公开(公告)号：US2438327A

公开(公告)日：1948-03-23

申请号：US52261344

申请日：1944-02-16

Applicant: PATERSON ENGINEERING COMPANY L

Inventor： WILLIAM SMALLEY

IPC: C02F1/68

CPC classification number: C02F1/686 ,  Y10T137/2539 ,  Y10T137/479

公开(公告)号：US2384972A

公开(公告)日：1945-09-18

申请号：US46589342

申请日：1942-11-17

Applicant: PATERSON ENGINEERING COMPANY L

Inventor： WILLIAM SMALLEY

IPC: B01D24/20

CPC classification number: B01D24/205 ,  B01D24/44 ,  B01D24/4631 ,  B01D2201/48 ,  Y10T137/7759

Abstract: 552,302. Filters. PATERSON ENGINEERING CO., Ltd., and SMALLEY, W. Oct. 24, 1941, No. 13709. [Class 46] In a filter having a sand &c. bed a and a spillover wall b to prevent wastage of sand during cleansing by a reverse flow of wash water, the wall b is provided just above the bed a with one or more apertures d adapted to be opened and closed by means of one or more rollers or pads e operated by toggle lever or other mechanism to permit removal of the silt-laden waste water remaining above the bed after the sand has settled. The rollers or pads may be covered with rubber or like material. The impurities may be prevented from settling and washed through the apertures d by the continued application of wash water at a reduced rate, assisted, if desired, by a cross current of water. As shown, rubbercovered pads e of channel form are carried by pivoted arms g and operated by toggle lever mechanism h connected through link and lever mechanism k, l and bevel or screw-gear with a hand wheel i or a small electric motor under push button control. Alternatively, the rod k may be operated by a solenoid. Rollers may be adapted to be rolled over the surface of the wall b. The opening and closing of the apertures may be effected automatically in dependence on the rate of flow of wash water as by connecting the wash water inlet to a lightly-loaded diaphragm or other valve controlling the flow of pressure fluid to and from a cylinder having a piston connected with the pads &c. The rise in pressure of the wash water may also be utilized to close the electric circuit. Specifications 293,534, [Class 46], and 403,523 are referred to.