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Class Information
Number: 91
Name: Motors: expansible chamber type >
Description: This class is limited to motors for converting the energy of a pressure fluid into mechanical work in which a charge of simple pressure fluid is admitted to an expansible chamber, the expansion of said chamber converting into work only the original energy of the charge, the charge after expansion of said chamber being exhausted to some place other than whence it came, and in which no energy is extracted from the charge except by expansion of the chamber, said motors when of the reciprocating or oscillating type including control of the fluid.










Class Number Class Name No. of Patents
91/165

Application of motive fluid at different pressures to opposed working member faces

32
91/166

Double acting motor reversed by pressure variation of motive fluid

9
91/55

Combined

7
91/47

Constantly applied motive fluid with controlled venting

52
91/50

Cyclically operable

38
91/49

Fluid vented through working member

50
91/51

Motive fluid constantly applied to and vented from opposed chambers

42
91/48

Plural separately controlled vents

17
91/52

Constantly open throttled exhaust with controlled motive fluid supply

33
91/54

Convertible; or changeable by disassembly or assembly

16
91/355

Cutoff after single complete cycle

8
91/356

Reversal responsive to motive fluid pressure change

22
91/2

Cutoff or control after predetermined number of cycles or revolutions

2
91/218

Cyclically operable

26
91/277

Adjustable working member reversal position (e.g., stroke control, etc.)

31
91/279

Adjustable lost motion connection

5
91/278

Selective diverse supply or exhaust paths for distributor motor

12
91/344

Biasing means moves distributor after predetermined travel (i.e., snap action)

12
91/345

Distributor moves about axis

6
91/346

Spring biased

46
91/347

Coil spring moves laterally relative to coil axis

16
91/245

Clearance control

3
91/230

Codirectional separately supplied working members

3
91/231

One working member supply is distributor controlled

5
91/246

Correlated throttle valve and distributor

3
91/348

Distributor actuator between space piston faces

10
91/349

Distributor moves about axis

2
91/341R

Distributor actuator extends into working chamber

27
91/342

Axially slidable through working face

15
91/343

Moves laterally relative to working member reciprocatory path

4
91/341A

Valves in partition between tandem pistons

6
91/276

Distributor forms traversed movable portion of working chamber wall (423)

31
91/222

Distributor in piston (422)

11
91/226

Communication into piston through peripheral port

9
91/227

Port controlled by piston position

9
91/224

Distributor establishes communication between opposite faces of piston

59
91/229

Distributor operated by abutment with cylinder head

46
91/223

Oscillating piston (e.g., vane, etc.)

2
91/228

Piston carries separate inlet and exhaust valves

9
91/225

Piston traverses pilot port to control distributor motor motive fluid

6
91/329

Distributor located in cylinder between spaced working faces

32
91/327

Distributor moves about axis parallel to working member reciprocatory path

10
91/326

Distributor moves transverse and parallel to same line

1
91/328

Distributor peripherally engages (1) working chamber wall, or (2) cylinder between opposed working faces

11
91/275

Electrically or magnetically actuated or adjusted distributor (459)

85
91/321

Motive fluid constantly applied to one working member face (235) (417)

99
91/236

Multiple exhaust passages (e.g., compression control, etc.)

2
91/244

Controlled by separate relatively movable valves

1
91/239

Distributor for inlet or first exhaust controls second exhaust passage

5
91/237

Exhaust valve has separate valve controlled second exhaust passage therein

2
91/238

Pressure controlled second passage

1
91/240

Fluid pressure actuated valve for second exhaust passage

5
91/241

Compression actuated discharge to motive fluid supply

0
91/242

Exhaust pressure controlled

0
91/243

Working member controlled exhaust port with valved second exhaust passage

9
91/339

Oscillating working member

23
91/340

Distributor reversed by rotated part

1
91/280

Pulsator-actuated distributor (460)

9
91/323

Relatively movable distributors for opposed working chambers

15
91/324

Distributor moves about an axis

1
91/265

Relatively movable inlet and exhaust valves

8
91/269

Biased valve with trip

4
91/268

Exhaust valve closed or held closed by inlet fluid (442)

