Patent ID: 9477147
Filing Date: 2016-10-25
CPC Classification: B08B,E03F,F16C,F16F,G01N,G02B,G03B,H04N,Y10T

Claim Text:
1. A push-cable system, comprising: a push-cable having a proximal end and a distal end; and a spring assembly coupled to the distal end of the push-cable, comprising: an outer coiled spring having a proximal end and a distal end; and an inner coiled spring nested at least partially within the outer coiled spring; wherein one or both of the inner coiled spring and the outer coiled spring includes three or more sections, wherein each of the three or more sections have a different flexibility; and/or wherein the inner coiled spring is shorter than the outer coiled spring and the inner coiled spring is nested within the outer coiled spring at the proximal end of the outer coiled spring.