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US4944093A Expired / Lapsed US ⏱️ 0.0 years remaining

Forceps with shearing jaws

Assignee: Richard Wolf GmbH
•
Filing: 1988-10-24
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Granted: 1990-07-31
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Expires: 2008-10-24
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Abstract

Abstract A forceps and in particular hooked shears, has a distal extremity of the forceps shaft provided with a recess of the one fixed branch of the forceps jaws, with which branch there co-operates a double-armed pivotally displaceable jaw branch by means of a scissors grip and a push and pull rod. The recess of the fixed jaw branch is continued by a shaft slot whereof the delimiting edge forms a stop for a stepped surface of the push and pull rod placed in impingement in the closed position of the jaws and the open position of the jaws is restricted by impingement of a surface of the pivotable jaw branch against the top distal edge of the push rod.

Inventors

  • 👤 Ernst Falk

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 00:52
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/1604; A61B17/1606; A61B17/1608; A61B90/00; A61B90/03; A61B2090/033

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 280 words
A forceps, in particular shears, comprising a tubular shaft having a recess transversing a distal end of the shaft from top to bottom to form a stationary shearing jaw, a scissors grip being mounted at a proximal end of the shaft, a push and pull rod extending in said shaft having a proximal end connected to a movable handle of the scissors grip, a movable shearing jaw being mounted on the stationary jaw by a transverse spindle for pivotable movement, said movable jaw being pivotably connected to a distal end of the push and pull rod to move between a closed position received in said recess and an opened position as said movable handle is moved, first stop means for defining the closed position comprising a step on the push and pull rod engaging an edge provided on said shaft adjacent the distal end thereof, and second stop means for defining the opened position comprising a stop edge on said movable jaw coating with a stop surface on said push and pull rod, said recess having a bottom portion extending proximally from the spindle to form a bottom shaft slot having a proximal edge forming said edge on said shaft of the first stop means, said push and pull rod having a flattened distal extension received in said slot, said step being provided on said extension and said stop surface being formed by an upper edge of said extension, said movable jaw at a proximal end having a bifurcating recess receiving a distal end of the flattened distal extension of the push and pull rod, said bifurcating recess having a base surface forming said stop edge of the movable jaw.
Claim 2
Dependent Claim 280 words
A forceps, in particular shears, comprising a tubular shaft having a recess transversing a distal end of the shaft from top to bottom to form a stationary shearing jaw, a scissors grip being mounted at a proximal end of the shaft, a push and pull rod extending in said shaft having a proximal end connected to a movable handle of the scissors grip, a movable shearing jaw being mounted on the stationary jaw by a transverse spindle for pivotable movement, said movable jaw being pivotably connected to a distal end of the push and pull rod to move between a closed position received in said recess and an opened position as said movable handle is moved, first stop means for defining the closed position comprising a step on the push and pull rod engaging an edge provided on said shaft adjacent the distal end thereof, and second stop means for defining the opened position comprising a stop edge on said movable jaw coating with a stop surface on said push and pull rod, said recess having a bottom portion extending proximally from the spindle to form a bottom shaft slot having a proximal edge forming said edge on said shaft of the first stop means, said push and pull rod having a flattened distal extension received in said slot, said step being provided on said extension and said stop surface being formed by an upper edge of said extension, said movable jaw at a proximal end having a bifurcating recess receiving a distal end of the flattened distal extension of the push and pull rod, said bifurcating recess having a base surface forming said stop edge of the movable jaw.

References Cited (Backward Citations)

DE245402C Cited
CH382369A Cited
US3585985A Cited
DE8316034U1 Cited
US4569131A Cited
US4785825A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1993-07-30 1994-01-29 1994-07-31 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1997-07-30 1998-01-29 1998-07-31 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2001-07-30 2002-01-29 2002-07-31 $7700.00 Window Closed / Lapsed

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