Patent US5170856A successfully refreshed from Google Patents.
US5170856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weighing scale with fluid pressure transmission means
Assignee: Individual
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Filing: 1991-08-29
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Granted: 1992-12-15
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Expires: 2011-08-29
Abstract
Abstract A weighing scale of the type comprising a scale is disclosed wherein the weighing scale is table for bearing the thing to be measured; a first hydraulic cylinder disposed below the scale table; a feeler transmitting the pressure applied at the scale table to the first hydraulic cylinder; a second hydraulic cylinder connected to the first hydraulic cylinder by a pipe and disposed at a level below the first hydraulic cylinder to bear the pressure transmitted through the feeler; a probe forced to make a linear displacement corresponding to the amount of the pressure transmitted from the first hydraulic cylinder to said second hydraulic cylinder; and an electronic inductor to detect the range of the linear displacement and convert it into a corresponding digital data for display.
Inventors
- 👤 Li-Hsiang Yang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:16
CPC Classifications
G; G01; G01G; G01G5/00; G01G5/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
151 words
A weighing scale comprising: a scale table for bearing an object to be measured; a plurality of Z-bars supporting said scale table at corners thereof; a first hydraulic cylinder disposed below said scale table; a feeler disposed between said scale table and said first hydraulic cylinder for transmitting pressure applied at said scale table to said first hydraulic cylinder; a second hydraulic cylinder connected to said first hydraulic cylinder by a pipe, said second hydraulic cylinder being disposed at a level below said first hydraulic cylinder to bear the pressure being tranmitted through said pipe as sensed by said feeler; a probe forced to make a linear displacement corresponding to an amount of the pressure transmitted from said hydraulic cylinder to said second hydraulic cylinder; and electronic inductor means to detect a range of the linear displacement of said probe and convert said displacement into a corresponding digital data for display.
Claim 2
Dependent Claim
151 words
A weighing scale comprising: a scale table for bearing an object to be measured; a plurality of Z-bars supporting said scale table at corners thereof; a first hydraulic cylinder disposed below said scale table; a feeler disposed between said scale table and said first hydraulic cylinder for transmitting pressure applied at said scale table to said first hydraulic cylinder; a second hydraulic cylinder connected to said first hydraulic cylinder by a pipe, said second hydraulic cylinder being disposed at a level below said first hydraulic cylinder to bear the pressure being tranmitted through said pipe as sensed by said feeler; a probe forced to make a linear displacement corresponding to an amount of the pressure transmitted from said hydraulic cylinder to said second hydraulic cylinder; and electronic inductor means to detect a range of the linear displacement of said probe and convert said displacement into a corresponding digital data for display.
Claim 3
Dependent Claim
63 words
The weighing scale of claim 1, wherein each of said first and second hydraulic cylinders is comprised of a cylindrical container, a cover plate covered on said cylindrical container at a top thereof, and a gasket retained between said cover plate and said cylindrical container, said gasket having a circular diaphragm at a center thereof for holding said feeler or said probe respectively.
References Cited (Backward Citations)
US2639613A
Cited
US3261203A
Cited
US4184555A
Cited
US4360071A
Cited
US4456084A
Cited
US4537266A
Cited
US4569407A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-12-15 | 1996-06-15 | 1996-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-15 | 2000-06-15 | 2000-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-15 | 2004-06-15 | 2004-12-15 | $7700.00 | Window Closed / Lapsed |