Surgical instrument locking mechanism
First Claim
1. An endoscopic or laparoscopic surgical instrument comprising:
- a handle assembly including a barrel portion, a stationary handle, and a pivoting handle;
a body assembly having a pair of coaxial members attached at one end to said handle assembly, including an inner rod member slidable within an outer tube member in response to movement of said pivoting handle of said handle assembly, said body assembly terminating at an end remote from said handle assembly at which end is provided a reciprocatingly movable tool mechanism; and
locking means positioned within said barrel portion of said handle assembly including a locking block and a latch member selectively engagable and disengagable with said locking block to lock said tool mechanism, said locking means being actuable independent of the movement of said pivoting handle.
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Accused Products
Abstract
An endoscopic or laparoscopic surgical instrument having an internally disposed locking mechanism located within a barrel portion of a handle assembly. The instrument includes a handle assembly having a pivoting handle and a stationary handle, a barrel portion to which an elongated body assembly is secured, and a locking mechanism for releasably positioning a tool mechanism located at the distal end of the body assembly. In one embodiment the locking mechanism comprises a trigger, a brake and a latch spring. In another embodiment the locking mechanism comprises a latch spring and a locking block. A rotational knob and locking member may also be provided to position the body assembly at various orientations to the longitudinal axis.
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Citations
23 Claims
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1. An endoscopic or laparoscopic surgical instrument comprising:
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a handle assembly including a barrel portion, a stationary handle, and a pivoting handle; a body assembly having a pair of coaxial members attached at one end to said handle assembly, including an inner rod member slidable within an outer tube member in response to movement of said pivoting handle of said handle assembly, said body assembly terminating at an end remote from said handle assembly at which end is provided a reciprocatingly movable tool mechanism; and locking means positioned within said barrel portion of said handle assembly including a locking block and a latch member selectively engagable and disengagable with said locking block to lock said tool mechanism, said locking means being actuable independent of the movement of said pivoting handle. - View Dependent Claims (2)
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3. An endoscopic or laparoscopic surgical instrument comprising:
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a handle assembly including a barrel portion, a stationary handle, and a pivoting handle; a body assembly having a pair of coaxial members attached at one end to said handle assembly, including an inner rod member slidable within an outer tube member in response to movement of said pivoting handle of said handle assembly, said body assembly terminating at an end remote from said handle assembly at which end is provided a reciprocatingly movable tool mechanism; and locking means positioned within said barrel portion of said handle assembly including a locking block and a latch member selectively engagable and disengagable with said locking block to lock said tool mechanism, said locking means further including braking means for selectively engaging said inner rod member, said locking means being actuable independent of the movement of said pivoting handle. - View Dependent Claims (4)
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5. An endoscopic or laparoscopic surgical instrument comprising:
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a handle assembly including a barrel portion, a stationary handle, and a pivoting handle for incrementally opening and closing a tool mechanism; a body assembly extending from said handle assembly and including an inner rod member coaxially disposed within an outer tube member, said inner rod member reciprocatingly slidable within said outer tube in response to movement of said pivoting handle, said body assembly terminating at an end remote from said handle assembly at which end is provided a reciprocatingly movable tool mechanism; and a locking mechanism positioned within said barrel portion of said handle assembly for selectively locking said tool mechanism, said locking mechanism including braking means for engaging said inner rod member, a spring biased trigger member for controlling said braking means, and a latch member cooperatively associated with said trigger member for selectively latching said trigger member. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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12. An endoscopic or laparoscopic surgical instrument comprising:
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a handle assembly including a barrel portion, a stationary handle, and a pivoting handle; a body assembly having a pair of coaxial members attached at one end to said handle assembly, including an inner rod member slidable within an outer tube member in response to actuation of said pivoting handle, said body assembly terminating at an end remote from said handle assembly at which end is provided a reciprocatingly movable tool mechanism; and a locking mechanism positioned within said barrel portion of said handle assembly, said locking mechanism including a locking block secured to said inner rod member and having a camming surface, said locking mechanism further including a latch member selectively engagable with said camming surface of said locking block for selectively locking said tool mechanism upon actuation of said pivoting handle; wherein said locking block is movable a first distance in a first direction to engage said latch member with said camming surface, and is movable a second distance in said first direction to disengage said latch member from said camming surface. - View Dependent Claims (13, 14, 15, 16)
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17. In combination, a handle assembly and a body assembly for endoscopic and laparoscopic surgical instruments, said body assembly being secured to said handle assembly at a proximal end of said body assembly and having a reciprocatingly openable and closable tool mechanism secured at a distal end of said body assembly;
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said body assembly comprising; a) an outer tube member, b) an inner rod member coaxially slidable within said outer tube member; and said handle assembly comprising; a) a pivotable handle for actuation of said inner rod member; b) a stationary handle adjacent said pivotable handle; c) a barrel portion for receiving said body assembly; and d) a locking mechanism positioned within said barrel portion for engaging said inner rod member, said locking mechanism including a locking block and a latch member selectively engagable and disengagable with said locking block to selectively lock said tool mechanism in a plurality of positions, said locking mechanism further including a brake member which engages said inner rod member to lock said tool mechanism; such that movement of said inner rod member within said outer tube member a first distance in a first direction locks said locking mechanism, and movement of said inner rod member a second distance in said first direction releases said locking, mechanism. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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Specification