| Class Number |
Class Name |
No. of Patents |
| 55/DIG.25 |
Agglomerators |
92 |
| 55/DIG.29 |
Air curtains |
104 |
| 55/306 |
Aircraft anti-ingestion means (e.g., aircraft debris guard) |
81 |
| 55/DIG.26 |
Bag coupling |
27 |
| 55/DIG.7 |
Black liquor treatment |
0 |
| 55/DIG.8 |
Built-in vacuum cleaners |
11 |
| 55/DIG.28 |
Carburetor attached |
169 |
| 55/DIG.27 |
Cleaners, liquid |
2 |
| 55/DIG.15 |
Cold traps |
34 |
| 55/385.1 |
Combined or convertible |
586 |
| 55/385.2 |
In environmental air enclosure |
514 |
| 55/385.3 |
In motor vehicle |
859 |
| 55/385.4 |
In vented container |
180 |
| 55/385.8 |
Involving ash tray |
27 |
| 55/385.6 |
Involving communication receiving or transmitting apparatus |
141 |
| 55/385.5 |
Involving mining or metallurgical apparatus |
60 |
| 55/385.7 |
Involving shielding apparatus |
21 |
| 55/DIG.17 |
Compressed air water removal |
181 |
| 55/DIG.19 |
Crankcase ventilation |
60 |
| 55/434 |
Deflector |
62 |
| 55/441 |
Concentric, nested conduits with closed and open ends for flow reversal |
36 |
| 55/447 |
Fixed gas whirler or rotator means |
80 |
| 55/461 |
Continuous confined flow path |
85 |
| 55/456 |
Helical vane or baffle within flow conduit |
89 |
| 55/457 |
Between gas flow path wall and central core |
189 |
| 55/458 |
Inflow pipe projects within casing |
30 |
| 55/455 |
Plural nonradial gas passages in peripheral wall (e.g., tuyere) |
34 |
| 55/459.1 |
Tangential gas inlet opening in casing |
712 |
| 55/459.2 |
Inclined inflow |
39 |
| 55/459.4 |
Inflow nozzle or vane |
45 |
| 55/459.3 |
Scroll |
51 |
| 55/459.5 |
Varying inlet area |
42 |
| 55/460 |
With tangential gas outlet |
48 |
| 55/453 |
With concentrate outlet means in one of parallel plates mounting spaced whirler vanes |
2 |
| 55/448 |
With outlet gas conduit wall common to surrounding gas inlet or concentrate outlet or collector |
16 |
| 55/449 |
Gas inlet and outlet have common wall |
42 |
| 55/450 |
With outlet from collector |
24 |
| 55/451 |
Tangential outlet pipe |
9 |
| 55/452 |
With plural concentrate outlets in arcuate, axially extending whirl chamber wall |
48 |
| 55/454 |
With tangential concentrate outlet pipe |
22 |
| 55/434.1 |
Having insulation |
16 |
| 55/462 |
Impingement baffle |
143 |
| 55/463 |
Conical with apex facing upstream |
74 |
| 55/464 |
Corrugated, ribbed, crimped, or with projections |
52 |
| 55/465 |
Planar |
129 |
| 55/440 |
Parallel and continuous nonplanar members (e.g., crimped, corrugated, curved) |
168 |
| 55/442 |
Plural deflectors overlapped and spaced serially in gas flow |
66 |
| 55/445 |
Deflectors apertured or closely spaced from flow path wall |
28 |
| 55/446 |
Space or aperture opposed by solid deflector surface |
97 |
| 55/443 |
Plural deflectors in row across gas flow |
73 |
| 55/444 |
Deflectors in alternate rows aligned (i.e., staggered) |
110 |
| 55/436 |
Removably supported deflector surface |
38 |
| 55/435 |
Wear liners or surface characteristics (e.g., anti-erosion) |
77 |
| 55/437 |
With gas pump or fan |
52 |
| 55/439 |
Downstream of separator |
61 |
| 55/438 |
Within separator |
45 |
| 55/434.2 |
With heating or cooling means |
39 |
| 55/434.3 |
Two confined fluids in indirect contact |
8 |
| 55/434.4 |
Heat exchanger is part of separator or is contiguous therewith |
60 |
| 55/DIG.39 |
Electrets separator |
167 |
| 55/DIG.30 |
Exhaust treatment |
943 |
| 55/DIG.31 |
Filter frame |
295 |
| 55/307 |
Filter or apertured deflector unit discontinuous across gas flow within flow conduit |
29 |
| 55/308 |
Multiple members serially spaced in flow conduit |
26 |
| 55/361 |
Flexible or collapsible bag type |
43 |
| 55/365 |
Bag carried strain relief means between bag supports |
4 |
| 55/369 |
