Electrically activated visual indicator for visually indicating the mode of a hospital bed castor

• US 5,450,639 A
• Filed: 12/21/1993
• Issued: 09/19/1995
• Est. Priority Date: 12/21/1993
• Status: Expired due to Term

• Current Assignee: Hill-Rom Services Incorporated (Baxter International Inc.)
• Original Assignee: Hill-Rom Company Incorporated (Baxter International Inc.)
• Inventors: Kramer, Kenneth L., Weismiller, Matthew W.
• Primary Examiner(s): Trettel, Richard
• Application Number:
  US08/171,006
• Time in Patent Office: 637 Days
• Field of Search: 188/1.11 R, 188/1.11 E, 188/1.12, 16/18, 16/35 R, 5/600, 5/86.1, 5/424
• US Class Current: 5/600
• CPC Class Codes: A61G 7/00 Beds specially adapted for nursing; Devices for lifting patients or disabled persons stretchers with facilities for picking up patients or disabled persons A61G1/003
• CPC Class Codes: A61G 7/0528 Steering or braking devices for castor wheels

Abstract

An electrically activated visual indicator for visually indicating the status of a castor of a hospital bed comprising a flashing light emitting diode (LED) contained within and visible through a foot pedal that is connected to a positioning mechanism for selectively placing at least one castor of the hospital bed into a brake, neutral or steer mode, wherein the flashing LED is activated when the castor is in either the neutral or steer mode and is deactivated when the castor is in the brake mode.

Claims

1. A hospital bed comprising:

a base;

a patient support mounted above said base;

castors mounted around said base and including at least one castor having a brake mode and at least one of neutral and steer modes;

a positioning mechanism connected to said at least one castor for selectively positioning said at least one castor in said neutral mode and said at least one of brake and steer modes;

an actuator for manual movement by a care provider for actuating said positioning mechanism; and

an electrically activated visual indicator for visually indicating said mode of said at least one castor mounted on said actuator, said electrically activated visual indicator being responsive to movements of said actuator.

2. The hospital bed of claim 1 wherein said positioning mechanism is a linkage.

3. The hospital bed of claim 1 wherein said electrically activated visual indicator is activated when said at least one castor is not in said brake mode.

4. The hospital bed of claim 1 wherein said electrically activated visual indicator comprises:

a switch electrically connected to a power supply;

means operably associated with said actuator and said switch for placing said switch into an open or closed condition; and

a visual display device electrically connected to said switch, said display device being activated when said switch is in said closed condition.

5. The hospital bed of claim 4 wherein said switch is normally in said closed condition.

6. The hospital bed of claim 5 wherein said actuator comprises a pedal rotatably connected by a shaft to said positioning mechanism for foot activation of said positioning mechanism by rotation of said shaft in first and second directions.

7. The hospital bed of claim 6 wherein said visual display device is mounted on said pedal.

8. The hospital bed of claim 7 wherein said visual display device is a light emitting diode.

9. The hospital bed of claim 6 wherein said operably associated means comprises:

a roll-pin extending radially outward from said shaft; and

a switch arm extending from said normally closed switch such that said roll-pin, when moved away from said switch arm, releases said switch arm and permits said switch to return to said normally closed condition when said shaft is rotated in said first direction and said roll-pin, when moved against said switch arm, depresses said switch arm and places said normally closed switch into said open condition when said shaft is rotated in said second direction.

10. A hospital bed comprising:

a base;

a patient support mounted above said base;

castors mounted around said base and including at least one castor having neutral, brake and steer modes;

a linkage mechanism connected to said at least one castor for selectively positioning said at least one castor in said neutral, brake and steer modes;

a brake pedal rotatably connected by a shaft to said linkage for foot activation of said linkage mechanism by rotation of said shaft in first and second directions;

a normally closed switch electrically connected to a power supply;

means operably associated with said pedal and said switch for placing said normally closed switch into an open or closed condition; and

a light emitting diode electrically connected to said switch mounted on said pedal, said light emitting diode being energized when said switch is in said closed condition for visually indicating said mode of said at least one castor.

11. The hospital bed of claim 10 wherein said normally closed switch is in said closed condition when said at least one castor is in said neutral and steer modes.

12. The hospital bed of claim 10 wherein said operably associated means comprises:

a roll-pin extending radially outward from said shaft; and

a switch arm extending from said normally closed switch such that said roll-pin, when moved away from said switch arm, releases said switch arm and permits said normally closed switch to return to said normally closed condition when said shaft is rotated in said first direction and said roll-pin, when moved against said switch arm, depresses said switch arm and places said normally closed switch into said open condition when said shaft is rotated in said second direction.

13. For a hospital bed having a base and castors mounted around the base including at least one castor having a brake mode and at least one of neutral and steer modes, the base having a positioning mechanism connected to the at least one castor for selectively positioning the at least one castor into the brake mode and the at least one of neutral and steer modes, the positioning mechanism being actuatable by a pedal rotatably connected by a shaft to the positioning mechanism for foot activation of the positioning mechanism by rotation of the shaft in first and second directions, an electrically activated visual indicator for visually indicating the mode of the at least one castor comprising:

a switch electrically connected to a power supply;

means operably associated with the pedal and said switch for selectively placing said switch into an open or closed condition; and

a visual display device electrically connected to said switch mounted on the pedal, said display device being activated when said switch is in said closed condition.

14. The electrically activated visual indicator of claim 13 wherein the positioning mechanism is a linkage mechanism.

15. The electrically activated visual indicator of claim 14 wherein said visual display device is a light emitting diode.

16. The electrically activated visual indicator of claim 13 wherein said switch is normally in said closed condition.

17. The electrically activated visual indicator of claim 16 wherein said normally closed switch is in said closed condition when the at least one castor is not in the brake mode.

18. The electrically activated visual indicator of claim 16 further including a roll-pin extending radially outward from the shaft and wherein said operably associated means comprises a switch arm extending from said normally closed switch, said switch arm being depressible by the roll-pin for placing said normally closed switch into said open condition when the shaft is rotated in the second direction.

19. For a hospital bed having a base and castors mounted around the base including at least one castor having neutral, brake and steer modes, the base having a linkage connected to said at least one castor for selectively positioning the at least one castor into the neutral, brake and steer modes, the linkage mechanism being actuatable by a pedal rotatably connected by a shaft to the linkage mechanism for foot activation of the linkage mechanism by rotation of the shaft in first and second directions, an electrically activated visual indicator for visually indicating the mode of the at least one castor comprising:

a normally closed switch electrically connected to a power supply;

means operably associated with the pedal and said switch for placing said normally closed switch into an open condition when the at least one castor is in the brake mode; and

a light emitting diode electrically connected to said switch mounted on the pedal, said light emitting diode being energized when said switch is in said closed condition.

20. The electrically activated visual indicator of claim 19 further including a roll-pin extending radially outward from the shaft and wherein said operably associated means comprises a switch arm extending from said normally closed switch, said switch arm being depressible by the roll-pin for placing said normally closed switch into said open condition when the shaft is rotated in the second direction.