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:
Feb. 16, 2010
Filed:
Mar. 21, 2008
Paul W. Eserkaln, Sheboygan, WI (US);
Michael D. Steinhardt, Kiel, WI (US);
Terry P. Zerger, Howards Grove, WI (US);
Thomas E. Gaffney, Sheboygan, WI (US);
Paul W. Eserkaln, Sheboygan, WI (US);
Michael D. Steinhardt, Kiel, WI (US);
Terry P. Zerger, Howards Grove, WI (US);
Thomas E. Gaffney, Sheboygan, WI (US);
Pentair Filtration, Inc., Sheboygan, WI (US);
Abstract
A modular filter system using replaceable filter cartridges includes a locking arrangement that prevents rotation of the flow control valve spindle in the filter head, but includes an unlocking arrangement on the cartridge that unlocks the locking arrangement if the proper replacement cartridge is used. The locking arrangement may include spring biased locking pins carried on the filter head and matching unlocking pins on the filter cartridge to operate through an intermediate adaptor ring that is set on assembly to match the positions of the locking and unlocking pins.