Vehicle load warning system

• US 7,561,034 B2
• Filed: 09/25/2006
• Issued: 07/14/2009
• Est. Priority Date: 04/01/2003
• Status: Active Grant

• Current Assignee: Vishay Transducers Ltd. (Vishay Precision Group Incorporated)
• Original Assignee: Stress-Tek Incorporated (Vishay Precision Group Incorporated)
• Inventors: Hoffman, John, Ryan, Pat, Schwartz, Lee, Zimmerman, Bill, Reichow, Keith
• Primary Examiner(s): Nguyen; Hung T.
• Application Number:
  US11/527,738
• Publication Number:
  US 20070273493A1
• Time in Patent Office: 1,023 Days
• Field of Search: 340/440, 340/665, 340/666, 340/667, 340/425.5, 340/438, 340/686.1, 177/136, 177/137, 177/141, 177/184, 177/186, 180/290, 180/905
• US Class Current: 340/440
• CPC Class Codes: G01G 19/08 for incorporation in vehicles
• CPC Class Codes: G01G 23/005 Means for preventing overload

Abstract

A load warning system for use with a vehicle having a load-support portion, a frame, and a vehicle-support portion movably coupled to the frame. The system has an engagement portion mountable to the vehicle-support portion or the frame and is movable therewith as a unit. A load indicator is mountable to the other one of the vehicle-support portion or the frame, and is spaced apart from the engagement portion when in a first position. The load indicator moves to a second position and engages the engagement portion when the frame moves a selected distance in response to the load applied to the load-support portion. The load indicator provides a signal upon being moved to the second position. A warning indicator is coupled to the load indicator and provides an improper load warning to a user in response to the signal from the load indicator.

Claims

1. A vehicle and load warning system, comprising:

a vehicle having a first support portion adapted to receive a load thereon, a frame coupled to the first support portion, and a second support portion coupled to the frame, the frame being movable relative to the second support portion;

an engagement portion movable with a first one of the second support portion and the frame;

a load indicator coupled to a second one of the second support portion and the frame, the load indicator spaced apart from the engagement portion when in a first position and configured to move to a second position and engage the engagement portion when the frame moves a selected distance relative to the second support portion in response to the load being applied to the first support portion, the load indicator having a switch assembly and a member coupled to the switch assembly, the member being resiliently moveable against the engagement portion after the load indicator is moved to the second position; and

a warning indicator coupled to the load indicator and configured to provide a signal indicating an overload condition in response to the load indicator moving to the second position.

2. The system of claim 1 wherein the engagement portion is at least a portion of a bracket attached to the first one of the second support portion and the frame.

3. The system of claim 1 wherein the frame is rotatable relative to the second support portion about an axis of rotation when the load is rearward of the axis of rotation, and at least one of the engagement portion and the load indicator is positioned rearward of the axis of rotation.

4. The system of claim 1 wherein the second support portion includes a rear axle assembly, and a first one of the engagement portion and the load indicator is mounted to the rear axle assembly, and a second one of the engagement portion and the load indicator is positioned generally rearward of the rear axle assembly.

5. The system of claim 1 wherein the load indicator includes a mounting bracket attached to the second one of the second support portion and the frame, and the switch assembly is adjustably attached to the mounting bracket.

6. The system of claim 1 wherein the vehicle has a power source, the load indicator is coupled to the power source and draws power from the power source only when the load indicator is in the second position.

7. The system of claim 1, further comprising a data collector coupled to the vehicle and configured to collect and output data including at least one of time, date, load, activation of the warning indicator, and duration of use of the system.

8. The system of claim 1 wherein the signal is an audible signal.

9. The system of claim 1 wherein the overload warning indicator is a visual indicator.

10. The system of claim 1 wherein the warning indicator includes a horn, and the signal from the load indicator activates the horn to provide the signal.

11. The system of claim 1 wherein the vehicle has an electrical control with a starter relay, and further comprising a relay assembly coupled to the load indicator and to the starter relay.

12. The system of claim 11 wherein the relay assembly is configured to allow for generation of the signal when the vehicle is in a park or neutral gear condition.

