US3640392A — Pressurized liquid-filtering apparatus

Claim 1

Independent Claim 229 words

Pressurized liquid-filtering apparatus comprising, in combination, a vessel having a liquid-filtering chamber provided with a cylindrical wall and a liquid outlet in the bottom thereof; a cover hinged to said wall for closing the top of said vessel and providing ready and complete access to the filtering chamber when the cover is swung open; hinge means comprising means for conducting liquid under pressure to the top of such filtering chamber through an opening in said cover when the latter is closed; permanent external plumbing connection means for supplying liquid under pressure to said hinge liquid-conducting means, a basket comprising an annular upper flange member for supporting the basket in such chamber on the top of said cylindrical wall with a uniform cylindrical space between such wall and the basket, said flange member having an inwardly and upwardly facing groove therein, a filter bag having a ring bound in the upper edge thereof disposed in said basket with such upper edge partially nested in such groove in the flange member, multiple O-rings associated with said flange member for sealing the annular space between the inner surface of said cover and the top surface of said wall when the cover is clamped-closed, and manually operable means for clamping said cover on the top of said cylindrical wall, with the upper edge of the bag compressed between the cover and flange member.

Claim 2

Dependent Claim 229 words

Pressurized liquid-filtering apparatus comprising, in combination, a vessel having a liquid-filtering chamber provided with a cylindrical wall and a liquid outlet in the bottom thereof; a cover hinged to said wall for closing the top of said vessel and providing ready and complete access to the filtering chamber when the cover is swung open; hinge means comprising means for conducting liquid under pressure to the top of such filtering chamber through an opening in said cover when the latter is closed; permanent external plumbing connection means for supplying liquid under pressure to said hinge liquid-conducting means, a basket comprising an annular upper flange member for supporting the basket in such chamber on the top of said cylindrical wall with a uniform cylindrical space between such wall and the basket, said flange member having an inwardly and upwardly facing groove therein, a filter bag having a ring bound in the upper edge thereof disposed in said basket with such upper edge partially nested in such groove in the flange member, multiple O-rings associated with said flange member for sealing the annular space between the inner surface of said cover and the top surface of said wall when the cover is clamped-closed, and manually operable means for clamping said cover on the top of said cylindrical wall, with the upper edge of the bag compressed between the cover and flange member.

Claim 3

Dependent Claim 34 words

The invention as defined by claim 1, in which said O-rings are disposed in concentric relationship to each other and to said flange member, with an annular portion of the latter separating said O-rings.

Claim 4

Dependent Claim 88 words

The invention as defined by claim 2, in which said flange member comprises a downwardly opening channel containing one O-ring in contact with the top of said wall adjacent the inner edge thereof, and an upwardly opening channel containing the other O-ring in contact with the under surface of the cover when closed, and the entire O-ring and flange member assembly is removable with the basket and bag when the cover is open, yet provides highly effective seal when the cover is closed and clamped in such position.

Claim 5

Dependent Claim 34 words

The invention as defined by claim 3, in which said cover comprises a liquid inlet manifold having a handle portion at the inner end thereof, and a hinge portion at the outer end thereof.

Claim 6

Dependent Claim 66 words

The invention as defined by claim 1, in which said hinge means includes a stationary pipe elbow and a movable pipe elbow connected to the stationary elbow by a joint permitting the cover to be swung open and closed about the axis of the hinge means without breaking such joint, and a short pipe and elbow connecting the opening in the cover to said movable elbow.

Claim 7

Dependent Claim 194 words

A vessel for filtering liquid under pressure comprising, in combination: a hollow body having a cylindrical sidewall merging into a concavo-convex lower portion provided with an outlet at the bottom thereof; a cover for the top of said body having a central liquid inlet therein; hinge means connecting said cover to said body for swinging movement of the cover upwardly and lateral about a fixed axis to completely swing-open the top of said body; clamp means for securing said cover in closed position on said body; a removable filter bag in said body opening upwardly to the liquid inlet in said cover; plumbing means for delivering liquid to be filtered under pressure through such liquid opening in the cover, comprising a stationary elbow having one arm concentric with such fixed axis, a swingable elbow having a corresponding arm that is also concentric with such axis, and seal-means connecting said arms of the stationary and swingable elbows whereby said cover can be opened and closed by a swinging movement about such axis without breaking said seal means upon release of said clamp means and opening of the cover to provide access to said filter bag.

