US3742760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Load transducer
Assignee: Toyoda Koki KK
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Filing: 1972-08-01
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Granted: 1973-07-03
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Expires: 1992-08-01
Abstract
Abstract A load transducer comprises a strain column having an axial bore therein and a pair of strain gauges, one of which is fastened on one end of the strain column across the open axial bore and the other of which is bonded on the inner cylindrical surface of the bore being disposed in the axial direction therein. The strain gauges are fabricated into an electrical bridge circuit together with other electrical resistance means. Upon application of an axial load to the strain column, the strain gauges are strained in accordance with Poisson''s ratio, whereby the axial load is measured with high accuracy and high sensitivity.
Inventors
- 👤 Y Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:15
CPC Classifications
G; G01; G01L; G01L9/00; G01L9/0001; G01L9/0002; G01L1/00; G01L1/20; G01L1/22; G01L1/2206; G01L1/2218
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
62 words
A load transducer comprising: a housing; a strain column mounted on said housing at one end thereof and having an axial hollow therein; first strain gauge means radially secured on the other end of said strain column across said axial hollow; and load receiving means mounted on said other end of said strin column for axially transmitting load to said strain column.
Claim 2
Dependent Claim
62 words
A load transducer comprising: a housing; a strain column mounted on said housing at one end thereof and having an axial hollow therein; first strain gauge means radially secured on the other end of said strain column across said axial hollow; and load receiving means mounted on said other end of said strin column for axially transmitting load to said strain column.
Claim 3
Dependent Claim
40 words
A load transducer according to claim 1, further comprising second strain gauge means axially fixed on the cylindrical surface of said axial hollow in said strain column, said first and second strain gauge means being connected in a bridge circuit.
Claim 4
Dependent Claim
36 words
A load transducer according to claim 2, wherein said strain column is provided with a first annular recess formed at a position thereon axially corresponding to the place where said second strain gauge means is fixed.
Claim 5
Dependent Claim
32 words
A load transducer according to claim 3, wherein said strain column is provided with a second annular recess formed between said first annular recess and said one end of said strain column.
Claim 6
Dependent Claim
60 words
A load transducer according to claim 4, further comprising a load transmitting means having a pressure receiving surface of predetermined area at one end thereof for receiving pressure as a load from a pressure applying zone, and being in contact with said load receiving means at the other end thereof for axially transmitting the load to said load receiving means.
Claim 7
Dependent Claim
60 words
A load transducer according to claim 1, further comprising a load transmitting means having a pressure receiving surface of predetermined area at one end thereof for receiving pressure as a load from a pressure applying zone, and being in contact with said load receiving means at the other end thereof for axially transmitting the load to said load receiving means.
Claim 8
Dependent Claim
138 words
A load transducer comprising: a housing; a strain column mounted on said housing at one end thereof and having an axial hollow therein; first strain gauge means provided across said axial hollow on the other end of said strain column with one end of said first strain gauge means being fixed on the said other end of said strain column and the other end of said first strain gauge means being fixed on the diametrically opposite portion of said other end of said strain column; load receiving means mounted on said other end of said strain column for axially transmitting load to said strain column; and second strain gauge means axially fixed on the cylindrical surface Of said axial hollow in said strain column, said first and said second strain gauge means being connected in a bridge circuit.
Claim 9
Dependent Claim
138 words
A load transducer comprising: a housing; a strain column mounted on said housing at one end thereof and having an axial hollow therein; first strain gauge means provided across said axial hollow on the other end of said strain column with one end of said first strain gauge means being fixed on the said other end of said strain column and the other end of said first strain gauge means being fixed on the diametrically opposite portion of said other end of said strain column; load receiving means mounted on said other end of said strain column for axially transmitting load to said strain column; and second strain gauge means axially fixed on the cylindrical surface Of said axial hollow in said strain column, said first and said second strain gauge means being connected in a bridge circuit.
Claim 10
Dependent Claim
138 words
A load transducer for measuring compacting pressure in a powder compacting press, comprising : a housing securedly mounted in a punch means of said powder compacting press; a strain column mounted on said housing at one end thereof, said strain column having an axial hollow extending therethrough; strain gauge means radially secured on the other end of said strain column across said axial hollow; load receiving means mounted on said other end of said strain column; and load transmitting means slidably mounted in said punch means, said load transmitting means having a pressure receiving surface exposed to a pressure applying zone at one end thereof for receiving compacting pressure as a load, and another end of said load transmitting means being in contact with said load receiving means for axially transmitting the load to said load receiving means.
Claim 11
Dependent Claim
138 words
A load transducer for measuring compacting pressure in a powder compacting press, comprising : a housing securedly mounted in a punch means of said powder compacting press; a strain column mounted on said housing at one end thereof, said strain column having an axial hollow extending therethrough; strain gauge means radially secured on the other end of said strain column across said axial hollow; load receiving means mounted on said other end of said strain column; and load transmitting means slidably mounted in said punch means, said load transmitting means having a pressure receiving surface exposed to a pressure applying zone at one end thereof for receiving compacting pressure as a load, and another end of said load transmitting means being in contact with said load receiving means for axially transmitting the load to said load receiving means.
Claim 12
Dependent Claim
47 words
A load transducer according to claim 8, further comprising: strain gauge means axially bonded on the cylindrical surface of said axial hollow in said strain column; and bridge circuit means having said radial strain gauge means and said axial strain gauge means connected in adjacent arms thereof.
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) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |