US Patent Class 251
VALVES AND VALVE ACTUATION



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Current as of: June, 1999
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  DF  CLASS NOTES
1.1  DF  BLOW-OUT PREVENTERS (I.E., COOPERATING SEGMENTS OF ANNULUS)
1.2  DF  .~ Deformable annulus
1.3  DF  .~ Radial reciprocating ram
3  DF  PATTERN TRACER CONTROLLED ACTUATOR
4  DF  TUBE COMPRESSORS
5  DF  .~ Fluid pressure actuated
6  DF  .~ Roller tube contacting element
7  DF  .~ Perpendicularly reciprocating tube contacting element
8  DF  .~.~ Screw actuated
9  DF  .~ Pivoting tube contacting element
10  DF  .~.~ U-shaped resilient bar or rod
11  DF  HEAT OR BUOYANCY MOTOR ACTUATED
12  DF  FLUID ACTUATED OR RETARDED
14  DF  .~ Fluid and non-fluid actuators
15  DF  .~ Compulsory cut-off after flow period
16  DF  .~.~ Serial main line cut-off and manual valves (e.g., hydraulic "fuses")
17  DF  .~.~.~ Interconnected motion
18  DF  .~.~.~.~ Manual and pilot valves
19  DF  .~.~ Auxiliary pilot valve overrides a first pilot valve
20  DF  .~.~ Forced return of actuator to cut-off position
21  DF  .~.~ Actuator connection released on opening of cut-off valve
22  DF  .~.~ Control fluid released into closed build-up chamber
23  DF  .~.~ Dashpot interconnects actuator and valve
24  DF  .~ Venturi or line flow effect assisted
25  DF  .~ Pilot or servo type motor
26  DF  .~.~ Alternative pressure sources or pilot valve
27  DF  .~.~ Servo failure responsive control of main valve
28  DF  .~.~ Fluid actuated pilot valve
29  DF  .~.~.~ With additional pilot valve control
30.01  DF  .~.~ Electrically actuated pilot valve
30.02  DF  .~.~.~ Main valve biased closed by fluid pressure
30.03  DF  .~.~.~.~ Venting passage within movable main valve
30.04  DF  .~.~.~.~.~ Pilot valve movably mounted within or around main valve
30.05  DF  .~.~.~.~ Fluid pressure sole means for biasing valve closed
31  DF  .~.~ Double or oppositely acting motor units
32  DF  .~.~ Latched pilot valve
33  DF  .~.~ Choked pressure type servo motor
34  DF  .~.~.~ With reverse flow prevenging (nonsiphoning)
35  DF  .~.~.~ Variable choke passage according to valve position
36  DF  .~.~.~ With separate dashpot or choked fluid retarding chamber
37  DF  .~.~.~ With choke or restrictor in main line
38  DF  .~.~.~ Pilot valve seated in motor or valve element
39  DF  .~.~.~.~ Controls inlet to choke chamber
40  DF  .~.~.~.~ Tilting pilot valve
41  DF  .~.~.~ Remote pilot valve actuation
42  DF  .~.~.~ Adjustable opening limit for main valve
43  DF  .~.~.~ Main valve biased open by line pressure
44  DF  .~.~.~.~ Differential reaction surface for line pressure
45  DF  .~.~.~.~.~ Diaphragm or bellows surface
46  DF  .~.~.~.~ Diaphragm or bellows motor element
47  DF  .~.~ With separate dashpot or choked fluid retarder
48  DF  .~ Dashpot or fluid controlled retarder or timer
49  DF  .~.~ Latch or trip releasing