15
91/270

Inlet and exhaust valve movable about an axis

3
91/267

Lost motion drive from inlet to exhaust valve

4
91/266

Oscillating working member

4
91/271

Reciprocating inlet and exhaust valves

10
91/272

Codirectional with working member movement

8
91/273

Axially seating valves

19
91/264

Relatively movable serial distributors

3
91/247

Timing control by relative adjustment of plural movable fluid control elements

8
91/252

Cut off adjustable relative to admission

0
91/262

Adjustable cam or cam follower actuated inlet valve

0
91/263

Adjustable fluid control for fluid actuated inlet valve

0
91/260

Biased inlet valve with adjustable tripping means

0
91/261

Inlet valve movable about an axis

0
91/253

Inlet controlled by relatively cyclically moved elements

0
91/255

Adjustable fluid control for fluid actuated cut off

1
91/254

Biased cut off with adjustable trip

0
91/256

Cut off adjustable relative to reciprocating admission element

0
91/258

Arcuate adjustment of cut off

0
91/259

Cut off adjustable codirectional with admission element movement

0
91/257

Oscillating admission element

0
91/248

Electrical adjustment

8
91/249

With relative adjustment of plural adjustable fluid control elements

2
91/250

Adjustable inlet and exhaust events

3
91/251

With adjustable release and compression events

0
91/232

Valveless distribution

8
91/233

Distribution by reciprocating working member moving about an axis

2
91/234

Working member formed to provide internal fluid flow passage

45
91/220

With condition responsive stop means

10
91/221

Speed

3
91/219

With dwell

15
91/274

With independent throttle adjustment for one side of double-acting motor

5
91/322

With independently operable means to lock distributor

4
91/330

With independently operable means to move or means to adjust movement of distributor

20
91/331

Means adjusts motion transmission from working member to distributor

3
91/332

Adjusting means comprises motor

0
91/333

Speed controlled

0
91/334

To reverse direction of rotation of interposed shaft

0
91/337

With means independent of distributor reversing parts to cyclically hold distributor

23
91/338

Positive hold (e.g., tripped type, etc.)

5
91/335

With throttle valve or distributor throttle adjustment

8
91/336

Speed controlled

8
91/235

Working chamber receives controlled motive fluid supply from opposed chamber having constant supply (321) (417)

37
91/325

Working member controlled inlet or exhaust port (e.g., semi-valveless, etc.)

46
91/281

Working member controlled motive fluid for distributor motor

10
91/289

Adjustable means to retard or lock distributor motor

5
91/315

Distributor moves about an axis

2
91/316

Distributor moves laterally relative to working member reciprocatory path

5
91/286

Distributor or distributor motor mechanically moved cyclically to control actuating fluid for distributor motor

10
91/288

Distributor motor mechanically moved about axis

2
91/287

Movement of relatively movable pilot mechanically moves distributor

5
91/282

Fluid supply through diverse paths to distributor motor chamber

3
91/283

Path controlled by independently operable means

1
91/284

Independent means to adjust distributor motor supply or exhaust passage

7
91/285

Separately adjusts one chamber of double-acting distributor motor

3
91/318

Motive fluid build-up at end of working stroke reverses distributor

32
91/304

Pilot valve controlled distributor motor (461)

29
91/312

Distributor motor working member is valve seat for pilot valve

7
91/308

Fluid-operated pilot valve

44
91/313

Pilot valve actuator extends into working chamber

56
91/310

Pilot valve moves about an axis

3
91/311

Pilot valve moves laterally relative to working member reciprocatory path

11
91/307

Pilot valve relieves constantly supplied distributor motor fluid

27
91/305

Plural pilot valves

11
91/306

Independent

34
91/309

With distributor motor reversal by constantly applied fluid pressure

19
91/314

Working member reverses pilot through part movable relative to both

13
91/303

Working member adapted to directly mechanically reverse distributor

40
91/317

Working member compresses fluid to reverse distributor

31
91/319

Working member traverses pilot passage to control distributor motor

36
91/320

Port in piston between opposed working faces

12
91/290

Working member traverses pilot port in working chamber side wall

29
91/296

Constantly open exhaust from distributor working chamber

0
91/302

Pilot port relieved into working chamber having working member controlled exhaust port

3
91/295

Plural ports control relatively movable distributor motors

2
91/291

Port controls separate motor for intermediate pilot valve

15
91/292

Distributor controls passage from port

1
91/301

With control of distributor motor supply or exhaust port by distributor working member

