Method and apparatus for dispensing multiple-component flowable substances

An apparatus comprising:

• a housing, said housing defining a first fluid passage from an inlet to an outlet;
• said first fluid passage including a first portion and a second portion, said first portion intersecting said second portion at an acute angle with respect to the longitudinal axes of said first and second portions;
• and
• said housing further defining a second fluid passage from an inlet to an outlet, said second fluid passage intersecting said second portion of said first fluid passage adjacent said first portion, said second portion having a substantially uniform cross-sectional area adjacent said outlet of said second fluid passage such that fluid flowing through said first passage draws fluid in said second passage into said first passage.

An apparatus comprising:

• a housing, said housing defining a first fluid passage from an inlet to an outlet;
• said first fluid passage including a first portion and a second portion, said first portion intersecting said second portion at an acute angle with respect to the longitudinal axes of said first and second portions;
• said housing further defining a second fluid passage from an inlet to an outlet, said second fluid passage intersecting said second portion of said first fluid passage adjacent said first portion, said second portion having a substantially uniform cross-sectional area adjacent said outlet of said second passage such that fluid flowing through said first passage draws fluid in said second passage into said second portion of said first passage;
• and
• said first and second portions of said passage being arranged such that the ratio of fluid flowing through said second passage and fluid flowing through said first passage is as low as approximately 1:3.

An apparatus comprising:

• a housing having first and second inlets and a first outlet;
• the first inlet supplying a first fluid to the apparatus;
• the second inlet supplying a second fluid to the apparatus;
• and
• the housing defining a passage in fluid communication with the first and second inlets and the first outlet, the passage including an upstream portion, a connecting portion and a downstream portion, the connecting portion intersecting the downstream portion at an acute angle with respect to the longitudinal axes of said connecting portion and said downstream portion, said downstream portion having a substantially uniform cross-sectional area adjacent said intersection of said connecting portion and the downstream portion having a smaller cross-sectional area than the upstream portion, the second inlet being in communication with the downstream portion, so that second fluid is siphoned into the downstream portion and mixed with first fluid supplied through the upstream portion to provide a fluid mixture, the fluid mixture being conveyed in the downstream portion to the first outlet.