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Class Information
Number: 454
Name: Ventilation >
Description: This is the parent class for apparatus and processes for supplying air to and removing it from enclosures, for distributing and circulating the air therein, or for preventing its contamination.










Class Number Class Name No. of Patents
454/902

Air raid shelter ventilation

19
454/905

Black out means

7
454/194

Blast or shock wave prevention

17
454/1

Chimney or stack

38
454/3

Chimneytop or stacktop structure (e.g., cowl)

33
454/4

Cap closure

35
454/5

Pivoted

21
454/7

Having remote control

14
454/6

Plural, separately pivoted portions

1
454/34

Four-side outlets with shield

4
454/39

Having air current inducing jet

17
454/40

Plural, in-series jets

5
454/20

Having air current responsive adjustment means

6
454/26

Current regulator

4
454/21

Wind vane

6
454/25

Hood having outlet opening perpendicular to wind

3
454/24

Shield

1
454/22

With air current inducing jet

4
454/23

Centered within induced air current

0
454/27

Having readily movable air current regulating means

5
454/29

Continuously horizontal panel

7
454/30

Pivoted

8
454/31

Plural

4
454/28

With temperature sensitive release

4
454/8

Inlet and outlet

29
454/9

Having air current responsive adjustment means (e.g., wind vane, etc.)

4
454/10

Inlet

3
454/11

Having air current responsive adjustment means (e.g., wind vane, etc.)

4
454/35

Spaced cap

27
454/38

And skirt deflector extending outwardly from chimney or stack

12
454/36

And spaced shield

9
454/37

And skirt deflector extending outwardly from chimney or stack

4
454/33

Spiral or plural stacked rings

8
454/32

T-top

3
454/12

With means for mounting on brick-type chimney

21
454/13

Chimneytop structure extends within chimney

8
454/14

Means for mounting to inner wall

13
454/15

With rotary means in air current (e.g., fan, etc.)

14
454/18

Cage-type blade set

21
454/19

Including additional blade set

6
454/16

Driven by external power source

25
454/17

Having air current responsive adjustment means (e.g., wind vane, etc.)

9
454/43

Having flue heater

21
454/42

Having internal air current guide

12
454/44

Having lining or sleeve

27
454/47

Axially connected chimney or stack sections

16
454/45

Including breech opening

12
454/46

Pressurized air lining

8
454/41

Having liquid drain

11
454/2

Vehicle

14
454/187

Clean room

487
454/184

Electronic cabinet

1389
454/68

Elevator

16
454/48

Exterior vault or manhole cover

14
454/369

Fire damper

108
454/903

Flexible ducts used for carrying air

63
454/901

Fog dispeller

2
454/237

Having both inlet and outlet airways

68
454/239

Including automatic control means

107
454/241

Including unitary inlet and outlet housing

20
454/245

Air distributor with return vent (e.g., register, etc.)

23
454/246

Baseboard type

5
454/248

Ceiling type

20
454/247

Floor type

6
454/242

Rooftop

12
454/243

Sleeved vent for ceiling, wall, or floor (e.g., thimble)

9
454/244

With air pump means for both inlet and outlet airways

10
454/249

With air pump

17
454/250

Natural ventilation including air passage through rooftop (i.e., no air pump)

53
454/238

Pressure regulation

95
454/251

With air pump means

90
454/252

For both inlet and outlet airways

72
454/253

For outlet airway

42
454/240

With wind-operated air pump

3
454/228

Having forced recirculation

68
454/236

For use with heating and cooling means

140
454/230

Forced recirculation alone

85
454/233

For use with heating or cooling means

111
454/232

Having plural or branched recirculation ducts

25
454/231

Having recirculating duct connecting upper and lower room air strata

35
454/229

Including automatic control means

114
454/234

Including unitary housing having both inlet and outlet airways

40
454/235

Having air pump means for both airways

17
454/254

Having inlet airway

46
454/256

Including automatic control means

172
454/258

Air temperature responsive

118
454/257

Emergency smoke or fire responsive valve

37
454/259

Including backdraft preventer

64
454/284

Including specific air distributor (e.g., register, etc.)

