Weighing scales – Self-positioning – Fluid transmission to pressure gauge
Patent
1988-12-08
1989-08-01
Miller, Jr., George H.
Weighing scales
Self-positioning
Fluid transmission to pressure gauge
7386258, 92 34, 92 42, G01G 504, G01L 102, F01B 1900, F16J 300
Patent
active
048526754
ABSTRACT:
A scale utilizing an oil pressure gauge for displaying the measured weight is disclosed. In the scale, there is an apparatus for intermediate transmission of sensed pressure representing the weight applied on the scale. The apparatus includes a bellows-shaped envelope having an open end and a sealed end and forming a chamber therein for containing hydraulic oil, a base member connected to the open end of the envelope and an air leakage member positioned on the sealed end of the envelope. There is an oil passage formed in the base member to enable the hydraulic oil in the envelope to flow out. An annular clamp is used for the connection of the base member and the envelope. A knob is connected to the air leakage member to block the air passage. The apparatus for intermediate transmission of sensed pressure may further include a plurality of rigid metal retainers outside of the envelope for preventing the same from overly deforming in a radial direction.
REFERENCES:
patent: 1382081 (1921-06-01), Heiliger
patent: 3162335 (1964-12-01), Kogan et al.
patent: 4002216 (1977-01-01), Solow
patent: 4219090 (1980-08-01), Dayton
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