초록 ▼

A body support ratcheting mechanism for a medical or dental chair or stool. The body support ratcheting mechanism includes a shaft that is attached to the chair or stool. A body support member is attached to the top or upper surface of the mechanism. Within the mechanism a ratchet, mounted to the sh

A body support ratcheting mechanism for a medical or dental chair or stool. The body support ratcheting mechanism includes a shaft that is attached to the chair or stool. A body support member is attached to the top or upper surface of the mechanism. Within the mechanism a ratchet, mounted to the shaft, and a pawl, mounted within the mechanism housing, allow the body support member to be pivoted toward the abdomen of the chair occupant to a comfortable position. When the occupant leans against the body support ratcheting mechanism, the body support is held in position by the interlocking contact of the pawl and a ratchet gear tooth. For ease of egress from and ingress to the chair, the occupant can depress a spring biased release arm that allows for the body support member to be swung away from the chair.

대표청구항 ▼

[ What is claimed is:] [1.] A body support member for supporting a body resting upon a stool, the body support member being adapted to be mounted pivotably relative to said stool and including: a ratcheting mechanism for locking said support member in a selected pivotable position, said ratcheting m

[ What is claimed is:] [1.] A body support member for supporting a body resting upon a stool, the body support member being adapted to be mounted pivotably relative to said stool and including: a ratcheting mechanism for locking said support member in a selected pivotable position, said ratcheting mechanism comprising:a ratchet housing attached to said body support member and having at least one wall arranged to define an open cavity;a top and a bottom bearing plate, said plates being disposed above and below said ratchet housing respectively;a shaft having a first end and a second end, said first end is adapted to be attached to said stool;a ratchet gear having a plurality of ratchet teeth, said ratchet gear being mounted on the second end of said shaft; anda pawl having a pawl engagement member, a pivot point, and a release handle, said pawl being pivotally mounted between said top bearing plate and said bottom bearing plate and said pawl engagement member being engageable with at least one tooth of said ratchet gear teeth.