| Class Number |
Class Name |
No. of Patents |
| 310/10 |
Dynamoelectric |
114 |
| 310/11 |
Conducting fluid |
209 |
| 310/12 |
Linear |
1432 |
| 310/13 |
Fixed and movable wound elements |
446 |
| 310/14 |
Solenoid and core type |
246 |
| 310/36 |
Oscillating |
299 |
| 310/38 |
Direct-connected |
32 |
| 310/39 |
With interrupter |
20 |
| 310/37 |
With motion-converting mechanism |
58 |
| 310/15 |
Reciprocating |
422 |
| 310/28 |
Direct-connected |
9 |
| 310/29 |
Pivoted or flat-spring armature |
66 |
| 310/30 |
Solenoid and core |
143 |
| 310/27 |
Fixed and movable wound elements |
123 |
| 310/26 |
Magnetostrictive |
235 |
| 310/25 |
Reed type |
41 |
| 310/31 |
Self-actuated interrupter |
6 |
| 310/32 |
Pivoted or flat-spring armature |
15 |
| 310/33 |
Plural armatures |
8 |
| 310/34 |
Solenoid and core |
39 |
| 310/35 |
Successively energized solenoid coils |
37 |
| 310/16 |
With cooling or temperature modification |
42 |
| 310/17 |
With other elements |
147 |
| 310/20 |
Motion-converting mechanism |
109 |
| 310/21 |
Pivoted or flat-spring armature |
28 |
| 310/22 |
Plural armatures |
29 |
| 310/23 |
Solenoid and core type |
81 |
| 310/24 |
Plural cores |
61 |
| 310/19 |
Speed control or time delay |
12 |
| 310/40R |
Rotary |
76 |
| 310/159 |
A.c. |
16 |
| 310/173 |
Commutated |
8 |
| 310/174 |
Single phase |
3 |
| 310/175 |
Conduction operation |
1 |
| 310/176 |
Transformer operation |
7 |
| 310/160 |
Frequency converters |
23 |
| 310/166 |
Induction |
221 |
| 310/171 |
Induction generators |
66 |
| 310/168 |
Inductor-type generators (variable reluctance) |
422 |
| 310/169 |
High frequency |
4 |
| 310/170 |
Multifrequency |
5 |
| 310/172 |
Shifting field (e.g., shading pole) |
48 |
| 310/167 |
With repulsion-starting |
4 |
| 310/161 |
Phase-shifter type |
8 |
| 310/162 |
Synchronous |
263 |
| 310/165 |
D.c. excited |
43 |
| 310/163 |
Reaction type |
45 |
| 310/164 |
Toroidal coil |
116 |
| 310/52 |
Cooling or fluid contact |
579 |
| 310/58 |
Circulation |
569 |
| 310/64 |
Heat-exchange structure |
552 |
| 310/65 |
Spacers (e.g., laminae, coils, etc.) |
105 |
| 310/59 |
Plural units or plural paths |
360 |
| 310/60R |
Self-forced |
101 |
| 310/60A |
Hollow passages |
143 |
| 310/63 |
Pressure pump or fan |
257 |
| 310/61 |
Rotor passage |
311 |
| 310/62 |
Suction pump or fan |
363 |
| 310/57 |
Intermediate confined coolant |
86 |
| 310/54 |
Liquid coolant |
476 |
| 310/55 |
Nonatmospheric gas |
66 |
| 310/53 |
With control means |
92 |
| 310/56 |
With gas purification or treating |
38 |
| 310/219 |
Current collectors |
126 |
| 310/229 |
Brush-traversing |
26 |
| 310/230 |
Circumferential brush shifting on reversal |
16 |
| 310/238 |
Fixed structure |
54 |
| 310/239 |
Brush holders or rigging |
590 |
| 310/244 |
Brush affixed to pivoted arm |
49 |
| 310/242 |
Brush engagements or guides |
259 |
| 310/240 |
Brush-lifting |
34 |
| 310/241 |
Circumferential adjustment |
41 |
| 310/243 |
Fluid pressure-operated |
5 |
| 310/245 |
Slidable brush |
141 |
| 310/247 |
Axial spring |
60 |
| 310/246 |
Pressure arm |
44 |
| 310/248 |
Brushes |
195 |
| 310/251 |
Structure (e.g., composite material) |
83 |
| 310/252 |
With composition feature |
45 |
| 310/253 |
Carbonaceous |
36 |
| 310/249 |
With electrical connector |
134 |
