Liquid purification or separation – Structural installation – Grated inlet surface drain
Reexamination Certificate
2000-01-14
2001-07-03
Upton, Christopher (Department: 1724)
Liquid purification or separation
Structural installation
Grated inlet surface drain
C210S164000, C210S238000, C210S451000, C210S470000, C210S480000, C404S004000
Reexamination Certificate
active
06254770
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to sewer baskets that are removably mounted within a vertical sewer opening at street level, commonly known as storm sewers.
BACKGROUND OF THE INVENTION
These sewer baskets are used to filter coarse material such as branches, leaves, gravel and the like so as to prevent clogging of the sewer network. The sewer baskets are removed and cleaned from time to time and make sewage more easy to filter at the filtration station to which the sewer network is connected. The baskets are usually supported within the vertical sewer pipe at about three feet below street level and are removably supported by devices that are difficult to install or which require modification of the surface of the sewer pipe. For instance angle irons can be permanently secured to the sewer surface by screws driven into the sewer wall or as described in U.S. Pat. No. 530,816 to Wright entitled “Manhole for sewers” and dated Dec. 11, 1894, a metal sleeve has to be inserted into the manhole with an inturned rim at its lower end on which the frame of the sewer basket is releasably supported. Another example of a support system for a sewer basket is found in U.S. Pat. No. 122,209 dated Dec. 26, 1871 entitled “Improvement in sewer traps and catch basins” to Ashman et al. In this patent the sewer wall is modified at the desired level to provide a ledge all around the sewer pipe on which the sewer basket releasably rests.
OBJECTS OF THE INVENTION
The general object of the present invention is to provide a sewer basket support that can be releasably secured to the sewer wall at any adjustable level and without in any way modifying the structure of the sewer wall.
Another object of the present invention is to provide a sewer basket support that can be shaped to fit sewers of various cross-sectional shapes.
Another object of the present invention is to provide a sewer basket of a simple, inexpensive and yet long-lasting construction.
Another object of the present invention is to provide a sewer basket support frame which can be easily fitted to the sewer wall at an adjustable level and using standard tools and within a minimum of time.
SUMMARY OF THE INVENTION
This invention comprises the combination of a removable sewer basket with a sewer basket support for retaining said basket at a selected level within a vertical sewer pipe having an interior surface and an opening at street level, said basket including a basket frame, a filter screen secured to and closing said basket frame, said basket support comprising an expandable support for extending entirely around said interior surface of said sewer pipe, said support having at least one pair of opposite spaced free ends, an adjustable expansion device joining said opposite ends to expand said support against said interior surface of said sewer pipe and to fix said support to said interior surface at the selected level below street level, said basket frame releasably resting on said support, and a handle device accessible at street level to position and place said basket on and to retrieve said basket from said basket support.
Preferably, there is a crossbar secured to opposite sections of said basket frame, said handle device including a post, a handle at the upper end of said post, the lower end of said post attached to the middle of said crossbar.
An upright sleeve is secured to the middle of said crossbar, the lower end of said post releasably fitted within and attached to said sleeve.
Alternately, an eye member is secured to the middle of said crossbar and further including a hook member formed at the lower end of said post and removably engaging said eye member.
The support consists of a frame forming strip, said opposite ends formed by the ends of said strip and consisting of inturned perforated ears and said expansion device includes a bolt extending through and joining said ears and nuts screwed on said bolts and engaging said ears to spread said ears apart and retain said ears in adjusted spaced apart position.
The support is circular and has only one pair of opposite ends.
Alternately, the support has a quadrilateral shape being made of two U-shape sections with two pairs of opposite ends. The crossbar may be straight or downwardly angled and overlies the filter screen.
Preferably, the support has inwardly directed ears on which said basket removably rests.
Alternately, the support is a telescopic, straight tube including an inner and an outer tube sections, transversely opposite perforated ears outwardly extending from and secured to said inner and outer tube sections respectively on each side thereof, there being an expansion device on each side of said tube, each device including a bolt extending through and joining a pair of ears and nuts screwed on said bolts on each side of said ears to spread said ears apart and retain said telescopic tube sections in telescopically adjusted position.
REFERENCES:
patent: 122209 (1871-12-01), Ashman et al.
patent: 530816 (1894-12-01), Wright
patent: 815874 (1906-03-01), Stransky
patent: 1003398 (1911-09-01), Britzius
patent: 1548509 (1925-08-01), Campbell
patent: 2615526 (1952-10-01), Lane
patent: 3674149 (1972-07-01), Donalson
patent: 4097171 (1978-06-01), Fier
patent: 4152801 (1979-05-01), Lieber
patent: 4198717 (1980-04-01), Kessel
patent: 4419232 (1983-12-01), Arntyr et al.
patent: 5072538 (1991-12-01), Hendricks et al.
patent: 5232587 (1993-08-01), Hegemier et al.
patent: 5252211 (1993-10-01), Searfoss, Jr.
patent: 5372714 (1994-12-01), Logue, Jr.
patent: 5405539 (1995-04-01), Schneider
patent: 5643445 (1997-07-01), Billias et al.
patent: 5733445 (1998-03-01), Fanelli
patent: 5772713 (1998-06-01), Salinas et al.
patent: 5888392 (1999-03-01), Frizell
patent: 5904842 (1999-05-01), Billias et al.
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