105
454/305

Air nozzle

53
454/287

Baseboard type

13
454/288

Including portion or element movable during normal use

3
454/292

Ceiling type

96
454/301

Including elongated output slot

26
454/303

Having portion or element movable during normal use

30
454/304

Pivoted

25
454/302

Single, annular output slot

22
454/296

Including perforated or porous element

78
454/297

Having portion or element movable during normal use

31
454/298

Axially movable or sliding valve

23
454/299

Including plural vanes

41
454/300

Concentric

33
454/293

With light fixture

27
454/294

Air passes over lamp

17
454/295

Having adjustable valve

11
454/289

Floor type

56
454/290

Having adjustable valve

68
454/291

With means for liquid contact

13
454/307

Having air deflecting wall extending into room

25
454/306

Having air duct extending into room

121
454/286

Having airway joint with ball or cylinder rotatable in a socket

35
454/330

Having register box, frame, or grating

33
454/331

Including specific grating or grating mounting structure

25
454/332

Readily moveable grating

15
454/308

Having vanes or elongated output slots extending radially

9
454/309

Louvered air distributor

46
454/310

Concentric

13
454/312

Having adjustable vane

10
454/311

Having separate, adjustable internal damper

9
454/321

In housing within room

13
454/313

Moveable

64
454/314

Aligned mutiple, movable sets of vanes

14
454/315

Serially arranged sets

66
454/318

Louver vanes form valve

27
454/319

Plural vanes pivoting about individual axes

59
454/320

Pivot at leading or trailing vane edge

38
454/316

Repositionable set

41
454/317

Rotating disks

9
454/285

Sweeping type

59
454/322

With adjustable valve

37
454/323

Axially movable

17
454/325

Plural blades pivoting along parrallel axes

26
454/326

Adjacent blades pivot in opposing directions

10
454/324

Sliding

54
454/327

Valve opens by pivoting in upstream direction

6
454/329

With air pump

29
454/328

With means for liquid contact

21
454/275

Including specific cover or shield for exterior vent opening

51
454/276

Wall type

49
454/277

Louver

64
454/280

Formed in sheet member

8
454/278

Having moveable vanes

15
454/279

Having serially aligned vane sets

9
454/281

Having specific vane supporting means

6
454/282

In between vane ends

5
454/283

With screen mounting means

19
454/261

Including structure for mixing plural air streams together

39
454/262

And having specific noise inhibiting structure

22
454/269

With air pump

35
454/265

With readily movable air regulating louver, damper, or cover

21
454/266

Pivoted

13
454/267

Plural

19
454/268

Including parrallel louver vanes

8
454/263

With shaped nozzle

16
454/264

And readily movable air regulating louver, damper, or cover

19
454/255

Pressure regulation

49
454/270

Sleeved vent for ceiling, wall, or floor (e.g., thimble)

33
454/271

Wall type

38
454/273

Having adjustable valve

23
454/274

Sliding or axially moveable

21
454/272

With air pump

4
454/260

Through roof eaves or rafters

90
454/333

With adjustable valve (e.g., damper, etc.)

