| Class Number |
Class Name |
Patents |
| 137/1 |
Processes |
790 |
| 137/123 |
Siphons |
15 |
| 137/15.1 |
Highspeed fluid intake means (e.g., jet engine intake) |
124 |
| 137/154 |
Diverse fluid containing pressure systems |
31 |
| 137/215 |
Back flow prevention by vacuum breaking (e.g., anti-siphon devices) |
15 |
| 137/219 |
Larner-johnson type valves; i.e., telescoping internal valve in expanded flow line section |
87 |
| 137/223 |
Inflatable article (e.g., tire filling chuck and/or stem) |
255 |
| 137/234.6 |
With vehicle guide or support, e.g., service station |
65 |
| 137/236.1 |
Distribution systems involving geographic features |
225 |
| 137/237 |
With cleaner, lubrication added to fluid or liquid sealing at valve interface |
19 |
| 137/247 |
With liquid valves or liquid trap seals |
12 |
| 137/255 |
Plural tanks or compartments with parallel flow |
95 |
| 137/268 |
With holder for solid, flaky or pulverized material to be dissolved or entrained |
372 |
| 137/269 |
Convertible |
308 |
| 137/272 |
Hydrant type |
38 |
| 137/309 |
Reversing valves - regenerative furnace type |
22 |
| 137/312 |
With leakage or drip collecting |
695 |
| 137/315.01 |
With repair, tapping, assembly, or disassembly means |
167 |
| 137/330 |
Non-valving motion of the valve or valve seat |
20 |
| 137/334 |
With heating or cooling of the system |
146 |
| 137/342 |
With fluid system support for workman or non-system material |
11 |
| 137/343 |
With casing, support, protector or static constructional installations |
123 |
| 137/38 |
Control by change of position or inertia of system |
221 |
| 137/383 |
With lock or seal |
70 |
| 137/386 |
Liquid level responsive or maintaining systems |
113 |
| 137/454.2 |
Removable valve head and seat unit |
254 |
| 137/455 |
Line condition change responsive valves |
21 |
| 137/47 |
Speed responsive valve control |
17 |
| 137/544 |
With means for separating solid material from the fluid |
118 |
| 137/551 |
With indicator, register, recorder, alarm or inspection means |
212 |
| 137/560 |
Combined |
94 |
| 137/561R |
Systems |
87 |
| 137/59 |
Freeze condition responsive safety systems |
78 |
| 137/65 |
Combustion failure responsive fuel safety cut-off for burners |
23 |
| 137/67 |
Destructible or deformable element controlled |
94 |
| 137/78.1 |
Ambient condition change responsive |
31 |
| 137/797 |
Frangible |
87 |
| 137/798 |
With coupling |
67 |
| 137/800 |
With closure |
54 |
| 137/801 |
Faucets and spouts |
398 |
| 137/802 |
Miscellaneous |
15 |
| 137/803 |
Flow affected by fluid contact, energy field or coanda effect (e.g., pure fluid device or system) |
30 |
| 137/82 |
Pressure modulating relays or followers |
154 |
| 137/87.01 |
Self-proportioning or correlating systems |
27 |
| 137/900 |
Bumpless manual to automatic relays |
1 |
| 137/901 |
Biased ball valves with operators |
116 |
| 137/902 |
Slush pump check valves |
24 |
| 137/903 |
Rubber valve springs |
57 |
| 137/904 |
Cushion check valves |
22 |
| 137/905 |
Rotary valves for multiple gas burners |
2 |
| 137/906 |
Valves biased by fluid "springs" |
71 |
| 137/907 |
Vacuum-actuated valves |
270 |
| 137/908 |
Respirator control |
94 |
| 137/909 |
Magnetic fluid valve |
36 |
| 137/910 |
Destructible or deformable element constructed of specific material |
58 |
