Multiply adjustable surgical retractor

Claim 2

A multiply adjustable surgical retractor comprising, a. a mounting shaft, a pair of arms mounted on the shaft at least one of the arms being movable latitudinally along the shaft, b. a tissue engaging hook depending from the free end of each of the arms, c. a central arm mounted on the shaft intermediate the first said arms, d. a retractor blade mounted on the free end of the central arm, e. the central arm being movable latitudinally along the shaft, pivotal about the axis of the shaft and extensible transverse to the axis of the shaft, f. means for locking the central arm on the shaft against all said movement simultaneously, and g. means for positively restraining the central arm from pivoting toward either of the first said arms.

Claim 3

A multiply adjustable surgical retractor comprising, a. a mounting shaft, a pair of arms mounted on the shaft at least one of the arms being movable latitudinally along the shaft, b. a tissue engaging hook depending from the free end of each of the arms, c. a central arm mounted on the shaft intermediate the first said arms, d. a retractor blade mounted on the free end of the central arm, e. the central arm being movable latitudinally along the shaft pivotal about the axis of the shaft, and extensible transverse to the axis of the shaft, and f. means for locking the central arm on the shaft against all said movement simultaneously, g. a clamp mounting the central arm to the shaft and providing means for locking the central arm against said movement, said clamp comprising, h. a generally u-shaped body member defining a pair of opposed legs spaced apart by a slot, the body member having a bore communicating with the slot, i. a split plug rotatably mounted in the bore, the plug having an opening through which the shaft extends, and j. means for drawing the legs toward each other, constricting the bore sufficiently to lock the plug sufficiently to lock in turn the shaft against axial movement with respect to the clamp.

Claim 4

A multiply adjustable surgical retractor comprising, a. a mounting shaft, a pair of arms mounted on the shaft at least one of the arms being movable latitudinally along the shaft, b. a tissue engaging hook depending from the free end of each of the arms, c. a central arm mounted on the shaft intermediate the first said arms, d. a retractor blade mounted on the free end of the central arm, e. the central arm being movable latitudinally along the shaft pivotal about the axis of the shaft, and extensible transverse to the axis of the shaft, and f. means for locking the central arm on the shaft against all said movement simultaneously, g. a clamp mounting the central arm to the shaft and providing means for locking the central arm against said movement, said clamp comprising, h. a generally u-shaped body member defining a pair of opposed legs spaced apart by a slot, the body member having a bore communicating with the slot, i. a split plug rotatably mounted in the bore, the plug having an opening through which the shaft extends, and j. means for drawing the legs toward each other, constricting the bore sufficiently to lock the plug sufficiently to lock in turn the shaft against axial movement with respect to the clamp.

Claim 5

A multiply adjustable surgical retractor comprising, a. the structure in accordance with claim 2 in which b. the central arm is slidably mounted on one leg of the clamp, and c. the said means for drawing the legs of the clamp toward each other simultaneously locks the central arm to the clamp against movement transverse to the shaft.

Claim 6

A multiply adjustable surgical retractor comprising, a. the structure in accordance with claim 3 in which b. the central arm has an axial slot, c. the leg of the clamp upon which the central arm is mounted has a transverse bore communicating with the said slot, d. the opposite leg of the clamp has a threaded bore in general axial registration with the said transverse bore, e. a thumb-screw extending through the slot in the central arm and the said transverse bore and threadably engaged to the threaded bore, and f. a radial enlargement on the thumb-screw lying above the central arm and engageable thereto upon tightening the thumb-screw in the threaded bore to lock the central arm against movement transverse to the shaft.

Claim 7

A multiply adjustable surgical retractor comprising, a. the structure in accordance with Claim 1 and b. a collar on each of said arms, each collar having a passage shaped in dimension to slidably receive the shaft, and c. resilient means associated with each collar frictionally engageable between the collar and the shaft restraining each collar against slidable movement along the axis of the shaft.

Claim 8

A multiply adjustable surgical retractor comprising, a. the structure in accordance with claim 2 and b. the central arm having an elongated, longitudinal, transverse slot, c. an upstanding pin on the leg of the said body member adjacent to the said central arm normally extending through the said slot therein, d. said means for drawing opposed legs of the body member together being bolt means threadably engaged to the leg of the body member most distant from the central arm, the bolt means extending through said slot and the arm of the body member adjacent to the central arm, e. the pin and bolt means being spaced apart along the slot, f. abutment means associated with the bolt means compressibly engageable with the central arm upon drawing the arms of the clamp member together to secure the said central arm against longitudinal movement in the direction of the slot, rotatable movement about the shaft and latitudinal movement in the direction of the axis of the shaft simultaneously.

Claim 9

A multiply adjustable surgical retractor comprising, a. a mounting shaft, a pair of arms mounted on the shaft at least one of said arms being movable latitudinally along the shaft, b. a tissue engaging hook depending from the free end of each of said arms, c. clamp means movably mounted on the shaft, the clamp means being pivotal about the axis of the shaft and latitudinally movable along the axis of the shaft simultaneously, d. a central arm mounted on the clamp means spaced away from the shaft, e. the central arm being extensible on the clamp means transverse to the axis of the shaft, and f. means for simultaneously securing the central arm to thE clamp means and the clamp means to the shaft against relative movement with respect to each other.

Claim 10

A multiply adjustable surgical retractor comprising, a. a mounting shaft, a pair of arms mounted on the shaft at least one of said arms being movable latitudinally along the shaft, b. a tissue engaging hook depending from the free end of each of said arms, c. clamp means movably mounted on the shaft, the clamp means being pivotal about the axis of the shaft and latitudinally movable along the axis of the shaft simultaneously, d. a central arm mounted on the clamp means spaced away from the shaft, e. the central arm being extensible on the clamp means transverse to the axis of the shaft, and f. means for simultaneously securing the central arm to thE clamp means and the clamp means to the shaft against relative movement with respect to each other.