IP Library › Granted Patent US 12,502,320
Granted Patent B2
US 12,502,320 · App. 17/556,074 · Granted Dec 23, 2025

System to adjust drive operation and performance in response to detection of a front add-on for a wheelchair

Inventors: William Alexander Emfinger (Nashville, TN); Benjamin William Gasser (Nashville, TN); Benjamin Phillip Hemkens (Nashville, TN)
Assignee: PERMOBIL, INC.
A61G5/047A61G5/027A61G5/045A61G5/1005
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Quick Facts
Patent No.
US 12,502,320
App. No.
17/556,074
Granted
Dec 23, 2025
Kind
B2
Abstract

A wheelchair including a steering assembly configured to selectively attach to the wheelchair, the steering assembly including a steering member, a front wheel operably connected to the steering member, a frame assembly configured to carry the steering member and the front wheel, and a mounting assembly coupled to the frame assembly, and a drive assembly coupled to the wheelchair. The drive assembly is configured to operate in a first configuration in response to the steering assembly being detached from the wheelchair, and the drive assembly is configured to operate in a second configuration in response to the steering assembly being attached to the wheelchair.

Claims (61)

1 . A wheelchair comprising:

a steering assembly configured to selectively attach to the wheelchair, the steering assembly including:

a steering member;

a front wheel operably connected to the steering member;

a frame assembly configured to carry the steering member and the front wheel; and

a mounting assembly coupled to the frame assembly; and

a drive assembly coupled to the wheelchair at a position between a pair of rear wheels of the wheelchair,

wherein the drive assembly is configured to operate in a first configuration in response to the steering assembly being detached from the wheelchair,

wherein the drive assembly is configured to operate in a second configuration in response to the steering assembly being attached to the wheelchair,

wherein in the first configuration, the drive assembly drives the wheelchair at a first rate of acceleration, and

wherein in the second configuration, the drive assembly drives the wheelchair at a second rate of acceleration different than the first rate of acceleration.

2 . The wheelchair of claim 1 , wherein in the first configuration, the drive assembly drives the wheelchair at a first speed, and wherein in the second configuration, the drive assembly drives the wheelchair at a second speed different than the first speed.

3 . The wheelchair of claim 1 , wherein the mounting assembly includes an electrical connector, and wherein in response to the steering assembly being attached to the wheelchair, the electrical connector is in electrical communication with the drive assembly.

4 . The wheelchair of claim 3 , wherein the electrical connector is in electrical communication with a first actuator positioned on the steering assembly.

5 . The wheelchair of claim 4 , wherein in response to actuation of the first actuator, the drive assembly detects a signal from the electrical connector and operates in the second configuration.

6 . The wheelchair of claim 5 , wherein in the first configuration, the drive assembly drives the wheelchair at a first speed, and wherein in the second configuration, the drive assembly drives the wheelchair at a second speed different than the first speed.

7 . The wheelchair of claim 1 , wherein the drive assembly is coupled to a mounting member of the wheelchair.

8 . The wheelchair of claim 7 , wherein the steering assembly is configured to selectively attach to the mounting member of the wheelchair.

9 . A wheelchair comprising:

a steering assembly configured to selectively attach to the wheelchair, the steering assembly including:

a steering member;

a front wheel operably connected to the steering member;

a frame assembly configured to carry the steering member and the front wheel;

a brake operably connected to the front wheel;

at least one brake actuator operably connected to the brake; and

a mounting assembly coupled to the frame assembly; and

a drive assembly removably coupled to the wheelchair,

wherein in response to actuation of the brake actuator, the drive assembly is configured to temporarily disengage operation,

wherein the drive assembly is configured to operate in a first configuration in response to the steering assembly being detached from the wheelchair,

wherein the drive assembly is configured to operate in a second configuration in response to the steering assembly being attached to the wheelchair,

wherein in the first configuration, the drive assembly drives the wheelchair at a first speed, and

wherein in the second configuration, the drive assembly drives the wheelchair at a second speed greater than the first speed.

10 . The wheelchair of claim 9 , the steering assembly including a throttle in communication with the drive assembly and configured to operate the drive assembly, wherein in response to actuation of the brake actuator, the throttle is configured to temporarily disengage communication with the drive assembly.

11 . The wheelchair of claim 9 , wherein the steering assembly including a throttle in communication with the drive assembly and configured to operate the drive assembly.

12 . The wheelchair of claim 9 , wherein the drive assembly is removably coupled to a mounting member of the wheelchair.

13 . The wheelchair of claim 12 , wherein the steering assembly is configured to selectively attach to the mounting member of the wheelchair.

14 . The wheelchair of claim 9 , wherein in the first configuration, the drive assembly drives the wheelchair at a first rate of acceleration, and wherein in the second configuration, the drive assembly drives the wheelchair at a second rate of acceleration different than the first rate of acceleration.

15 . The wheelchair of claim 9 , wherein the mounting assembly includes an electrical connector, and wherein in response to the steering assembly being attached to the wheelchair, the electrical connector is in electrical communication with the drive assembly.

16 . The wheelchair of claim 15 , wherein the electrical connector is in electrical communication with a throttle positioned on the steering assembly.

17 . The wheelchair of claim 15 , wherein in response to actuation of a throttle, the drive assembly detects a signal from the electrical connector and operates in the second configuration.

18 . A wheelchair comprising:

a steering assembly configured to selectively attach to the wheelchair, the steering assembly including:

a steering member;

a front wheel operably connected to the steering member;

a frame assembly configured to carry the steering member and the front wheel;

a brake operably connected to the front wheel;

at least one brake actuator operably connected to the brake; and

a mounting assembly coupled to the frame assembly; and

a drive assembly removably coupled to the wheelchair,

wherein in response to actuation of the brake actuator, the drive assembly is configured to temporarily disengage operation,

wherein the drive assembly is configured to operate in a first configuration in response to the steering assembly being detached from the wheelchair, and

wherein the drive assembly is configured to operate in a second configuration in response to the steering assembly being attached to the wheelchair,

wherein in the first configuration, the drive assembly drives the wheelchair at a first rate of acceleration, and

wherein in the second configuration, the drive assembly drives the wheelchair at a second rate of acceleration different than the first rate of acceleration.

19 . The wheelchair of claim 18 , the steering assembly including a throttle in communication with the drive assembly and configured to operate the drive assembly, wherein in response to actuation of the brake actuator, the throttle is configured to temporarily disengage communication with the drive assembly.

20 . The wheelchair of claim 18 , wherein the steering assembly including a throttle in communication with the drive assembly and configured to operate the drive assembly.

21 . The wheelchair of claim 18 , wherein the drive assembly is removably coupled to a mounting member of the wheelchair.

22 . The wheelchair of claim 21 , wherein the steering assembly is configured to selectively attach to the mounting member of the wheelchair.

23 . The wheelchair of claim 18 , wherein the mounting assembly includes an electrical connector, and wherein in response to the steering assembly being attached to the wheelchair, the electrical connector is in electrical communication with the drive assembly.

24 . The wheelchair of claim 23 , wherein the electrical connector is in electrical communication with a throttle positioned on the steering assembly.

25 . The wheelchair of claim 23 , wherein in response to actuation of a throttle, the drive assembly detects a signal from the electrical connector and operates in the second configuration.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 8, 2022
From: EMFINGER, WILLIAM ALEXANDER; GASSER, BENJAMIN WILLIAM; HEMKENS, BENJAMIN PHILLIP
To: PERMOBIL, INC.
Reel/Frame 059542/0704 →
Continuity (1)
Related Publication 20230190548A1 · Jun 22, 2023
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