 true WO2000009935A1 (en) | 2000-02-24 |
Family
ID=26794307
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1998/017035 WO2000009935A1 (en) | 1996-12-16 | 1998-08-17 | Grip coupling |
Country Status (2)
Country | Link |
---|---|
AU (1) | AU8910898A (en) |
WO (1) | WO2000009935A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101501196B1 (en) | 2013-09-27 | 2015-03-11 | 노재남 | Wire clamp |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2877732A (en) * | 1953-09-25 | 1959-03-17 | Frederic N Eaton | Joint for connecting sections of torpedoes or other cylindrical vessels |
US2901269A (en) * | 1957-01-31 | 1959-08-25 | Mcdowell Mfg Co | Split ring coupling |
US3902743A (en) * | 1973-12-03 | 1975-09-02 | Fmc Corp | Full opening wellhead with retractile seat |
US5004274A (en) * | 1990-01-03 | 1991-04-02 | Price Brothers Company | Snap ring joint assembly |
-
1998
- 1998-08-17 AU AU89108/98A patent/AU8910898A/en not_active Abandoned
- 1998-08-17 WO PCT/US1998/017035 patent/WO2000009935A1/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2877732A (en) * | 1953-09-25 | 1959-03-17 | Frederic N Eaton | Joint for connecting sections of torpedoes or other cylindrical vessels |
US2901269A (en) * | 1957-01-31 | 1959-08-25 | Mcdowell Mfg Co | Split ring coupling |
US3902743A (en) * | 1973-12-03 | 1975-09-02 | Fmc Corp | Full opening wellhead with retractile seat |
US5004274A (en) * | 1990-01-03 | 1991-04-02 | Price Brothers Company | Snap ring joint assembly |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101501196B1 (en) | 2013-09-27 | 2015-03-11 | 노재남 | Wire clamp |
Also Published As
Publication number | Publication date |
---|---|
AU8910898A (en) | 2000-03-06 |
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