| 310/231 |
Rotary structure |
33 |
| 310/233 |
Commutators |
263 |
| 310/236 |
Cylindrical or drum |
104 |
| 310/237 |
Disc |
154 |
| 310/235 |
Molded support |
131 |
| 310/234 |
Winding connectors |
153 |
| 310/232 |
Slip rings |
154 |
| 310/220 |
Spark-reduction |
70 |
| 310/221 |
Arc extinguishers |
17 |
| 310/223 |
Flux compensators |
9 |
| 310/224 |
Commutating poles or windings |
15 |
| 310/226 |
Field-distortion |
0 |
| 310/225 |
Short-circuited coil circuit |
14 |
| 310/222 |
Spark-neutralizing current |
7 |
| 310/228 |
With cleaning, lubricating, resurfacing or repairing |
27 |
| 310/227 |
With cooling |
46 |
| 310/177 |
D.c. |
37 |
| 310/178 |
Homopolar |
156 |
| 310/272 |
Elements |
4 |
| 310/111 |
Generated wave-form modification |
42 |
| 310/45 |
Impregnated or coated |
393 |
| 310/46 |
Magnetic motors |
138 |
| 310/47 |
Portable or hand tool (e.g., dry shavers) |
85 |
| 310/49R |
Step-by-step |
736 |
| 310/49A |
Claw-tooth and printed circuit components |
26 |
| 310/48 |
With other elements |
12 |
| 310/40MM |
Miniature motors |
407 |
| 310/273 |
Miscellaneous |
18 |
| 310/43 |
Molded plastic |
770 |
| 310/152 |
Permanent magnet machines |
139 |
| 310/153 |
Inbuilt with flywheel (magneto) |
128 |
| 310/156.01 |
Permanent magnet rotor |
162 |
| 310/156.07 |
Additional flux directing magnets |
17 |
| 310/156.66 |
Claw poles/interfitting poles/lundel |
35 |
| 310/156.73 |
Additional support for claw pole tips |
4 |
| 310/156.72 |
Additional support for magnet |
22 |
| 310/156.71 |
Claw poles extend in the same axial direction |
6 |
| 310/156.67 |
Laminated pole shoes |
0 |
| 310/156.69 |
Plural sets of claw poles |
8 |
| 310/156.68 |
Poles formed by magnet |
3 |
| 310/156.06 |
Combined with flux for sensing |
26 |
| 310/156.74 |
Damping features |
10 |
| 310/156.77 |
Damper cage around magnet |
4 |
| 310/156.76 |
Damper in pole pieces |
1 |
| 310/156.75 |
Damper plate on magnetic face |
3 |
| 310/156.32 |
Including an axial air gap |
159 |
| 310/156.34 |
With a stator between a rotating flux return plate and rotor magnet |
27 |
| 310/156.36 |
With plural sets of rotating magnets |
51 |
| 310/156.37 |
With single stator and plural sets of rotating magnets |
41 |
| 310/156.33 |
With pole shoes |
9 |
| 310/156.35 |
With single rotor magnet and plural stators |
42 |
| 310/156.08 |
Mounting (such as on a surface of a shaft) |
111 |
| 310/156.25 |
Axially offset and radially magnetized magnets |
56 |
| 310/156.31 |
Banding around magnet |
25 |
| 310/156.24 |
Including a spring mount to adjust a flux |
2 |
| 310/156.27 |
Including thermal compensation |
9 |
| 310/156.09 |
Keyed to shaft |
15 |
| 310/156.11 |
Magnets in shaft |
33 |
| 310/156.26 |
Mounted on a bell shape hub |
146 |
| 310/156.12 |
Mounted on a sleeve/hub |
139 |
| 310/156.15 |
Induced flux pole on sleeve/hub |
16 |
| 310/156.13 |
Keyed to a sleeve/hub |
29 |
| 310/156.14 |
Knurl between the sleeve/hub and a shaft |
9 |
| 310/156.28 |
Sleeve covering magnet face |
120 |
| 310/156.29 |
Sleeve parallel to magnetic face |
23 |
| 310/156.16 |
Spring mounted |
16 |
| 310/156.17 |
Spring mounted flux shunt |
2 |
| 310/156.18 |
With a threaded fastener |
22 |
| 310/156.19 |
With a wedge |
51 |
| 310/156.21 |
With an adhesive |
76 |
| 310/156.22 |
