Patent US4763534A successfully refreshed from Google Patents.
US4763534A
Expired / Lapsed
US
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Pressure sensing device
Assignee: Individual
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Filing: 1985-01-31
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Granted: 1988-08-16
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Expires: 2005-01-31
Abstract
Abstract A pressure sensing device utilizing force transducer ink comprises a resistive region deposited between a first and a second conducting region on a first insulating material, the resistive region electrically coupling the two conducting regions. On a second insulating material, a conducting region is deposited and a layer of force transducer ink is deposited over the conducting region. The two insulating materials are positioned in such a manner that the pressure transducer ink is in contact with the resistive region and separates the resistive and coupled conducting regions from the conducting region. A determination of the force applied to this configuration can be made by measuring the resistance between the first and second conducting regions. According to a second embodiment, a second resistive region and coupled conducting regions replace the conducting region on the second insulating material. By orienting the two resistive conducting element configuration, a position of a force applied to the pressure sensing device can be determined as well as the strength of the force.
Inventors
- 👤 Robert J. Hager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:50
CPC Classifications
G; G01; G01L; G01L1/00; G01L1/20
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
69 words
A pressure sensing device comprising: a first and a second electrode; a resistive region electrically coupled to said first and said second electrode; a conducting region; a layer of force transducer ink separating said conducting region from said resistive region and; means for measuring a change in an electrical parameter between said first and second electrodes to determine a value of force, when pressure is applied to said regions.
Claim 2
Dependent Claim
69 words
A pressure sensing device comprising: a first and a second electrode; a resistive region electrically coupled to said first and said second electrode; a conducting region; a layer of force transducer ink separating said conducting region from said resistive region and; means for measuring a change in an electrical parameter between said first and second electrodes to determine a value of force, when pressure is applied to said regions.
Claim 3
Dependent Claim
42 words
The pressure sensing device of claim 1 wherein said first and said second electrodes and said resistive region are deposited on a first insulating material; and wherein said conducting region and said force transducing ink are deposited on a second insulating material.
Claim 4
Independent Claim
64 words
The method of sensing pressure comprising the steps of: depositing a resistive region on insulating material; coupling conducting electrodes to said resistive region; providing a conducting region overlying said resistive region; separating said resistive region from said conducting region by a region of force transducer ink; and measuring a change in resistive value between said conducting electrodes when pressure is applied to said regions.
Claim 5
Independent Claim
64 words
The method of sensing pressure comprising the steps of: depositing a resistive region on insulating material; coupling conducting electrodes to said resistive region; providing a conducting region overlying said resistive region; separating said resistive region from said conducting region by a region of force transducer ink; and measuring a change in resistive value between said conducting electrodes when pressure is applied to said regions.
Claim 6
Dependent Claim
31 words
The method of sensing pressure of claim 3 further comprising the step of calibrating said change in resistive value with a known force to provide a quantitive measure of applied pressure.
Claim 7
Dependent Claim
95 words
A pressure sensing device comprising: a first insulating material; a second insulating material; a conducting layer in contact with an inner surface of said first insulating material; a layer of force transducer ink in contact with said conducting layer; a resistive element in contact with said force transducer ink layer and said second insulating material, said resistive element having a plurality of conducting regions coupled thereto; and means for measuring a change in an electrical parameter between said plurality of conducting regions to provide a value of force when pressure is applied to said layers.
Claim 8
Dependent Claim
95 words
A pressure sensing device comprising: a first insulating material; a second insulating material; a conducting layer in contact with an inner surface of said first insulating material; a layer of force transducer ink in contact with said conducting layer; a resistive element in contact with said force transducer ink layer and said second insulating material, said resistive element having a plurality of conducting regions coupled thereto; and means for measuring a change in an electrical parameter between said plurality of conducting regions to provide a value of force when pressure is applied to said layers.
Claim 9
Independent Claim
61 words
The method of measuring a force comprising the steps of: measuring a resistive value of a layer of resistive material; separating said resistive material from a conducting layer of material by a layer of force transducer ink; and measuring a change in resistance of said layer of resistive material when a force is transmitted to said layer of force transducer ink.
Claim 10
Independent Claim
61 words
The method of measuring a force comprising the steps of: measuring a resistive value of a layer of resistive material; separating said resistive material from a conducting layer of material by a layer of force transducer ink; and measuring a change in resistance of said layer of resistive material when a force is transmitted to said layer of force transducer ink.
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) | 1991-08-16 | 1992-02-15 | 1992-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-16 | 1996-02-15 | 1996-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-16 | 2000-02-15 | 2000-08-16 | $7700.00 | Window Closed / Lapsed |