Ratchet assembly for surgical instrument
First Claim
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1. A ratchet assembly for a surgical instrument, comprising:
- a bar having teeth;
a pawl having a member for engaging said teeth, said bar being movable relative to said pawl in two directions along an axis, and said pawl being pivotable between a first ratchet position for allowing movement of said bar relative to said pawl in a first direction along said axis and a second ratchet position for allowing movement of said bar relative to said pawl in a second direction along said axis; and
a toggle member associated with said pawl and said bar for selectively allowing pivot of said pawl between said first ratchet position and said second ratchet position.
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Abstract
A ratchet assembly for a surgical instrument includes a bar having teeth; a pawl having a member for engaging the teeth, the bar being movable relative to the pawl in two directions along an axis, and the pawl being pivotable between a first ratchet position for allowing movement of the bar relative to the pawl in a first direction along the axis and a second ratchet position for allowing movement of the bar relative to the pawl in a second direction along the axis; and a toggle member associated with the pawl and the bar for allowing pivot of the pawl between the first ratchet position and the second ratchet position.
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Citations
17 Claims
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1. A ratchet assembly for a surgical instrument, comprising:
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a bar having teeth; a pawl having a member for engaging said teeth, said bar being movable relative to said pawl in two directions along an axis, and said pawl being pivotable between a first ratchet position for allowing movement of said bar relative to said pawl in a first direction along said axis and a second ratchet position for allowing movement of said bar relative to said pawl in a second direction along said axis; and
a toggle member associated with said pawl and said bar for selectively allowing pivot of said pawl between said first ratchet position and said second ratchet position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A ratchet assembly, comprising:
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a bar having teeth; a pawl having a tooth engaging member for engaging said teeth, said pawl having a triangular configuration defined by said tooth engaging member, a first pivot member spaced from said tooth engaging member, and a second pivot member spaced from said tooth engaging member and said first pivot member, said bar being moveable relative to said pawl in two directions along an axis; and means for positioning said pawl relative to said bar in a neutral position and allowing pivot of said pawl around said first pivot member to a first ratchet position allowing movement of said bar relative to said pawl in one of said two directions, and allowing pivot of said pawl around said second pivot member to a second ratchet position allowing movement of said bar relative to said pawl in the other of said two directions.
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14. A surgical instrument having a two-directional ratcheting structure, comprising:
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a housing; an operable element connected to said housing; an actuating member moveably mounted relative to said housing for operating said operable element; and a ratchet assembly associated with said actuating member for allowing alternating two-directional ratcheting of said actuating member relative to said housing, said ratchet assembly comprising; a bar having teeth; a pawl having a member for engaging said teeth, said bar being movable relative to said pawl in two directions along an axis, and said pawl being pivotable between a first ratchet position for allowing movement of said bar relative to said pawl in a first direction along said axis and a second ratchet position for allowing movement of said bar relative to said pawl in a second direction along said axis; and a toggle member associated with said pawl and said bar for allowing pivot of said pawl between said first ratchet position and said second ratchet position. - View Dependent Claims (15, 16, 17)
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Specification