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Class Information
Number: 251
Name: Valves and valve actuation >
Description: This class provides for means, for regulating flow of a fluid through a passage, either by closing the passage or restricting it by a definite predetermined motion of the closing-element, that are of general application not otherwise provided for.










Class Number Class Name No. of Patents
251/281

Balanced valves

18
251/282

Reciprocating

396
251/283

Rotary

79
251/66

Biased trip

49
251/68

Electrical trip actuation

77
251/69

Trip operated on failure of electric power

71
251/70

With electrical resetting means

10
251/71

Rotary electric motor

30
251/73

Fluid pressure trip actuation

60
251/74

Mechanical movement trip actuation

101
251/72

Weight biased trip

6
251/67

With second diverse control

32
251/336

Biased valve

27
251/337

Springs and spring retainers

403
251/338

Weight biased

16
251/1.1

Blow-out preventers (i.e., cooperating segments of annulus)

112
251/1.2

Deformable annulus

77
251/1.3

Radial reciprocating ram

201
251/901

Curtain type valves

125
251/291

Detachable actuator

205
251/292

Rotary valve

192
251/129.01

Electrically actuated valve

586
251/129.07

Balanced valve

271
251/129.14

Freely rotatable ball valve

206
251/129.06

Having element dimensionally responsive to field

463
251/129.05

Having means to produce digital pulses

231
251/129.08

Having means to produce proportional flow

327
251/129.15

Including solenoid

1389
251/129.21

Coil surrounds valve port or flow line

512
251/129.17

Having diaphragm between coil and opening controlled

229
251/129.16

Having plate-shaped armature

517
251/129.19

Lost motion between valve and valve actuator

201
251/129.2

Mechanical movement between valve and solenoid

215
251/129.22

Solenoid within flow line

62
251/129.18

With means to adjust stroke of armature

264
251/129.04

Remote or follow-up control system for electrical actuator

646
251/129.11

Rotary electric actuator

675
251/129.12

With limit control

232
251/129.13

With speed or braking control

68
251/129.09

Solenoid having plural coils

110
251/129.1

Coils have common axis

322
251/129.02

With means to bias valve open

273
251/129.03

With nonelectrical actuator

267
251/293

Extension for actuator

93
251/294

Flexible actuator (e.g., bowden wire; chain)

202
251/12

Fluid actuated or retarded

70
251/15

Compulsory cut-off after flow period

18
251/21

Actuator connection released on opening of cut-off valve

5
251/19

Auxiliary pilot valve overrides a first pilot valve

0
251/22

Control fluid released into closed build-up chamber

6
251/23

Dashpot interconnects actuator and valve

7
251/20

Forced return of actuator to cut-off position

11
251/16

Serial main line cut-off and manual valves (e.g., hydraulic "fuses")

22
251/17

Interconnected motion

1
251/18

Manual and pilot valves

3
251/48

Dashpot or fluid controlled retarder or timer

89
251/54

Closed fluid circuit dashpot or choke chamber

120
251/49

Latch or trip releasing

3
251/53

Line connected open accumulating chamber

11
251/50

Line pressure connected dashpot or choke chamber

125
251/52

Chamber fills on closing of main valve

40
251/51

With choke by-pass or relief means

51
251/55

With choke by-pass or relief means

17
251/61

Flexible wall expansible chamber reciprocating valve actuator

102
251/61.2

Coaxial actuator, seat and valve

127
251/61.5

Actuator wall between valve and coaxial spring biasing means

91
251/61.4

Coaxial spring biasing means between valve and actuator

115
251/61.3

Valve between coaxial spring biasing means and actuator

53
251/61.1

Flexible wall valves fluid

320
251/14

Fluid and non-fluid actuators

188
251/57

Fluid link or column actuator

156
251/25

Pilot or servo type motor

139
251/26

Alternative pressure sources or pilot valve

113
251/33

Choked pressure type servo motor

68
251/42

Adjustable opening limit for main valve

20
251/43

Main valve biased open by line pressure

51
251/46

Diaphragm or bellows motor element

93
251/44

Differential reaction surface for line pressure

108
251/45

Diaphragm or bellows surface

154
251/38

Pilot valve seated in motor or valve element

119
251/39

Controls inlet to choke chamber

18
251/40

Tilting pilot valve

106
251/41

Remote pilot valve actuation

15
251/35

Variable choke passage according to valve position

58
251/37

With choke or restrictor in main line

12
251/34

With reverse flow prevenging (nonsiphoning)

