External fixation device
OwnerWilliam M. Murrayinventor
Life of this patent
Estimating the term…
Abstract
An external fixation device for holding bone segments in known relation to each other includes a pair of bone clamp assemblies each secured to bone pins extending from the bone segments, a bridge extending between the pin clamp assemblies and a specialized high friction universal assembly connecting the bridge to each of the pin clamp assemblies.
Claims32
An external fixation device for securing bone segments in known relation to each other comprising two pin clamp assemblies adapted to engage bone pins extending from bone segments, a bridge extending between the pin clamp assemblies and two adjustable assemblies each joining the bridge to a pin clamp assembly, at least one of the adjustable assemblies including a pair of members, a clamp on one member adjustably securing such member to the bridge and a clamp on the other member adjustably securing such member to one pin clamp assembly, each member including a clamp surface engagable with the clamp surface on the other member for locking the two members together, spring means biasing the clamps toward open positions and a common operator joining the members together with the clamp surfaces facing each other, said operator engaging said clamps such that acutation of the operator compresses the spring means, closes the clamps and forces said surfaces against each other to form a rigid connection between the bridge and the one pin clamp assembly.
An external fixation device for securing bone segments in known relation to each other comprising a pair of pin clamp assemblies;
- a bridge extending between the pin clamp assemblies;
- a pair of adjustable assemblies joining the bridge to the pin clamp assemblies;
- the pin clamp assemblies including a number of clamp members engaging bone pins extending from bone segments;
- at least one clamp member including a stem, a clamp on the stem engaging another part of the pin clamp assembly and having a clamp leg overlying one end of the stem, a bone pin clamp at the other end of the stem and an operator engaging the clamp leg and bone pin clamp whereby actuation of the operator tightens both the clamp and bone pin clamp to rigidly secure the bone pin to the pin clamp assembly, and spring means between the one end of the stem and the clamp leg biasing the clamp leg away from the stem and the bone pin clamp closed.
An external fixation device for securing bone segments in known relation to each other comprising two pin clamp assemblies adapted to engage bone pins extending from bone segments, a bridge extending between the pin clamp assemblies and two adjustable assemblies each joining the bridge to a pin clamp assembly, at least one of the adjustable assemblies including a pair of members, a clamp on one member adjustably securing such member to the bridge and a clamp on the other member adjustably securing such member to one pin clamp assembly, each member including at least one clamp leaf having flat, parallel friction surfaces and a common operator joining the members together with the leaves intermeshed and friction surfaces engaging each other, said operator engaging said clamps such that actuation of the operator closes the clamps and forces said friction surfaces against each other to form a rigid connection between the bridge and the one pin clamp assembly.
An external fixation device for securing bone segments in a known relation to each other comprising two pin clamp assemblies adapted to engage bone pins extending from bone segments, a bridge extending between the pin clamp assemblies, two adjustable assemblies each joining the bridge to a pin clamp assembly, each adjustable assembly including a first adjustable clamp engageable with the bridge and a second adjustable clamp engagable with a pin clamp assembly, at least one clamp of one adjustable assembly including a band clamp having a free clamp leg separated from the remainder of the adjustable assembly by a slot, an operator engagable with said free leg to move the leg toward the remainder of the adjustable assembly so as to tighten the band clamp and a spring confined within said slot operable to bias said clamp open.
Dependencies are inferred from the claim text.