Crank retractor handle
The present invention relates to an apparatus for adapting a non-cylindrical serrated surgical retractor blade handle to the cylindrical bore of a universal joint. The apparatus includes an adaptor housing having a retractor handle passageway, at least a portion of the retractor handle passageway being configured to receive the slideable insertion of a non-cylindrical retractor blade handle. The adaptor housing is configured for rotational insertion into the cylindrical bore of a clamping member, thereby allowing the adaptor housing, the non-cylindrical retractor blade handle, and an attached retractor blade, to rotate about the longitudinal axis of the non-cylindrical retractor blade handle. In the illustrated embodiment, a pawl mechanism is connected to the adaptor housing and configured for automatic engagement with at least one of a plurality of serrations that are located on the non-cylindrical retractor blade handle, thereby allowing for the efficient adjustment and automatic locking of the linear position of the non-cylindrical retractor blade handle relative to the operative site.
1. A universal clamping joint comprising:
a first clamping member having a clamping bore;
a non-cylindrical retractor blade handle, the non-cylindrical retractor blade handle having a plurality of serrations;
an adapter housing having a retractor handle passageway and a sleeve, at least a portion of the sleeve being configured for rotational insertion into the clamping bore, at least a portion of the retractor handle passageway having a non-cylindrical configuration sized to receive the slideable insertion of the non-cylindrical retractor blade handle and to prevent the rotation of the non-cylindrical retractor blade handle within the adapter housing;
a pinion operably connected to the adaptor housing, the pinion having a plurality of pinion teeth, the pinion teeth being configured for engagement with at least one of the plurality of serrations;
a locking mechanism operably connected to the first clamping member, the locking mechanism being movable between an unclamped position and a clamped position, the clamped position being capable of imposing a clamping force on the clamping bore to prevent the rotation of the adaptor housing within the clamping bore; and
a pawl mechanism operably connected to the adaptor housing, the pawl mechanism being configured for both a releasable engagement and a locking engagement with at least one of the plurality of serrations.
2. A universal clamping joint comprising:
a first clamping member having a clamping bore;
a non-cylindrical retractor blade handle, the non-cylindrical retractor blade handle having a plurality of serrations;
an adapter housing having a retractor handle passageway and a sleeve, at least a portion of the sleeve being configured for rotational insertion into the clamping bore, at least a portion of the retractor handle passageway having a non-cylindrical configuration sized to receive the slideable insertion of the non-cylindrical retractor blade handle and to prevent the rotation of the non-cylindrical retractor blade handle within the adapter housing;
a pinion operably connected to the adaptor housing, the pinion having a plurality of pinion teeth, the pinion teeth being configured for engagement with at least one of the plurality of serrations;
a crank knob operably connected to the pinion, the rotation of the crank knob facilitating the rotation of the plurality of pinion teeth and subsequent engagement of at least one of the plurality of pinion teeth with at least one of the plurality of serrations;
a locking mechanism operably connected to the first clamping member, the locking mechanism being movable between an unclamped position and a clamped position, the clamped position being capable of imposing a clamping force on the clamping bore to prevent the rotation of the adaptor housing within the clamping bore; and
a pawl mechanism operably connected to the adaptor housing, the pawl mechanism being configured for both a releasable engagement and a locking engagement with at least one of the plurality of serrations.
3. The apparatus of claim 1 or 2 wherein a spring pin is operably connected to the pawl mechanism, the spring pin being configured to bias the pawl mechanism against at least one of the plurality of serrations.
4. The apparatus of claim 1 or 2 wherein at least a portion of the retractor handle passageway is a cylindrical orifice.
5. The apparatus of claim 1 or 2 wherein the locking mechanism is a cam locking mechanism, the cam locking mechanism having a cam handle and a cam.
6. The apparatus of claim 5 wherein the locking mechanism engages a through rod and a nut.
7. The apparatus of claim 5 wherein the cam handle has an unclamped position and a clamping position, the unclamped position and the unclamped position of the cam handle being configured to be substantially parallel to the non-cylindrical retractor blade handle.
8. The apparatus of claim 1 or 2 wherein a second clamping member is rotatably connected to the first clamping member, the second clamping member and the first clamping member being capable of rotational movement about the same axis.