With an axial end clamp |
57 |
| 310/156.23 |
With casting material around the magnet |
31 |
| 310/156.48 |
Pole shoes/pole pieces |
32 |
| 310/156.64 |
Axially magnetized with pole shoes at both ends |
36 |
| 310/156.65 |
Laminated pole shoes |
7 |
| 310/156.62 |
Axially magnetized with poles shoes at one end |
4 |
| 310/156.63 |
Laminated pole shoes |
0 |
| 310/156.55 |
Circumferential flux path and circumferential pole shoes |
63 |
| 310/156.58 |
Different size pole shoes |
2 |
| 310/156.56 |
Embedded |
122 |
| 310/156.59 |
Pole shoes fixed to hub or shaft |
18 |
| 310/156.61 |
Pole shoes fixed with end plates |
19 |
| 310/156.57 |
With slots or holes to guide flux |
65 |
| 310/156.49 |
Radial flux path and radially positioned pole shoes |
34 |
| 310/156.53 |
Embedded in a core |
213 |
| 310/156.54 |
Induced flux return poles |
22 |
| 310/156.51 |
Laminated pole shoes with multiple pole pairs |
13 |
| 310/156.52 |
Laminated pole shoes with single pole pair |
7 |
| 310/156.05 |
Separate portion of the rotor magnet used as a magnet for sensing (i.e., for position or frequency) |
78 |
| 310/156.04 |
Separate portion of the rotor magnet used as a thrust bearing |
21 |
| 310/156.38 |
Specific shape |
138 |
| 310/156.39 |
Horseshoe |
9 |
| 310/156.43 |
Specific magnetization |
111 |
| 310/156.44 |
Different pole width |
14 |
| 310/156.46 |
Shaped to vary air |
43 |
| 310/156.47 |
Skewed |
64 |
| 310/156.45 |
Specific dimensions |
104 |
| 310/156.42 |
Star |
5 |
| 310/156.41 |
Triangular |
13 |
| 310/156.78 |
Squirrel cage |
32 |
| 310/156.82 |
Axially magnetized magnets or axially positioned magnets |
7 |
| 310/156.83 |
Including a flux barrier |
11 |
| 310/156.84 |
Flux barrier is a magnet |
6 |
| 310/156.79 |
Including laminated ring |
4 |
| 310/156.81 |
Magnet positioned between squirrel cage and stator |
9 |
| 310/156.02 |
Transverse flux |
32 |
| 310/156.03 |
With a hysteresis ring |
8 |
| 310/154.01 |
Permanent magnet stator |
59 |
| 310/154.43 |
Additional permanent magnets |
18 |
| 310/154.44 |
Additional shield or coating (non-magnetic) |
2 |
| 310/154.02 |
Combined with generating coil |
24 |
| 310/155 |
Inductor type |
82 |
| 310/154.03 |
Means for securing magnet |
25 |
| 310/154.07 |
Adhesive |
28 |
| 310/154.16 |
Axially pressing on magnets |
20 |
| 310/154.05 |
Axial |
34 |
| 310/154.06 |
Plural sets of magnets |
24 |
| 310/154.04 |
Cantilevered |
23 |
| 310/154.12 |
Cylindrical sleeve holder |
20 |
| 310/154.11 |
Embedded in core or pole |
20 |
| 310/154.13 |
Holder with pocket for magnet |
10 |
| 310/154.08 |
Mounted to magnet yoke |
36 |
| 310/154.09 |
Split housing/yoke |
11 |
| 310/154.14 |
Spring clip |
29 |
| 310/154.15 |
Clip secured to housing |
22 |
| 310/154.17 |
Wedging between |
26 |
| 310/154.18 |
With a magnetic wedge |
6 |
| 310/154.19 |
With an integral wedge |
5 |
| 310/154.45 |
Multiple pole pairs |
5 |
| 310/154.49 |
Adjustable |
0 |
| 310/154.48 |
Induce flux return pole |
3 |
| 310/154.47 |
Magnet extending between two poles |
4 |
| 310/154.46 |
With specific pole shoe pieces |
6 |
| 310/154.21 |
Permanent magnet characterized by the shape of the magnet |
41 |
| 310/154.24 |
Bar, square or rectangular |
7 |
| 310/154.25 |
Disk, ring, or cylinder |
24 |
| 310/154.23 |
Horseshoe |
3 |
