# US 11,077,331 B2 · Direct drive resistance system for exercise machines

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- Number: US 11,077,331 B2
- Document ID: US11077331B2
- Status: Granted
- Kind: B2
- Application number: 16/259,179
- Filed: 2019-01-28
- Published: 2020-07-30
- Granted: 2021-08-03
- Earliest claimed: 2019-01-28
- Assignees: Product Design Innovations, LLC
- Applicants: Product Design Innovations, LLC
- Inventors: Joseph K. Ellis
- Web page: https://patentgrep.com/patent/US11077331B2

## CPC

- A63B 21/0615: {pivoting about a fixed horizontal fulcrum}
- A63B 21/00072: {by changing the length of a lever}
- A63B 21/159: {Using levers for transmitting forces}
- A63B 23/0405: {involving a bending of the knee and hip joints simultaneously (A63B23/0476 takes precedence)}
- A63B: APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT (apparatus for passive exercising, massage A61H)

## Abstract

A direct drive resistance system for exercise machines having a weighted moment arm that is lifted and lowered by a lifting moment arm and lifting component, which is moved by a force transfer assembly, which is operatively connected to a rotary component of an exercise machine, such that when the exercise machine is activated the force transfer assembly, the lifting moment arm, the lifting component and the weighted moment arm move concurrently to create a resistance force to the motion of the exercise machine.

## Claims

### Claim 1

A direct drive resistance system for exercise machines comprising:
a) a structural support frame;
b) a weighted moment arm pivotably connected to the support frame;
c) a lifting moment arm pivotably connected to the support frame;
d) a force transfer assembly pivotably connected to the support frame and operatively connected to the lifting moment arm;
e) an adjustable position lifting component movably mounted on the lifting moment arm; and
f) a latching and unlatching mechanism for securing the adjustable position lifting component to a position on the lifting moment arm;
wherein the weighted moment arm, the lifting moment arm, the adjustable position lifting component, and the force transfer assembly are operatively engaged with each other such that the lifting moment arm and the adjustable position lifting component lifts and lowers the weighted moment arm during operation of the system.

### Claim 2 (depends on 1)

The direct drive resistance system for exercise machines of claim 1, wherein the force transfer assembly is operatively connected to an exercise machine.

### Claim 3 (depends on 2)

The direct drive resistance system for exercise machines of claim 2, wherein the force transfer assembly utilizes at least one push rod to transfer movement from the exercise machine to the lifting moment arm.

### Claim 4 (depends on 3)

The direct drive resistance system for exercise machines of claim 3, wherein the resistance created by the motion of the system increases as the weighted moment arm is lifting, decreases as the weighted moment arm is lowering, and remains constant when the weighted moment arm is activated and held in a stationary position.

### Claim 5 (depends on 4)

The direct drive resistance system for exercise machines of claim 4, wherein the adjustable position lifting component is adjustable and latchable into a position on the lifting moment arm prior to activation of the system so as to set the resistance of the system at the starting position.

### Claim 6 (depends on 1)

The direct drive resistance system for exercise machines of claim 1, wherein the weighted moment arm, the lifting moment arm, and the force transfer assembly all rotate less than 180 degrees during operation of the system.