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, 1990
Filed:
Jan. 23, 1989
Bruce Taylor, Kensington, CT (US);
Cuno, Incorporated, Meriden, CT (US);
Abstract
According to the present invention, a locking means is provided for a filter cartridge and head unit. This locking means comprises a spring driven plunger, which preferably is supported by the head and comprises at least one detent, which preferably is disposed in the cartridge in the top wall upper surface thereof, whereby inadvertent disengagement of the cartridge from the head is prevented by engagement of the plunger and the detent, and whereby replacement of the cartridge is permitted by first lifting the plunger before rotating the cartridge through a requisite 90 degrees for disengagement thereof. By using the spring driven plunger and cooperating detent, the problem is avoided of a person, or a child, being able to inadvertently disengage the securing tabs from the securing tab receptacles. Also, in the case of the usual fluid dispensing machine where the head is fixedly attached to the underside of the dispensing machine, the problem of not having a suitable locking means is avoided and no special tools are required.