50  DF  .~.~ Line pressure connected dashpot or choke chamber
51  DF  .~.~.~ With choke by-pass or relief means
52  DF  .~.~.~ Chamber fills on closing of main valve
53  DF  .~.~ Line connected open accumulating chamber
54  DF  .~.~ Closed fluid circuit dashpot or choke chamber
55  DF  .~.~ With choke by-pass or relief means
56  DF  .~ Plural operations (e.g., lifting and rotating rotary valve)
57  DF  .~ Fluid link or column actuator
58  DF  .~ With mechanical movement between actuator and valve
59  DF  .~ Rotary or oscillatory motor
60  DF  .~ With adjustable limit stop for actuator
61  DF  .~ Flexible wall expansible chamber reciprocating valve actuator
61.1  DF  .~.~ Flexible wall valves fluid
61.2  DF  .~.~ Coaxial actuator, seat and valve
61.3  DF  .~.~.~ Valve between coaxial spring biasing means and actuator
61.4  DF  .~.~.~ Coaxial spring biasing means between valve and actuator
61.5  DF  .~.~.~ Actuator wall between valve and coaxial spring biasing means
62  DF  .~ Piston type expansible chamber reciprocating valve actuator
63  DF  .~.~ Unitary piston and valve
63.4  DF  .~.~ Lost motion, abutment or resilient connection between actuator and valve
63.5  DF  .~.~ Coaxial actuator, seat and valve
63.6  DF  .~.~.~ Coaxial spring biasing means between valve and actuator
64  DF  WITH NON-FLUID RETARDER
65  DF  PERMANENT OR CONSTANTLY ENERGIZED MAGNET ACTUATOR
66  DF  BIASED TRIP
67  DF  .~ With second diverse control
68  DF  .~ Electrical trip actuation
69  DF  .~.~ Trip operated on failure of electric power
70  DF  .~.~ With electrical resetting means
71  DF  .~.~.~ Rotary electric motor
72  DF  .~ Weight biased trip
73  DF  .~ Fluid pressure trip actuation
74  DF  .~ Mechanical movement trip actuation
75  DF  WITH SNAP ACTION
76  DF  IMPACT TYPE ACTUATOR
77  DF  LOST MOTION BETWEEN ACTUATOR AND VALVE
78  DF  .~ Lever
79  DF  .~ Overload release
80  DF  .~.~ Elastic
81  DF  .~.~ Slip coupling between actuator and valve
82  DF  .~ Check valve with external opening and closing means
83  DF  .~.~ Spring
84  DF  VALVE HEAD MOVABLY CONNECTED FOR ACCOMMODATION TO SEAT
85  DF  .~ With yieldable connection
86  DF  .~ With universal connection
87  DF  .~ With single plane swing pivoted connection
88  DF  .~ Rotatable only
89  DF  WITH MEANS FOR BLOCKING OR DISABLING ACTUATOR
89.5  DF  .~ Actuator, or blocking means, includes flow path joint
90  DF  .~ Attachments
91  DF  .~.~ Requiring modification of valve
92  DF  .~.~ Acting on valve limit stop
93  DF  .~.~.~ Mounted on valve actuator
94  DF  .~ Fluid pressure biased latch
95  DF  .~ Released by non-valving actuator motion
96  DF  .~.~ Linear reciprocation of rotary handle
97  DF  .~.~.~ Latch connects actuator to body through head
98  DF  .~.~ Pivoted handle
99  DF  .~.~.~ With spring
100  DF  .~.~ Rotation of reciprocating handle
101  DF  .~ Latch manipulator mounted on handle or stem
102  DF  .~.~ Constrained linear motion
103  DF  .~.~.~ With pivoted latch
