Patent ID: 11965789
Assignee: INTUITIVE SURGICAL OPERATIONS, INC.
Field: Measurement (Instruments)
Classification: CPC G  A | IPC A  G

Claim 15:
16. A force sensor comprising:
a beam including a proximal end portion, a distal end portion, and a first face between the proximal end portion of the beam and the distal end portion of the beam;
a first tension bridge circuit on the first face of the beam;
a second tension bridge circuit on the first face of the beam; and
a compression bridge circuit on the first face of the beam;
a first measurement signal lead line;
a second measurement signal lead line; and
a third measurement signal lead line;
wherein the first tension bridge circuit includes a first tension strain gauge resistor and a second tension strain gauge resistor;
wherein the second tension bridge circuit includes a third tension strain gauge resistor and a fourth tension strain gauge resistor;
wherein the compression bridge circuit includes a first compression strain gauge resistor and a second compression strain gauge resistor;
wherein the first tension strain gauge resistor, the first compression strain gauge resistor, and the third tension strain gauge resistor are located at the proximal end portion of the beam;
wherein the second tension strain gauge resistor, the second compression strain gauge resistor, and the fourth tension strain gauge resistor are located at the distal end portion of the beam;
wherein the first measurement signal lead line is mechanically isolated from the beam;
wherein the first measurement signal lead line electrically couples the first compression strain gauge resistor and the second compression strain gauge resistor;
wherein the second measurement signal lead line is mechanically isolated from the beam;
wherein the second measurement signal lead line electrically couples the first tension strain gauge resistor and the second tension strain gauge resistor;
wherein the third measurement signal lead line is mechanically isolated from the beam;
wherein the third measurement signal lead line electrically couples the third tension strain gauge resistor and the fourth tension strain gauge resistor.