Battery-operated grease gun with an electronic pressure...

Details Battery-operated grease gun with an electronic pressure... Battery-operated grease gun with an electronic pressure...

2006-04-25

2006-04-25

Fenstermacher, David (Department: 3682)

Lubrication

Lubricators

Refilling device

C184S105100, C222S333000, C222S263000

Reexamination Certificate

active

07032713

ABSTRACT:
A battery operated grease gun has a motor that drives a planetary gear assembly that is coupled to a pump assembly that drives a plunger reciprocally in an grease passage to discharge grease through a discharge spout. The pressure in the grease exerts a reaction force on the plunger that will change torque of the motor. The change of the torque of the motor will simultaneously effect voltage applied to the motor. When the voltage in the motor changes, an electronic pressure regulator measures the voltage in the motor to determine the pressure in the grease in the grease passage and stops the motor as the pressure in the grease reaches preset given valves in the pressure regulating device.

REFERENCES:
patent: 5105912 (1992-04-01), Heister
patent: 5609274 (1997-03-01), Shih et al.
patent: 2004/0226969 (2004-11-01), Shew

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