The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 31, 2004
Filed:
Aug. 26, 2002
Sang J. Choi, Homewood, IL (US);
Other;
Abstract
A dual function solid state relay for a motor control includes four solid state switches and 6 terminals, wherein a set of 2 switches are for up operation allowing a current flow through a load in one direction and the other set of 2 switches are for down operation allowing the current flow through the load in the opposite direction. Out of 2 switches during up operation, one switch connects V+ to one end of the load and the other switch connects a Ground to the other end of the load. During down operation mode, the operation is similar to the up operation except that the voltage polarities connected to the each end of the load is reversed. Out of 6 terminals, 2 are for up and down inputs and 2 are for the outputs to the load and the remaining 2 are for V+ connection and Ground connection. In another embodiment, with the addition of a input signal control circuit to the dual function solid state relay, only one input signal from a push button switch is required for the both, up and down, operations.