US1722626A

US1722626A - Suction filter

Info

Publication number: US1722626A
Application number: US259444A
Authority: US
Inventors: George H Dean
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-03-06
Filing date: 1928-03-06
Publication date: 1929-07-30
Anticipated expiration: 1946-07-30

Description

Patented duly 39, 1929.

narran stares @EGBGB H. D 5,

, 01E" NORWOOD, RHODE ISLN.

Application led March 6, 1928. Serial No. 259,444.

My invention relates to suction filters of the porous type. y

The essential objects of my inven-l tion are to subject the entire porous wall l'distribute the suction throughout its entire length, whereby the clogging of the pores `is materially delayed; to lessen the amount of vacuum required to be produced by the pump or other suction apparatus; to prevent the clogging of the inlets of the suction pipe; to prevent entrance of the sand through the suction pipe into the suction device; to enable the facile substitution of any broken part of the filter; to facilitate the assembla e of the filter parts; and to attain these en s in a simple and inexpensive manner.

To the above ends essentially my invention consists in such parts and in such combinations of parts as fall'within the scope of the appended claims.

In the accompanying drawings which form a part of this specification Figure l is a plan view of my filter,

Figure 2, a vertical section of the same,

Figure 3, a transverse section on line 3-3 of Figure 2, and v Figure 4, a sectional view of a well or cistern shown in side elevation with my device mounted therein.

My filter in its preferred embodiment comprises a cylindrical side 7 of any well known porous material suitable for this purpose, such as a hardened mixture of sand and cement. The wall is of substantial thickness with smooth end faces.

A circular metallic base plate 9 of a diamter equal to that of the exterior of the side has a peripheral upturned flange 10 adapted to embrace the lower end of the side 7. The base in this instance has a central cylindrical projection l2 integral with its upper face registering in the lower end of a section 13 of the suction pipe, to which projection the section is united by welding or otherwise so as to insure a rigid connection. The pipe section is provided at its upper end with an external thread 14 and near its bottom end with diametrically oppositely 5o disposed inlet openings l5. Integral with the base 9 is a substantially cylindrical baffie plate 17 concentric with the suction pipe section 13 and spaced from both the latter and the side 7. Its exterior face is preferably slightly tapering upwardly and inward- .i of the filter to suction, and to evenly`\section 13 or the side 7.

l embrace the latter.

ly presenting a slightly trunco conical appearance, as at 18. It is essential for the best results that the height of the bae plate not extend above half the height of the pipe A circular metallic top plate 20 adapted to rest upon the top face of the side 7 has a depending peripheral flange 21 adapted to Upon the central portion of its upper face the plate 20 has a po- 65 lygonal elevation or integral nut portion 23 to accommodate a wrench. rIhe center of this plate and elevation is provided with a hole 24 having an internal thread 25 adaptto engage the thread 14 upon the pipe sec- 70 tion 13.

In assembling the described parts into a complete suction filter 27 the side 7 is placed upon the base plate 9. The combined top and clamping plate is next applied to the pipe section 13 above the side-7 and, by a wrench applied to the elevation 23, screwed tightly down, thereby clamping the three members into secure interengagement. When thus clamped it will be found that 30 there results a large closed cylindrical central chamber 29 divided in its lower portion by the baffle plate into two substantially

annular sub chambers

30 and 31, exterior and interior respectively of the baille plate.

After the filter has been assembled as above described it may be connected with a longer suction pipe section 33 by a coupling sleeve 35 or otherwise. The pipe section 33 is herein shown connected with a suction mechanism or device 37 which is in this instance a pump. The filter depends in this instance near the bottom of a well or cistern 39 closed by a cover 40 which supports the pump.

In operation the water is, by suction through the pipe 13, drawn from the exterior of the filter with even force through the side 7 from top to bottom, as indicated by the arrows, and thence down through the sub chamber 31 and the openings 15 into the pipe section, and upwardly therethrough. rI'he prolongation of the baffle plate to a point approximately midway the height of the filter is to increase the resistance'to the ingress of water as the bottom of the filter is approached to correspond with the increase of pressure, with the result that the ingress of Water through the porous side of the filter is distributed more evenly throughout the length thereof. The presence of the abutment is found to lessen the amount of vacuum required to be produced by the suction device, and lessening the vacuum also results in causing any incoming sand from the filter side to more readily fall into the sub chamber 30 instead of into the chamber 31. The baile plate by thus walling oli' any incoming sediment not only causes it to be deposited in the chamber 30 but thereby prevents its clogging the openings yl5 or ultimately entering and injuring the pump.

It will be noted that the utilization of the top plate 20 as a clam affords a facile means of assembling and isassembling the constituent parts of the filter for the removal of sand accumulation or replacing broken parts.

It will be further noted that the rigid connection of the suction pipe 13 with the bottom plate stidens the entire filter structure to a remarkable degree.

Furthermore the parts of the structure are reduced to a minimum.

I claim: y

1. In a suction filter, a base plate, a tubular porous side upon the plate, a suction pipe ixed at its lower end to the center of the plate concentric with the side and provided with inlets near its lower end, a baille plate upon the base plate surrounding the pipe and spaced from the pipe and side and extended up a large portion of the height of the filter wall, and a plate upon the top of the side engaging the pipe.

2. In a suction lilter, a base plate, a suction pipe fixed at one end to the center of the base provided with inlets, a tubular porous sidev resting uponwthe plate exterior of the pipe, a baille plate integral with the base plate between the pipe and side and ex- .tended up a large portion 'of the height tially cylindrical bale plate integral with the base plate and extended' up a large portion of the height of the filter wall, a clamping plate resting upon the side, and provided with a central hole to receive the pipe therethrou h and with a thread in the hole engaging 51e thread yupon the pipe.

4. A suction filter comprising a base plate, a top plate, the base plate having rigid' therewith an upwardly extending baille late and extended up a large portion' -o the height of the filter wall, a porous surrounding wall, a suction pipe extended upward beyond the baiile plate and communicating near its lower end with the space enclosed by said bafile plate, a top plate through which the upper end of the suction pipe eX- tends, the lower endv of said pipe being mounted within the space enclosed by the baille plate, and a detachable connection between the upper end of the pipe and top ate. p In testimony whereof I have aiixed my signature.

GEORGE H. DEAN.