104  DF  .~.~.~ With latch rigidly associated with manipulator
105  DF  .~.~.~.~ Latch lug extends transversely to axis of manipulator
106  DF  .~.~.~ With transversely movable latch
107  DF  .~.~ With pivoted latch
108  DF  .~.~.~ Resilient latch and manipulator
109  DF  .~.~.~ With spring
110  DF  .~.~ With reciprocating latch
111  DF  .~ Latch manipulator mounted on valve body
112  DF  .~.~ Set screw
113  DF  .~.~ Constrained linear motion of latch with rigidly associated manipulator
114  DF  .~.~ With pivoted latch
115  DF  .~.~.~ Resilient latch and manipulator
116  DF  .~.~.~ With spring
117  DF  WITH RESTRICTOR IN PARALLEL TO MAIN VALVE
118  DF  WITH MATERIAL GUIDE OR RESTRICTOR
119  DF  .~ Aspirated stem drain
120  DF  .~ Movable or resilient guide or restrictor
121  DF  .~.~ Adjustable guide or restrictor
122  DF  .~.~.~ Tapered metering plug
123  DF  .~ Valve at point of greatest restriction
124  DF  .~.~ Venturi restrictor
125  DF  .~ Drop forming restrictor
126  DF  .~ Spiral guide or spiral restrictor
127  DF  .~ Baffle or zigzag flow restrictor
128  DF  WITH DETACHABLE ACTUATOR AND MEANS TO PREVENT LEAKAGE WHEN ACTUATOR IS DETACHED
129.01  DF  ELECTRICALLY ACTUATED VALVE
129.02  DF  .~ With means to bias valve open
129.03  DF  .~ With nonelectrical actuator
129.04  DF  .~ Remote or follow-up control system for electrical actuator
129.05  DF  .~ Having means to produce digital pulses
129.06  DF  .~ Having element dimensionally responsive to field
129.07  DF  .~ Balanced valve
129.08  DF  .~ Having means to produce proportional flow
129.09  DF  .~ Solenoid having plural coils
129.1  DD  .~.~ Coils have common axis
129.11  DF  .~ Rotary electric actuator
129.12  DF  .~.~ With limit control
129.13  DF  .~.~ With speed or braking control
129.14  DF  .~ Freely rotatable ball valve
129.15  DF  .~ Including solenoid
129.16  DF  .~.~ Having plate-shaped armature
129.17  DF  .~.~ Having diaphragm between coil and opening controlled
129.18  DF  .~.~ With means to adjust stroke of armature
129.19  DF  .~.~ Lost motion between valve and valve actuator
129.2  DD  .~.~ Mechanical movement between valve and solenoid
129.21  DF  .~.~ Coil surrounds valve port or flow line
129.22  DF  .~.~ Solenoid within flow line
142  DF  WITH CORRELATED FLOW PATH
149  DF  .~ Valve operated by joining flow path sections
149.1  DF  .~.~ Joining motion includes linear valve operating component
149.2  DF  .~.~.~ Valve rotatably or hingedly mounted
149.3  DF  .~.~.~ Valve motion is transverse to, or opposed to, the linear component
149.4  DF  .~.~.~ Joint includes screw thimble
149.5  DF  .~.~.~ Of rotatable flow path section
149.6  DF  .~.~.~ Motion opposed by valve spring
149.7  DF  .~.~.~.~ Contact only, or friction, joint
149.8  DF  .~ Valve operated by motion of flow path
149.9  DF  .~ Flow path joint interlocked with valve or actuator
144  DF  .~ Tank
145  DF  .~ Pipe side