2
91/300

With distributor reversal by constantly supplied motive fluid

42
91/299

With distributor reversal by fluid compressed by working member

10
91/297

With passage for pilot fluid in working member

7
91/298

Working member passage supplies distributor motive fluid

9
91/293

With passage from port controlled by pilot valve

4
91/294

Pilot valve operated by separately controlled fluid motor

1
91/350

Working member reverses distributor through part movable relative to both

39
91/352

Distributor moves about axis

13
91/353

Distributor moves laterally relative to working member reciprocatory path

4
91/351

Meshing rotary gear

4
91/354

Rotated part

3
91/415

Differential

39
91/417R

Motive fluid constantly applied to one working member face (235) (321)

137
91/417A

Staplers having two diameter pistons

9
91/416

Opposing pressure applied by bypassing

51
91/DIG.1

Digital

6
91/53

Engine rotating or starting type

5
91/DIG.2

Exhaust throttled motor control

9
91/167R

Extension of unit having separately controlled working chambers equals sum of individual chamber extensions

59
91/168

Control of motive fluid for one working member in response to position of second

21
91/167A

Vane

5
91/6

Fluid supply through diverse paths to single expansible chamber

113
91/32

Activation of one path disables second path

75
91/33

Pressure operated

35
91/11

Changeable from multiple expansion to simple operation

0
91/12

Cyclically operable motor with port reversing

2
91/13

By shifting distributor seat

0
91/14

By shifting distributor

2
91/15

Selector valve between distributor and motor

1
91/19

Diverse paths used to control extent of working member travel

12
91/16

Drifting or coasting on lower pressure

3
91/18

Pressure control of drifting fluid

0
91/17

With speed responsive cutoff of drifting fluid

1
91/31

One path includes restriction

127
91/20

Position responsive

23
91/24

Additional inlet path opened in response to position

18
91/25

Working member or part carried thereby uncovers inlet port

33
91/26

First path has check valve or selectively adjustable throttle

23
91/27

Plural simultaneous paths, one cutoff in response to position

21
91/22

Preliminary inlet to contracting chamber (e.g., cushioning, etc.)

5
91/23

By bypassing from expanding chamber (399)

3
91/21

Rotating working member or chamber

1
91/28

Second path activated in response to pressure or flow in first path

35
91/29

By pressure rise in first path

69
91/7

Selective cyclic and noncyclic operation or parking

4
91/8

Semi-compound type

1
91/9

Changeable by shiftable distributor

1
91/10

With condition responsive change-over valve

1
91/30

Serially arranged reversing valves

5
91/6.5

Three or more cylinders arranged in parallel, radial or conical relationship with rotary transmission axis

30
91/4R

Hydro-pneumatic

73
91/4A

With float mechanism

14
91/35

Independently operated timer, delay, pattern or cyclic control

49
91/38

Fluid actuated valve with volume chamber delay means

21
91/39

Independent distributor actuation for cyclic control

41
91/40

Fluid actuated distributor motor

26
91/36

Of independently movable working members

33
91/37

Pattern or template control

16
91/3

Jet control type

30
91/DIG.3

Large area valve

3
91/DIG.4

Magnets

34
91/471

Miscellaneous (e.g., methods, etc.)

44
91/196

Moving cylinder

23
91/216R

Cylinder and piston have relative reciprocation on fixed axis

16
91/216B

Cyclical moving cylinder

15
91/216A

Moving cylinder having follow-up

17
91/217

Reciprocating piston and cylinder

30
91/210

Oscillating cylinder

9
91/211

Cooperating valve ports in cylinder and fixed member

1
91/214

Ported arcuate slide face on which cylinder moves

0
91/212

Ported end bearing

0
91/213

Ported trunnion

0
91/215

Cylinder carried valve operated by fixed actuator

1
91/197

Plural rigidly connected rotary cylinders

17
91/206

With integral exterior working face

0
91/207

Both faces urged in single direction

6
91/209

Fluid to exterior face controlled by cylinder position

3
91/208

Fluid to exterior face controlled by motive fluid pressure

0
91/152

Multiple expansion

6
91/156

Concentric working chambers

1
91/164

Dual, rigidly connected high and low pressure faces

6
91/153

Duplex

1
91/154

Cut-off or reversing

0
91/159

Expansion between relatively movable working members

2
91/160

Double acting high and low pressure working members

0
91/161

Fluid acts on each working member in single direction

3
91/162

High and low pressure faces on each working member

0
91/163

Fluid expanded through working member

0
91/157

Relative valving adjustment between high and low pressure working chambers

0
91/158

Adjustment for valving for plural chambers

0
91/155

With fluid actuated distributor

1
91/508

Plural relatively movable or rigidly interconnected working members

64
91/511

Condition responsive means for modifying working member operation

35
91/513

Condition is position of fluid control member of motor other than motor whose operation is modified