117
454/334

Axially movable or sliding

65
454/335

Plural blades pivoting along parallel axes

55
454/336

Adjacent blades pivot in opposing directions

15
454/338

With air pump

129
454/337

With means for liquid contact

50
454/339

Having outlet airway

50
454/365

Along roof ridge

214
454/357

Having emergency smoke handling feature

30
454/358

Having readliy movable air regulating louver, damper, or cover

68
454/364

Along roof ridge

43
454/359

Including backdraft preventer

85
454/360

Including counter balancing means

12
454/361

Internal damper

11
454/362

Continuously horizontal damper panel

6
454/363

Pivoted damper panel

20
454/367

Having specific cover or shield for exterior vent opening

95
454/368

Exterior neck with enlarged, weather resistant cover

58
454/340

Pressure regulation

22
454/366

Slant roof ventilator

93
454/341

With air pump

75
454/342

And having specific emergency smoke handling structure

45
454/354

Ceiling or wall mounted

66
454/356

Having exterior neck with enlarged, weather resistant cover

17
454/345

Having plural suction intakes

32
454/347

Having readily movable air regulating louver,damper, or cover

33
454/349

Ceiling mounted air pump

26
454/348

Continuously horizontal damper panel

9
454/353

Including backdraft preventer

63
454/352

Plural damper panel

10
454/350

Wall mounted air pump

6
454/351

Plural damper panel

17
454/343

Having specific air pump actuator

68
454/346

Having vibration absorbing or preventing structure

22
454/344

Pump induces draft in exit duct

29
454/355

With movable access cover

9
454/188

Having protecting air current

121
454/193

Cabinet enclosure (e.g., display case, etc.)

60
454/192

Including current adjusting mean

38
454/190

Including plural, layered currents

36
454/191

Including suction outlet

52
454/189

Surrounding protected area

54
454/908

Having rotary retarder

0
454/185

Hollow partition

81
454/186

Having blower

94
454/904

Magnetic means to hold a damper closed

7
454/195

Means combined with door

85
454/196

Means combined with window

27
454/198

Condensation preventer

12
454/197

For bed or couch

5
454/213

Having air passage at window top

32
454/214

Having air passage between sill and bottom of sash

8
454/221

Including louvers

10
454/222

Including readily moveable air regulating means

6
454/216

Including wall for upwardly deflecting inlet air

2
454/217

Having adjustable angle or swingable mounting

0
454/218

Including collapsible or flexible, perpendicular side wall

0
454/219

Having readily moveable air regulating means

2
454/220

Having slidably interconnected sections

5
454/215

Including wall sloping downward from window

3
454/223

With means for liquid contact

2
454/211

Having air passage in sash

11
454/212

Having air passage means within, attaching to, or replacing pane

26
454/224

Having louvers

16
454/226

Having wind deflector

2
454/227

Including backdraft preventer

8
454/199

Skylight

17
454/225

Tilting pane window

3
454/200

With air pump

26
454/201

Cooling air conditioner

37
454/202

Having readily moveable flow control means

28
454/203

With extensible side panel

4
454/204

With mounting or support means

14
454/208

Propeller fan having rotary axis perpendicular to window

13
454/210

With extensible side panel

12
454/209

With mounting means for pump reversal

3
454/205

Recirculation means

5
454/207

With specific filtering means

5
454/206

With specific noise inhibiting structure

8
454/168

Mine

30
454/171

Having inlet and outlet ductwork

8
454/172

Having inlet ductwork

9
454/169

With partition means (e.g., brattice, etc.)

44
454/170

Flexible sheet

26
454/370

Miscellaneous

84
454/906

Noise inhibiting means

108
454/909

Radon prevention

49
454/907

Seat

28
454/173

Storage area for perishables

8
454/174

Harvested crop ventilation

23
454/182

Granular crop or corn ears

52
454/175

Having perforated or slotted duct contacting crop

4
454/177

Horizontal and vertical perforated or slotted ducts

1
454/178

With air pump

2
454/179

Horizontal duct

5
454/180

With air pump

10
454/176

Including insertion means

3
454/181

With air pump

9
454/183

Provision safe

4
454/69

Vehicle (e.g., automobile, etc.)

176
454/76

Aircraft

128
454/77

Freight

8
454/121

Condensation preventer (e.g., defroster, etc.)

268
454/123

Air directed at window exterior

12
454/122

Air directed between double paned window

7
454/127

Having dashboard air distributor (e.g., for windshield, etc.)