146  DF  .~.~ Clamp type coupling
147  DF  .~ Pipe end (terminal valve)
148  DF  .~ Pipe coupling or union
150  DF  .~.~ Flexible or expansible
151  DF  .~.~ Non-rotatable conduit coupling
152  DF  .~.~ Valve seat and coupling element removable as a unit
143  DF  .~ With mounting or support
153  DF  .~ With particular outlet or inlet
154  DF  .~.~ Fluid deflecting means at outlet
155  DF  .~.~ Nozzle or spout
156  DF  .~.~.~ With receptacle accommodating feature
157  DF  WITH MEANS TO INCREASE HEAD AND SEAT CONTACT PRESSURE
158  DF  .~ With positive reduction
159  DF  .~.~ Seat pressed to valve
160  DF  .~.~ Rotary valve
161  DF  .~.~.~ Independent actuation
162  DF  .~.~.~ Cam or wedge
163  DF  .~.~.~.~ Encased
164  DF  .~.~.~ Screw
165  DF  .~.~.~.~ Non-reciprocating
166  DF  .~.~.~.~.~ With slip coupling
167  DF  .~.~ Bifaced
168  DF  .~.~.~ Screw
169  DF  .~.~.~ Toggle
170  DF  .~ Seat pressed to valve
171  DF  .~.~ Packing presed by gland
172  DF  .~.~ Fluid pressure
173  DF  .~.~.~ Butterfly valve
174  DF  .~.~ Spring
175  DF  .~ Fluid pressure
176  DF  .~ Spring
177  DF  .~.~ Pivoted valve
178  DF  .~.~.~ Bifaced
179  DF  .~.~.~ Terminal
180  DF  .~.~ Rotary valve
181  DF  .~.~.~ Plug
182  DF  .~.~.~.~ Expanding
183  DF  .~.~.~.~ Encased
184  DF  .~.~.~.~.~ At actuator end
185  DF  .~.~.~ Spring in fluid
186  DF  .~.~ Piston
187  DF  .~ Separate actuators or actuator motion
188  DF  .~.~ Rotary valve
189  DF  .~.~ Piston with expansible packing
190  DF  .~ Piston
191  DF  .~.~ Packing expands with closing
192  DF  .~ Rotary valve
193  DF  .~ Gate valve
194  DF  .~.~ Screw sole actuator of expander and valve
195  DF  .~.~ Bifaced
196  DF  .~.~.~ In both closed and open positions
197  DF  .~.~.~ Faces pressed by subsequently movable expander
198  DF  .~.~.~.~ With second expander
199  DF  .~.~.~.~ Face element directly contacts casing
200  DF  .~.~.~ Carried expander contacts valve casing
201  DF  .~.~.~.~ Pivoting expander
202  DF  .~.~.~ Faces or carrier contact stationary expander
203  DF  .~.~ Cam or wedge
204  DF  .~.~.~ Moves with respect to head and seat
205  DF  WITH SELECTIVE FLOW REGULATION
206  DF  .~ Different sized bores in valve head
207  DF  .~.~ Rotary plug
208  DF  .~ Rotary
209  DF  .~.~ Plug
210  DF  SEQUENTIAL OPENING OR CLOSING OF SERIAL PORTS IN SINGLE FLOW LINE (E.G., ANTI-SCORING)
211  DF  SERIAL ALTERNATELY CLOSED PORTS
212  DF  RELATIVELY MOVABLE VALVE ELEMENTS FORM SINGLE PORT CLOSURE (E.G., IRIS DIAPHRAGM)
213  DF  MECHANICAL MOVEMENT ACTUATOR
214  DF  .~ Particularly packed or sealed
215  DF  .~ Plural motions of valve
216  DF  .~.~ Screw threads in flow path
217  DF  .~.~ Valve head between actuator and screw
218  DF  .~.~ Encased
219  DF  .~.~.~ Threadlessly coupled to screw
220  DF  .~.~.~.~ Coupling socket in screw
221  DF  .~.~.~ Threads in removable sleeve
222  DF  .~.~.~.~ Sleeve removably in bonnet
223  DF  .~.~.~.~ Sleeve is bonnet
