Filter media cartridge
First Claim
Patent Images
1. A filter cartridge, comprising:
- a pleated filter medium formed into a cylinder having upper and lower ends, the filter medium including radially extending pleats providing external folds defining an outer cylindrical contour and inner folds defining a central chamber;
upper and lower end caps respectively closing the upper and lower ends of the filter medium, said lower end cap having an opening;
a rigid hollow core provided in said central chamber of the filter medium; and
an outer collar circumferentially surrounding the filter medium, the outer collar comprising a plurality of radially inner uniformly spaced teeth receiving therebetween the external folds of the pleats, the collar being slidable along the longitudinal axial direction of the filter medium toward each of the end caps.
1 Assignment
0 Petitions
Accused Products
Abstract
A filter cartridge has a pleated filter media rolled into a cylinder, a tubular core, moulded from plastic with alternate grooves and ridges provided at the outer surface and a collar with uniformly spaced teeth which envelopes the filter media to rigidly space the pleats. The collar is retained by friction and it may be displaced towards the end caps of the cartridge. The core may be withdrawn from the filter media of a waste cartridge and utilized in a new cartridge. The upper end cap has a handle with a hinge provided by a reduced section of the plastic material.
-
Citations
12 Claims
-
1. A filter cartridge, comprising:
-
a pleated filter medium formed into a cylinder having upper and lower ends, the filter medium including radially extending pleats providing external folds defining an outer cylindrical contour and inner folds defining a central chamber; upper and lower end caps respectively closing the upper and lower ends of the filter medium, said lower end cap having an opening; a rigid hollow core provided in said central chamber of the filter medium; and an outer collar circumferentially surrounding the filter medium, the outer collar comprising a plurality of radially inner uniformly spaced teeth receiving therebetween the external folds of the pleats, the collar being slidable along the longitudinal axial direction of the filter medium toward each of the end caps. - View Dependent Claims (2)
-
-
3. A filter cartridge, comprising:
-
a pleated filter medium formed into a cylinder having upper and lower ends, the filter medium including radially extending pleats providing external folds defining an outer cylindrical contour and inner folds defining a central chamber; upper and lower end caps respectively closing upper and lower ends of the filter medium, said lower end cap having an opening; a rigid hollow core provided in said central chamber of the filter medium, said hollow core being slidable in said central chamber and with respect to the filter medium; and an outer collar circumferentially surrounding the filter medium, the outer collar comprising a plurality of radially inner uniformly spaced teeth receiving therebetween the external folds of the pleats, wherein the core has a cross-section that is smaller than the opening in the lower end cap such that the core may be extracted therethrough. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12)
-
Specification