Patent GB-1450999-A (GB)
Title: Apparatus for cleaning brew head screen
IPC: A47J31/24
Filed: 1974-04-11
Abstract: 1450999 Cleaning filter screen COFFEEMAT CORP 11 April 1974 [16 April 1973] 16411/74 Heading A4E [Also in Division B1] A brewing device comprises a brew cup 37 having a top opening and means 34, providing liquid communication with said brew cup below said top opening, a cover member longitudinally movable between an advanced position, Fig. 5, in vertical registry with said brew cup and a retracted position, Fig. 4 (not shown), remote from said brew cup and having a perforated bottom wall 28, and a brush member 90 located under said cover member, projecting above the underface of said perforated wall 28, extending for the width thereof and disposed between the retracted and advanced positions of said cover member. The cover member is included in a cover assembly 16 and the member itself is coincident with a plate with a depending wall (26) across which wall 28 extends, wall 28 and the plate defining a chamber (29) which communicates with a vertical coupling pipe 30 engaged by a hose (32) Fig. I (not shown) which extends to a discharge device. The perforated bottom wall comprises a woven metal wire filter screen. The brush member 90 is vertically movable and is upwardly resiliently biased by spring arms 89 at either end of cross arm 87 of spring member (86), Fig. 9 (not shown). The brush comprises a transversely extending core (91) of a pair of twisted wires from which project helically arranged bristles 96 of a synthetic organic polymeric resin e.g. nylon. The brewing device includes a support frame 11 having a pair of opposing transversely spaced longitudinally extending vertical plates 12 which include tracks which support the cover member for movement between the advanced and retracted positions and a cam 53 and yoke 54 mounted on the support frame which move the brew cup between a depressed inverted position, Fig. 6 (not shown) and a raised upright position in engagement with the advanced cover member. Brew cup 37 is rotatably mounted on shaft 34 and communicates with the hollow section of the shaft by means of port 39. A bracket member (70) separably secured to the frame separably supports the brush member 90 and comprises longitudinally extending strips 66 releasably engaging the confronting faces of plates 12, and a crosspiece (71) connected to and extending between the strips, the brush 90 being separably supported by said crosspiece which comprises opposite legs(73) extending transversely to said strips, arms 74 projecting longitudinally from the inner ends of the legs and having recesses (78) releasably engaging the brush core, and a transverse cross arm 76 joining the ends of the longitudinal arms remote from the legs. Each recess (78) includes a vertically extending slot (79) closed at the top and vertically, slidably engaging the opposite end sections of the brush core, and spring arms 89 on latching spring member (86) engaging the underface of said core proximate the recesses and resiliently urging the core towards engagement with the upper ends of the slots, each slot (79) having an opening 80 which is normally closed by a spring arm 89, arms 89 being depressible to below the level of the tops of the opening to provide access to the slots 79 through the openings.