Closure means other than coupler to flow line for filter or cover bag |
37 |
| 55/370 |
Use position residue removal means |
5 |
| 55/371 |
Inner filter bag removal |
9 |
| 55/373 |
Housing closure secures bag |
51 |
| 55/364 |
Impervious bag with pervious portion |
17 |
| 55/380 |
Nested bags or folded wall with spaced or unsecured faces |
63 |
| 55/381 |
Seaming, reinforcing or bag structure |
130 |
| 55/382 |
Multi-ply, strata, or laminated |
79 |
| 55/368 |
Spaced interior inflow path or with means modifying gas flow in bag |
25 |
| 55/363 |
Toroidal or annular bag |
12 |
| 55/367 |
Valved, self-closing, or apparatus contained bag closing means |
52 |
| 55/372 |
With additional nonbag type filter |
33 |
| 55/362 |
With bag ejecting means |
4 |
| 55/374 |
With flow line coupling means |
82 |
| 55/376 |
Coupling part inseparable from bag |
42 |
| 55/377 |
Resilient or expansible |
59 |
| 55/375 |
Flexible conduit joins line to bag |
20 |
| 55/378 |
With securing or supporting means |
249 |
| 55/379 |
Bag internally supported |
174 |
| 55/366 |
With separable nonfiltering residue container |
26 |
| 55/DIG.42 |
Foam filter materials |
49 |
| 55/DIG.33 |
Gas mask canister |
67 |
| 55/DIG.32 |
Gaseous fluid conveying |
10 |
| 55/DIG.1 |
Graduated electrostatic field |
4 |
| 55/DIG.34 |
Indicator and controllers |
125 |
| 55/DIG.14 |
Inertia separator |
55 |
| 55/DIG.36 |
Kitchen hoods |
261 |
| 55/DIG.43 |
Knitted filter mediums |
30 |
| 55/DIG.37 |
Louvers |
28 |
| 55/DIG.6 |
Magnetic couplings |
10 |
| 55/423 |
Means within gas stream for conducting concentrate to collector |
110 |
| 55/DIG.5 |
Methods of making filter |
565 |
| 55/529 |
Miscellaneous (e.g., shapes) |
157 |
| 55/400 |
Mounted or supported for continuous motion |
104 |
| 55/406 |
Differentially deflected system fluid constituents |
140 |
| 55/407 |
Concentrate flow groove, guide, or channel on moving member |
44 |
| 55/408 |
Separated gas conducted axially through rotating member |
53 |
| 55/409 |
Hollow shaft |
53 |
| 55/404 |
Moved by system fluid in confined flow path |
44 |
| 55/405 |
Fluid flow normal to axis of moving member |
21 |
| 55/401 |
Plural distinct separating media or stages |
53 |
| 55/402 |
Overlapping moving separators |
3 |
| 55/403 |
Plural moving separators serially arranged |
35 |
| 55/341.1 |
Multiple bag type filters in chamber |
234 |
| 55/341.2 |
Gas flow from inside to outside of filter |
61 |
| 55/341.4 |
Horizontally mounted filters |
8 |
| 55/341.3 |
Modular compartments |
14 |
| 55/341.7 |
Horizontally mounted filters |
18 |
| 55/341.5 |
Modular compartments |
14 |
| 55/341.6 |
Partitioned bag filter chamber |
17 |
| 55/341.11 |
With heating or cooling means or having insulation |
12 |
| 55/342 |
Multiple separators, each with discrete and longitudinally confined gas inlet or outlet flow path |
65 |
| 55/345 |
Centrifugal |
189 |
| 55/346 |
Parallel |
82 |
| 55/347 |
Gas inlet and outlet at linearly opposite ends of separating zone |
59 |
| 55/348 |
Plural gas inflow openings, slots, or whirl vanes in each separator |
72 |
| 55/349 |
Tangential inlet to each separator |
141 |
| 55/343 |
Combined serial and parallel arrangement |
133 |
| 55/350.1 |
Filters |
140 |
| 55/344 |
With flow equalizing, controlling, or distributing means |
72 |
| 55/342.1 |
With heating or cooling means or having insulation |
12 |
| 55/342.2 |
Heat exchanger is part of separator or is contiguous therewith |
14 |
| 55/DIG.44 |
Pile and pile-type filter mediums |
17 |
| 55/315 |
Plural serial basically diverse separating media |
133 |
| 55/317 |
At least one mounted for continuous motion |
43 |
| 55/318 |
Plural stages in unitary casing |
161 |
| 55/320 |
Deflector and fibrous, filamentary, particulate solids, or cohesive sheet filter type |
