Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Communications
Class Information
Number: 367/167
Name: Communications, electrical: acoustic wave systems and devices > Signal transducers > Underwater type > Piezoelectric > Pressure compensating means
Description: Subject matter wherein means is provided to counteract the effects on the transducer of the static pressure of the surrounding water.










Patents under this class:

Patent Number Title Of Patent Date Issued
8644115 Hydrophone and pressure balancing device for using for hydrophone Feb. 4, 2014
7570543 Normally closed pressure-sensitive hydrophone switch Aug. 4, 2009
7393331 Vortex bubble-removing and cooling system for the electromagnetic shock wave generator for the lithotripter Jul. 1, 2008
7136324 Pressure equalizing fluidborne sound projector Nov. 14, 2006
6754136 Hydrophone with automatic inhibition in case an adjustable immersion threshold is exceeded Jun. 22, 2004
6418792 Pressure compensated transducer Jul. 16, 2002
6275448 Pressure-compensated acceleration-insensitive hydrophone Aug. 14, 2001
5828761 Sound amplification system having a submersible microphone Oct. 27, 1998
5784341 Underwater acoustic transmitter for large submersion Jul. 21, 1998
5768216 Flexitensional transducer having a strain compensator Jun. 16, 1998
5751659 Ceramic mass loaded longitudinal vibrator May. 12, 1998
5742561 Transversely driven piston transducer Apr. 21, 1998
5579287 Process and transducer for emitting wide band and low frequency acoustic waves in unlimited immersion depths Nov. 26, 1996
5431058 Flexural strain gauge acoustic transducer for deep submersion Jul. 11, 1995
5361240 Acoustic sensor Nov. 1, 1994
5349568 Leak locating microphone, method and system for locating fluid leaks in pipes Sep. 20, 1994
5345428 Flextensional transducers Sep. 6, 1994
5301170 Ultrasonic sensor mounting device Apr. 5, 1994
5222050 Water-resistant transducer housing with hydrophobic vent Jun. 22, 1993
5172344 Deep submergence transducer Dec. 15, 1992
5155709 Electro-acoustic transducers Oct. 13, 1992
5140560 Pressure compensated transducer system with constrained diaphragm Aug. 18, 1992
5043953 Pressure compensation device for an immersed volume of gas, in particular for an underwater electroacoustic transducer Aug. 27, 1991
5016228 Sonar transducers May. 14, 1991
4996675 Signal sensor insensitive to static pressure variations Feb. 26, 1991
4991153 Vibration type transducer Feb. 5, 1991
4964091 Electroacoustic transducer Oct. 16, 1990
4951698 Process and devices for maintaining the gas contained in a submerged enclosure in pressure equilibrium with the outside Aug. 28, 1990
4926397 Depth alarm for a seismic sensor May. 15, 1990
4858206 Ring-shell projector Aug. 15, 1989
4821244 Tubular acoustic projector Apr. 11, 1989
4803671 Sensor for acoustic shockwave pulses Feb. 7, 1989
H391 Piezoelectric polymer hydrophone Dec. 1, 1987
4704709 Transducer assembly with explosive shock protection Nov. 3, 1987
4674074 Saturated vapor pressure release mechanism Jun. 16, 1987
4637000 Depth transducer protective assembly Jan. 13, 1987
4531468 Temperature/pressure compensation structure Jul. 30, 1985
4524693 Underwater transducer with depth compensation Jun. 25, 1985
4450544 Absorptive sonar baffle May. 22, 1984
4420826 Stress relief for flextensional transducer Dec. 13, 1983
4393373 Piezoelectric audible sound generator Jul. 12, 1983
4364117 Shock-hardened, high pressure ceramic sonar transducer Dec. 14, 1982
4277839 Transducer array release and pressure compensation system Jul. 7, 1981
4151437 Piezoelectric transducers and acoustic antennas which can be immersed to a great depth Apr. 24, 1979
4074224 Acoustic wave transducer with automatic compensation of the static pressure variations Feb. 14, 1978
4031502 Hydrophone with acoustic reflector Jun. 21, 1977
4013992 Diver's piezoelectric microphone with integral AGC preamplifier Mar. 22, 1977
3992694 Transducer with half-section active element Nov. 16, 1976
3974474 Underwater electroacoustic transducer construction Aug. 10, 1976
3972018 Electromechanical transducer Jul. 27, 1976











 
 
  Recently Added Patents
Positive electrode active material for nonaqueous electrolyte secondary battery
Method for detecting motion of an electrical device or apparatus
Analyte assaying by means of immunochromatography with lateral migration
Management of temporal data by means of a canonical schema
Method for determining the local position of at least one mobile radio communication device based on predetermined local positions of adjacent radio communication devices, associated radio com
Digital signal processing apparatus, liquid crystal display apparatus, digital signal processing method and computer program
Methods and systems for providing a business repository
  Randomly Featured Patents
Press mechanism, clamp mechanism, and molding machine using this clamp mechanism
Self-pressurized container having a convoluted liner and an elastomeric sleeve
Hearing aid algorithms
Illuminated carrier
Cowling air inlet for outboard motor
Electrical connector assembly
Dental implant, a template for inserting a dental implant, and a process for producing them
Push button air primer for carburetor
Amyloid imaging as a surrogate marker for efficacy of anti-amyloid therapies
Drain trough mounting apparatus and method of manufacturing same