B
SECTION B — PERFORMING OPERATIONS; TRANSPORTING
  
SEPARATING; MIXING
 B06
GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
 B06B
METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC OR ULTRASONIC FREQUENCY FOR PERFORMING MECHANICAL WORK IN GENERAL (for particular applications, see the relevant subclasses, e.g. B07B 1/40, B23Q 17/12, B24B 31/06; measurement of mechanical vibrations or ultrasonic, sonic or infrasonic waves G01H; in direction finding, locating, distance or velocity measuring G01S; control of mechanical vibrations in general G05D; sound-producing devices, e.g. bells sirens, whistles, G10K; generation of electrical oscillations H03B; electromechanical resonators in general H03H; electromechanical transducers H04R)  [2]
 B06B 1/00
Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
 B06B 1/02
·  making use of electrical energy (B06B 1/18, B06B 1/20 take precedence)
 B06B 1/04
·  ·  operating with electromagnetism (dynamo-electric motors with vibrating magnet, armature or coil system H02K 33/00)
 B06B 1/06
·  ·  operating with piezo-electric effect or with electrostriction (piezo-electric or electrostrictive devices per se H01L 41/00)
 B06B 1/08
·  ·  operating with magnetostriction (magnetostrictive devices per se H01L 41/00)
 B06B 1/10
·  making use of mechanical energy (B06B 1/18, B06B 1/20 take precedence)
 B06B 1/12
·  ·  operating with systems involving reciprocating masses
 B06B 1/14
·  ·  ·  the masses being elastically coupled
 B06B 1/16
·  ·  operating with systems involving rotary unbalanced masses
 B06B 1/18
·  wherein the vibrator is actuated by pressure fluid (B06B 1/20 takes precedence)
 B06B 1/20
·  making use of a vibrating fluid
 B06B 3/00
Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
 B06B 3/02
·  involving a change of amplitude
 B06B 3/04
·  involving focusing or reflecting