152 |
| 55/332 |
Cohesive sheet-like filter |
50 |
| 55/334 |
Bag type |
44 |
| 55/335 |
Including imperforate upstream bag end deflector |
14 |
| 55/336 |
Conical |
21 |
| 55/337 |
Cyclone or centrifugal whirl type deflector |
570 |
| 55/333 |
Multiple contiguous layers or coils with radial gas flow |
17 |
| 55/331 |
Conical deflector with curved or parabolic radially extending wide downstream end |
25 |
| 55/329 |
Filamentary brush type or fibrous mass |
25 |
| 55/330 |
Tubular or annular for radial gas flow |
48 |
| 55/327 |
Filter is most upstream |
49 |
| 55/328 |
Movable or movable mounted for adjustment or nonuse |
16 |
| 55/321 |
Multiple of one type in series of parallel in flow path |
65 |
| 55/323 |
Filters |
130 |
| 55/324 |
In parallel |
71 |
| 55/325 |
Serially spaced deflectors |
54 |
| 55/326 |
With connected trough or channel |
18 |
| 55/322 |
Serially spaced with at least one of other type intermediately positioned |
40 |
| 55/319 |
Including expansion chamber |
180 |
| 55/315.1 |
With heating or cooling means or having insulation |
30 |
| 55/315.2 |
Heat exchanger is part of separator or is contiguous therewith |
37 |
| 55/DIG.12 |
Pocket type filter |
39 |
| 55/DIG.13 |
Polyurethane filters |
29 |
| 55/DIG.9 |
Radioactive filters |
69 |
| 55/428 |
Residue access, handling or removing means |
110 |
| 55/429 |
Separable collection container |
391 |
| 55/428.1 |
With heating or cooling means |
15 |
| 55/430 |
With means effecting or assisting discharge of residue (e.g., endless belt) |
80 |
| 55/431 |
Gaseous or liquid |
149 |
| 55/432 |
With movable or manipulable means controlling escape of residue |
138 |
| 55/433 |
Manually actuated |
66 |
| 55/DIG.10 |
Residue burned |
248 |
| 55/DIG.35 |
Respirators and register filters |
156 |
| 55/391 |
Restricted annular mixture inlet to collector zone around gas outlet conduit attached baffle |
25 |
| 55/422 |
Separating media adjustable to various positions of use or to nonuse |
102 |
| 55/DIG.21 |
Silencer cleaner |
21 |
| 55/DIG.20 |
Spark arrester |
24 |
| 55/522 |
Specific media material |
174 |
| 55/523 |
Ceramic or sintered |
902 |
| 55/527 |
Fibrous or strand form |
410 |
| 55/528 |
Organic (e.g., vegetable) |
511 |
| 55/525 |
Metal mesh or expanded material |
194 |
| 55/526 |
Wadded or compressed |
44 |
| 55/524 |
With coating, impregnant, or bonding agent |
867 |
| 55/520 |
Spiral filter media |
128 |
| 55/DIG.46 |
Spray booths |
204 |
| 55/DIG.23 |
Steam separators |
19 |
| 55/477 |
Strands or bristles with unsupported or free extremities (e.g., brush type) |
33 |
| 55/DIG.38 |
Tubular collector electrode |
75 |
| 55/482 |
Two or more separators (e.g., spaced filters in flow line or casing) |
419 |
| 55/486 |
Plies or layers of different characteristics or orientation |
553 |
| 55/487 |
Differing mesh sizes |
389 |
| 55/489 |
Orientation of elements |
75 |
| 55/488 |
Variation in shape or size |
72 |
| 55/484 |
Spaced for parallel flow of gas |
471 |
| 55/485 |
Three or more serially spaced |
240 |
| 55/483 |
With framework for edge to edge relation |
142 |
| 55/482.1 |
With heating or cooling means |
18 |
| 55/DIG.2 |
Vacuum cleaner bags |
141 |
| 55/DIG.3 |
Vacuum cleaner |
554 |
| 55/DIG.24 |
Viscous coated filter |
17 |
| 55/424 |
With concentrate backflow or re-entrainment preventing means |
84 |
| 55/426 |
Baffle intermediate concentrate collector zone and gas outlet conduit |
134 |
| 55/427 |
Adjustably mounted |
13 |
| 55/425 |
Closure between separating and collecting zones |
10 |
| 55/360 |
With electrical grounding means |
34 |
| 55/467 |
With gas flow effecting means |
409 |
| 55/473 |
Impeller upstream of separating media |
328 |
| 55/471 |
