Water filter having lever controlled plunger

• US 5,164,082 A
• Filed: 12/17/1991
• Issued: 11/17/1992
• Est. Priority Date: 12/17/1991
• Status: Expired due to Fees

• Current Assignee: Tzu-Fu Lin
• Original Assignee: Tzu-Fu Lin
• Inventors: Lin, Tzu-Fu
• Primary Examiner(s): Dawson, Robert A.
• Assistant Examiner(s): WALKER, WANDA LYNNE
• Application Number:
  US07/808,760
• Time in Patent Office: 336 Days
• Field of Search: 210/232, 210/234, 210/236, 210/237, 210/238, 210/263, 210/264, 210/282, 210/287, 210/416.3, 210/418, 210/420, 210/421, 210/422, 210/424, 210/425, 210/429, 210/435 , 210/440, 210/443, 210/456, 210/458, 210/460, 210/461, 210/470, 210/492, 210/497.01, 210/508, 137/549, 137/562, 137/625.16, 137/625.22, 137/625.23, 137/625.47
• US Class Current: 210/238
• CPC Class Codes: B01D 2201/307 Filtering elements contained in an insert body mounted in a filter housing (double casing), e.g. to avoid contamination when removing or replacing the filter element
• CPC Class Codes: B01D 29/15 arranged for inward flow filtration
• CPC Class Codes: B01D 29/6438 nozzles
• CPC Class Codes: B01D 29/66 by flushing, e.g. counter-current air-bumps
• CPC Class Codes: B01D 29/668 with valves, e.g. rotating valves for coaxially placed filtering elements
• CPC Class Codes: B01D 35/043 Reversible faucet filters
• CPC Class Codes: C02F 1/003 using household-type filters for producing potable water, e.g. pitchers, bottles, faucet mounted devices C02F9/20 takes precedence
• CPC Class Codes: C02F 2201/006 Cartridges
• CPC Class Codes: Y10T 137/85946 Faucet connected, sink drained
• CPC Class Codes: Y10T 137/86654 For plural lines

Abstract

A water filter comprising a hollow cylindrical base, a filter assembly fastened in said base at the top which is comprised of an inner filter tube covered with a braided outer filter tube, a cylindrical casing covered on said filter assembly and attached to said base at the top, a ater outlet pipe connected to said base at the bottom, a water intake pipe and a drain pipe respective connected to said base, a plunger fastened in a cylindrical hole inside said base and rotated by a lever, wherein said plunger has a plurality of water passage holes alternatively rotated by said lever to let an intake flow of water from said water intake pipe: (a) flow toward said water outlet pipe directly; (b) flow through said filter assembly to said water outlet pipe (c) flow through the space between said inner filter tube and said outer filter tube and then, penetrate through said outer filter tube toward said drain pipe; (d) flow into the space between said outer filter tube and said cylindrical casing and penetrate through said outer filter tube and then, flow toward said drain pipe; or (e) be stopped from flowing through said base.

Claims

1. A water filter, comprising:

a hollow, cylindrical base, said base comprising a cylindrical hole transversely disposed at the inside, an outer thread at the top, a water intake port aligned with said cylindrical hole at one end and connected to a water supply through a water intake pipe, an inner annular groove and an outer annular groove concentrically disposed on said top edge, two water inlet holes and two water outlet holes respectively made on said inner annular groove and said outer annular groove and communicated to said cylindrical hole, an upper water passage way and a lower water passage way vertically disposed at two opposite locations, a water outlet port attached with a water outlet pipe and communicated to said cylindrical hole through said lower water passage way, and a drain port vertical to said cylindrical hole and attached with a drain pipe;

a casing attached to said base at the top, said casing having one end opened and an opposite end closed, the opened end of said casing having an inner thread being in mesh with the outer thread on said base;

a filter assembly held inside said casing, said filter assembly consisted of inner filter tube and an outer filter tube, said inner filter tube being made from a solid tube stuffed with sponges and active carbons and having two opposite ends sealed with a top end cap and a bottom end cap respectively, said outer filter tube being made from a braided fiber cloth sleeved on said inner filter and retained between said two end caps;

a plunger fastened in said cylindrical hole of said base and rotated by a lever, said plunger comprising an elongated rod extending from a cylindrical body, said elongated rod being extended out of said base and coupled with said lever, said cylindrical body having a recessed water chamber at one end disposed adjacent to said water intake port and a plurality of water passage holes separately communicated to said recessed water chamber; and

wherein rotating said lever causes said plunger to guide an intake flow of water to (a) flow toward said water outlet pipe directly;

(b) flow through said filter assembly to said water outlet pipe;

(c) flow through the space between said inner filter tube and said outer filter tube and then, penetrate through said outer filter tube toward said drain pipe;

(d) flow into the space between said outer filter tube and said cylindrical casing and penetrate through said outer filter tube and then, flow toward said drain pipe;

or (e) be stopped from flowing through said base.

2. The water filter of claim 1, wherein said top end cap is made from a cylindrical, stepped block comprised of a narrower body portion extending from a wider head portion, said body portion having an annular groove around a peripheral surface thereof adjacent to said head portion and a plurality of water passage holes on a bottom edge thereof respectively communicated to the annular groove thereof for passing a flow of water.

3. The water filter of claim 1, wherein said bottom end cap is made from a stepped block comprising a first connecting end at one end connected to said base, a second connecting end at an opposite end connected to said inner filter tube, a circular flange at the middle divided into an upper ring and a lower ring by an annular groove, and a through hole through the central axis thereof and connected between said inner filter tube and said upper water passage way of said base, said lower ring comprising two concentric, ring-shaped water passage ways, said two concentric, ring-shaped water passage ways including an inner ring-shaped water passage way passing through said upper ring, and an outer ring-shaped water passage way communicated to the annular groove between said upper and lower rings.

4. The water filter of claim 1, wherein said inner annular groove and said outer annular groove are respectively disposed at locations corresponding to said inner ring-shaped water passage way and said outer ring-shaped water passage way of said bottom end cap.