# US 7,744,757 B1 · Connection between filtering cap and container

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- Number: US 7,744,757 B1
- Document ID: US7744757B1
- Status: Granted
- Kind: B1
- Application number: 12/273,872
- Filed: 2008-11-19
- Granted: 2010-06-29
- Earliest claimed: 2008-11-19
- Inventors: I-Chung Liao
- Web page: https://patentgrep.com/patent/US7744757B1

## CPC

- B01D 35/30: Filter housing constructions
- B01D 2201/302: having inlet or outlet ports
- B01D 2201/4046: Means for avoiding false mounting of different parts
- C02F 2201/002: Construction details of the apparatus
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes)

## Abstract

A filtering assembly includes a container and a filtering cap which is connected to a connection end of the container. A flange extends spirally from an outside of the connection end and includes a positioning portion which is the longest section of the flange. The filtering cap includes an inner skirt and an outer skirt, wherein the inner skirt has a groove defined in an inside thereof the flange can be engaged with the groove. The groove has a positioning port which is the deepest portion of the whole groove. A plurality of bosses extend from an inside of the outer skirt. The positioning portion is engaged with the positioning port and the bosses are engaged with the wave-shaped ring when the filtering cap is located onto the container.

## Claims

### Claim 1

A filtering assembly comprising:
a container having a connection end on an end thereof and a flange extending spirally from an outside of the connection end, the flange having a positioning portion which is the longest section of the flange, a first inlet and a first outlet defined through the connection end and two seal rings mounted to two respective outsides of the first inlet and the first outlet, a wave-shaped ring located at an end surface of the container and the connection end extending from the end surface; and
a filtering cap having a second inlet and a second outlet defined in an outside thereof, the second inlet and the second outlet located communicating with the first inlet and the first outlet respectively, an inner skirt and an outer skirt located in the filtering cap, the inner skirt having a groove defined in an inside of the inner skirt and the flange engaged with the groove, the groove having a positioning port which is the deepest portion of the whole groove, a plurality of bosses extending from an inside of the outer skirt, the positioning portion being engaged with the positioning port and the bosses engaged with the wave-shaped ring when the filtering cap is located onto the container.