Impeller within or proximate to space encompassed by separating media |
262 |
| 55/468 |
Injector or jet pump type |
42 |
| 55/469 |
Manual, weight, or traction operated gas pump |
7 |
| 55/470 |
Plurality of impellers arranged in parallel or performing diverse functions |
43 |
| 55/472 |
Upright or multichambered casing |
304 |
| 55/467.1 |
With heating or cooling means |
50 |
| 55/358 |
With ground support means (nonflow conducting) |
24 |
| 55/392 |
With guide means effecting removal of constituent layer out of gas stream |
52 |
| 55/394 |
At escape means for heavier constituent |
76 |
| 55/395 |
And separable residue receptacle |
19 |
| 55/396 |
Annular outlet around gas outflow path |
119 |
| 55/398 |
Plural, angularly spaced |
45 |
| 55/397 |
Spaced, overlapped walls |
27 |
| 55/393 |
Movably mounted for adjustment |
12 |
| 55/399 |
Spiral guide |
59 |
| 55/392.1 |
With heating or cooling means |
4 |
| 55/418 |
With inflow gas control or distribution |
261 |
| 55/420 |
Check valve |
60 |
| 55/419 |
Multiple inlets |
171 |
| 55/418.1 |
With heating or cooling means or having insulation |
9 |
| 55/355 |
With liquid trap seal or valve |
72 |
| 55/475 |
With means adjustable to control compactness of separating media |
43 |
| 55/356 |
With means facilitating transportability or handling of apparatus |
259 |
| 55/357 |
Handle feature for apparatus or part thereof |
123 |
| 55/351 |
With means for advancing clean portions of continuous or indefinite length separating media into gas stream |
52 |
| 55/352 |
Advancing means initiated by flow, pressure, or pressure differential of gas |
26 |
| 55/354 |
Indefinite or running length |
56 |
| 55/353 |
Multiple distinct units |
18 |
| 55/421 |
With means for liquid separation |
61 |
| 55/476 |
With means introducing gas into midst of separating media |
41 |
| 55/490 |
With means securing or retaining separating media |
132 |
| 55/512 |
Discrete fibrous or particulate solids |
90 |
| 55/515 |
Foraminous container |
63 |
| 55/514 |
Fused or bonded to a supporting or backing member |
95 |
| 55/516 |
Held between openwork |
45 |
| 55/518 |
Between perforated plates |
99 |
| 55/519 |
Between reticulated end closures |
26 |
| 55/517 |
Between telescoped or nonplanar retainers |
36 |
| 55/513 |
Resilient securing means |
35 |
| 55/491 |
Fastening means pierces or penetrates media |
84 |
| 55/494 |
Grid or tray type for bottom support only |
46 |
| 55/493 |
Hinged or pivoted retainer or clamp on backing frame or in flow line |
259 |
| 55/492 |
Internal frame or support means |
162 |
| 55/495 |
Unit or cohesive sheet-like media in flow line or frame |
212 |
| 55/504 |
Aligned stop, media and removable retainer |
159 |
| 55/510 |
Annular unit held between dished or plate-like end members for top and bottom support |
282 |
| 55/509 |
Distorted media in flow line or resilient retaining means |
157 |
| 55/511 |
Edge supported or secured only |
296 |
| 55/497 |
Edge supporting or securing means for nonplanar sheet form filter (e.g., zigzag) |
353 |
| 55/498 |
Spiral or cylindrical |
699 |
| 55/499 |
With additional transversely arranged members |
138 |
| 55/500 |
Flexible sheet type maintained in nonplanar configuration |
293 |
| 55/505 |
Flow line end coupling (e.g., pipe end) |
164 |
| 55/506 |
Flange or track on flow line for slidably retaining media |
117 |
| 55/507 |
Resilient attaching means |
136 |
| 55/502 |
Gasket or sealing means |
928 |
| 55/503 |
Media within joinable or separable flow line sections |
301 |
| 55/508 |
Suspended or supported by bracket or from top of frame |
168 |
| 55/501 |
With additional support means not positively engaged or joined to media (e.g., across face of filter) |
250 |
| 55/496 |
With adjustable connector or size adjusting means |
111 |
