초록 ▼

A dispensing device of the hand-help pump type has an internal piston which is pulled up by a rod passing through the piston, which rod is moved by an actuator. When the contents of the piston are emptied, in order to attach a refill, a dog release mechanism operates to release the dogs which, in no

A dispensing device of the hand-help pump type has an internal piston which is pulled up by a rod passing through the piston, which rod is moved by an actuator. When the contents of the piston are emptied, in order to attach a refill, a dog release mechanism operates to release the dogs which, in normal use when the device is full, function to prevent the piston from being drawn downwardly so that the piston can be removed to allow attachment of the refill which has a new piston.

대표청구항 ▼

A dispensing device having a body, a head attached to the body, a piston, a rod passing through the piston, actuator means for pulling the piston up toward the head, flexible means for engaging the rod to prevent the piston from downward movement when the device has contents remaining in it, and mea

A dispensing device having a body, a head attached to the body, a piston, a rod passing through the piston, actuator means for pulling the piston up toward the head, flexible means for engaging the rod to prevent the piston from downward movement when the device has contents remaining in it, and means for moving the flexible means out of engagement when the piston reaches its uppermost point of travel, said means for moving the flexible means comprising said body having an internal shoulder neat its upper end, and said moving means further comprises said piston surrounding a collar, said collar disposed for movement in the piston in a downward direction when said collar engages said internal shoulder to release the flexible means from the rod.