9
251/36

With separate dashpot or choked fluid retarding chamber

24
251/31

Double or oppositely acting motor units

155
251/30.01

Electrically actuated pilot valve

284
251/30.02

Main valve biased closed by fluid pressure

234
251/30.05

Fluid pressure sole means for biasing valve closed

133
251/30.03

Venting passage within movable main valve

150
251/30.04

Pilot valve movably mounted within or around main valve

104
251/28

Fluid actuated pilot valve

141
251/29

With additional pilot valve control

131
251/32

Latched pilot valve

15
251/27

Servo failure responsive control of main valve

8
251/47

With separate dashpot or choked fluid retarder

30
251/62

Piston type expansible chamber reciprocating valve actuator

229
251/63.5

Coaxial actuator, seat and valve

320
251/63.6

Coaxial spring biasing means between valve and actuator

243
251/63.4

Lost motion, abutment or resilient connection between actuator and valve

194
251/63

Unitary piston and valve

206
251/56

Plural operations (e.g., lifting and rotating rotary valve)

42
251/59

Rotary or oscillatory motor

55
251/24

Venturi or line flow effect assisted

24
251/60

With adjustable limit stop for actuator

52
251/58

With mechanical movement between actuator and valve

380
251/11

Heat or buoyancy motor actuated

381
251/335.1

Hermetic flexible wall seal for actuator

42
251/335.3

Bellows

205
251/335.2

Diaphragm

212
251/76

Impact type actuator

37
251/284

Limit stop

149
251/285

Adjustable

272
251/286

Rotary valve

83
251/288

Stop element on actuator

248
251/287

Stop element on head

51
251/77

Lost motion between actuator and valve

202
251/82

Check valve with external opening and closing means

127
251/83

Spring

84
251/78

Lever

35
251/79

Overload release

16
251/80

Elastic

44
251/81

Slip coupling between actuator and valve

33
251/213

Mechanical movement actuator

30
251/251

Cam

234
251/262

Biased

17
251/263

Spring

172
251/252

Co-axial or parallel axes

74
251/253

Biased

32
251/254

Bi-directional

21
251/255

Non-reciprocating

8
251/256

Encased

14
251/257

Encased with seal

24
251/258

Bi-directional

20
251/259

Cam is finger-like extension

19
251/261

Center crank type

6
251/260

Overhung crank type

11
251/248

Gear

129
251/250.5

Mating segments

33
251/249

Mutilated or geneva gearing

16
251/250

Rectilinear rack

142
251/249.5

Worm type

131
251/231

Lever

77
251/234

Adjustable leverage

22
251/236

Biased

11
251/237

Sliding contact

16
251/238

Spring

23
251/239

Spring co-axial with valve arm

16
251/241

Spring abuts valve stem guide

11
251/240

Spring stop on valve stem

10
251/242

Spring

15
251/243

Co-acts with lever

45
251/244

Co-axial with valve stem

23
251/246

Spring abuts valve stem guide

22
251/245

Spring stop on valve stem

19
251/247

Weight

5
251/233

Leverage variable during operation

23
251/235

Swiveled

18
251/232

Train (plural serial)

30
251/279

Linkage

138
251/280

Toggle

31
251/214

Particularly packed or sealed

564
251/229

Plural dissimilar mechanical movements

236
251/215

Plural motions of valve

98
251/226

Biased

0
251/227

Spring

25
251/218

Encased

29
251/219

Threadlessly coupled to screw

1
251/220

Coupling socket in screw

1
251/221

Threads in removable sleeve

8
251/224

Sleeve flange mounted between body and bonnet

6
251/223

Sleeve is bonnet

22
251/222

Sleeve removably in bonnet

5
251/216

Screw threads in flow path

50
251/225

Threads in removable sleeve

30
251/217

Valve head between actuator and screw

10
251/230

Ratchet

103
251/264

Screw

78
251/277

Biased

5
251/278

Spring

20
251/274

Encased

41
251/275

Biased

3
251/276

Spring

14
251/273

Internal thread

27
251/266

Non-reciprocating actuator

75
251/272

Biased

8
251/267

Internal thread

93
251/268

Inverted cup-shape

36
251/269

Separable actuator bushing

12
251/270

Removable guide

12
251/271

Resiliently mounted actuator

2
251/265

Plural thread

22
251/228

With pivoted valves

101
251/369

Miscellaneous

16
251/905

Movable coil electrical actuator (e.g., voice coil)

