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Class Information
Number: 285/424
Name: Pipe joints or couplings > Materials > Sheet
Description: Subject matter which includes material originally in sheet form.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4840201 |
Two piece pipe fitting cover |
Jun. 20, 1989 |
| 4836585 |
Shaped flange for connecting air duct segments |
Jun. 6, 1989 |
| 4822083 |
Butt joint between two thin-walled round sheet metal pipe sections |
Apr. 18, 1989 |
| 4820569 |
Low loss flexible connector for air ducts |
Apr. 11, 1989 |
| 4813720 |
Band clamp with improved clamping arrangement |
Mar. 21, 1989 |
| 4781401 |
Adjustable jack for mounting on a duct bend |
Nov. 1, 1988 |
| 4765375 |
Duct |
Aug. 23, 1988 |
| 4753462 |
Adjustable tube clamping connector |
Jun. 28, 1988 |
| 4728127 |
Pipe joint |
Mar. 1, 1988 |
| 4725083 |
Flanged joint for two sheet material air channel sections of rectangular cross section |
Feb. 16, 1988 |
| 4720359 |
Wrapped fan cylinder for water cooling tower |
Jan. 19, 1988 |
| 4704828 |
Snap together window well |
Nov. 10, 1987 |
| 4691945 |
Conduit couplings |
Sep. 8, 1987 |
| 4679832 |
Flange ring for pipes |
Jul. 14, 1987 |
| 4669762 |
Dual duct connector |
Jun. 2, 1987 |
| 4662661 |
Flange type duct joint assembly and seal arrangement therefor |
May. 5, 1987 |
| 4636105 |
Corner piece for frames |
Jan. 13, 1987 |
| 4629226 |
Pipe lap joint with collapsible sealing zone and band clamp |
Dec. 16, 1986 |
| 4628799 |
Duct attachment and extension for an air conditioning unit |
Dec. 16, 1986 |
| 4620729 |
Round pipe starter fitting |
Nov. 4, 1986 |
| 4609213 |
Preformed band for use in coupling tubular members |
Sep. 2, 1986 |
| 4597596 |
Cylinder end seal |
Jul. 1, 1986 |
| 4579375 |
Sheet metal duct system having integral transverse flanges |
Apr. 1, 1986 |
| 4572553 |
Flange connector |
Feb. 25, 1986 |
| 4569110 |
Self tapping duct fitting and method of use |
Feb. 11, 1986 |
| 4566724 |
Duct joint frame |
Jan. 28, 1986 |
| 4564227 |
Flanged duct joint utilizing snap-in corner pieces |
Jan. 14, 1986 |
| 4558892 |
Duct assembly system |
Dec. 17, 1985 |
| 4555130 |
Diver's umbilical quick-disconnect device |
Nov. 26, 1985 |
| 4552388 |
Corner angle assembly |
Nov. 12, 1985 |
| 4542923 |
Duct jointing system |
Sep. 24, 1985 |
| 4537430 |
Duct joining system |
Aug. 27, 1985 |
| 4526091 |
Adjustable roof jack |
Jul. 2, 1985 |
| 4523780 |
Tube joint |
Jun. 18, 1985 |
| 4516797 |
Flanged ring for tubes |
May. 14, 1985 |
| 4509778 |
Duct joint assembly |
Apr. 9, 1985 |
| 4508376 |
Flange type duct joint assembly and seal arrangement therefor |
Apr. 2, 1985 |
| 4502189 |
Coupling with outrigger parts |
Mar. 5, 1985 |
| 4491124 |
Self-tapping duct fitting |
Jan. 1, 1985 |
| 4480859 |
Flexible connector for flat wall ducting |
Nov. 6, 1984 |
| 4479288 |
Clamp for tubing |
Oct. 30, 1984 |
| 4466641 |
Duct connecting system |
Aug. 21, 1984 |
| 4466642 |
Prefabrication method and preformed band for use in coupling tubular members |
Aug. 21, 1984 |
| 4465308 |
Connection flange for tubular members |
Aug. 14, 1984 |
| 4462618 |
Prefabricated double-walled metal chimney |
Jul. 31, 1984 |
| 4461499 |
Transverse joint system for sheet metal ducts |
Jul. 24, 1984 |
| 4447078 |
Method for retaining air pressure in a duct system |
May. 8, 1984 |
| 4447079 |
Duct jointing system |
May. 8, 1984 |
| 4437687 |
Waterproof assembly or sealing an aperture housing a conduit |
Mar. 20, 1984 |
| 4418943 |
Duct fitting |
Dec. 6, 1983 |
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