A water purifying filter has a cylindrical inner housing to receive a filter therein, and an outer housing to receive the inner housing. The inner housing and the outer housing are spaced apart from each other to form an insulation space configured to suppress heat transfer and to reduce the filter freezing inside the inner housing.

A filter device for filtering fluid particularly an aqueous urea solution, includes a filter housing (1), a filter element (11) and a compensating element (31) for compensating fluctuations in the pressure and/or volume of the fluid. At least one elastically-flexible membrane (31) serves as the compensating element. The membrane wall of of the membrane is held in a retaining part (35) and maintains a separation between the fluid and a compressible filling medium such as a working gas.

A filter device for filtering fluid particularly an aqueous urea solution, includes a filter housing (1), a filter element (11) and a compensating element (31) for compensating fluctuations in the pressure and/or volume of the fluid. At least one elastically-flexible membrane (31) serves as the compensating element. The membrane wall of of the membrane is held in a retaining part (35) and maintains a separation between the fluid and a compressible filling medium such as a working gas.

A waterproof, non-toxic, and reusable filter media retaining cup having molded construction, a non-compartmentalized interior space, and a perimeter wall with a preferred slight top-to-bottom taper extending between a radial flange and an opposed bottom end having spaced-apart perforations and a non-perforated center area. The outwardly-extending radial flange depends from the top of the perimeter wall and spaced-apart slits through the perimeter wall's bottom portion extend to the bottom end and are preferably downwardly-widening. The bottom end perforations and wall slits in combination with the bottom end's non-perforated center area provide accelerated aquarium water turnover through contaminant-removing filter media retained in the non-compartmentalized interior space, while avoiding clogging and channeling that would otherwise slow the breakdown and removal of uneaten food particles and marine life bio-waste in the aquarium water, which in increasing concentrations becomes toxic to the marine life in an aquarium tank depending on it for survival.

A waterproof, non-toxic, and reusable filter media retaining cup having molded construction, a non-compartmentalized interior space, and a perimeter wall with a preferred slight top-to-bottom taper extending between a radial flange and an opposed bottom end having spaced-apart perforations and a non-perforated center area. The outwardly-extending radial flange depends from the top of the perimeter wall and spaced-apart slits through the perimeter wall's bottom portion extend to the bottom end and are preferably downwardly-widening. The bottom end perforations and wall slits in combination with the bottom end's non-perforated center area provide accelerated aquarium water turnover through contaminant-removing filter media retained in the non-compartmentalized interior space, while avoiding clogging and channeling that would otherwise slow the breakdown and removal of uneaten food particles and marine life bio-waste in the aquarium water, which in increasing concentrations becomes toxic to the marine life in an aquarium tank depending on it for survival.

A fluid filter removal device includes a fluid catch configured to circumscribe an outer surface of a fluid filter, a filter spacer configured to maintain a minimum separation between the outer surface of the fluid filter and an inner surface of the fluid catch when at least a portion of the fluid filter is circumscribed by the fluid catch, and a fluid filter sheath, fixed and hydraulically sealed to the fluid catch proximate the filter exit end of the fluid catch. The fluid filter removal device provides a device and method for removal of oil or fuel filters, and to contain contaminated fluids, on automotive, heavy and other types of equipment to eliminate contamination to the environment as well as contamination to vehicles and users changing a fluid filter.

A fluid filter removal device includes a fluid catch configured to circumscribe an outer surface of a fluid filter, a filter spacer configured to maintain a minimum separation between the outer surface of the fluid filter and an inner surface of the fluid catch when at least a portion of the fluid filter is circumscribed by the fluid catch, and a fluid filter sheath, fixed and hydraulically sealed to the fluid catch proximate the filter exit end of the fluid catch. The fluid filter removal device provides a device and method for removal of oil or fuel filters, and to contain contaminated fluids, on automotive, heavy and other types of equipment to eliminate contamination to the environment as well as contamination to vehicles and users changing a fluid filter.

A filter assembly includes a filter head and a filter cartridge. The filter head includes a filter head coupling surface, a filter head outlet, a filter head inner wall, and a filter head outer wall. The filter head coupling surface defines a filter head opening. The filter head outlet is configured to provide a fluid. The filter head inner wall extends around the filter head outlet. The filter head outer wall extends around the filter head inner wall. The filter head inner wall and the filter head outer wall collectively define a filter head channel. The filter cartridge includes a filter cartridge shell and a filter element. The filter cartridge shell has a filter cartridge coupling surface that is configured to be coupled to the filter head coupling surface. The filter cartridge shell defines a filter cartridge opening.

A filter assembly includes a filter head and a filter cartridge. The filter head includes a filter head coupling surface, a filter head outlet, a filter head inner wall, and a filter head outer wall. The filter head coupling surface defines a filter head opening. The filter head outlet is configured to provide a fluid. The filter head inner wall extends around the filter head outlet. The filter head outer wall extends around the filter head inner wall. The filter head inner wall and the filter head outer wall collectively define a filter head channel. The filter cartridge includes a filter cartridge shell and a filter element. The filter cartridge shell has a filter cartridge coupling surface that is configured to be coupled to the filter head coupling surface. The filter cartridge shell defines a filter cartridge opening.

This disclosure reports embodiments of a fluid filter for ESD mitigation having a conductive polymer sleeve. Embodiments of this filter may include a conductive sleeve and tie bands to mitigate electrostatic discharge.