Patent US3582691A successfully refreshed from Google Patents.
US3582691A
Expired / Lapsed
US
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Force transducer units with multiple sensing elements
Assignee: Kistler Instrumente AG
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Filing: 1969-07-30
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Granted: 1971-06-01
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Expires: 1989-07-30
Abstract
Abstract A transducer unit in which the force or forces to be measured, are divided at a predetermined ratio by the use of at least one piezoelement and at least one idle element, of substantially similar thicknesses and characteristics, which are disposed between the force-transmitting supports.
Inventors
- 👤 Hans Conrad Sonderegger
- 👤 Karlheinz Martini
- 👤 Gelli Spescha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:35
CPC Classifications
G; G01; G01L; G01L1/00; G01L1/16; G01L5/00; G01L5/16; G01L5/167; Y; Y10; Y10S; Y10S73/00; Y10S73/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
84 words
A force transducer unit comprising: a pair of force transmitting members; a plurality of piezoelements arranged mechanically in parallel and having their respective axes of sensitivity disposed in different directions; and means for receiving a predetermined portion of the total force applied to said transducer including a plurality of idle elements having dimensions equivalent to the dimensions of said piezoelements and being loaded mechanically in parallel; and wherein said plurality of piezoelements and said plurality of idle elements are arranged between said force-transmitting members.
Claim 2
Dependent Claim
84 words
A force transducer unit comprising: a pair of force transmitting members; a plurality of piezoelements arranged mechanically in parallel and having their respective axes of sensitivity disposed in different directions; and means for receiving a predetermined portion of the total force applied to said transducer including a plurality of idle elements having dimensions equivalent to the dimensions of said piezoelements and being loaded mechanically in parallel; and wherein said plurality of piezoelements and said plurality of idle elements are arranged between said force-transmitting members.
Claim 3
Dependent Claim
51 words
A force transducer unit according to claim 1, further including an insulator having metallized conductor paths disposed adjacent thereto for transmitting signals from said piezoelements to connection terminals arranged on the outer periphery of said transducer, and wherein said insulator is located next to said elements and between said force-transmitting members.
Claim 4
Dependent Claim
21 words
A force transducer unit according to claim 1, wherein said idle elements consist of the same crystal material as said piezoelements.
Claim 5
Dependent Claim
30 words
A force transducer unit according to claim 1, wherein said idle elements consist of a material which has approximately the same resilience properties and coefficient of expansion as said piezoelement.
Claim 6
Dependent Claim
46 words
A force transducer unit according to claim 1, wherein said piezoelements and said idle elements are disposed within a spacer plate having the same stiffness as said elements and wherein the adjacent surfaces of said spacer plate and said elements are located in the same plane.
Claim 7
Dependent Claim
42 words
A force transducer unit according to claim 5, further including an insulator having metallized conductor strips printed thereon, upon which said spacer plate rests, and wherein said spacer plate further includes grooves therein for receiving said conductor strips while avoiding contact therewith.
Claim 8
Dependent Claim
15 words
A force transducer unit according to claim 6, wherein said piezoelements consist of piezoelectric crystals.
Claim 9
Dependent Claim
15 words
A force transducer unit according to claim 6, wherein said piezoelements consist of piezoresistant material.
Claim 10
Dependent Claim
18 words
A force transducer unit according to claim 1, wherein said axes of sensitivity are orthogonal to one another.
Claim 11
Dependent Claim
22 words
A force transducer unit according to claim 1, wherein said different axes of sensitivity correspond to orthogonally directed shear and compressional forces.
References Cited (Backward Citations)
US2545101A
Cited
US2875352A
Cited
US3043967A
Cited
US3151258A
Cited
US3222919A
Cited
US3149488A
Cited
US3320582A
Cited
US3274539A
Cited
US3453458A
Cited
US3460061A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |