(57) A delivery cock for containers for the treatment of pasty and/or liquid substances,
comprising an arcuate tubular body member (2) communicating at one end with the bottom
(101) of the container (1) associated therewith and provided, in proximity of the
other end, with a radial hole (202) directed downwards, and a valve member cooperating
with said tubular body member (201) and comprising a disc-shaped valve member (3)
having an outer diameter corresponding to the inner diameter of said tubular body
member (201) and means (6,7,9,10) controlling and regulating said valve member to
releasably lock said valve member in a first closure position flush with the end of
said tubular body member communicating with the bottom of the container; in a second
position flush with the other end of said tubular body member downstream of said radial
hole; and in a third position wherein the valve member is completely withdrawn from
said tubular body member.
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