40
91/512

Condition is that of a load driven by a working member other than working member having its operation modified

43
91/517

Condition sensed is working member speed or working fluid pressure of another motor (i.e., fluid pressure or flow to or from expansible chamber of the other motor)

160
91/518

Motive fluid control valve responsive to pressure in supply line to or exhaust line from motor which it modifies

165
91/514

Pressure responsive valve divides motive fluid between motors

29
91/515

For synchronization of motors

47
91/516

To give one motor priority to motive fluid over another

146
91/509

Having (1) stand-by or (2) redundant means enabling load to be driven upon failure of primary load moving means

60
91/510

Stand-by means utilizes an auxiliary motive fluid source for another working member to drive same load

42
91/520

Motors connected in series

111
91/535

Relatively movable working members of unequal cross-sectional areas

21
91/521

Separate valve means actuatable by a common nonmanual actuator or separately actuatable means with common manual actuator

37
91/523

Simultaneously actuated separate valve means

44
91/524

Successive actuation of separate valve means

29
91/522

With means to independently actuate valve means

38
91/533

Single valve for plural rigidly connected working members

54
91/534

Single valve for relatively movable working members driving common load

40
91/536

Single valve for relatively movable working members

66
91/532

With means for proportioning motive fluid supply to plural motors

90
91/519

With means for selectively changing the speed or force exerted on load by the selective application of motive fluid in a single direction to one or more working members

141
91/525

With means to control the working fluid to one working member for movement relative to another without controlling the working fluid to the other working member by said means

38
91/530

Control means includes separate control valves for each working member

93
91/531

With additional control valve in series with at least one separate control valve in supply line to one of motors

71
91/528

Control means is fluid pressure operated valve

14
91/529

Fluid pressure operated valve controlled by a pilot valve

78
91/527

Valve controlled by remote means (e.g., radio, electromagnetic, etc.)

47
91/526

With multiway valve in series with control means

29
91/390

Position maintaining type

50
91/170R

Relatively movable working members with one having motive fluid controlled by, movably interconnected with or moved by another

49
91/181

Interconnected working members in communicating chamber portions

11
91/182

Means connecting working members actuates common part controlling motive fluid for the members

3
91/170MP

Mine props

41
91/176

Moving cylinders

34
91/173

One working member forms movable chamber for another

49
91/172

One working member oppositely biased by another

13
91/177

Oscillating working members

5
91/189R

Position of one working member controls motive fluid for another

101
91/190

Changeable to plural self-controlled working members

0
91/191

Each cyclically controls another (e.g., duplex, etc.)

9
91/193

Fluid operated valve controlled by relatively movable working member

13
91/194

Rotating output shaft type (e.g., locomotive or reversing means, etc.)

4
91/195

With self-control

1
91/192

With three or more working members

6
91/189A

Piston or rod directly valves passage

50
91/178

Single valve unit controlling plural working chambers

27
91/179

Oscillating valve

3
91/180

Rotary valve

34
91/171

Synchronizing in response to sensed difference in positions

64
91/174

With connection to relatively movable output member disposed between spaced unitary end faces

2
91/183

With means interconnecting working members to cause relative motion

17
91/186

Connection includes toothed gearing or rocking lever

28
91/187

Means varies cyclic relation between working member and control valve therefor

8
91/188

Motive fluid control actuator includes cam or crank rigid with means connecting working members

11
91/185

Motive fluid control by pitman swing or intermittent contact with working member

4
91/184

Working member covers port to control motive fluid

4
91/61

Rotary and reciprocating working members

29
91/357

Selectively usable or positionable working member controlled vent in chamber wall (402)

12
91/151

Serially formed expanding working chambers (e.g., endless, etc.)

