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| Number | Title | Issue Date |
| 7608984 | Motion amplification using piezoelectric element A motion amplifier (22) comprises piezoelectric diaphragm (30) and drive electronics (26) for applying a drive signal to the piezoelectric diaphragm. The motion amplifier preferably comprises (in addition to the piezoelectric diaphragm) a reacti... | 10/27/2009 |
| 7549460 | Thermal transfer devices with fluid-porous thermally conductive core A thermal transfer device (20) comprises a housing having a base assembly (23) and a cover (22). The base assembly (23) comprises a thermal transfer base (25) and a fluid-porous, thermally conductive mesh structure (26). The... | 06/23/2009 |
| 7409902 | Actuators with connected diaphragms An actuator assembly comprises a first diaphragm (422) and a second diaphragm (424) connected to the first diaphragm for forming a chamber (426) between the first diaphragm and the second diaphragm. An actuator shaft (427) is connected to... | 08/12/2008 |
| 7345407 | Human powered piezoelectric power generating device An energy scavenging apparatus comprises a frame which can be human-carried or human-borne; plural cantilevered bimorph piezoelectric members connected to the frame to have an essentially parallel orientation, each cantilevered bimorph piezoelectric member comprisin... | 03/18/2008 |
| 7322803 | Pumps with diaphragms bonded as bellows A pump comprises a diaphragm assembly which includes a first diaphragm (22) having a first diaphragm edge (28) and a second diaphragm (24) having a second diaphragm edge (30). The first diaphragm edge (28) and the second diaphragm ... | 01/29/2008 |
| 7317274 | Piezoelectric devices and methods and circuits for driving same A drive circuit (18) senses a parameter of a piezoelectric actuator (14) operating in a device (10) and adjusts a drive signal of the piezoelectric actuator in accordance with the parameter. The drive circuit comprises a controller (100) ... | 01/08/2008 |
| 7312554 | Piezoelectric devices and methods and circuits for driving same A drive circuit (18) senses a parameter of a piezoelectric actuator (14) operating in a device (10) and adjusts a drive signal of the piezoelectric actuator in accordance with the parameter. The drive circuit comprises a controller (100) ... | 12/25/2007 |
| 7290993 | Piezoelectric devices and methods and circuits for driving same A drive circuit (18) produces a drive signal having a waveform of a predetermined waveform shape for a device (10) having a piezoelectric actuator (14). The drive circuit (14) includes a memory (140) which stores waveform shape dat... | 11/06/2007 |
| 7287965 | Piezoelectric devices and methods and circuits for driving same A drive circuit (18) produces a drive signal for a pump (10) having a piezoelectric actuator (14), with the piezoelectric actuator (14) forming a part of the drive circuit (18) and serving to shape a waveform of the drive signal. T... | 10/30/2007 |
| 7267043 | Actuators with diaphragm and methods of operating same Actuator assemblies comprise an actuator element and two piezoelectric assemblies, with the two piezoelectric assemblies being configured and arranged for controlling movement of the actuator element. In some example implementations, the first piezoelectric assembly... | 09/11/2007 |
| 7258533 | Method and apparatus for scavenging energy during pump operation A pump comprises a body for at least partially defining a pumping chamber (28); a pump member which undergoes displacement when acting upon a fluid in the pumping chamber; and a piezoelectric element which responds to the displacement of the pump member to ge... | 08/21/2007 |
