Patent ID: 6416295
Filing Date: 2002-07-09
Classification: F04F

Abstract:
A vacuum-generating unit comprising:a main body section provided with a pressure fluid supply port connected to a pressure fluid supply source, a vacuum port connected to a suction means, and a discharge port for discharging, to the outside, a pressure fluid supplied from said pressure fluid supply port, wherein said main body section is composed of a first block, a second block, a third block and a fourth block which are connected end-to-end and joined in series in a longitudinal direction and each of which is formed to have a flat thin-walled configuration, and said first block, said second block, said third block, and said fourth block are formed to have a substantially identical widthwise dimension respectively; an ejector section for generating a negative pressure in accordance with an action of said pressure fluid supplied from said pressure fluid supply port; and a solenoid-operated valve section and a detecting section carried on said main body section, wherein: a passage communicating with said pressure fluid supply port extending through said first and second blocks, a passage communicating with said vacuum port extending through said second and third blocks, and a passage communicating with an air discharge port extending through said first and second blocks for a solenoid-operated valve are arranged substantially in parallel respectively.