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US 6,017,342 AGranted
Compression and distraction instrument
AssigneeBeere Precision Medical Instrumnets, Inc.
InventorJames A. Rinner
Life of this patent
Estimating the term…
Abstract
A compression and distraction instrument having two pivotally connected handles. Jaw portions engage objects, such as human bone, for purposes of maneuvering. A control screw connects with the handles, through a mechanical advantage arrangement, and the screw pivots the jaw portions for the engagement of the objects. There is an anti-friction connection between the screw and the handles, for accurate and precise movement of the jaws. In one embodiment, the screw is axial of the instrument, and, in the other embodiment, the screw is transverse thereto, both have mechanical advantage.
Claims27
An instrument for compression and distraction of objects comprising
- two elongated first and second handles,
- a pivot pin pivotally connecting said handles together at a location intermediate the length of said handles,
- said handles being arranged to have hand grip portions thereon disposed to one side of said pivot pin and to have jaw portions thereon disposed to the side of said pivot pin opposite from said one side whereby said jaw portions move toward and away from each other when said handles are respectively moved toward and away from each other,
- said jaw portions having terminal ends extending away from said pivot pin,
- a first additional jaw pivotally connected to said hand grip portion of said first handle and pivotally connected to said jaw portion of said second handle, and a second additional jaw pivotally connected to said hand grip portion of said second handle and pivotally connected to said jaw portion of said first handle, and with said additional jaws extending beyond said terminal ends of said jaw portions in the direction away from said pivot pin and having gripping surfaces for gripping objects between said surfaces,
- said additional jaws being pivotally connected to said handles for the pivoting of said handles about said pivot pin,
- a screw supported relative to said pivot pin and extending between said handles,
- a nut threadedly mounted on said screw, and
- a lever pivotally connected with said nut and each of said grip portions and arranged to move said grip portions toward and away from each other upon turning of said screw.
6 more elements
An instrument for compression and distraction of objects comprising
- two elongated first and second handles,
- a pivot pin pivotally connecting said handles together at a location intermediate the length of said handles,
- said handles being arranged to each have hand-grip portions thereon disposed to one side of said pivot pin and to have jaw portions thereon to the side of said pivot pin opposite from said one side whereby said jaw portions move toward and away from each other when said hand-grip portions are respectively moved toward and away from each other,
- a first additional jaw pivotally connected to said hand-grip portion of said first handle and pivotally connected to said jaw portion of said second handle, and with those two pivot connections being on opposite sides of and equally spaced from said pivot pin, and a second additional jaw pivotally connected to said hand-grip portion of said second handle and pivotally connected to said jaw portion of said first handle, and with those two pivot connections being on opposite sides of and equally spaced from said pivot pin, and with each of said additional jaws having distal ends extending away from said pivot pin to a location beyond said jaw portions for engagement of objects,
- each of said distals ends having surfaces on each opposite side thereof for engagement of objects in the respective compression and distraction of said objects,
- said pivot pin and said pivot connections of each of said additional jaws being connected to said handles in positions to form a straight line along said connections and said pivot pin and to accommodate pivoting of said handles about said pivot pin,
- a screw supported relative to said pivot pin and extending between said handles,
- a nut threadedly mounted on said screw and being movable therealong upon turning of said screw, and
- a lever pivotally connected with said nut and each of said hand-grip portions and arranged to move said hand-grip portions toward and away from each other upon turning of said screw for either compression or distraction of objects.
6 more elements
An instrument for compression and distraction of objects comprising
- two elongated first and second handles,
- a pivot pin pivotally connecting said handles together at a location intermediate the length of said handles,
- said handles being arranged to each have hand-grip portions thereon disposed to one side of said pivot pin and to have jaw portions thereon to the side of said pivot pin opposite from said one side whereby said jaw portions move toward and away from each other when said hand-grip portions are respectively moved toward and away from each other,
- a first additional jaw pivotally connected to said hand-grip portion of said first handle and pivotally connected to said jaw portion of said second handle, and with those two pivot connections being on opposite sides of and equally spaced from said pivot pin, and a second additional jaw pivotally connected to said hand-grip portion of said second handle and pivotally connected to said jaw portion of said first handle, and with those two pivot connections being on opposite sides of and equally spaced from said pivot pin, and with each of said additional jaws extending away from said pivot pin to a location beyond said jaw portions for engagement of objects,
- a screw pivotally attached to said hand-grip portion of said first one of said handles and extending to said hand-portion of said second one of said handles, and
- a nut on said screw and engaged with said hand-grip portion of said second one of said handles and being connected thereto for movement of said hand-grip of said second handle in both directions along the extent of said screw, and being in an arrangement whereby turning of said screw causes said nut to move along said screw and thereby move said hand-grip portions toward or away from each other.
3 more elements
An instrument for compression and distraction of objects comprising:
- a pair of pivotally connected handles having a pivot axis and having hand-grip portions to one side of said pivot axis and having jaw portions to the other side of said pivot axis,
- two pairs of surfaces on said jaw portions for gripping work-piece objects and with said surfaces of a first one of said pairs facing each other and with said surfaces of a second one of said pairs facing away from each other, with said first and said second pairs being arranged for respective compression and distraction of the work-piece objects,
- a screw pivotally connected with said handles and having a longitudinal axis,
- a nut threadedly mounted on said screw and being connected to said handles in an arrangement to be restrained from rotation and thereby induce movement of said nut along said axis of said screw in both directions therealong and upon rotation of said screw, and
- said nut being operatively connected to said handles to transmit the movement of said nut along said screw in both said directions and to said hand-grip portions to achieve the compression and distraction operation.
2 more elements
Dependencies are inferred from the claim text.