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:
May. 21, 2002
Filed:
Jan. 14, 2000
Alejandro Moreno, El Paso, TX (US);
Javier Gomez, Juarez Chih, MX;
Delphi Technologies, Inc., Troy, MI (US);
Abstract
A two-stage parallel spring solenoid valve ( ) includes a coil housing ( ) with a plunger tube ( ) disposed therein. Disposed within the distal end ( ) of the plunger tube ( ) is a valve body ( ) that includes a valve seat ( ). A plunger assembly ( ) is disposed within the plunger tube ( ) and includes a plunger ( ) and a plunger rod ( ). An external spring ( ) and an internal spring ( ) are installed in parallel with each other within the plunger assembly ( ). The valve ( ) is movable from a closed configuration wherein the plunger rod ( ) is seated against the valve seat ( ) to block fluid flow through the valve ( ), to an intermediate configuration wherein the plunger ( ) further compresses the external spring ( ) and the internal spring ( ) and the plunger rod ( ) remains seated against the valve seat ( ), and to an open configuration, wherein the plunger rod ( ) is distanced from the valve seat ( ) to permit fluid flow through the valve ( ).