US3706349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Load cell
Assignee: Toroid Corp
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Filing: 1970-10-02
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Granted: 1972-12-19
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Expires: 1990-10-02
Abstract
Abstract A load cell consisting basically of three structural regions concentrically arranged, a central or hub region adapted to receive loading from a first direction, an outer tubular region adapted to receive opposite and equal loading and a web or diaphragm region interconnecting the central and outer regions, and wherein strain gauges are placed on the surface of the web region and respond to bending strain produced in the web region by load so applied.
Inventors
- 👤 Owen Paelian
- 👤 Donald R Rister
- 👤 Richard L Kellar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:56
CPC Classifications
G; G01; G01G; G01G3/00; G01G3/12; G01G3/14; G01G3/1402; G01G3/1404; G01G3/142
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
198 words
An electrical weighing apparatus comprising: A. a first base member adapted to receive and couple an external load to said weighing apparatus in a first direction; B. a second base member adapted to receive and couple an external load to said weighing apparatus in a second and opposite direction to that of said first external load; C. a strain producing assembly comprising: 1. a central cylindrical region adapted to receive a load applied concentrically therewith from said first base member, 2. an outer tubular region surrounding said central cylindrical region and adapted to receive a load applied concentrically therewith from said second base member, and 3. a web region interconnecting said outer and central regions, the opposite surfaces of said web regions forming with said central cylindrical region and said tubular region a pair of oppositely positioned, substantially identical, annular slots; D. a plurality of strain gauges uniformly spaced on a bottom surface of said web region; E. a first diaphragm connecting continuously between said outer and central regions between walls of one of said annular slots, and a second diaphragm connecting continuously between said outer and central regions between walls of the other of said annular slots.
Claim 2
Dependent Claim
198 words
An electrical weighing apparatus comprising: A. a first base member adapted to receive and couple an external load to said weighing apparatus in a first direction; B. a second base member adapted to receive and couple an external load to said weighing apparatus in a second and opposite direction to that of said first external load; C. a strain producing assembly comprising: 1. a central cylindrical region adapted to receive a load applied concentrically therewith from said first base member, 2. an outer tubular region surrounding said central cylindrical region and adapted to receive a load applied concentrically therewith from said second base member, and 3. a web region interconnecting said outer and central regions, the opposite surfaces of said web regions forming with said central cylindrical region and said tubular region a pair of oppositely positioned, substantially identical, annular slots; D. a plurality of strain gauges uniformly spaced on a bottom surface of said web region; E. a first diaphragm connecting continuously between said outer and central regions between walls of one of said annular slots, and a second diaphragm connecting continuously between said outer and central regions between walls of the other of said annular slots.
Claim 3
Dependent Claim
24 words
an outer tubular region surrounding said central cylindrical region and adapted to receive a load applied concentrically therewith from said second base member, and
Claim 4
Dependent Claim
24 words
an outer tubular region surrounding said central cylindrical region and adapted to receive a load applied concentrically therewith from said second base member, and
Claim 5
Dependent Claim
38 words
An electrical weighing apparatus as set forth in claim 1 wherein said first base member and said central cylindrical region comprise an integral structure and include means for attachment of said first base member to an external structure.
Claim 6
Dependent Claim
92 words
a web region interconnecting said outer and central regions, the opposite surfaces of said web regions forming with said central cylindrical region and said tubular region a pair of oppositely positioned, substantially identical, annular slots; D. a plurality of strain gauges uniformly spaced on a bottom surface of said web region; E. a first diaphragm connecting continuously between said outer and central regions between walls of one of said annular slots, and a second diaphragm connecting continuously between said outer and central regions between walls of the other of said annular slots.
Claim 7
Dependent Claim
92 words
a web region interconnecting said outer and central regions, the opposite surfaces of said web regions forming with said central cylindrical region and said tubular region a pair of oppositely positioned, substantially identical, annular slots; D. a plurality of strain gauges uniformly spaced on a bottom surface of said web region; E. a first diaphragm connecting continuously between said outer and central regions between walls of one of said annular slots, and a second diaphragm connecting continuously between said outer and central regions between walls of the other of said annular slots.
Claim 8
Dependent Claim
42 words
An electrical weighing apparatus as set forth in claim 1 further comprising connecting means connecting said second base member and said outer tubular region for restraining expansion transverse of said outer tubular region when a load is applied to said weighing apparatus.
Claim 9
Dependent Claim
34 words
An electrical weighing apparatus as set forth in claim 3 wherein said connecting means comprises lateral welds, welds connecting transverse to an applied load, between said outer tubular region and said second base member.
Claim 10
Dependent Claim
45 words
An electrical weighing apparatus as set forth in claim 3 wherein the bottoms of said annular slots of said web region include at least one substantially flat surface area and said strain gauges are applied to at least one of said substantially flat surface areas.
Claim 11
Dependent Claim
50 words
An electrical weighing apparatus as set forth in claim 3 wherein a said slot is of increasing depth toward its annular center, measured radially, and each said strain gauge is attached to a bottom surface area of a said slot which is substantially on one side of said annular center.
Claim 12
Dependent Claim
27 words
An electrical weighing apparatus as set forth in claim 5 wherein said strain gauges are placed adjacent to an edge of a said substantially flat surface area.
Claim 13
Dependent Claim
43 words
An electrical weighing apparatus as set forth in claim 7 wherein said plurality of strain gauges comprise at least two said strain gauges positioned adjacent an inner said edge and at least two said strain gauges are positioned adjacent aN outer said edge.
Claim 14
Dependent Claim
33 words
An electrical weighing apparatus as set forth in claim 7 wherein said plurality of strain gauges comprise at least two strain gauges positioned adjacent an outer said edge of each of said slots.
Claim 15
Dependent Claim
34 words
An electrical weighing apparatus as set forth in claim 7 wherein said plurality of strain gauges comprise at least two said strain gauges positioned adjacent an inner said edge of each of said slots.
Claim 16
Dependent Claim
52 words
An electrical weighing apparatus as set forth in claim 7 wherein said plurality of strain gauges comprises at least two said strain gauges positioned adjacent an outer said edge of each of said slots and at least two said strain gauges positioned adjacent an inner said edge of each of said slots.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |