# US 10,369,019 B2 · Prosthetic foot with enhanced stability and elastic energy return

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,369,019 B2
- Document ID: US10369019B2
- Status: Granted
- Kind: B2
- Application number: 15/386,366
- Filed: 2016-12-21
- Published: 2017-04-27
- Granted: 2019-08-06
- Earliest claimed: 2013-02-26
- Assignees: Ossur Hf
- Applicants: Össur hf
- Inventors: Arinbjorn Viggo Clausen; Bjarni Andresson; Vilhjalmur Freyr Jonsson; Christophe Lecomte
- Web page: https://patentgrep.com/patent/US10369019B2

## CPC

- A61F 2/6607: {Ankle joints}
- A61F 2/66: Feet; Ankle joints
- A61F 2/70: electrical
- A61F 2/74: fluid {, i.e. hydraulic or pneumatic}
- A61F 2002/5006: {Dampers, e.g. hydraulic damper}
- A61F 2002/503: {for adjusting elasticity, flexibility, spring rate or mechanical tension}
- A61F 2002/5033: {for adjusting damping}
- A61F 2002/5079: {Leaf springs (A61F2002/6657 takes precedence)}
- A61F 2002/6657: {having a plate-like or strip-like spring element, e.g. an energy-storing cantilever spring keel}
- A61F 2002/6664: {Dual structures made of two connected cantilevered leaf springs}
- A61F 2002/6671: {C-shaped}
- A61F 2002/701: {operated by electrically controlled means, e.g. solenoids or torque motors}
- A61F 2002/7615: {Measuring means}
- A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C)

## Abstract

A prosthetic foot comprises an attachment member and two or more flexible members. The attachment member can include a connector configured to connect the attachment member to a user or another prosthetic device. The two or more flexible members can be rotatably attached to the attachment member by rotatable joints such that the flexible members can both rotate and flex relative to the attachment member when the prosthetic foot contacts the ground.

## Claims

### Claim 1

A prosthetic foot comprising:
an attachment member disposed at an ankle position of the prosthetic foot, the attachment member comprising a connector configured to connect the attachment member to a user or another prosthetic device;
a first flexible member having a proximal end and a distal end, the proximal end of the first flexible member coupled to an anterior portion of the attachment member by a rotatable connection;
a second flexible member disposed below the first flexible member, the second flexible member having a proximal end and a distal end, the proximal end of the second flexible member located rearwardly of the proximal end of first flexible member when standing on a level surface and operatively coupled to a posterior portion of the attachment member;
and a third flexible member disposed below second flexible member and extending between a proximal end and a distal end, the third flexible member configured to contact a support surface while the prosthetic foot is in use, wherein the proximal ends of the second and third flexible members define a gap that expands toward a rearward portion of the prosthetic foot, away from a toe region.

### Claim 2 (depends on 1)

The prosthetic foot of claim 1, wherein the second flexible member couples to the posterior portion of the attachment member via an actuator.

### Claim 3 (depends on 2)

The prosthetic foot of claim 2, wherein the actuator is a powered actuator.

### Claim 4 (depends on 3)

The prosthetic foot of claim 3, wherein the powered actuator is an active actuator.

### Claim 5 (depends on 2)

The prosthetic foot of claim 2, wherein the actuator is a passive actuator.

### Claim 6 (depends on 1)

The prosthetic foot of claim 1, wherein the third member generally extends from a heel end to a toe end of the prosthetic foot.

### Claim 7 (depends on 1)

The prosthetic foot of claim 1, wherein the first flexible member extends rearwardly from a proximal end and then forwardly to the distal end of the foot member.