| 310/154.22 |
With specific dimension |
27 |
| 310/154.31 |
Single pole pair |
2 |
| 310/154.42 |
Induced flux return pole |
1 |
| 310/154.32 |
Permanent magnet extends along an axis |
2 |
| 310/154.33 |
Plural rotors |
4 |
| 310/154.34 |
With adjustable magnetic structure |
3 |
| 310/154.35 |
With specific pole pieces or pole shoes |
4 |
| 310/154.36 |
Circumferentially spaced poles and magnets |
5 |
| 310/154.39 |
Different size |
0 |
| 310/154.41 |
Laminated |
2 |
| 310/154.38 |
Pole shoe shape |
2 |
| 310/154.37 |
Poles extending axially from magnets |
0 |
| 310/154.28 |
Specific magnetization |
37 |
| 310/154.29 |
Specific position or shape |
23 |
| 310/154.26 |
With means to prevent or reduce demagnetization (i.e., auxiliary magnetic poles) |
30 |
| 310/154.27 |
With an auxiliary pole extending between stator magnet and rotor |
5 |
| 310/127 |
Plural collector-type machines |
12 |
| 310/128 |
Commutator and slip-ring type |
17 |
| 310/133 |
Common armature winding |
2 |
| 310/134 |
With plural field windings |
2 |
| 310/135 |
Commutator in field circuit |
6 |
| 310/131 |
Different armature circuits |
2 |
| 310/132 |
Polyphase armature winding |
1 |
| 310/129 |
Synchronous or rotary converter |
10 |
| 310/130 |
For plural wire d.c. system |
3 |
| 310/136 |
Plural commutator type |
18 |
| 310/137 |
Double current d. c. machines |
0 |
| 310/138 |
Dynamotor type |
11 |
| 310/139 |
Hetero-axial excitation |
1 |
| 310/140 |
Plural armature windings |
3 |
| 310/141 |
Plural field windings |
2 |
| 310/142 |
Plural field windings |
2 |
| 310/148 |
Plural sets of brushes |
35 |
| 310/149 |
Plural field windings |
11 |
| 310/150 |
Polyphase arrangement |
2 |
| 310/151 |
Short circuiting conductor between brushes |
9 |
| 310/143 |
Plural slip-ring sets |
8 |
| 310/144 |
Plural armature windings |
3 |
| 310/145 |
Plural sets of poles |
1 |
| 310/146 |
Polyphase windings |
0 |
| 310/147 |
Slip rings in field circuit |
3 |
| 310/114 |
Plural rotary elements |
457 |
| 310/115 |
Field and armature both rotate |
47 |
| 310/116 |
Limited movement |
32 |
| 310/117 |
Mechanical bias |
9 |
| 310/118 |
With interconnecting drive mechanism |
33 |
| 310/119 |
Fluid-drive mechanism |
11 |
| 310/120 |
Friction-drive mechanism |
2 |
| 310/121 |
Mechanically controlled element |
8 |
| 310/122 |
By additional dynamoelectric machine |
5 |
| 310/123 |
Friction brake |
1 |
| 310/126 |
Plural armatures in common field |
25 |
| 310/124 |
Plural short-circuited rotary elements |
7 |
| 310/125 |
Squirrel cage type |
20 |
| 310/112 |
Plural units, structurally united |
469 |
| 310/113 |
Motor-generator sets |
171 |
| 310/50 |
Portable or hand tool |
314 |
| 310/44 |
Powdered metal |
111 |
| 310/261 |
Rotor structure |
1009 |
| 310/264 |
Armatures |
70 |
| 310/268 |
Disc |
708 |
| 310/265 |
Drum |
49 |
| 310/266 |
Hollow (e.g., double air gap) |
337 |
| 310/267 |
Ring |
53 |
| 310/269 |
Salient pole |
204 |
| 310/271 |
Banding |
91 |
| 310/270 |
End turn supports |
206 |
| 310/262 |
High-speed rotor type |
90 |
| 310/263 |
Interfitting or claw tooth rotors |
347 |
| 310/40.5 |
Self-nutating or moving (e.g., oscillating fan, etc.) |
7 |
| 310/254 |
Stator structure |
1234 |
| 310/255 |
For railway-type machines |
7 |
| 310/258 |
Frame and core type |