| 55/490.1 |
With heating or cooling means |
22 |
| 55/490.2 |
Two confined fluids in indirect contact |
18 |
| 55/282 |
With nonliquid cleaning means for separating media |
96 |
| 55/301 |
Cohesive filter media cleaning |
68 |
| 55/304 |
Filter manipulation, shaking or flexing for precluding or removing encrustation |
115 |
| 55/305 |
Attendant actuated manipulating means |
27 |
| 55/302 |
Pneumatic reverse flushing |
579 |
| 55/303 |
Draft diverted from one side of filter to other |
51 |
| 55/290 |
For moving indefinite or continuous length separating media |
108 |
| 55/282.1 |
Having insulation |
2 |
| 55/288 |
Interdependent or interoperated gas flow cutoff or apparatus shutdown and media cleaning |
53 |
| 55/289 |
Interdigitated comb and separating media |
22 |
| 55/291 |
Plural diverse cleaning means |
44 |
| 55/294 |
Relatively movable pneumatic nozzle (e.g., scanning nozzle) |
147 |
| 55/295 |
Solid agent cleaning member movingly contacts apparatus |
41 |
| 55/296 |
Agent has defined traversing motion relative to separating media |
49 |
| 55/297 |
With motion effecting means interrelated with separating operation |
15 |
| 55/298 |
Gas flow actuates member |
9 |
| 55/299 |
With resulting flexing or distortion of resilient or collapsible separating media |
24 |
| 55/300 |
Vibrating, jarring, or rapping means |
94 |
| 55/292 |
Sonic type |
23 |
| 55/283 |
With automatic control of cleaning means |
251 |
| 55/282.2 |
With heating or cooling means |
94 |
| 55/282.3 |
Residue burned |
190 |
| 55/282.4 |
Two confined fluids in indirect contact |
6 |
| 55/282.5 |
Heat exchanger is part of separator or is contiguous therewith |
16 |
| 55/293 |
With separating media pneumatically vibrated or flexed |
49 |
| 55/284 |
With sequential cleaning of plural units |
76 |
| 55/285 |
Ferris wheel type filter unit arrangement |
9 |
| 55/286 |
With gas flow arresting means |
10 |
| 55/287 |
Interconnected with cleaning means |
70 |
| 55/474 |
With particulate solids movement during use or agitating means therefor |
95 |
| 55/359 |
With portion of cover removable |
35 |
| 55/338 |
With recycle means |
95 |
| 55/339 |
For concentrate entrained in effluent gas outlet means |
17 |
| 55/340 |
Return conduit is external of apparatus |
49 |
| 55/338.1 |
With heating or cooling means |
9 |
| 55/383 |
With remote fan or pump and unconfined flow to separator |
15 |
| 55/478 |
With separate flow line access means or filter media passage means offset to flow path |
54 |
| 55/480 |
Access means is clamping or coupling means for unit filter media |
107 |
| 55/479 |
For discrete filter particles |
104 |
| 55/481 |
Unit transversely slidable through flow path |
218 |
| 55/410 |
With separated gas outflow control (e.g., apertured conduit) |
56 |
| 55/413 |
Baffle or flow guide |
79 |
| 55/414 |
Within or downstream of gas outlet conduit |
62 |
| 55/416 |
Flow straightener |
47 |
| 55/415 |
Movable baffle of flow guide |
17 |
| 55/411 |
Movable gas outlet conduit |
7 |
| 55/412 |
Longitudinal |
17 |
| 55/417 |
Valve |
148 |
| 55/410.1 |
With heating or cooling means |
8 |
| 55/466 |
With separated nongaseous material conducting or treating means |
314 |
| 55/309 |
With separating media bypass or system gas pressure relief (e.g., rupturable or deformable) |
93 |
| 55/310 |
Pressure relief means to or from atmosphere |
64 |
| 55/311 |
Relief means is downstream of media (e.g., ambient air bypasses filter) |
25 |
| 55/312 |
Valved bypass means |
77 |
| 55/313 |
Gas force responsive |
36 |
| 55/314 |
Shunt means for total flow |
59 |
| 55/309.1 |
With heating or cooling means |
8 |
| 55/DIG.18 |
Work bench |
134 |
| 55/DIG.45 |
Woven filter mediums |
35 |
| 55/521 |
Zigzag, corrugated, or conical |
722 |