98
454/126

Having means for combining heated and unheated air

91
454/125

Having sweeping air distributor

14
454/124

Side or rear window

42
454/118

Freight

54
454/75

Having automatic control means

292
454/141

Having both inlet and outlet airways

47
454/142

Including unitary inlet and outlet housing

13
454/119

Having external connection

24
454/139

Having forced recirculation

110
454/140

Forced recirculation alone or agitating fan

15
454/143

Having inlet airway

122
454/144

Including duct extending along floor

38
454/146

Including exterior cowl inlet

38
454/148

Ducting to heat exchanger

23
454/149

Having exterior door

3
454/147

With moisture deflector or drain

42
454/151

Including exterior rear or rear-side inlet

14
454/150

Including exterior windshield inlet

5
454/152

Including specific air distributor

106
454/155

Having adjustable deflector

180
454/154

Having swiveling nozzle

39
454/153

Sweeping type

25
454/145

Selective inlet, outlet, and closure

36
454/156

With air treatment means

295
454/159

Heating

67
454/161

Having heat exchange core

144
454/160

Having means for combining heated and unheated air

170
454/157

Liquid contact

47
454/158

Porous filter

178
454/162

Having outlet airway

78
454/165

Exterior rear outlet

15
454/164

Exterior side outlet

41
454/163

With current inducing jet

5
454/128

Means for open window (e.g., deflector, etc.)

28
454/135

Adjacent front edge of window

14
454/131

At upper edge of sliding window

38
454/132

Having means to selectively adjust airflow

9
454/133

Having plural air passages

11
454/134

Pivoted window

4
454/129

Sunroof

42
454/130

Windshield or rear window

11
454/70

Pressure regulation

49
454/71

Ventilation of aircraft cabin

78
454/72

Auxiliary control system

22
454/74

Control system having electrical or electronic component

56
454/73

Mechanical operation of control system (e.g., by bellows or diaphragm, etc.)

25
454/83

Railcar, bus, or trailer

10
454/93

Condensation preventer (e.g., defroster, etc.)

12
454/88

Freight

9
454/89

Ice-bunker closure (e.g., for refrigerated railcar)

1
454/90

Refrigerated or heated

16
454/91

With air pump

20
454/92

With air pump

3
454/103

Having both inlet and outlet airways

8
454/104

Including unitary inlet and outlet housing

4
454/105

With air pump

14
454/106

Wind or wheel-axle operated

0
454/94

Having exterior cap closure for vent

19
454/99

Having forced recirculation

10
454/100

Having forced recirulation means alone

6
454/102

Wheel-axle operated fan

0
454/101

Wind-operated fan

1
454/107

Having inlet airway

5
454/108

Including specific air distributor

17
454/109

Having adjustable deflector

5
454/110

Liquid contact

2
454/112

With air pump

9
454/114

Wheel-axle operated

0
454/113

Wind operated

0
454/111

With deflecting separator-type filter

2
454/115

Having outlet airway

7
454/117

With air pump (e.g., wind or wheel-axle operated, etc.)

7
454/116

With current inducing jet

4
454/95

Having window or entry-door ventilation structure

3
454/96

Including dust guard for window opening

3
454/97

Inside of window

1
454/98

Outside of window

0
454/84

Locomotive cab

5
454/85

Condensation preventer (e.g., defroster, etc.)

7
454/86

Including dust guard for cab window opening

1
454/87

Sleeping car

1
454/136

Roof structure

78
454/137

Including duct extending along roof

61
454/138

Having exterior inlet opening over windshield

12
454/120

Seat structure

68
454/78

Waterborne

30
454/79

Freight

3
454/80

Nonperishable bulk foodstuff (e.g., grain ship)

1
454/81

Porthole ventilator

2
454/82

With moisture deflector or drain

16
454/166

Vehicular tunnel

12
454/167

With air pump

5
454/900

Ventilator using solar power

66
454/49

Workstation ventilator (e.g., hood, offtake, etc.)

199
454/56

Covered workbench chamber (e.g., fume hood, etc.)

183
454/57

Having air inlet separate from access opening

102
454/60

And air outlet through access opening

15
454/58

Including flow adjustment means

32
454/59

Responsive to position of access door

33
454/61

Having outlet airway flow adjustment means

78
454/62

Plural airways with adjustable distribution means

25
454/67

Having canopy exhaust hood

114
454/66

Having inlet airway

67
454/63

Movable

145
454/65

Having canopy exhaust hood

57
454/64

Having sliding, communication, airway duct sections

52
454/50

Spray booth

88
454/51

Having air inlet separate from access opening

38
454/52

Ceiling inlet

83
454/53

With outlet air treatment means

108
454/54

With means for liquid contact

99
454/55

Spraying nozzle

31
 
 
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