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A walker for use by those with limited mobility. The walker includes a seat assembly that assists the user in rising from a seated position or sitting from a standing position. The seat assembly is mounted in a frame and includes at least one gas spring mounted between the seat assembly and the fram

A walker for use by those with limited mobility. The walker includes a seat assembly that assists the user in rising from a seated position or sitting from a standing position. The seat assembly is mounted in a frame and includes at least one gas spring mounted between the seat assembly and the frame that deflects the seat assembly while the user is rising from the seat or dampens the deflection of the seat when the user is sitting. The walker may include other capabilities and attachments, including a braking system and mountings for ancillary equipment.

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The invention claimed is: 1. A walker comprising: a frame assembly having: a lower frame assembly adapted to contact the ground; a plurality of uprights mounted to the lower frame assembly, the plurality of uprights comprising a plurality of front uprights and a plurality of rear uprights: and an u

The invention claimed is: 1. A walker comprising: a frame assembly having: a lower frame assembly adapted to contact the ground; a plurality of uprights mounted to the lower frame assembly, the plurality of uprights comprising a plurality of front uprights and a plurality of rear uprights: and an upper frame assembly mounted to the plurality of uprights; two handles mounted to the upper frame assembly, the two handles positioned to assist a user when walking; a seat assembly having a first end pivotally mounted to the frame assembly, and a second end mounted to the rear uprights, wherein the first end of the seat assembly is pivotally mounted to the frame assembly by a plurality of bars, each of the plurality of bars having a first end pivotally mounted to the first end of the seat assembly and a second end pivotally mounted to the frame assembly; and means for assisting the user in rising from the seat assembly. 2. The walker as recited in claim 1, wherein the means for assisting the user comprises at least one gas spring having a first end comprising an extendable rod pivotally mounted to the seat assembly and a second end pivotally mounted to the lower frame assembly. 3. The walker as recited in claim 1, wherein the walker further comprises means for retracting the seat assembly. 4. The walker as recited in claim 1, wherein the second end of the seat assembly is slidably mounted to the rear uprights. 5. The walker as recited in claim 4, wherein the second end of the seat assembly includes a plurality of dowels and the rear uprights each include a slot adapted to receive one of the plurality of dowels to guide the slidable mounting of the seat assembly. 6. The walker as recited in claim 1, wherein means for assisting the user in rising from the seat assembly further comprises means for assisting the user in lowering onto the seat assembly. 7. The walker as recited in claim 1, wherein an elevation of the upper frame assembly is variable relative to the lower frame assembly. 8. The walker as recited in claim 7, wherein the rear uprights comprise lower uprights, upper uprights slidably engaging the lower uprights, and means for retaining the upper uprights. 9. The walker as recited in claim 1, wherein the lower frame assembly further comprises a plurality of wheels. 10. The walker as recited in claim 1, wherein the second end of the seat assembly is pivotally mounted to the rear uprights. 11. The walker as recited in claim 10, wherein the second end of the seat assembly is pivotally mounted to the rear uprights by a plurality of bars. 12. The walker as recited in claim 11, wherein each of the plurality of bars comprise a first end pivotally mounted to the second end of the seat assembly and a second end pivotally mounted to the rear uprights. 13. The walker as recited in claim 1, wherein the means for assisting the user comprises at least one gas spring having a first end slidably mounted to the seat assembly and a second end pivotally mounted to the frame assembly. 14. The walker as recited in claim 13, wherein the first end of the at least one gas spring is slidably mounted in a slot in a side member of the seat assembly. 15. The walker as recited in claim 1, wherein the means for assisting the user comprises a plurality of gas springs, each of the plurality of gas springs having a first end slidably mounted to the seat assembly and a second end pivotally mounted to the frame assembly. 16. A posterior walker comprising: a frame assembly having: a lower frame assembly having a plurality of wheels; a plurality of uprights mounted to the lower frame assembly, the plurality of uprights comprising a plurality of front uprights and a plurality of rear uprights; and an upper frame assembly mounted to the plurality of uprights; two handles mounted to the upper frame assembly, the two handles positioned to assist a user when walking; a seat assembly having a first end pivotally mounted to the lower frame assembly by a plurality of bars, and a second end slidably mounted to slots in the rear uprights; and at least one gas spring having a first end comprising an extendable rod pivotally mounted to the seat assembly and a second end pivotally mounted to the lower frame assembly. 