0
91/34

Single acting, changeable to or from double acting

4
91/169

Single chamber formed by mutually relatively movable cylinder, sleeve and piston

22
91/472

Three or more cylinders arranged in parallel radial or conical relationship with rotary transmission axis

22
91/473

Condition responsive control of drive transmission

18
91/484

Control valve seating surface contact maintained by fluid pressure bias

13
91/485

Disc valve

37
91/499

Cylinders parallel to rotation axis

315
91/501

Cylinders contain plural oppositely movable pistons

20
91/502

Including plural axially spaced working chambers (e.g., double-acting working members, etc.)

33
91/500

Plural angularly disposed cylinder banks

17
91/507

Positive bidirectional drive of reciprocating members

20
91/503

Rotary spool valve

39
91/504

Stroke control

50
91/505

By varying reaction plate inclination relative to cylinder axes

174
91/506

Motor operated

183
91/475

Having yieldable drive transmission

4
91/482

Means varies cyclic relation between reciprocating member and control valve therefor

17
91/483

By adjustment of transmission or reaction element

10
91/486

Motive fluid bypass to or from assembly

30
91/488

Fluid conducting passage disposed within piston

74
91/487

Separate passage directs motive fluid to or from valve interface

35
91/489

Valved

17
91/490

Motive fluid supply or discharge through piston

20
91/491

Radially disposed cylinders

182
91/498

Cooperating valve ports in cylinder and relatively movable central member

77
91/494

Cylinders and pistons form or coact with respective common elements having limited relative rotary movement

17
91/495

Cylinders or pistons pinned to common element

15
91/492

Plural banks

65
91/496

Positive bidirectional drive or reciprocating members

8
91/493

Rigidly connected pistons reciprocate within rigidly connected cylinders

23
91/497

Stroke control

80
91/474

Separate fluid supply or discharge paths

6
91/476

Separate motive fluid control for each working chamber

18
91/479

Control by moving cylinder or liner

0
91/477

Each piston acts as valve for different working chamber

6
91/478

Means varies cyclic relation between reciprocating member and control valve therefor

4
91/480

Mechanically actuated valves

20
91/481

Radial cylinders

14
91/59

Torque responsive motive fluid control

36
91/391R

With alternative manual actuation of load

95
91/391A

Alternate pedal positions

7
91/41

With correlated control of motive fluid and locking means

31
91/42

By electrical control means

22
91/45

Common or interconnected valve means control motive fluid and fluid for locking means

52
91/44

Sequential operation of locking means and motive fluid control

75
91/43

Working member position control of motive fluid and locking means

27
91/46

With interrelated control of motive fluid and lubricant

15
91/418

With motive fluid valve

42
91/433

Both inlet and exhaust controlled by motive fluid pressure in supply line or chamber

228
91/434

With manual valve actuating means responsive to motive fluid pressure (e.g., "feel", etc.)

108
91/431

Continuous motive fluid flow through chamber in motor idle condition

40
91/420

Contracting chamber exhaust valve controlled by expanding chamber pressure or flow

299
91/435

Controlled by rate of movement of working member

35
91/429

Dither valve

28
91/459

Electrically operated (275) (361)

434
91/421

Expanding chamber inlet controlled by contracting chamber pressure or flow

77
91/462

For double-acting motor

45
91/464

Means to simultaneously open working chambers to inlet or exhaust

98
91/465

Relatively movable unitary inlet and exhaust valves for opposed working chambers

98
91/466

Unitary inlet and exhaust valve means for opposed working chambers

43
91/467

Valve means moves about an axis

104
91/463

With means to provide unequal flow rates to or from opposed working chambers

43
91/440

For exhausting contracting working chamber to expanding opposed nonworking

27
91/437

Independent control of bypass between opposed working chambers

139
91/438

Held closed by motive fluid pressure

32
91/439

Bypass through supply line

8
91/432

Inlet check valve with means for disconnectable supply line (468)

29
91/436

Inlet fluid supplemented by controlled fluid pressurized in opposed contracting chamber

165
91/428

Manual control carried on or operated from load or output element

16
91/461

Pilot valve (304)

439
91/453

Plural actuators for single valve means (367)

43
91/427

Plural manual control stations

16
91/449

Plural separately controlled waste passages for single working chamber

59
91/450

One passage controlled by inlet and exhaust valve

62
91/451

Another passage controlled by motive fluid pressure or flow responsive valve (468)

151
91/452

One passage controlled by motive fluid pressure or flow-responsive valve (468)

74
91/460

Pulsator actuator for valve (280)