345 |
| 310/259 |
Core assembly |
348 |
| 310/260 |
End turn supports |
287 |
| 310/257 |
Interfitting or claw-tooth stators |
203 |
| 310/256 |
Stray field flux loss prevention |
80 |
| 310/92 |
Torque-transmitting clutches or brakes |
105 |
| 310/94 |
Automatic control |
10 |
| 310/95 |
By speed |
19 |
| 310/93 |
Brake type |
153 |
| 310/102R |
Generator-motor type |
19 |
| 310/102A |
Homopolar clutches |
2 |
| 310/103 |
Magnetic field type |
257 |
| 310/105 |
Induced or eddy current type |
187 |
| 310/106 |
Magnetic reluctance feature |
19 |
| 310/107 |
With collection means for induced current |
1 |
| 310/108 |
Delivery to external device |
5 |
| 310/109 |
Electric motor |
3 |
| 310/110 |
Impedance |
2 |
| 310/104 |
With air-gap shield |
80 |
| 310/101 |
Plural units |
10 |
| 310/96 |
With other drive mechanism |
23 |
| 310/98 |
Drive motor |
32 |
| 310/99 |
Gearing |
54 |
| 310/100 |
Mechanical clutch |
26 |
| 310/97 |
Output bias or resistance device |
6 |
| 310/158 |
Universal (a.c. or d.c.) |
17 |
| 310/157 |
Vertically disposed |
67 |
| 310/51 |
Vibration or noise suppression |
716 |
| 310/179 |
Windings and core structure |
640 |
| 310/213 |
Antiparasitic conductors (imbricated) |
43 |
| 310/195 |
Armature or primary |
58 |
| 310/209 |
Adjustable magnetic structure |
76 |
| 310/201 |
Bar windings |
258 |
| 310/203 |
Closed windings |
37 |
| 310/204 |
Equalizers |
22 |
| 310/206 |
Lap |
61 |
| 310/205 |
Multiplex |
9 |
| 310/207 |
Wave |
95 |
| 310/208 |
Coils |
371 |
| 310/196 |
Corona-prevention |
50 |
| 310/202 |
Open windings |
13 |
| 310/198 |
Plural windings |
320 |
| 310/199 |
Combined stationary and rotary |
5 |
| 310/200 |
Variable length or tapped windings |
22 |
| 310/197 |
With short-circuited winding or conductor |
35 |
| 310/214 |
Coil retainers or slot closers |
365 |
| 310/216 |
Core features |
1035 |
| 310/218 |
Pole assembly and securing means |
337 |
| 310/217 |
Securing laminae |
414 |
| 310/180 |
Field or excitation windings or structure |
375 |
| 310/191 |
Adjustable magnetic structure |
126 |
| 310/194 |
Coil supports and spools |
298 |
| 310/181 |
Combined permanent and electromagnet |
259 |
| 310/190 |
Magnetic shunts for shifting field flux |
76 |
| 310/192 |
Nonmagnetic inserts or air gaps |
28 |
| 310/193 |
Nonuniform core cross section |
57 |
| 310/184 |
Plural field windings |
497 |
| 310/188 |
Differentially related |
10 |
| 310/186 |
Interpole, compensating or neutralizing poles |
82 |
| 310/185 |
Plural sets of poles |
98 |
| 310/187 |
Slotted or divided pole |
57 |
| 310/189 |
Variable length or tapped winding |
15 |
| 310/182 |
With short-circuited winding or conductor |
23 |
| 310/183 |
Damper winding |
29 |
| 310/210 |
Secondary windings or conductors |
15 |
| 310/211 |
Squirrel cage |
204 |
| 310/212 |
Inherently variable impedance (double squirrel cage) |
30 |
| 310/215 |
Slot liners |
220 |
| 310/42 |
With assembling, metal casting or machining feature |
1156 |
| 310/41 |
With mechanical starters |
53 |
| 310/66 |
With other elements |
75 |
| 310/90 |
Bearing or air-gap adjustment or bearing lubrication |
1411 |
| 310/90.5 |
Magnetic bearing |
1023 |
| 310/75R |
Drive mechanism |
237 |
| 310/76 |
Brake and clutch |
35 |
| 310/77 |
Brake |
179 |
| 310/78 |
Clutch |
