Patent US2851272A successfully refreshed from Google Patents.
Patent US4029163A successfully refreshed from Google Patents.
US4029163A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weighing apparatus
Assignee: US Filter Wallace and Tiernan Inc
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Filing: 1976-05-28
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Granted: 1977-06-14
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Expires: 1996-05-28
Abstract
Abstract Apparatus for weighing a continuous flow of powder material, including two separate weighing hoppers, a diverting valve for switching the flow from one hopper to the other and a closure valve for emptying each hopper. Each hopper is supported for small vertical movements by a suspension system including two pairs of crossed flexible wires at upper and lower levels, with the intersections of the wires lying on a vertical axis through a load cell which thus senses the gross weight of the hopper and its load. An automatic controller with a register totals the successive recorded gross or live weights of the hoppers and subtracts successive readings of the tare weights.
Inventors
- 👤 Clifford Edwin Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:48
CPC Classifications
G; G01; G01G; G01G13/00; G01G13/24; G01G13/242; G01G21/00; G01G21/24
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
124 words
Apparatus for weighing materials, comprising a hopper with an inlet opening at its upper end, and a controlled outlet opening at its lower end, means for supporting said hopper to permit limited vertical movement thereof, comprising an upper flexible tension element extending horizontally in one direction from a point on the hopper adjacent the upper end thereof, to a fixed point at the same level, and a lower flexible tension element extending horizontally in another generally opposite direction from a point on the hopper adjacent the lower end thereof to a fixed point at the same level, and an electro-mechanical transducer for sensing the weight of the hopper, situated at a position offset laterally from a vertical line through the centre of the hopper.
Claim 2
Dependent Claim
124 words
Apparatus for weighing materials, comprising a hopper with an inlet opening at its upper end, and a controlled outlet opening at its lower end, means for supporting said hopper to permit limited vertical movement thereof, comprising an upper flexible tension element extending horizontally in one direction from a point on the hopper adjacent the upper end thereof, to a fixed point at the same level, and a lower flexible tension element extending horizontally in another generally opposite direction from a point on the hopper adjacent the lower end thereof to a fixed point at the same level, and an electro-mechanical transducer for sensing the weight of the hopper, situated at a position offset laterally from a vertical line through the centre of the hopper.
Claim 3
Dependent Claim
17 words
Apparatus according to claim 1, in which said transducer is offset to one side of the hopper.
Claim 4
Dependent Claim
27 words
Apparatus according to claim 1, including a further horizontal tension member arranged to prevent or limit rotary or twisting movements of said hopper about a vertical axis.
Claim 5
Dependent Claim
28 words
Apparatus according to claim 1, including means for adjusting the effective length of one or each tension member, and/or the vertical position of one or both ends thereof.
Claim 6
Dependent Claim
18 words
Apparatus according to claim 1, including a pair of flexible tension members at the upper and lower levels.
Claim 7
Dependent Claim
21 words
Appartus according to claim 5, in which the two members of each pair extend in non-parallel directions as seen in plan.
Claim 8
Dependent Claim
32 words
Apparatus according to claim 6, in which the said two tension members of one or both pairs cross, or intersect extended, adjacent to a point on a vertical line through said transducer.
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) | 1980-06-13 | 1980-12-13 | 1981-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-13 | 1984-12-13 | 1985-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-13 | 1988-12-13 | 1989-06-14 | $7700.00 | Window Closed / Lapsed |