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:
Jun. 21, 2011
Filed:
Apr. 24, 2009
Thomas Chun, Northridge, CA (US);
Thomas Chun, Northridge, CA (US);
Other;
Abstract
An injection device such as a syringe, which has a helical flow path for a solution in which the solvent and solute have been introduced. The helical flow path is formed by a helically configured member which has general overall configuration of a helical coil spring. Individual coils may be formed to have a groove located along the length of the helix. When compressed, the novel member effectively takes on a cylindrical outer configuration. Because the groove is covered and sealed by the surface of the next turn of the helix when compressed, an enclosed helical flow path is formed in the compressed member. The invention may be an injection device using the novel flow path forming member or alternatively, the flow path forming member itself.