| Patent Number |
Title Of Patent |
Date Issued |
| D513072 |
Part in a ventilation system |
December 20, 2005 |
|
| D475781 |
Coupling ring for ventilation ducts |
June 10, 2003 |
|
| D461887 |
Coupling ring for ventilation ducts |
August 20, 2002 |
|
| D456072 |
Coupling ring for ventilation ducts |
April 23, 2002 |
|
| D456071 |
Coupling ring for ventilation ducts |
April 23, 2002 |
|
| D454949 |
Coupling ring for ventilation ducts |
March 26, 2002 |
|
| D453042 |
Coupling ring for ventilation ducts |
January 22, 2002 |
|
| D447223 |
Sealing rings for ventilation ducts |
August 28, 2001 |
|
| D386246 |
Circular sleeve coupling |
November 11, 1997 |
|
| D383196 |
Circular sleeve coupling |
September 2, 1997 |
|
| D383195 |
Circular sleeve coupling |
September 2, 1997 |
|
| D367316 |
Circular sleeve coupling |
February 20, 1996 |
|
| D363115 |
Component part of a T-piece |
October 10, 1995 |
|
| D362300 |
Circular sleeve coupling |
September 12, 1995 |
|
| D362299 |
Circular sleeve coupling |
September 12, 1995 |
|
| D361829 |
Circular sleeve coupling |
August 29, 1995 |
|
| D360021 |
Circular sleeve coupling |
July 4, 1995 |
|
| D360020 |
Circular sleeve coupling |
July 4, 1995 |
|
| D360019 |
Circular sleeve coupling |
July 4, 1995 |
|
| D360018 |
Circular sleeve coupling |
July 4, 1995 |
|
| 6758502 |
Coupling ring for ventilation ducts, and method of connecting ventilation ducts |
July 6, 2004 |
| A flanged coupling ring for a duct element has a mounting section configured to be mounted or a connection portion of the duct element, and flange means extending outwards from the mounting section. The flange means has, along its periphery, flanged coupling portions for connecting t |
| 6655182 |
Apparatus and method for reshaping tubes |
December 2, 2003 |
| In a method of reshaping a tube, an apparatus is used which has a roller nip for rotating the tube, and a shaping roller assembly for altering the cross-section of the tube, for instance from round to oval. |
| 6543575 |
Double-walled structure and connection arrangement |
April 8, 2003 |
| There is provided a double-walled structure for coupling to another double-walled structure. The coupling connects one female end portion of the one structure and one male end portion of the other structure together. The connecting requires only connecting of the outer walls of the s |
| 6466834 |
Method and apparatus for conversion of ventilation systems represented in computer-readable form |
October 15, 2002 |
| A method for converting a representation of a ventilation duct system in a computer readable form from a first duct type to a second duct type, such as circular and rectangular ducts. The method identifies straight duct elements in the system, calculates an equivalent size of one or seve |
| 6453710 |
Method and apparatus for manufacturing a helically-wound lock-seam tube having air nozzles |
September 24, 2002 |
| In a method of manufacturing a helically-wound lock-seam tube for a ventilation duct system, the tube is provided with a plurality of air nozzles through its wall. The method involves the steps of: feeding a strip of sheet metal from a supply to a punching and pressing unit; punching |
| 6431609 |
Pipe connection for ventilating duct system |
August 13, 2002 |
| A pipe connection for use in a ventilating duct system having ducts with circular cross-section is adapted to be inserted with a close fit into an outer pipe and be connected therewith. The pipe connection has a circumferential groove, in which a circumferential seal sealing against |
| 6295853 |
Spirally formed pipe cutter with driving mechanism to actively rotate inner knife |
October 2, 2001 |
| A method and apparatus for cutting spiral pipe is disclosed. The pipe cutting apparatus includes a driving mechanism that imparts rotation to a knife located inside the spiral pipe via a drive element, such as a drive shaft. The method includes forming a spiral pipe from a strip of mater |
| 6205740 |
Supporting element and method for manufacturing the same |
March 27, 2001 |
| An elongate supporting element has a cross section with a web (9) and two side flanges (10, 11) for the supporting of building panels or the like. The web (9) has an elongate, stress-equalising zone (4) which extends wholly or partly between the two outer ends (8a, 8b) of the supporting |
| 6192726 |
System and method for corrugating spiral formed pipe |
February 27, 2001 |
| A method and apparatus for forming corrugated pipe is disclosed. The pipe forming apparatus includes a selectively operable corrugation module having an inner corrugation roller movably mounted relative to an outer corrugation roller via a cylinder assembly. The method includes forming a |
| 6170883 |
