# US 2014/0156027 A1 · Prosthetic foot

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- Number: US 2014/0156027 A1
- Document ID: US20140156027A1
- Status: Published application
- Kind: A1
- Application number: 14/175,591
- Filed: 2014-02-07
- Published: 2014-06-05
- Earliest claimed: 2012-08-07
- Applicants: Ability Dynamics LLC
- Inventors: Keith B. Smith; Gene Parker
- Web page: https://patentgrep.com/patent/US20140156027A1

## CPC

- A61F 2/66: Feet; Ankle joints
- A61F 2002/5003: {having damping means, e.g. shock absorbers}
- A61F 2002/5009: {having two or more elastomeric blocks}
- A61F 2002/5024: {for adjusting thickness}
- A61F 2002/5027: {for adjusting cross-section}
- A61F 2002/503: {for adjusting elasticity, flexibility, spring rate or mechanical tension}
- A61F 2002/5033: {for adjusting damping}
- A61F 2002/5083: {modular}
- A61F 2002/6642: {Heels}
- A61F 2002/665: {Soles}
- A61F 2002/6664: {Dual structures made of two connected cantilevered leaf springs}
- A61F 2002/6678: {L-shaped}
- 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 may comprise a resilient member comprising an outer arced surface, a toe piece, a mid-stance support, and a heel support. The toe piece may be coupled to an anterior portion of the outer arced surface of the resilient member. The mid-stance support may be removably coupled to a middle portion of the outer arced surface of the resilient member. The heel support coupled to a posterior portion of the outer arced surface of the resilient member.

## Claims

### Claim 1

A prosthetic foot comprising:
a resilient member comprising an anterior end, a middle portion, and a posterior end;
a mid-stance support coupled to a lower surface of the middle portion of the resilient member; and
a heel support coupled to a lower surface of the posterior end of the resilient member.

### Claim 2 (depends on 1)

The prosthetic foot of claim 1, wherein the mid-stance support is removably coupled to the resilient member.

### Claim 3 (depends on 1)

The prosthetic foot of claim 1, wherein the mid-stance support comprises an elastomeric material configured to be adjustable in durometer.

### Claim 4 (depends on 1)

The prosthetic foot of claim 1, wherein the mid-stance support comprises an elastomeric material configured to be adjustable in height.

### Claim 5 (depends on 1)

The prosthetic foot of claim 1, wherein the mid-stance support comprises a concave-shaped lower surface.

### Claim 6 (depends on 1)

The prosthetic foot of claim 1, wherein the mid-stance support comprises a convex-shaped lower surface.

### Claim 7 (depends on 6)

The prosthetic foot of claim 6, wherein the convex-shaped lower surface comprises a radius peak located at a rear portion of the mid-stance support configured to provide a smooth transition from the heel-strike phase to mid-stance phase.

### Claim 8 (depends on 6)

The prosthetic foot of claim 6, wherein the convex-shaped lower surface comprises a radius peak located at a forward portion of the mid-stance support configured to provide a heel strike with less tibial progression and an abrupt transition from the heel-phase to mid-stance phase.

### Claim 9 (depends on 1)

The prosthetic foot of claim 1, wherein the mid-stance support comprises a lower surface with a radius point located above the foot.

### Claim 10 (depends on 1)

The prosthetic foot of claim 1, wherein the mid-stance support comprises a lower surface with a radius point located below the foot.

### Claim 11 (depends on 1)

The prosthetic foot of claim 1, wherein the heel support comprises an elastomeric bumper and a heel lock having an angled surface.

### Claim 12 (depends on 11)

The prosthetic foot of claim 11, wherein the elastomeric bumper is configured to be adjustable in durometer.

### Claim 13 (depends on 11)

The prosthetic foot of claim 11, wherein the angled surface is configured to be adjustable to provide increased heel strike.

### Claim 14 (depends on 1)

The prosthetic foot of claim 1, further comprising a toe piece coupled to a lower surface of the anterior end of the resilient member.

### Claim 15 (depends on 14)

The prosthetic foot of claim 14, wherein the toe piece and the mid-stance support form a support surface.

### Claim 16 (depends on 15)

The prosthetic foot of claim 15, wherein when the support surface is configured to provide support from the heal-strike phase to the toe-off phase.

### Claim 17 (depends on 11)

The prosthetic foot of claim 11, wherein the resilient member and the angled surface of the heel support are capable of storing energy during deflection to propel the user forward.

### Claim 18

A prosthetic foot comprising:
a resilient member comprising an outer arced surface;
a toe piece coupled to an anterior portion of the outer arced surface of the resilient member;
a mid-stance support removably coupled to a middle portion of the outer arced surface of the resilient member; and
a heel support coupled to a posterior portion of the outer arced surface of the resilient member.

### Claim 19 (depends on 18)

The prosthetic foot of claim 18, wherein the mid-stance support comprises an elastomeric material configured to be adjustable in durometer.

### Claim 20 (depends on 18)

The prosthetic foot of claim 18, wherein the mid-stance support comprises an elastomeric material configured to be adjustable in height.

### Claim 21 (depends on 18)

The prosthetic foot of claim 18, wherein the mid-stance support comprises a convex-shaped lower surface.

### Claim 22 (depends on 18)

The prosthetic foot of claim 18, wherein the mid-stance support comprises a concave-shaped lower surface.

### Claim 23 (depends on 21)

The prosthetic foot of claim 21, wherein the convex-shaped lower surface comprises a radius peak located at a rear portion of the mid-stance support.

### Claim 24 (depends on 21)

The prosthetic foot of claim 21, wherein the convex-shaped lower surface comprises a radius peak located at a rear portion of the mid-stance support.

### Claim 25 (depends on 18)

The prosthetic foot of claim 18, wherein the heel support comprises an elastomeric bumper and a heel lock having an angled surface.

### Claim 26 (depends on 25)

The prosthetic foot of claim 25, wherein the elastomeric bumper is configured to be adjustable in durometer.

### Claim 27 (depends on 25)

The prosthetic foot of claim 25, wherein the angled surface is configured to be adjustable to provide increased heel strike.

### Claim 28 (depends on 25)

The prosthetic foot of claim 25, wherein the resilient member and the angled surface of the heel support are capable of storing energy during deflection to propel the user forward.

### Claim 29 (depends on 18)

The prosthetic foot of claim 18, wherein the resilient member comprises a glass fiber.