Liquid dispensing system and automatic selector therefor
作者： Ezra Dale Hartley , Frederick Scott Hartley
DOI:
关键词:
摘要: A reciprocable device comprising a member (17) mounted for reciprocating movement within chamber (15) and valve system (43,47) controlling the supply of fluid under pressure to bring about reciprocation such member. Bistable spring means are enabled by operate whereby at least some force driving (43, 47) is obtained from bistable not (17).
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