13. The system of claim 1, further comprising a control system coupled to the load indicator and to the warning system, the control system being configured to monitor a frequency or duration of the signals from the load indicator and to block the signal from reaching the warning indicator until a selected condition of frequency or duration of the signals exists.

14. The system of claim 1 wherein the first support portion of the vehicle is a rear axle coupled to the frame by a suspension system.

15. A vehicle and load warning system, comprising:

a vehicle having a first support portion adapted to receive a load thereon, a frame coupled to the first support portion, and a second support portion coupled to the frame, the frame being vertically movable relative to the second support portion and being rotatable about a point of rotation relative to the second support portion;

an engagement portion movable with a first one of the second support portion and the frame;

a load indicator coupled to a second one of the second support portion and the frame, the load indicator spaced apart from the engagement portion when in a first position and configured to move to a second position and engage the engagement portion when the frame moves vertically and rotationally a selected distance relative to the second support portion in response to the load being applied to the first support portion, the load indicator having a switch assembly and a member coupled to and laterally offset from the switch, the member being directly engagable with the engagement portion; and

a warning indicator coupled to the load indicator and configured to provide a signal in response to the load indicator moving to the second position.

16. The system of claim 15 wherein the engagement portion is at least a portion of a bracket attached to the first one of the second support portion and the frame.

17. The system of claim 15 wherein the load indicator includes a switch and a flexible member coupled to the switch and resiliently moveable against the engagement member after the load indicator is moved to the second position.

18. The system of claim 15 wherein the load indicator includes a mounting bracket attached to the second one of the second support portion and the frame, and the switch assembly is adjustably attached to the mounting bracket.

19. The system of claim 15 wherein the signal is an audible or visual signal.

20. The system of claim 15 wherein the vehicle has an electrical control with a starter relay, and further comprising a relay assembly coupled to the load indicator and to the starter relay.

21. The system of claim 20 wherein the relay assembly is configured to allow for generation of the signal when the vehicle is in a park or neutral gear condition.

22. The system of claim 15, further comprising a control system coupled to the load indicator and to the warning system, the control system being configured to monitor a frequency or duration of the signals from the load indicator and to block the signal from reaching the warning indicator until a selected condition of frequency or duration of the signals exists.

23. The system of claim 15 wherein the first support portion of the vehicle is a rear axle coupled to the frame by a suspension system.

24. The system of claim 15 wherein the vehicle has a power source, the load indicator is coupled to the power source and draws power from the power source only when the load indicator is in the second position.

25. The system of claim 15, further comprising a data collector coupled to the vehicle and configured to collect and output data including at least one of time, date, load, activation of the warning indicator, and duration of use of the system.

26. A vehicle load warning system for use with a vehicle having a first support portion adapted to receive a load thereon, a frame coupled to the first support portion, and a second support portion coupled to the frame, the frame being movable relative to the second support portion, comprising:

an engagement portion configured to be movable with a first one of the second support portion and the frame;

a load indicator configured to be coupled to a second one of the second support portion and the frame, the load indicator spaced apart from the engagement portion when in a first position and configured to move to a second position and engage the engagement portion when the frame moves a selected distance relative to the second support portion in response to the load being applied to the first support portion, the load indicator having a switch assembly and a member coupled to the switch assembly, the member being resiliently moveable against the engagement portion after the load indicator is moved to the second position; and

a warning indicator coupled to the load indicator and configured to provide a signal indicating an overload condition in response to the load indicator moving to the second position.

27. A vehicle load warning system for use with a vehicle having a first support portion adapted to receive a load thereon, a frame coupled to the first support portion, and a second support portion coupled to the frame, the frame being vertically movable relative to the second support portion and being rotatable about a point of rotation relative to the second support portion, comprising,

an engagement portion configured to be movable with a first one of the second support portion and the frame;

a load indicator configured to be coupled to a second one of the second support portion and the frame, the load indicator spaced apart from the engagement portion when in a first position and configured to move to a second position and engage the engagement portion when the frame moves vertically and rotationally a selected distance relative to the second support portion in response to the load being applied to the first support portion, the load indicator having a switch assembly and a member coupled to and laterally offset from the switch, the member being directly engagable with the engagement portion; and

a warning indicator coupled to the load indicator and configured to provide a signal in response to the load indicator moving to the second position.