132 |
| 310/75D |
Flexible shaft or coupling and hollow shaft drive |
94 |
| 310/75B |
Hand- or foot-operated |
28 |
| 310/80 |
Motion conversion |
290 |
| 310/83 |
Gearing |
441 |
| 310/84 |
Impulse coupling |
15 |
| 310/82 |
Swash plate |
67 |
| 310/81 |
Unbalanced weight (e.g., vibrators) |
251 |
| 310/75C |
Rim drive (e.g., bicycle generator drive by wheel, rim, or tire) |
62 |
| 310/79 |
Shaft and armature timing or phasing connection |
8 |
| 310/75A |
Spring or gravity drive |
28 |
| 310/68R |
Electric circuit elements |
719 |
| 310/68B |
Condition responsive (e.g., position, torque, etc.) |
621 |
| 310/71 |
Connectors, terminals or lead-ins |
1374 |
| 310/68D |
Conversion elements, (e.g., transformers, rectifiers, etc.) |
426 |
| 310/73 |
Illuminating devices |
26 |
| 310/72 |
Impedance devices |
106 |
| 310/68A |
Manually operable (e.g., switches, rheostats, etc.) |
65 |
| 310/68E |
Motion responsive (e.g., centrifugal switches) |
101 |
| 310/69 |
Shaft-driven switch (e.g., blasting generators) |
9 |
| 310/70R |
Distributor or timer (e.g., ignition magnetos) |
52 |
| 310/70A |
Ignition systems |
42 |
| 310/68C |
Temperature, current-responsive, i.e., protectors |
230 |
| 310/67R |
Inbuilt or incorporated unit |
1075 |
| 310/67A |
Bicycle-hub generators |
72 |
| 310/74 |
Inertia or fly-wheel device |
267 |
| 310/85 |
Mechanical shields or protectors |
97 |
| 310/88 |
Dirt, moisture or explosion proof |
265 |
| 310/89 |
Housings, windows or covers |
1422 |
| 310/86 |
Shield in air gap |
101 |
| 310/87 |
Submersible |
279 |
| 310/91 |
Supports |
855 |
| 310/1 |
Educational or construction units or kits |
14 |
| 310/DIG.3 |
Hall effect generators and converters |
40 |
| 310/DIG.2 |
Hysteresis rotors and motors |
6 |
| 310/300 |
Non-dynamoelectric |
58 |
| 310/308 |
Charge accumulating |
66 |
| 310/309 |
Electrostatic |
534 |
| 310/310 |
Friction |
22 |
| 310/301 |
Nuclear reaction |
15 |
| 310/302 |
Contact potential difference |
11 |
| 310/305 |
Direct charge particle emission |
18 |
| 310/303 |
P-n semiconductor |
42 |
| 310/304 |
Secondary electron emission |
16 |
| 310/311 |
Piezoelectric elements and devices |
545 |
| 310/312 |
Adding or subtracting mass |
258 |
| 310/326 |
Combined with damping structure |
263 |
| 310/327 |
On back of piezoelectric element |
181 |
| 310/321 |
Combined with resonant structure |
404 |
| 310/322 |
Acoustic wave type generator or receiver |
321 |
| 310/324 |
Diaphragm |
548 |
| 310/323.01 |
Direct mechanical coupling |
186 |
| 310/323.21 |
Detector (e.g., sensor) |
114 |
| 310/323.18 |
Device performs work on an object (e.g., welding, cutting) |
53 |
| 310/323.19 |
Horn or transmission line |
69 |
| 310/323.02 |
Motor producing continual motion |
279 |
| 310/323.16 |
Eliptical motion at fixed point (i.e., walking) or ratchet and pawl motor |
97 |
| 310/323.12 |
Langevin or pencil type motor |
76 |
| 310/323.13 |
Output member detail |
34 |
| 310/323.15 |
Material or material property |
12 |
| 310/323.14 |
Roller or ball element |
12 |
| 310/323.03 |
Traveling wave motor |
94 |
| 310/323.08 |
Armature |
37 |
| 310/323.09 |
Pressing means detail |
47 |
| 310/323.11 |
Specific material or composition |
45 |
| 310/323.04 |
Stator |
76 |
| 310/323.07 |
Oval track |
16 |
| 310/323.06 |
