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Class Information
Number: 137/269.5
Name: Fluid handling > Convertible > Reversible check
Description: Devices comprising check valves mounted in alternately positionable carriers whereby a carried valve may check fluid flow in either of two directions by repositioning the carrier.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7028709 |
One-way valve with poppet member |
Apr. 18, 2006 |
| 6789567 |
Bi-directional constant flow device |
Sep. 14, 2004 |
| 6668858 |
Check valve |
Dec. 30, 2003 |
| 6341618 |
Plumbing stop valve and method of use |
Jan. 29, 2002 |
| 6247489 |
Check valve |
Jun. 19, 2001 |
| 6227231 |
Pressure/flow rate control valve |
May. 8, 2001 |
| 5921271 |
Safety shut-off valve for high pressure bottles |
Jul. 13, 1999 |
| 5918623 |
Starting valve |
Jul. 6, 1999 |
| 5671769 |
Swing check valve and method for repairing same |
Sep. 30, 1997 |
| 5507630 |
Quick release interchangeable valve arrangement for slurry pump systems |
Apr. 16, 1996 |
| 5004005 |
Combination valve |
Apr. 2, 1991 |
| 4989631 |
Valve device with control sleeve and check valve |
Feb. 5, 1991 |
| 4969484 |
Reversible flow check valve |
Nov. 13, 1990 |
| 4928725 |
Combination plug and two-way check valve |
May. 29, 1990 |
| 4846218 |
Check valve for liquid chromatography pumps |
Jul. 11, 1989 |
| 4770413 |
Breathing exercise device |
Sep. 13, 1988 |
| 4759198 |
Ventilator for refrigerator |
Jul. 26, 1988 |
| 4708084 |
System for distributing water flow between a reservoir and a water source |
Nov. 24, 1987 |
| 4601467 |
Valve module and apparatus therefor |
Jul. 22, 1986 |
| 4589441 |
System for controlling liquid flow |
May. 20, 1986 |
| 4537213 |
Double flapper check valve |
Aug. 27, 1985 |
| 4535876 |
Shock absorber construction |
Aug. 20, 1985 |
| 4417861 |
Cell culture pumping system |
Nov. 29, 1983 |
| 4296772 |
Non-return valve |
Oct. 27, 1981 |
| 4257443 |
Check valve |
Mar. 24, 1981 |
| 4183373 |
Fluid pressure-operated systems |
Jan. 15, 1980 |
| 4169578 |
Rotary valve with spring biased valve member |
Oct. 2, 1979 |
| 4082108 |
Valve block |
Apr. 4, 1978 |
| 4072291 |
Rotary valve with spring biased valve member |
Feb. 7, 1978 |
| 4062378 |
Easily disassembled, one-way check valve |
Dec. 13, 1977 |
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