GB1003463A - Mobile filter device - Google Patents

Abstract

1,003,463. Filters for liquids. ROSAEN FILTER CO. May 12, 1964 [May 13, 1963 (2) ; Jan. 27, 1964 (2)], No. 19649/64. Heading BID. A filter element 68, Fig. 1, is secured to a rod 58 slidable in a boss 56, the element thereby being slidable in a tube 22, the latter being clamped by a ring 24 welded to a base plate 26 secured to the top of a reservoir 10. Downward movement of rod 58 is limited by a snap ring 59. On partial clogging, the element, the rod 58 and a slotted arm member 90 rise against the pessure of a spring 74, a pointer 82 being rotated by interaction of arm member 90 with an actuator member 88 carried by the pointer, and thereby indicating the clogged condition. On further clogging, a valve 78 is lifted against the pressure of a spring 80, enabling bypassing of the filter element. The filtrate outlet 92 is connected by a conduit 94 with the intake of a pump 14 ; conduit 94 serves to support housing structure 46 so that when bolts 100 are removed, flange 50 (integral with flange 98 and structure 46), rod 58 and filter element 68 may be withdrawn from the reservoir as a unit leaving tube 22 clamped in position. Other embodiments (not shown): in Fig. 5, flange 50 is screwed to tube 22 ; in Fig. 6, flange 50 is integral with tube 22 ; in Fig. 7, the filter element extends to a point below tube 22 ; in Fig. 8, spring 80 is omitted, the valve member is fixed on rod 58, and the filter element slides along the valve member as well as along the inside of tube 22 ; Fig. 12 has the features of Fig. 8, but flange 50 is integral with tube 22. In Fig. 15, a tube 722 has secured to it a collar 724 by which it may be positioned on the cover plate 416 of a reservoir. A cap 746 has an integral boss 756 carrying a rod 758. A member 768 is held against a shoulder 757 on the boss 756 by a filter cartridge 764. Liquid filtering inwards through the cartridge passes upwards through holes 769 in member 768 and out through port 706. On clogging, a piston member 772 sliding both on interior face 771 (tube 722), and on exterior face 770 (member 768), rises to uncover openings 773 in member 768 to permit by-passing. An indicator assembly 775 is provided.