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:
Jul. 17, 2012
Filed:
Aug. 04, 2008
Hon Yu Peter NG, Hong Kong, CN;
Dazhang Liao, Hong Kong, CN;
Wing Fung Jacob Cheung, Hong Kong, CN;
Ping Kong Choy, Hong Kong, CN;
King Sang Tsui, Hong Kong, CN;
Hon Yu Peter Ng, Hong Kong, CN;
Dazhang Liao, Hong Kong, CN;
Wing Fung Jacob Cheung, Hong Kong, CN;
Ping Kong Choy, Hong Kong, CN;
King Sang Tsui, Hong Kong, CN;
ASM Assembly Automation Ltd, Hong Kong, HK;
Abstract
A liquid dispensing apparatus is provided which has a syringe for storing and dispensing a liquid, and a connector passage connected to the syringe. A positive pressure passage is connected to an air source for supplying positive pressure to the syringe, and there is a pressure valve located along the positive pressure passage that is operative to control the flow of air along the positive pressure passage. A vacuum passage is connected to a vacuum generator for supplying vacuum pressure to the syringe, and there is a vacuum valve located along the vacuum passage that is operative to control the flow of air along the vacuum passage. The positive pressure passage and vacuum passage are connected to the connector passage. A pressure sensor is also provided to measure the pressure in the connector passage.