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The ornamental design for a ratchet mechanism for a surgical retractor assembly, as shown and described. |
FIG. 1 is a perspective view of a ratchet mechanism for a surgical retractor assembly showing our new design, the toothed ratchet is shown in broken lines for clarity and forms no part of the invention;
FIG. 2 is a perspective view of the ratchet mechanism for a surgical retractor assembly in the open position;
FIG 3 is a perspective view of the ratchet mechanism for a surgical retractor assembly the pawl in closed position;
FIG. 4 is a sectional view taken along line 4--4 in FIG. 1;
FIG. 5 is a sectional view taken along line 5--5 in FIG. 4; and,
FIG. 6 is an exploded perspective view of the ratchet mechanism for a surgical retractor assembly.
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