Micromachined silicon potentiometer responsive to pressure
Patent 5132658 Issued on July 21, 1992. Estimated Expiration Date: 
April 19, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 19, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3093806 3174125 3418850 Pressure responsive sender Force transducer Microminiature force-sensitive switch Method and apparatus for sensing tactile forces Catheter tip pressure transducer Patent #: 4722348 InventorsAssigneeApplicationNo. 511656 filed on 04/19/1990US Classes:338/92, Resistance element adjustably short-circuited338/42, Diaphragm338/47Force-actuatedExaminersPrimary: Lateef, Marvin M.Attorney, Agent or FirmInternational ClassesH01C 010/06H01C 010/10 AbstractA silicon pressure chip operates in a two-wire resistive mode. A thin-film resistor located on a long silicon beam which is the thicker portion of a thin diaphragm is partially shorted out by a metallized deflection stop. The pressure response of the resistor is determined by the resistor layout.Field of SearchForce-actuatedWith current reversing (e.g., reversing rheostat) Resistance element adjustably short-circuited Surfaces pressed together (e.g., compressible type) Unitary movable contact electrically bridges resistance portions With diaphragm-type biasing spring Deformable Additional resistor adjustably shunts part of resistance element (e.g., varifunction type Diaphragm Resistive By measuring electrical properties With independent operators Contacts on diaphragm | |