Tubular element with sealing means and a method for manufacturing the tubular element |
January 9, 2001 |
| A tubular element has a sealing ring mounted at an end of the tubular element. The sealing ring has a base clamped against the outer surface of the tubular element. Further, the sealing ring has a sealing lip adapted to seal against an inner surface of an outer tube, in which the tubular |
| 6073977 |
Device for coupling pipe sections |
June 13, 2000 |
| A device for coupling two pipe sections comprises a clamping band of U-shaped cross-section with two inwardly directed flanges for encompassing end beads of the pipe sections which are to be coupled. The ends of the clamping band have cylindrical pockets each accommodating a cylindrical |
| 6062610 |
Device for the coupling together of pipes |
May 16, 2000 |
| A device for coupling together pipes, which at their end have an outwardly directed bead, comprises an annular clamping strap (1) and a clamping mechanism (4-6) arranged at the ends (2a, 2b) of the clamping strap. Between the ends (2a, 2b) of the clamping strap (1), a sealing element (7) |
| 6062270 |
Double-walled structure in a ventilation duct system |
May 16, 2000 |
| A double-walled structure in a ventilation duct system has an inner tube and an outer tube and, arranged therebetween, a sound-absorbing material. The inner tube is a helically-wound lock-seam tube formed from a sheet metal strip having parallel longitudinal areas of expanded metal. |
| 6030005 |
Method and device for coupling pipes |
February 29, 2000 |
| In a method of coupling a first pipe with a second pipe having a circumferential bead, use is made of an annular clamping band which is applied on the outside of the end beads and is tightened around the end beads when the pipes are placed end to end. The clamping band has on its ins |
| 5992275 |
Pipe cutter having non-rotating, overlapping knives |
November 30, 1999 |
| A pipe cutter having non-rotating, overlapping knives is provided. Also provided is a pipe cutter having non-rotatable overlapping knives wherein one of the knives is continuously reciprocated. |
| 5911457 |
Method for producing a double-walled structure |
June 15, 1999 |
| In a method of producing a double-walled structure, such as a silencer for use in a ventilation duct system, use is made of an arrangement having a forming head for forming helically-wound lock-seam tubing. In the forming head, a perforated metal strip is helically wound together with an |
| 5881442 |
Apparatus for making a double-walled structure |
March 16, 1999 |
| In an apparatus for producing a double-walled structure, such as a silencer for use in a ventilation duct system, use is made of an arrangement having a forming head for forming helically-wound lock-seam tubing. In the forming head, a perforated metal strip is helically wound together wi |
| 5860305 |
Pipe cutter with dual outer cutting knives and method |
January 19, 1999 |
| A pipe cutter having dual outer knives and a method of using the same is disclosed. The outer knives are mounted on knife positioners capable of swinging the outer knives into a pipe in an arc to overlap with a knife positioned inside the pipe. The method includes the step of simultaneou |
| 5801342 |
Double-walled structure and method and arrangement for producing the same |
September 1, 1998 |
| In a method of producing a double-walled structure, such as a silencer for use in a ventilation duct system, use is made of an arrangement having a forming head for forming helically-wound lock-seam tubing. In the forming head, a perforated metal strip is helically would together with an |
| 5636541 |
Apparatus for forming and cutting spiral pipe |
June 10, 1997 |
| An improved apparatus for forming and cutting spirally formed pipe, particularly spiral pipes having a diameter of approximately one inch or less, is disclosed. The device for slitting the spiral pipe into sections includes a first knife that is positioned inside the spiral pipe and a |
| 5618142 |
Self-drilling blind rivet and method for making a pressure tight riveted joint by means of the s |
April 8, 1997 |
| A self-drilling blind rivet includes a deformable sleeve and a shaft having a drill bit at one end. The shaft extends through the sleeve and the drill bit is connected to one end of the sleeve. The shaft and sleeve are rotatable as a unit. A method for making a riveted joint with a s |
| 5473815 |
Method for producing a connector for fluid pipe elements |
December 12, 1995 |
| A kit for producing a non-straight connector for fluid pipe elements comprises loose sleeve couplings and at least one flat blank which has been given such a shape and such dimensions that, after forming thereof and interconnecting its opposite ends, it is connectable with the sleeve |
