U.S. Patent Oct. 1, 1991 Sheet 2 of 3 5,052,909 cm N EQT TO 57 _‘ TO cuscx l VALVE 49 II I I l ‘a; I I I I I l I I l I I Jl I I t-Y-n- 4-! -J I I I l l L_________‘________ 1...- ....__.._________.._.__ RESERVOIR 230 FIG. 3 I354 FIG.2