Piezoelectric element or electrode |
73 |
| 310/323.05 |
Support |
36 |
| 310/323.17 |
Positions an object |
119 |
| 310/325 |
Sandwich or langevin type |
178 |
| 310/314 |
Electrical systems |
61 |
| 310/319 |
Electrical output circuit |
262 |
| 310/318 |
Input circuit for electrical output from piezoelectric element |
209 |
| 310/317 |
Input circuit for mechanical output from piezoelectric element |
714 |
| 310/316.01 |
Input circuit for simultaneous electrical and mechanical output from piezoelectric element |
525 |
| 310/316.03 |
Charging and discharging |
104 |
| 310/316.02 |
Traveling wave motor |
189 |
| 310/315 |
Temperature compensation circuits |
112 |
| 310/365 |
Electrode arrangement |
408 |
| 310/366 |
More than two |
891 |
| 310/363 |
Electrode materials |
235 |
| 310/364 |
Multilayer |
272 |
| 310/340 |
Encapsulated or coated |
265 |
| 310/357 |
Orientation of piezoelectric polarization |
162 |
| 310/358 |
Ceramic composition (e.g., barium titanate) |
433 |
| 310/359 |
More than one poling direction (e.g., rosen transformer) |
254 |
| 310/367 |
Piezoelectric element shape |
308 |
| 310/370 |
"u" or "tuning fork" shape |
232 |
| 310/369 |
Circular disc, ring, or cylinder |
322 |
| 310/368 |
Rectangular plate |
184 |
| 310/371 |
Sphere or hemisphere |
33 |
| 310/320 |
Piezoelectric slab having different resonant frequencies at different areas |
304 |
| 310/360 |
Rotation of crystal axis (e.g., cut angle) |
138 |
| 310/361 |
Quartz |
172 |
| 310/362 |
Rochelle salt |
2 |
| 310/345 |
Supported by elastic material |
132 |
| 310/313R |
Surface acoustic wave devices |
1005 |
| 310/313B |
Interdigitated electrodes |
741 |
| 310/313C |
Envelope or apodized |
167 |
| 310/313D |
Grating or reflector in wave path |
571 |
| 310/313A |
Orientation of piezoelectric material |
395 |
| 310/328 |
With mechanical energy coupling means |
1688 |
| 310/334 |
Acoustic wave type generator or receiver |
862 |
| 310/336 |
Nondestructive testing type |
184 |
| 310/337 |
Underwater type |
304 |
| 310/335 |
With lens or reflector |
259 |
| 310/330 |
Bending type |
483 |
| 310/331 |
Plural elements |
352 |
| 310/332 |
Multimorph |
318 |
| 310/338 |
Force or pressure measuring type |
347 |
| 310/329 |
Including inertia type operator |
271 |
| 310/333 |
Shear or torsional type |
169 |
| 310/339 |
Voltage, spark or current generator |
345 |
| 310/348 |
With mounting or support means |
691 |
| 310/349 |
Air gap |
59 |
| 310/350 |
Adjustable |
6 |
| 310/354 |
Clamped |
58 |
| 310/355 |
Spring bias |
45 |
| 310/356 |
90 degrees to major surface and margin clamped only |
12 |
| 310/351 |
Suspended by thin member |
69 |
| 310/353 |
Contact at edges only |
90 |
| 310/352 |
Point contact on major surfce only |
44 |
| 310/346 |
With temperature compensating structure |
226 |
| 310/347 |
Compensated air gap |
6 |
| 310/341 |
With temperature modifier and/or gas or vapor atmosphere control |
41 |
| 310/342 |
For plural piezoelectric elements |
25 |
| 310/344 |
Sealed unit |
316 |
| 310/343 |
With heating element |
42 |
| 310/306 |
Thermal or pyromagnetic |
223 |
| 310/307 |
With heat actuated bimetal element |
99 |
| 310/800 |
Piezoelectric polymers (e.g., mylar, pvdf) |
419 |
| 310/DIG.6 |
Printed-circuit motors and components |
183 |
