Title:
FLUID TRICKLING PUMP
Document Type and Number:
Japanese Patent JPS56132481
Kind Code:
A
Abstract:
A fluid dispensing pump includes a pump plunger mounted for reciprocation in a pump cylinder, the plunger having a discharge passage extending therethrough and communicating with a discharge opening in a discharge head connected with the plunger which sealingly engages a retaining collar on a container closure during a lock-down position of the discharge head. A check valve in the discharge passage includes a cage surrounding a valve opening, and a lower end of the plunger sealingly engages a portion of the cage when in the lock-down position. The piston is arranged on the plunger to form an air space so as to prevent any hydraulic lock which would interfere with a full depression of the head into its lock-down position. The sealed locking engagement between the head and the retaining collar is capable of being unlocked by the provision of axially oriented unlocking cam faces for effecting disengagement upon relative rotation between the head and the collar.
Inventors:
DAGURASU EFU KOOSETSUTO
Application Number:
JP2365081A
Publication Date:
October 16, 1981
Filing Date:
February 19, 1981
Export Citation:
Assignee:
DIAMOND INT CORP
International Classes:
B05B11/00; F04B9/14; F04B19/22; (IPC1-7): F04B19/22