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:
Mar. 27, 2001
Filed:
Aug. 06, 1999
Jerome T. Pereira, San Jose, CA (US);
Robert E. Woodworth, Sunnyvale, CA (US);
Microbar Systems, Inc., Sunnyvale, CA (US);
Abstract
A dual pump for independently pumping two fluids includes a pump body having a first concave depression on a first side of the body. A first inlet port and a first outlet port are contained within the body, in fluid communication with the first depression. A second concave depression is on a second side of the body opposite the first depression. A second inlet port and a second outlet port are contained within the body in fluid communication with the second depression. A first diaphragm is coupled to the first side of the body and encloses the first depression to form a first inner chamber. A second diaphragm is coupled to the second side of the body and encloses the second depression to form a second inner chamber. A shell encloses the body on its first and second sides. The shell defines a first outer chamber with the first diaphragm in pressure communication with the first inner chamber. The shell also defines a second outer chamber with the second diaphragm in pressure communication with the second inner chamber. A first pressure port in the shell provides a first pressure passage to the first outer chamber. A second pressure port in the shell provides a second pressure passage to the second outer chamber. Advantages include simultaneously and independently providing two fluid pumps within a pump that is substantially the same size as a conventional single pump. Alternatively, the pump is configured to supply a continuous, non-pulse flow of a single liquid.