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US 5,792,046 AGranted
Cammed retractor clamp
AssigneeMinnesota Scientific, Inc.
InventorWalter Dobrovolny
Life of this patent
Estimating the term…
Abstract
A surgical support structure joint includes a shaft having an axis, a first support member rotatably supported about the axis of the shaft and a camming member coupled to the first support member. The camming member is movable between a first clamped position and a second unclamped position. In the first clamped position, the camming member applies greater force to the first support member than in the second unclamped position to prevent rotation of the first support member in the first clamped position and to permit rotation of the first support member in the second unclamped position.
Claims18
A surgical support structure joint comprising:
- a shaft having an axis;
- a first support member rotatably supported about the axis of the shaft;
- a camming member coupled to the first support member, the camming member being movable between a first clamping position and a second nonclamping position, wherein the camming member applies greater force to the first support member in the first clamping position than in the second nonclamping position to prevent rotation of the first support member in the first clamping position and to permit rotation of the first support member in the second nonclamped position;
- and
- a collar encircling the shaft in engagement with the first clamping member, wherein the camming member comprises a camming pin journaled to the collar through the shaft and wherein the camming pin includes an eccentric outer circumferential surface in engagement with the shaft for forcing the collar along the shaft towards the first support member.
2 more elements
A surgical support structure joint comprising:
- a first support member;
- a shaft extending through the support member for pivotally supporting the first support member, the first shaft having a first end and a second end;
- and
- a clamp for clamping the support member in a selected position about the shaft, the clamp including:
- a retaining member coupled to the first end of the shaft in forceful engagement with the first support member;
- a collar encircling the shaft in forceful engagement with the support member;
- and
- a camming pin journaled to the collar through the shaft, wherein the camming pin includes an eccentric outer circumferential surface in engagement with the shaft for moving the shaft relative to the collar, wherein rotation of the camming pin moves the collar and the retaining member between a first position and a second position relative to one another, wherein the collar and the retaining member frictionally clamp the first support member therebetween to prevent rotation of the first support member in the first position and wherein the collar and the head permit rotation of the first support member about the shaft in the second position.
5 more elements
A surgical support apparatus comprising:
- a first clamping member having substantially U-shaped unitary body including a first pair of resilient leg portions, the first pair of leg portions having first aligned pivot bores and defining a first clamping bore between the first pair of resilient leg portions;
- a second clamping member having a substantially U-shaped unitary body including a second pair of resilient leg portions, the second pair of leg portions having second aligned pivot bores and defining a second clamping bore between the second pair of resilient leg portions;
- a bolt extending through the first and second aligned pivot bores of the first clamping member and the second clamping member, respectively, wherein the first clamping member and the second clamping member pivot about the bolt for supporting a first rod section and a second rod section, respectively, in selected rotational positions about the bolt;
- and
- a camming mechanism for clamping the first rod within the first clamping bore and the second rod within the second clamping bore and for clamping the first and second members in selected rotational positions about the bolt, the camming mechanism including:
- a retaining member coupled to the bolt in forceful engagement with the first clamping member;
- a collar encircling the bolt in forceful engagement with the second clamping member;
- and
- a camming pin journaled to the collar through the bolt, the camming pin having an eccentric outer circumferential surface which engages the bolt, wherein rotation of the camming pin moves the collar and the retaining member towards one another to clamp the first rod within the first clamping bore, to clamp the second rod within the second clamping bore and to clamp the first and second clamping members between the retaining member and the collar to prevent rotation of the first and second clamping members about the bolt.
6 more elements
Dependencies are inferred from the claim text.