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:
Apr. 10, 1979
Filed:
May. 15, 1978
Ronald O Simpson, Miami, FL (US);
Pedro P Cabrera, Miami, FL (US);
Coulter Electronics, Inc., Hialeah, FL (US);
Abstract
Improvements in a backwash system for diluting apparatus wherein a rinse solution is directed to the fluid transfer valve thereof and thence back to and through the sample pick-up probe to a receptacle and then to a waste depositary. The receptacle is mounted on a carrier, in turn mounted for movement in a track from a recessed condition, along a path directed first outward and then upward to engage the delivery end of the sample probe in a fluid tight sealed coupling. A plunger of an air cylinder effects the movement of the receptacle in the track. A vacuum operated switch is employed to assure that the rinse solution will not be dispensed as backwash unless the sealed coupling is made. Alternatively, a microswitch can be substituted for the vacuum operated switch and presented in the path of the carrier to be actuated when the carrier has moved sufficiently to establish the sealed coupling between the receptacle and the delivery end of the sample probe. In either instance, the switch is scanned to ascertain its state and unless actuated, backwash is prevented.