Support enhancing device and associated method

• US 5,587,933 A
• Filed: 11/16/1994
• Issued: 12/24/1996
• Est. Priority Date: 07/19/1994
• Status: Expired due to Term

• Current Assignee: Bcam International, Inc. (CellMetrix, Inc.)
• Original Assignee: Bcam International, Inc. (CellMetrix, Inc.)
• Inventors: Gross, Clifford M.
• Primary Examiner(s): Ramirez, Ellis B.
• Assistant Examiner(s): Shah, Kamini S.
• Application Number:
  US08/340,541
• Time in Patent Office: 769 Days
• Field of Search: 364/558, 364/550, 364/554, 364/551.01, 364/413.01, 297/284 R, 297/284.1-284.4, 297/284.6, 73/12.01, 73/12.08, 73/760, 73/172, 36/136, 36/132, 601/84-100
• US Class Current: 702/139
• CPC Class Codes: A61B 2562/0247 Pressure sensors
• CPC Class Codes: A61B 2562/046 in a matrix array
• CPC Class Codes: A61B 5/1036 Measuring load distribution, e.g. podologic studies
• CPC Class Codes: A61B 5/4528 Joints A61B5/4533, A61B5/4538 take precedence
• CPC Class Codes: A61B 5/6892 Mats
• CPC Class Codes: A61B 5/7257 using Fourier transforms
• CPC Class Codes: A61H 2201/0138 incorporated in furniture
• CPC Class Codes: A61H 2201/0142 Beds
• CPC Class Codes: A61H 2201/0149 Seat or chair
• CPC Class Codes: A61H 2201/5056 pneumatically controlled

Abstract

A device for supporting a human being comprises a superstructure defining a support surface in contact with a body part of a person and measurement componentry on the superstructure for periodically measuring a predetermined biomechanical parameter of the person'"'"'s body part to determine a load distribution on the body part. The measurement componentry includes a fluid filled reservoir at the support surface and a pressure detector in operative engagement with fluid in the reservoir for monitoring changes in the pressure of the fluid, due, for example, to varying loads caused by physical activity. Control circuitry is operatively coupled to the pressure detector for monitoring and characterizing changes in pressure of the fluid over time. Form control componentry is disposed on the superstructure and is operatively connected to the measurement componentry for automatically subjecting the support surface, in response to the determined load distribution, to forces tending to modify a contour of the support surface. The form control componentry may include a pressurization source for modifying a base pressure of the reservoir fluid. The control circuitry also controls or operates the form control componentry to periodically alter the forces exerted on the contour so as to provide a cyclic massage to the person'"'"'s body part.

Claims

1. A method for supporting an animate object, comprising the steps of:

(a) providing a structure defining a configurable contoured support surface;

(b) placing a part of the object in contact with said support surface;

(c) automatically measuring an input parameter to determine a pressure distribution on the part of the animate object in contact with the support structure;

(d) automatically determining an optimal pressure distribution wherein comfort of the object'"'"'s part is maximized according to an empirical regression equation or table;

(e) automatically subjecting said support surface, in response to the selected optimal comfort pressure, to forces tending to modify a contour of said support surface ; and

(f) periodically and automatically altering said forces exerted on said support surface so as to provide a cyclic massage to the object'"'"'s part.

2. The method defined in claim 1 wherein step (f) includes the step of changing said forces so as to separately modify discrete regions of said actual pressure distribution in a predetermined sequence.

3. The method defined in claim 2 wherein said step of changing includes the step of modifying each of said regions of said actual pressure distribution according to a respective predetermined multiplier.

4. The method defined in claim 1, further comprising the step of:

(g) automatically selecting, from among a plurality of predefined regions of said pressure distribution, a preferred region having a lowest average comfort rating or a highest comfort variability, said step (f) including the step of altering forces in said preferred region prior to altering forces in others of said regions.

5. The method defined in claim 1, further comprising the steps of:

(g) automatically comparing said actual pressure distribution, in each of a plurality of discrete regions, with respective maximum pressure thresholds; and

(h) upon determining that pressure in any one of said discrete regions has exceeded the respective maximum pressure threshold, automatically adjusting forces exerted on said support surface in said one of said regions to reduce the actual pressure in said one of said regions to match the respective maximum pressure threshold.

6. The method defined in claim 5 wherein steps (c) and (e) are performed periodically.

7. The method defined in claim 1, further comprising the steps of:

(g) automatically measuring a preselected input parameter at a plurality of locations along said support surface;

(h) automatically comparing said measured parameter values with preset ranges; and

(i) upon determining that said measured value of said parameter in a region of said support surface is outside of a respective preset range, initiating a massage cycle in said region.