45
91/454

Relatively movable inlet and exhaust valves for single working chamber

180
91/455

One valve forms unitary part of valve controlling opposed working chamber

26
91/456

One valve moves about an axis

1
91/457

Single actuating means moves both valves

54
91/444

Relatively movable serial valves

76
91/448

In supply path

199
91/446

Including motive fluid pressure or flow responsive valve (468)

361
91/447

Between working chamber and inlet and exhaust valve

245
91/445

Stop valve between working chamber and inlet and exhaust valve

170
91/419

Responsive to (1) motive fluid temperature or state, or (2) motor position or orientation

40
91/468

Self-acting valve (432) (446) (451) (452)

100
91/442

Self-opening exhaust valve held closed by inlet pressure (268)

51
91/458

Speed governor operated (366)

16
91/443

To provide unequal inlet and exhaust flow rates to single working chamber

130
91/424

Two hand control

40
91/425

With motor-controlled holding means for valve

0
91/469

Unitary inlet and exhaust valve for single working chamber

30
91/470

Valve moves about an axis

19
91/423

Valve part forms traversed movable portion of working chamber wall (276)

2
91/430

Valve parts continuously relatively moved for nonvalving function

2
91/422

Valved piston (222)

144
91/441

With ambient fluid inlet valve to expanding working chamber

35
91/426

With fluid pressure holding means for valve

44
91/1

With signal, indicator or inspection means

200
91/5

Working member moved by stored motive fluid charge

60
91/358R

Working member position feedback to motive fluid control

38
91/389

Adjustable

13
91/385

Bias-type input and feedback signal means

9
91/386

Feedback bias means adjustable

13
91/387

Spring-type feedback bias means

66
91/361

Electrical input and feedback signal means (459)

287
91/363R

Follower type

98
91/363A

Fail safe control

61
91/362

Means provides incremental movements (e.g., stepper type, etc.)

19
91/388

Fluid operated

57
91/368

Follower type

48
91/383

Cable

12
91/382

Cam and follower

40
91/381

Differential gearing

12
91/379

Disproportional rate of response

2
91/384

Floating link

27
91/374

Plural movable valve parts

46
91/376R

One movable part unitary with working member

593
91/378

Axially movable spool-type valve

50
91/377

Lost motion linkage connecting valve, load and working member

11
91/376A

Vane

14
91/375R

Valve part moves about an axis

157
91/375A

Torsion bar

322
91/380

Screw and follower (e.g., nut, etc.)

45
91/370

With motor chamber pressure reaction on valve

25
91/372

Spring-loaded valve

57
91/373

With lost motion between input and reaction member

21
91/371

With valve means limiting reaction pressure

29
91/369.1

With relatively movable working and output members reacting on input member

105
91/369.4

Lever reaction means

58
91/369.2

Rubber block reaction means

277
91/369.3

And transverse valve key

97
91/367

Plural input signal means for single motor valve (453)

75
91/359

Regenerative or positive feedback type

9
91/366

Speed governor controlled input signal (458)

8
91/358A

Valve locking means

19
91/365

With main valve position feedback to pilot valve

33
91/364

With means to vary feedback signal in response to rate of working member movement

34
91/360

With safety means operable upon input signal loss

7
91/392

Working member position responsive motive fluid control

63
91/397

Alternate control of inlet and exhaust for same chamber at opposite ends of stroke

22
91/399

Bypassing between expanding chamber and closed or throttled contracting chamber (e.g., cushioning, etc.) (23)

42
91/404

Exhaust control

33
91/405

Throttling (e.g., cushioning, etc.)

67
91/407

By successively controlling or controlling less than all of plural exhaust passages

27
91/408

Working member covers exhaust port (409)

51
91/406

Exhaust valve with bleed passage therein

15
91/409

Working member covers exhaust port in contracting chamber (408)

38
91/403

Position controls actuating fluid for valve

39
91/393

Position initiated timing or delay means

13
91/398

Simultaneous control of inlet and exhaust of same chamber

19
91/400

Venting expanding chamber

33
91/401

Through working member

69
91/402

Working member overrides exhaust port (357)

48
91/394

Working member carries part within working chamber which controls port in chamber end wall

59
91/396

Part forms throttle member

38
91/395

Part movable with respect to working member

48
91/410

Working member controls relatively movable inlet valve

59
 
 
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