(57) A dispenser for viscous liquid or semi-liquid materials comprising a container (12)
for the material and an upright hollow stationary cylinder (36) within the container
(12) operatively closed at its bottom end (46), an intake opening (42) in the side
of the cylinder (36) disposed upwardly from but adjacent said bottom end (40) and
an elevated discharge opening (44) in the side of the cylinder (36) disposed upwardly
from said intake opening (42), a sleeve (46) slideably mounted within the cylinder
(36) having a lowered position and a raised position and constructed in said lowered
position to close off the intake opening (42) and open up the elevated discharge opening
(44) and in said raised position to open said intake opening (42) and to close off
said elevated discharge opening (44), a vertically reciprocatable piston and rod assembly
(60) including a piston (62) disposed within the cylinder (36) shiftable between lowered
and raised positions disposed above said elevated discharge opening (44), and friction
means (70, 72) interposed between the assembly (60) and sleeve (46) for producing
movement of the sleeve (46) between its lowered and raised positions with shifting
of the piston (62) between lowered and raised positions.
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