Back to results
US 4,364,070 AGranted
Drop jet apparatus
AssigneesHitachi, Ltd., Hitachi Koki Co., Ltd.
InventorsYasumasa Matsuda, Syoji Sagae, Masatoshi Kasahara, Hiroyasu Uchida
Life of this patent
Estimating the term…
Abstract
A drop jet apparatus has a nozzle head which defines a pressure chamber, a nozzle, and passages. Part of the pressure chamber is defined by a thin diaphragm which is made thick at the central and at a surrounding portion spaced from the central portion. A piezoelectric plate is adhered to the thick portions so as to bridge the thin portion between the projections.
Claims9
A drop jet apparatus comprising housing means defining a pressure chamber;
- nozzle means communicating with said pressure chamber for jetting drops therethrough;
- diaphragm means, included in said housing means for defining a part of said pressure chamber, said diaphragm means having a thick central portion at the center and a thin portion surrounding said thick central portion;
- electro-mechanical transducer means, disposed on said housing so as to bridge said thin portion and secured to said diaphragm means at said thick central portion for deforming said diaphragm according to electric signals;
- liquid reservoir means communicating with said pressure chamber for storing therein a liquid;
- and
- electric signal generator means electrically connected to said electro-mechanical transducer means.
3 more elements
A drop jet apparatus comprising;
- a base plate, formed with recesses for a pressure chamber, passages for liquid and a nozzle communicating with said pressure chamber through one of said passages, and having a deflective diaphragm, said deflective diaphragm defining said pressure chamber and having a central projection at the center of the opposite side to the pressure chamber and a thin portion surrounding said central projection;
- a piezoelectric plate disposed on and secured to said base plate so as to bridge said thin portion of said diaphragm;
- a lid member secured to said base plate so that said pressure chamber, said nozzle and said passages are formed;
- a liquid reservoir connected to said pressure chamber;
- and
- an electric pulse generator electrically connected to said piezoelectric plate.
3 more elements
Dependencies are inferred from the claim text.