224  DF  .~.~.~.~ Sleeve flange mounted between body and bonnet
225  DF  .~.~ Threads in removable sleeve
226  DF  .~.~ Biased
227  DF  .~.~.~ Spring
228  DF  .~ With pivoted valves
229  DF  .~ Plural dissimilar mechanical movements
230  DF  .~ Ratchet
231  DF  .~ Lever
232  DF  .~.~ Train (plural serial)
233  DF  .~.~ Leverage variable during operation
234  DF  .~.~ Adjustable leverage
235  DF  .~.~ Swiveled
236  DF  .~.~ Biased
237  DF  .~.~.~ Sliding contact
238  DF  .~.~.~.~ Spring
239  DF  .~.~.~.~.~ Spring co-axial with valve arm
240  DF  .~.~.~.~.~.~ Spring stop on valve stem
241  DF  .~.~.~.~.~.~ Spring abuts valve stem guide
242  DF  .~.~.~ Spring
243  DF  .~.~.~.~ Co-acts with lever
244  DF  .~.~.~.~ Co-axial with valve stem
245  DF  .~.~.~.~.~ Spring stop on valve stem
246  DF  .~.~.~.~.~ Spring abuts valve stem guide
247  DF  .~.~.~ Weight
248  DF  .~ Gear
249  DF  .~.~ Mutilated or Geneva gearing
249.5  DF  .~.~ Worm type
250  DF  .~.~ Rectilinear rack
250.5  DF  .~.~ Mating segments
251  DF  .~ Cam
252  DF  .~.~ Co-axial or parallel axes
253  DF  .~.~.~ Biased
254  DF  .~.~.~.~ Bi-directional
255  DF  .~.~.~.~.~ Non-reciprocating
256  DF  .~.~.~.~ Encased
257  DF  .~.~ Encased with seal
258  DF  .~.~.~ Bi-directional
259  DF  .~.~.~ Cam is finger-like extension
260  DF  .~.~.~ Overhung crank type
261  DF  .~.~.~ Center crank type
262  DF  .~.~ Biased
263  DF  .~.~.~ Spring
264  DF  .~ Screw
265  DF  .~.~ Plural thread
266  DF  .~.~ Non-reciprocating actuator
267  DF  .~.~.~ Internal thread
268  DF  .~.~.~.~ Inverted cup-shape
269  DF  .~.~.~.~.~ Separable actuator bushing
270  DF  .~.~.~ Removable guide
271  DF  .~.~.~.~ Resiliently mounted actuator
272  DF  .~.~.~ Biased
273  DF  .~.~ Internal thread
274  DF  .~.~ Encased
275  DF  .~.~.~ Biased
276  DF  .~.~.~.~ Spring
277  DF  .~.~ Biased
278  DF  .~.~.~ Spring
279  DF  .~ Linkage
280  DF  .~.~ Toggle
281  DF  BALANCED VALVES
282  DF  .~ Reciprocating
283  DF  .~ Rotary
284  DF  LIMIT STOP
285  DF  .~ Adjustable
286  DF  .~ Rotary valve
287  DF  .~.~ Stop element on head
288  DF  .~.~ Stop element on actuator
289  DF  VALVE ACTUABLE FROM PLURAL POSITIONS
290  DF  PLURAL SELECTIVE NEUTRAL POSITIONS FOR VALVE OR ACTUATOR
291  DF  DETACHABLE ACTUATOR
292  DF  .~ Rotary valve
293  DF  EXTENSION FOR ACTUATOR
294  DF  FLEXIBLE ACTUATOR (E.G., BOWDEN WIRE; CHAIN)
295  DF  PEDAL ACTUATOR
296  DF  PLURAL MOTIONS OF ACTUATOR
297  DF  WITH FRICTION DETENT
298  DF  PIVOTED VALVES
299  DF  .~ Terminal
300  DF  .~.~ Gate
301  DF  .~ Gate
302  DF  .~.~ Bifaced
303  DF  .~ Biased
304  DF  ROTARY VALVES
305  DF  .~ Butterfly
306  DF  .~.~ Head and/or seat packing
307  DF  .~.~.~ Adjustable
308  DF  .~.~ Head and stem connections
309  DF  .~ Plug
310  DF  .~.~ Axial and radial bore
311  DF  .~.~.~ Lateral inlet and outlet
312  DF  .~.~ Retainer at actuator end
313  DF  .~ Biased
315.01  DF  .~ Ball valve
