Patent ID: 8171784
Filing Date: 2012-05-08
Classification: F17C,G01F,G01G

Abstract:
1. A gas cylinder residual gas volume indicator, comprising: a carrier, a hydraulic cylinder, a meter, and an oil pipe, wherein said carrier comprises a pivoted hook member, said pivoted hook member comprising a transverse arm and a vertical arm connected at right angle, said transverse arm having a front end forming a weight-receiving part for receiving the weight of a gas cylinder and said vertical arm having one side forming a pressure-applying part for moving the hydraulic cylinder according to the weight received by said weight-receiving part; said hydraulic cylinder comprises a cylinder body holding a hydraulic fluid and a cylinder piston stopped against said pressure-applying part of said carrier and movable by said pressure-applying part relative to said cylinder body to impart a pressure to said hydraulic fluid; said meter is a hydraulic mechanical type meter having an index rotatable by the hydraulic fluid of said hydraulic cylinder; and said oil pipe is connected between said hydraulic cylinder and said meter for guiding said hydraulic fluid out of said hydraulic cylinder body into said meter to rotate said index.