16
251/903

Needle valves

74
251/3

Pattern tracer controlled actuator

5
251/295

Pedal actuator

76
251/65

Permanent or constantly energized magnet actuator

626
251/298

Pivoted valves

225
251/303

Biased

108
251/301

Gate

82
251/302

Bifaced

35
251/299

Terminal

38
251/300

Gate

35
251/296

Plural motions of actuator

21
251/290

Plural selective neutral positions for valve or actuator

14
251/318

Reciprocating valve

107
251/330

Actuator controlled stem seal

92
251/331

Diaphragm

532
251/332

Diverse material seal at valve interface

137
251/326

Gate

280
251/327

Bifaced

234
251/329

Bodies

159
251/328

Seats

271
251/333

Particular head and seat cooperation

306
251/334

Elastic deformation

108
251/324

Piston

197
251/325

With internal flow passage

134
251/319

Push or pull operator

94
251/320

Biased

26
251/321

Spring

122
251/323

Spring abuts valve stem guide

71
251/322

Spring stop on valve stem

92
251/212

Relatively movable valve elements form single port closure (e.g., iris diaphragm)

180
251/304

Rotary valves

175
251/315.01

Ball valve

133
251/315.16

Ball construction

133
251/315.07

Eccentric seating

17
251/315.02

Having a particular hardness (i.e., durometric property)

7
251/315.06

Having a swinging actuator

16
251/315.1

Housing construction

75
251/315.13

Assembled around the head

107
251/315.15

Having inseparable head

38
251/315.14

Head removable along one side of flow passage

142
251/315.11

Head removable perpendicular to flow passage

17
251/315.12

At the actuator side (i.e., top entry)

78
251/315.08

Including trunnion opposite axially extending actuating means

92
251/315.09

With removable trunnion cover

25
251/315.03

Of specific material

35
251/315.04

Ceramic (e.g., glass or fired clay)

50
251/315.05

Nonmetallic

90
251/313

Biased

48
251/305

Butterfly

510
251/308

Head and stem connections

184
251/306

Head and/or seat packing

347
251/307

Adjustable

52
251/309

Plug

238
251/310

Axial and radial bore

125
251/311

Lateral inlet and outlet

23
251/312

Retainer at actuator end

74
251/314

Seat or interface seal

121
251/316

Replaceable

76
251/317.01

Carried by head

21
251/317

Deformable material

136
251/210

Sequential opening or closing of serial ports in single flow line (e.g., anti-scoring)

100
251/211

Serial alternately closed ports

15
251/904

Snap fit plug valves

59
251/902

Springs employed as valves

33
251/4

Tube compressors

240
251/5

Fluid pressure actuated

218
251/7

Perpendicularly reciprocating tube contacting element

304
251/8

Screw actuated

67
251/9

Pivoting tube contacting element

195
251/10

U-shaped resilient bar or rod

63
251/6

Roller tube contacting element

102
251/289

Valve actuable from plural positions

31
251/339

Valve actuator extending through fluid inlet or outlet

196
251/349

Valve actuator is inlet or outlet

53
251/354

Biased valve

90
251/350

Detachable tip

8
251/351

Plural motions of valve

77
251/353

Reciprocating spout

96
251/352

Rotary

75
251/341

Valve actuator is valve casing or extension thereof

24
251/348

Biased valve

34
251/342

Jointed or flexible wall

119
251/346

Plural motions of valve

36
251/347

Reciprocating valve

57
251/343

Sleeve valve

36
251/344

Flow passage in sleeve

81
251/345

Rotary

58
251/340

Valve actuator surrounding pipe, inlet or outlet

84
251/84

Valve head movably connected for accommodation to seat

70
251/88

Rotatable only

50
251/87

With single plane swing pivoted connection

29
251/86

With universal connection

168
251/85

With yieldable connection

64
251/900

Valves with o-rings

272
251/356

Valve

124
251/366

Bodies

156
251/367

Sectional

353
251/368

Materials

720
251/358

Reinforced flexible material

86
251/357

Removable seat engaging element

159
251/359

Seats

200
251/364

Head engaging gasket

61
251/360

Removable

145
251/362

Compression or tension retained

83
251/361

Mounted between casing sections

79
251/363

With seal

158
251/365

Retained by seat deformation

25
251/355

With actuation lubricating means

67
251/142

With correlated flow path

23
251/149.9

Flow path joint interlocked with valve or actuator

219
251/148

Pipe coupling or union

265
251/150

Flexible or expansible

20
251/151

Non-rotatable conduit coupling

46
251/152

Valve seat and coupling element removable as a unit

71
251/147

Pipe end (terminal valve)

