| Patent Number |
Title Of Patent |
Date Issued |
| 6496448 |
Transducer receiving voltage inputs, such as square waves, rich in harmonics |
December 17, 2002 |
| A transducer member is made from a piezoelectric material (e.g. barium titanium) having a looped configuration and a gap in the loop and having properties of vibrating upon the introduction of an electrical voltage to the transducer member. A support member made from steel or aluminum an |
| 6491095 |
Transducers, and methods of producing transducers, with cryogenically treated transducer members |
December 10, 2002 |
| A transducer provides (a) increased magnitudes of vibrations without cracking and (b) increased power to the transducer, in response to alternating voltages, for producing transducer vibrations with increased magnitudes. A polycrystalline ceramic (e.g. polycrystalline lead titanate o |
| 5122992 |
Transducer assembly |
June 16, 1992 |
| A support member preferably made of a metal such as cold rolled steel is disposed in a looped configuration and is provided with a gap. A transducer member preferably made of a piezoelectric material such as a ceramic is disposed within the support member. The transducer member is pr |
| 4788467 |
Downhole oil well vibrating system |
November 29, 1988 |
| A transducer assembly includes a piezoelectric transducer and a support member encasing the transducer. The transducer and the support member may have commonly disposed openings. The support member has a progressively increasing thickness at progressive positions from the opening to |
| 4774427 |
Downhole oil well vibrating system |
September 27, 1988 |
| A transducer assembly includes a piezoelectric transducer and a support member encasing the transducer. The transducer and the support member may have commonly disposed openings. The support member has a progressively increasing thickness at progressive positions from the opening to |
| 4682070 |
Downhole oil well vibrating system |
July 21, 1987 |
| A transducer assembly includes a piezoelectric transducer and a support member encasing the transducer. The transducer and the support member may have commonly disposed openings. The support member has a progressively increasing thickness at progressive positions from the opening to |
| 4658897 |
Downhole transducer systems |
April 21, 1987 |
| A casing in an oil well is constructed to provide for the flow of oil in the well. The casing cylindrical and may be perforated. The casing is resonant in a hoop mode at a particular fundamental frequency such as approximately 400 hertz. A transducer includes a transducer member disp |
