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US 5,271,528 AGranted
Automatic grease dispenser
AssigneeHornche Trading Co., Ltd.
InventorHui-Mei Chien
Life of this patent
Estimating the term…
Abstract
An automatic grease dispenser using a motor to drive a rotary shaft via a reduction gear set for displacing a pusher downward to squeezing a grease out of a grease pack through an outlet in constant quantity at fixed intervals, and having a positioning element inserted to an longitudinal groove on a piston rod of the pusher to permit only vertical movement but prevent from rotation of the pusher following rotation of the rotary shaft.
Claims2
An automatic grease dispenser comprising mainly
- a body containing a circuit board and a current transformer or a set of batteries;
- a base made of transparent material threaded to the bottom of the body for holding of a grease pack, and having an grease outlet at the lower side;
- a motor with an output shaft engaging with an output gear;
- a reduction gear set having a first and last gear the first gear engaging with said output gear;
- a rotary shaft having an upper and lower end with a shank at the upper end connect to a transmission gear engaging with the last gear of the reduction gear set, and a threaded section at the lower end;
- and
- a pusher composed of a piston and a piston rod, in which the piston rod is extended upward from the center of the piston and having an axial hole with a upper section having inner thread for connecting to the threaded section of the said rotary shaft;
- whereby grease can be squeezed out from the grease pack through the outlet intermittently in a constant quantity and at a constant interval set up at the circuit board by operation of the motor to drive the rotary shaft and then the pusher to squeeze the grease pack.
5 more elements
Dependencies are inferred from the claim text.