Person support apparatuses with drive controls

Patent metadata

Field	Value
Publication number	US-2016374874-A1
Application number	US-201615189149-A
Country	US
Kind code	A1
Filing date	Jun 22, 2016
Priority date	Jun 25, 2015
Publication date	Dec 29, 2016
Grant date	—

Abstract

A person support apparatus includes a base, wheels, a drive system, a support surface, a lift system, and a control. The control controls the drive system in response to forward/reverse forces applied thereto, and also controls the lift system in response to upward or downward forces applied thereto. In some embodiments, a controller compares a magnitude of the forward/reverse force to a magnitude of the upward/downward force and commands the drive system to drive the wheels if the magnitude of the forward/reverse force exceeds the magnitude of the upward/downward force. The control may include a user-engageable portion that is constructed to not move with respect to a force sensor when forward or reverse forces are applied to the user-engageable portion. The controller controls the drive system in response to the forward or reverse forces applied to the user-engageable portion.

First claim

What is claimed is:

1 . A person support apparatus comprising:
a base; a plurality of wheels coupled to the base; a drive system coupled to at least one of the wheels to drive the person support apparatus in a forward and reverse direction; a support surface adapted to support thereon an occupant of the person support apparatus; a lift system adapted to adjust a height of the support surface with respect to the base; and a control in communication with the drive system and the lift system, the control adapted to control the drive system in response to forward forces applied to the control, and the control adapted to control the lift system in response to upward or downward forces applied to the control.

2 . The person support apparatus of claim 1 further including a litter mounted on top of the lift system such that the lift system adjusts the height of the litter with respect to the base, wherein the support surface is mounted on top of the litter.

3 . The person support apparatus of claim 2 wherein the control includes a handle positioned at the litter, the handle moving upward and downward with the litter.

4 . The person support apparatus of claim 1 wherein the control only controls the lift system in response to the upward or downward forces at times when the drive system is not driving the at least one of the wheels.

5 . The person support apparatus of claim 1 further including an enable switch that must be activated before the drive system will respond to the forward or reverse forces applied to the control and before the lift system will respond to the upward or downward forces applied to the control.

6 . The person support apparatus of claim 1 wherein the control includes a right handle and a left handle, and the person support apparatus further includes a first enable switch and a second enable switch mounted to the right handle, and a third enable switch and a fourth enable switch mounted to the left handle, wherein either the first or third enable switch must be activated before the drive system will respond to forward or reverse forces applied to either of the right or left handles, and wherein the second or fourth enable switch must be activated before the lift system will respond to upward or downward forces applied to either of the right or left handles.

7 . The person support apparatus of claim 2 further including:
a plurality of siderails coupled to the litter, each of the siderails being movable between a raised position and a lowered position; and
a plurality of siderail sensors, each siderail sensor adapted to detect if a corresponding one of the siderails is in the raised position;
wherein the lift system is configured to not respond to upward or downward forces applied to the control unless all of the siderail sensors indicate that the siderails are in their raised positions.

8 . The person support apparatus of claim 1 further including a timer adapted to start counting when the drive system stops driving the at least one of the wheels, wherein the lift system is configured to not respond to the upward or downward forces applied to the control until after the timer reaches a threshold.

9 . The person support apparatus of claim 1 wherein the control includes a load cell adapted to detect all of the forward, reverse, upward, and downward forces.

10 . The person support apparatus of claim 1 wherein the lift system adjusts the height of the support surface at a constant speed in response to upward or downward forces applied to the control, and the drive system drives the at least one of the wheels in a manner that varies with a magnitude of the forward or reverse forces applied to the control.

11 . A person support apparatus comprising:
a base; a plurality of wheels coupled to the base; a drive system coupled to at least one of the wheels to drive the person support apparatus in a forward direction; a support surface adapted to support thereon an occupant of the person support apparatus; a lift system adapted to adjust a height of the support surface with respect to the base; a controller in communication with the drive system and the lift system; and a control in communication with the controller, the control adapted to detect forward forces, upward forces, and downward forces applied to the control, wherein the controller compares a magnitude of the forward forces to magnitudes of the upward and downward forces and commands the drive system to drive the at least one of the wheels if the magnitude of the forward forces exceeds the magnitudes of the upward and downward forces.

12 . The person support apparatus of claim 11 wherein the controller commands the lift system to change a height of the support surface if the magnitude of the upward or downward forces exceeds the magnitude of the forward forces.

13 . The person support apparatus of claim 12 wherein the controller pauses for first predetermined amount of time before switching from commanding the lift system to change the height of the support surface to commanding the drive system to drive the at least one of the wheels; and wherein the controller pauses for a second predetermined amount of time before switching from commanding the drive system to drive the at least one of the wheels to commanding the lift system to change the height of the support surface, wherein the first and second predetermined amounts of time are different.

14 . The person support apparatus of claim 12 further including a litter mounted on top of the lift system such that the lift system raises and lowers a height of the litter, the support surface being mounted on top of the litter.

15 . The person support apparatus of claim 14 wherein the control includes a handle positioned on the litter, the handle moving upward and downward with the litter.

16 . The person support apparatus of claim 14 further including:
a plurality of siderails coupled to the litter, each of the siderails being movable between a raised position and a lowered position; and
a plurality of siderail sensors, each siderail sensor adapted to detect if a corresponding one of the siderails is in the raised position;
wherein the controller commands the lift system to change the height of the support surface only if both of the following conditions are met: (1) the magnitude of the upward or downward forces exceeds the magnitude of the forward forces, and (2) the siderail sensors indicate that the siderails are in their raised positions.

17 . A person support apparatus comprising:
a base; a plurality of wheels coupled to the base; a drive system coupled to at least one of the wheels to drive the person support apparatus in a forward and reverse direction; a support surface adapted to support thereon an occupant of the person support apparatus; a control for controlling the drive system, the control including a user-engageable portion and a force sensor adapted to detect a magnitude of forward or reverse forces applied to the user-engageable portion, wherein the user-engageable portion is constructed to not move with respect to the force sensor when forward or reverse forces are applied to the user-engageable portion; and a controller in communication with the drive system, the controller adapted to control the drive system in response to the forward or reverse forces applied to the user-engageable portion of the control.

18 . The person support apparatus of claim 17 wherein the user-engageable portion is a handle and the force sensor is positioned inside of the handle.

Assignees

• Stryker Corp

Inventors

• Trepanier Jerald A
• St John Connor Feldpausch
• Brubaker Michael T
• Gentile Christopher
• Bartley Gary L

Classifications

• A61G2203/30

  characterised by sensor means · CPC title

• A61G7/0509

  sliding or pivoting downwards · CPC title

• A61G7/0516

  with height adjustability · CPC title

• A61G13/08

  the table being divided into different adjustable sections · CPC title

• A61G1/0218

  3 pairs having wheels within a pair on the same position in longitudinal direction, e.g. on the same axis · CPC title