45
251/145

Pipe side

66
251/146

Clamp type coupling

26
251/144

Tank

398
251/149

Valve operated by joining flow path sections

60
251/149.1

Joining motion includes linear valve operating component

434
251/149.4

Joint includes screw thimble

74
251/149.6

Motion opposed by valve spring

631
251/149.7

Contact only, or friction, joint

101
251/149.5

Of rotatable flow path section

72
251/149.3

Valve motion is transverse to, or opposed to, the linear component

41
251/149.2

Valve rotatably or hingedly mounted

84
251/149.8

Valve operated by motion of flow path

86
251/143

With mounting or support

53
251/153

With particular outlet or inlet

7
251/154

Fluid deflecting means at outlet

11
251/155

Nozzle or spout

29
251/156

With receptacle accommodating feature

8
251/128

With detachable actuator and means to prevent leakage when actuator is detached

19
251/297

With friction detent

286
251/118

With material guide or restrictor

280
251/119

Aspirated stem drain

2
251/127

Baffle or zigzag flow restrictor

295
251/125

Drop forming restrictor

11
251/120

Movable or resilient guide or restrictor

150
251/121

Adjustable guide or restrictor

230
251/122

Tapered metering plug

231
251/126

Spiral guide or spiral restrictor

83
251/123

Valve at point of greatest restriction

38
251/124

Venturi restrictor

30
251/89

With means for blocking or disabling actuator

94
251/89.5

Actuator, or blocking means, includes flow path joint

40
251/90

Attachments

140
251/92

Acting on valve limit stop

17
251/93

Mounted on valve actuator

39
251/91

Requiring modification of valve

8
251/94

Fluid pressure biased latch

51
251/101

Latch manipulator mounted on handle or stem

29
251/102

Constrained linear motion

19
251/104

With latch rigidly associated with manipulator

47
251/105

Latch lug extends transversely to axis of manipulator

14
251/103

With pivoted latch

6
251/106

With transversely movable latch

8
251/107

With pivoted latch

24
251/108

Resilient latch and manipulator

7
251/109

With spring

29
251/110

With reciprocating latch

35
251/111

Latch manipulator mounted on valve body

53
251/113

Constrained linear motion of latch with rigidly associated manipulator

50
251/112

Set screw

15
251/114

With pivoted latch

32
251/115

Resilient latch and manipulator

16
251/116

With spring

23
251/95

Released by non-valving actuator motion

116
251/96

Linear reciprocation of rotary handle

67
251/97

Latch connects actuator to body through head

11
251/98

Pivoted handle

30
251/99

With spring

41
251/100

Rotation of reciprocating handle

44
251/157

With means to increase head and seat contact pressure

8
251/175

Fluid pressure

267
251/193

Gate valve

133
251/195

Bifaced

67
251/200

Carried expander contacts valve casing

6
251/201

Pivoting expander

2
251/202

Faces or carrier contact stationary expander

3
251/197

Faces pressed by subsequently movable expander

35
251/199

Face element directly contacts casing

15
251/198

With second expander

3
251/196

In both closed and open positions

55
251/203

Cam or wedge

62
251/204

Moves with respect to head and seat

48
251/194

Screw sole actuator of expander and valve

4
251/190

Piston

11
251/191

Packing expands with closing

26
251/192

Rotary valve

102
251/170

Seat pressed to valve

34
251/172

Fluid pressure

194
251/173

Butterfly valve

93
251/171

Packing presed by gland

56
251/174

Spring

292
251/187

Separate actuators or actuator motion

50
251/189

Piston with expansible packing

13
251/188

Rotary valve

63
251/176

Spring

80
251/186

Piston

20
251/177

Pivoted valve

24
251/178

Bifaced

6
251/179

Terminal

2
251/180

Rotary valve

59
251/181

Plug

28
251/183

Encased

10
251/184

At actuator end

7
251/182

Expanding

11
251/185

Spring in fluid

30
251/158

With positive reduction

69
251/167

Bifaced

72
251/168

Screw

10
251/169

Toggle

10
251/160

Rotary valve

44
251/162

Cam or wedge

42
251/163

Encased

78
251/161

Independent actuation

64
251/164

Screw

13
251/165

Non-reciprocating

8
251/166

With slip coupling

2
251/159

Seat pressed to valve

72
251/64

With non-fluid retarder

141
251/117

With restrictor in parallel to main valve

100
251/205

With selective flow regulation

248
251/206

Different sized bores in valve head

85
251/207

Rotary plug

63
251/208

Rotary

245
251/209

Plug

139
251/75

With snap action

110
 
 
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