315.02  DF  .~.~ Having a particular hardness (i.e., durometric property)
315.03  DF  .~.~ Of specific material
315.04  DF  .~.~.~ Ceramic (e.g., glass or fired clay)
315.05  DF  .~.~.~ Nonmetallic
315.06  DF  .~.~ Having a swinging actuator
315.07  DF  .~.~ Eccentric seating
315.08  DF  .~.~ Including trunnion opposite axially extending actuating means
315.09  DF  .~.~.~ With removable trunnion cover
315.1  DF  .~.~ Housing construction
315.11  DF  .~.~.~ Head removable perpendicular to flow passage
315.12  DF  .~.~.~.~ At the actuator side (i.e., top entry)
315.13  DF  .~.~.~ Assembled around the head
315.14  DF  .~.~.~ Head removable along one side of flow passage
315.15  DF  .~.~.~ Having inseparable head
315.16  DF  .~.~ Ball construction
314  DF  .~ Seat or interface seal
316  DF  .~.~ Replaceable
317  DF  .~.~.~ Deformable material
317.01  DF  .~.~.~ Carried by head
318  DF  RECIPROCATING VALVE
319  DF  .~ Push or pull operator
320  DF  .~.~ Biased
321  DF  .~.~.~ Spring
322  DF  .~.~.~.~ Spring stop on valve stem
323  DF  .~.~.~.~ Spring abuts valve stem guide
324  DF  .~ Piston
325  DF  .~.~ With internal flow passage
326  DF  .~ Gate
327  DF  .~.~ Bifaced
328  DF  .~.~ Seats
329  DF  .~.~ Bodies
330  DF  .~ Actuator controlled stem seal
331  DF  .~ Diaphragm
332  DF  .~ Diverse material seal at valve interface
333  DF  .~ Particular head and seat cooperation
334  DF  .~.~ Elastic deformation
335.1  DF  HERMETIC FLEXIBLE WALL SEAL FOR ACTUATOR
335.2  DF  .~ Diaphragm
335.3  DF  .~ Bellows
336  DF  BIASED VALVE
337  DF  .~ Springs and spring retainers
338  DF  .~ Weight biased
339  DF  VALVE ACTUATOR EXTENDING THROUGH FLUID INLET OR OUTLET
340  DF  VALVE ACTUATOR SURROUNDING PIPE, INLET OR OUTLET
341  DF  VALVE ACTUATOR IS VALVE CASING OR EXTENSION THEREOF
342  DF  .~ Jointed or flexible wall
343  DF  .~ Sleeve valve
344  DF  .~.~ Flow passage in sleeve
345  DF  .~.~ Rotary
346  DF  .~ Plural motions of valve
347  DF  .~ Reciprocating valve
348  DF  .~ Biased valve
349  DF  VALVE ACTUATOR IS INLET OR OUTLET
350  DF  .~ Detachable tip
351  DF  .~ Plural motions of valve
352  DF  .~ Rotary
353  DF  .~ Reciprocating spout
354  DF  .~ Biased valve
355  DF  WITH ACTUATION LUBRICATING MEANS
356  DF  VALVE
357  DF  .~ Removable seat engaging element
358  DF  .~ Reinforced flexible material
359  DF  .~ Seats
360  DF  .~.~ Removable
361  DF  .~.~.~ Mounted between casing sections
362  DF  .~.~.~ Compression or tension retained
363  DF  .~.~.~ With seal
364  DF  .~.~ Head engaging gasket
365  DF  .~.~ Retained by seat deformation
366  DF  .~ Bodies
367  DF  .~.~ Sectional
368  DF  .~ Materials
369  DF  MISCELLANEOUS
******************************
CROSS-REFERENCE ART COLLECTIONS
******************************
900  DF  VALVES WITH O-RINGS
901  DF  CURTAIN TYPE VALVES
902  DF  SPRINGS EMPLOYED AS VALVES
903  DF  NEEDLE VALVES
904  DF  SNAP FIT PLUG VALVES
905  DF  MOVABLE COIL ELECTRICAL ACTUATOR (E.G., VOICE COIL)