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US4632198A
Expired / Lapsed
US
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Multi-range load cell weighing instrument
Assignee: Toshiba TEC Corp
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Filing: 1985-10-11
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Granted: 1986-12-30
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Expires: 2005-10-11
Abstract
Abstract An improvement in a multi-range load cell weighing instrument of the type which has a plurality of load cells including a high weighing load cell positioned adjacent a base and a low weighing load cell positioned adjacent a tray. In the improved weighing instrument according to the invention, the load cells are located such that the center lines along the length thereof substantially coincide with the center line of the tray. Accordingly, if a partial load condition is entered wherein a load is put aside relative to the tray, a force acting to twist the load cells is weakened, resulting in reduction of the frequency of causing flickering of indication. The weighing instrument further comprises a center stopper located on a tray frame for contacting with the load cells within a range of a predetermined fixed distance in a direction perpendicular to the length of the load cells in order to prevent swinging motions of the tray in a direction for which the load cells are relatively weak to further prevent flickering of indication and also to effectively prevent an overload from being applied to the low weighing load cell.
Inventors
- 👤 Mitsuo Uchimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:08
CPC Classifications
G; G01; G01G; G01G19/00; G01G19/22; G01G19/24; G01G19/30; G01G21/00; G01G21/24; G01G23/00; G01G23/005; G01G3/00; G01G3/12; G01G3/14; G01G3/1402; G01G3/1412
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
175 words
In a multi-range load cell weighing instrument of the type which has two load cells including a high weighing load cell positioned adjacent a base and a low weighing load cell positioned adjacent a tray, the improvement wherein said load cells are located substantially at a same height and in an opposing relationship relative to each other such that the center lines along the length thereof substantially coincide with the center line of said tray, and wherein it comprises an upper base mounted in an opposing relationship to said tray on said low weighing load cell, the other end of said upper base being connected to said high weighing load cell, a tray frame directly connected to said low weighing load cell on which said tray is placed, and a center stopper located at a position of said tray frame opposed to and a short distance from said high weighing load cell so that said load cells are contacted when weight is received by said tray causing said center stopper to move said short distance.
Claim 2
Dependent Claim
175 words
In a multi-range load cell weighing instrument of the type which has two load cells including a high weighing load cell positioned adjacent a base and a low weighing load cell positioned adjacent a tray, the improvement wherein said load cells are located substantially at a same height and in an opposing relationship relative to each other such that the center lines along the length thereof substantially coincide with the center line of said tray, and wherein it comprises an upper base mounted in an opposing relationship to said tray on said low weighing load cell, the other end of said upper base being connected to said high weighing load cell, a tray frame directly connected to said low weighing load cell on which said tray is placed, and a center stopper located at a position of said tray frame opposed to and a short distance from said high weighing load cell so that said load cells are contacted when weight is received by said tray causing said center stopper to move said short distance.
Claim 3
Dependent Claim
19 words
A multi-range load cell weighing instrument according to claim 1, wherein said tray frame is formed in an X-shape.
Claim 4
Dependent Claim
34 words
A multi-range load cell weighing instrument according to claim 1, wherein said center stopper is located in an opposing relationship to a connecting portion of said upper base to said high weighing load cell.
Claim 5
Dependent Claim
211 words
In a multi-range load cell weighing instrument of the type which has two load cells including a high weighing load cell positioned adjacent a base and a low weighing load cell positioned adjacent a tray, the improvement wherein said load cells are located substantially at a same height and in an opposing relationship relative to each other such that the center lines along the length thereof substantially coincide with the center line of said tray, and wherein it comprises an upper base mounted in an opposing relationship to said tray on said low weighing load cell, the other end of said upper base being connected to said high weighing load cell, a tray frame directly connected to said low weighing load cell on which said tray is placed, four corner stoppers located at four corners of said tray frame and adapted to contact with said upper base when a load higher than a rated maximum level of said low weighing load cell is applied, and a center stopper located at a position of said tray frame opposed to and a short distance from said high weighing load cell so that said load cells are contacted when weight is received by said tray causing said center stopper to move said short distance.
Claim 6
Dependent Claim
211 words
In a multi-range load cell weighing instrument of the type which has two load cells including a high weighing load cell positioned adjacent a base and a low weighing load cell positioned adjacent a tray, the improvement wherein said load cells are located substantially at a same height and in an opposing relationship relative to each other such that the center lines along the length thereof substantially coincide with the center line of said tray, and wherein it comprises an upper base mounted in an opposing relationship to said tray on said low weighing load cell, the other end of said upper base being connected to said high weighing load cell, a tray frame directly connected to said low weighing load cell on which said tray is placed, four corner stoppers located at four corners of said tray frame and adapted to contact with said upper base when a load higher than a rated maximum level of said low weighing load cell is applied, and a center stopper located at a position of said tray frame opposed to and a short distance from said high weighing load cell so that said load cells are contacted when weight is received by said tray causing said center stopper to move said short distance.
Claim 7
Dependent Claim
36 words
A multi-range load cell weighing instrument according to claim 4, wherein said tray frame is formed in an X-shape, and said four corner stoppers are mounted at ends of four legs of said X-shaped tray frame.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-29 | 1990-06-30 | 1990-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-29 | 1994-06-30 | 1994-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-29 | 1998-06-30 | 1998-12-30 | $7700.00 | Window Closed / Lapsed |