17. The walker as recited in claim 16, wherein the second end of the seat assembly includes a plurality of dowels and each of the slots of the rear uprights are adapted to receive one of the plurality of dowels to guide the slidable mounting of the seat assembly. 18. The walker as recited in claim 16, wherein an elevation of the upper frame assembly is variable relative to the lower frame assembly. 19. The walker as recited in claim 18, wherein the rear uprights comprise lower uprights, upper uprights slidably engaging the lower uprights, and means for retaining the upper uprights in the lower uprights at an elevation. 20. A walker comprising: a frame assembly having: a lower frame assembly adapted to contact the ground; a plurality of uprights mounted to the lower frame assembly, the plurality of uprights comprising a plurality of front uprights and a plurality of rear uprights: and an upper frame assembly mounted to the plurality of uprights; two handles mounted to the upper frame assembly, the two handles positioned to assist a user when walking; a seat assembly having a first end pivotally mounted to the frame assembly, and a second end slidably mounted to the rear uprights; and means for assisting the user in rising from the seat assembly. 21. The walker as recited in claim 20, wherein the second end of the seat assembly includes a plurality of dowels and the rear uprights each include a slot adapted to receive one of the plurality of dowels to guide the slidable mounting of the seat assembly. 22. The walker as recited in claim 20, wherein the means for assisting the user comprises at least one gas spring having a first end comprising an extendable rod pivotally mounted to the seat assembly and a second end pivotally mounted to the lower frame assembly. 23. The walker as recited in claim 20, wherein the walker further comprises means for retracting the seat assembly. 24. The walker as recited in claim 20, wherein the first end of the seat assembly is pivotally mounted to the frame assembly by a plurality of bars, each of the plurality of bars having a first end pivotally mounted to the first end of the seat assembly and a second end pivotally mounted to the frame assembly. 25. A walker comprising: a frame assembly having: a lower frame assembly adapted to contact the ground; a plurality of uprights mounted to the lower frame assembly, the plurality of uprights comprising a plurality of front uprights and a plurality of rear uprights, wherein the rear uprights comprise lower uprights, upper uprights slidably engaging the lower uprights, and means for retaining the upper uprights; and an upper frame assembly mounted to the plurality of uprights, wherein an elevation of the upper frame assembly is variable relative to the lower frame assembly; two handles mounted to the upper frame assembly, the two handles positioned to assist a user when walking; a seat assembly having a first end pivotally mounted to the frame assembly, and a second end mounted to the rear uprights; and means for assisting the user in rising from the seat assembly. 26. The walker as recited in claim 25, wherein the means for assisting the user comprises at least one gas spring having a first end comprising an extendable rod pivotally mounted to the seat assembly and a second end pivotally mounted to the lower frame assembly. 27. The walker as recited in claim 25, wherein the walker further comprises means for retracting the seat assembly. 28. The walker as recited in claim 25, wherein the first end of the seat assembly is pivotally mounted to the frame assembly by a plurality of bars, each of the plurality of bars having a first end pivotally mounted to the first end of the seat assembly and a second end pivotally mounted to the frame assembly. 29. The walker as recited in claim 25, wherein the second end of the seat assembly is pivotally mounted to the rear uprights. 30. The walker as recited in claim 29, wherein the second end of the seat assembly is pivotally mounted to the rear uprights by a plurality of bars. 31. The walker as recited in claim 30, wherein each of the plurality of bars comprise a first end pivotally mounted to the second end of the seat assembly and a second end pivotally mounted to the rear uprights. 32. The walker as recited in claim 25, wherein the means for assisting the user comprises at least one gas spring having a first end slidably mounted to the seat assembly and a second end pivotally mounted to the frame assembly. 33. The walker as recited in claim 32, wherein the first end of the at least one gas spring is slidably mounted in a slot in a side member of the seat assembly. 34. he walker as recited in claim 25, wherein the means for assisting the user comprises a plurality of gas springs, each of the plurality of gas springs having a first end slidably mounted to the seat assembly and a second end pivotally mounted to the frame assembly.