8. The method defined in claim 7 wherein step (g) comprises measuring a preselected parameter, wherein said parameter is taken from a group including temperature, mechanical shock, humidity, muscle tension, time and combinations thereof.

9. The method defined in claim 1 wherein a fluid filled reservoir is provided at said support surface and is coupled with said structure, said step (c) including the step of detecting pressure of said fluid in said reservoir.

10. The method defined in claim 9 wherein said step (e) includes the step of modifying the pressure of said fluid.

11. The method defined in claim 1 wherein a fluid filled reservoir is provided at said support surface and is coupled with said structure, said step (e) including the step of modifying the pressure of said fluid, thereby altering pressure exerted by said support surface on said body part.

12. The method defined in claim 1 wherein said support surface is a chair back and said step (c) includes the step of monitoring biomechanical stress on a person'"'"'s back.

13. The method defined in claim 1 wherein said step (f) comprises providing a cyclic massage which includes shifting the weight of the animate object on said support surface so as to effectively move the part of the animate object on said structure.

14. The method defined in claim 1 wherein said step (a) comprises providing a wheel chair defining a configurable contoured seat and back areas.

15. The method defined in claim 1 wherein said step (a) comprises providing a bed defining a configurable support surface.

16. The method defined in claim 1 further comprising the step of:

(g) wherein after step (f) is performed, at least one of steps (c), (d), (e) and (f) are repeated in accordance with a predetermined protocol.

17. The method defined in claim 16 wherein said step (g) comprises utilizing a predetermined protocol which is programmed into the processor by a user.

18. The method defined in claim 16 wherein said step (g) comprises repeating one of said steps based on time.

19. A device for supporting an animate object, comprising:

a structure having a configurable contoured support surface;

a sensing device associated with said structure, said sensing device configured to measure an input parameter reflective of a pressure distribution of parts of the animate object contacting said structure;

a memory device for storing optimal comfort data and said pressure distributions determined by said sensing device;

a surface configuration device associated with said structure; and

a processor associated with said sensing device, said memory and said surface configuration device, wherein said processor;

determines an optimal pressure distribution for the parts supported by said structure using a predetermined formula;

operates said surface configuration device so as to change a contour of said support surface so that the optimal pressure distribution is enacted on the parts; and

operates the surface configuration device so as to periodically alter the configuration of the contoured surface in accordance with a predetermined protocol stored in said memory so that a cyclic massage is provided to the parts.

20. The device defined in claim 19 wherein said sensing device includes a plurality of fluid filled reservoirs at said support surface and at least one pressure detector operatively engageable with fluid in said reservoir.

21. The device defined in claim 20 wherein said configuration device includes means operatively connected to said reservoirs for modifying fluidic pressure in said reservoirs.

22. The device defined in claim 19 wherein said configuration device includes a plurality of fluid filled reservoirs at said support surface and means operatively connected to said reservoirs for modifying pressures of fluid in said reservoirs, thereby altering pressures exerted by said support surface on said body part.

23. The device defined in claim 19 wherein said support surface is a chair back and said measurement means includes means for monitoring biomechanical stress on a person'"'"'s back.

24. The device defined in claim 19 wherein the predetermined protocol comprises a comparator circuit configured for comparing the measured input parameter with preset ranges of the input parameter, and wherein upon determining that the measured input parameter in a region of the support structure is outside of a respective preset range of the input parameter, said comparator circuit communicates with said surface configuration device initiating a massage cycle in the region.

26. The device defined in claim 19 wherein the predetermined protocol is programmed into said processor by a user.

27. The device defined in claim 19 wherein the predetermined protocol is based on time.

28. The device defined in claim 19 wherein the cyclic massage shifts the person'"'"'s body parts on said structure so as to effectively move the person on the structure.

29. The device defined in claim 19 wherein the input parameter is taken from a group including pressure, temperature, mechanical shock, humidity, muscle tension, time and combinations thereof.

30. The device defined in claim 19 wherein said structure is a wheel chair.

31. The device defined in claim 19 wherein said structure is a bed.

32. The device defined in claim 19 further comprising a closed-loop feedback system such that after the cyclic massage is provided to the person=3 s body parts, the device continually repeats the procedure of measuring the input parameter, determining the optimal pressure distribution, changing the contour of the support surface, and providing the cyclic massage.

25. The device defined in claim wherein said comparator circuit is incorporated in said processor.