Claim 8

Dependent Claim 194 words

A vessel for filtering liquid under pressure comprising, in combination: a hollow body having a cylindrical sidewall merging into a concavo-convex lower portion provided with an outlet at the bottom thereof; a cover for the top of said body having a central liquid inlet therein; hinge means connecting said cover to said body for swinging movement of the cover upwardly and lateral about a fixed axis to completely swing-open the top of said body; clamp means for securing said cover in closed position on said body; a removable filter bag in said body opening upwardly to the liquid inlet in said cover; plumbing means for delivering liquid to be filtered under pressure through such liquid opening in the cover, comprising a stationary elbow having one arm concentric with such fixed axis, a swingable elbow having a corresponding arm that is also concentric with such axis, and seal-means connecting said arms of the stationary and swingable elbows whereby said cover can be opened and closed by a swinging movement about such axis without breaking said seal means upon release of said clamp means and opening of the cover to provide access to said filter bag.

Claim 9

Dependent Claim 39 words

The invention as defined by claim 6, in which said cover comprises a short pipe that serves as a handle a liquid inlet passage connecting the other arm of said swingable elbow with the liquid inlet in said cover.

Claim 10

Dependent Claim 113 words

The invention as defined by claim 1, including a screen-bracket for restraining said filter bag comprising an upper rim connected thereto, said rim having a horizontal annular flange having a downwardly facing inner channel and an upwardly facing outer channel overlapping the annular flat top surface of said body, said body having an internal annular top flange the inner wall surface of which fits the corresponding lateral surface of said rim, a liquid sealing O-ring located in each of said annular channels for effective sealing contact with the under surface of said cover and the inner-upper edge of said body flange, respectively, when the cover is closed and secured by said clamp means.

Claim 11

Dependent Claim 75 words

The invention as defined by claim 8, in which said rim is provided with an annular L-shaped groove between said inner channel and the inner wall of said rim, which groove faces inwardly and upwardly, and said filter bag comprises an upper bead having an inner downwardly depending flap, whereby said bead sets snugly in such groove when the bag is located in said basket, and provides an additional seal when the cover is closed.

Claim 12

Dependent Claim 55 words

The invention as defined by claim 9, in which means are also provided between said cover and body for limiting the downward movement of said cover with respect to said rim flange for protecting the latter when said clamp means are tightened, and for also guiding the cover vertically as the latter is finally closed.

Claim 13

Dependent Claim 144 words

The invention as defined by claim 10, in which a hinge bracket is mounted on the vessel having a spacer plate for separating the back portion of the under surface of the cover a predetermined distance from the top of said annular wall when the cover is clamped closed, said plate having a hole in communication with a corresponding hole in the cover; means including an O-ring for sealing the joint between such holes when the cover is closed; a manifold mounted on said cover having a longitudinal passage for carrying liquid under pressure from such hole to the central opening in said cover; said manifold comprising a handle for said cover, and a hinge member therefor; and a transverse pin connecting said hinge member to said hinge bracket, permitting the cover to be swung upwardly and backwardly about the axis of said pin.

Claim 14

Dependent Claim 27 words

The invention as defined by claim 11, in which a stop bar and cover centering guides are provided between the body and cover adjacent the front thereof.

Claim 15

Dependent Claim 154 words

A sealing O-ring and basket assembly in combination with a pressurized liquid-filtering vessel having a top cover hinged to the body thereof, comprising a flange member having contiguous concentric individual upwardly and downwardly facing channels, said channels being provided with upwardly and downwardly facing grooves and a third groove for carrying an enlarged bead constituting an upper rim of a filter bag, said cover being constructed and arranged to coact with said enlarged bead and said third groove, corresponding O-rings carried in said channels for sealing contact with the undersurface of said cover and the top surface of a cylindrical Wall of said body when said cover is closed, and a basket comprising a screen depending from said flange member into the filter chamber of said body for containing a filter bag therein, whereby the assembly can be manually inserted in and removed from the body as a unit when the cover is opened.

Claim 16

Dependent Claim 154 words

A sealing O-ring and basket assembly in combination with a pressurized liquid-filtering vessel having a top cover hinged to the body thereof, comprising a flange member having contiguous concentric individual upwardly and downwardly facing channels, said channels being provided with upwardly and downwardly facing grooves and a third groove for carrying an enlarged bead constituting an upper rim of a filter bag, said cover being constructed and arranged to coact with said enlarged bead and said third groove, corresponding O-rings carried in said channels for sealing contact with the undersurface of said cover and the top surface of a cylindrical Wall of said body when said cover is closed, and a basket comprising a screen depending from said flange member into the filter chamber of said body for containing a filter bag therein, whereby the assembly can be manually inserted in and removed from the body as a unit when the cover is opened.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1975-02-07	1975-08-09	1976-02-08	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1979-02-07	1979-08-09	1980-02-08	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1983-02-07	1983-08-09	1984-02-08	$7700.00	Window Closed / Lapsed

Pressurized liquid-filtering apparatus

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