Source: http://www.google.co.uk/patents/US7513408
Timestamp: 2017-12-11 07:49:15
Document Index: 373938366

Matched Legal Cases: ['Application No. 05254700', 'Application No. 05254681', 'Application No. 05254703', 'Application No. 05254699', 'Application No. 05254680', 'Application No. 05254685', 'Application No. 05254694', 'Application No. 05254695', 'Application No. 06255053', 'Application No. 06255057', 'Application No. 06255058', 'Application No. 06255062', 'Application No. 06255064', 'Application No. 06255065', 'Application No. 11', 'Application No. 11', 'Application No. 11', 'Application No. 11', 'Application No. 11', 'Application No. 11', 'Application No. 11', 'Application No. 11', 'Application No. 11', 'Application No. 11', 'Application No. 11', 'Application No. 11']

Patent US7513408 - Multiple firing stroke surgical instrument incorporating electroactive ... - Google Patents
A surgical stapling and severing instrument particularly suited to endoscopic procedures incorporates a handle that produces separate closing and firing motions to actuate an end effector. In particular, the handle produces multiple firing strokes in order to reduce the required amount of force required...http://www.google.co.uk/patents/US7513408?utm_source=gb-gplus-sharePatent US7513408 - Multiple firing stroke surgical instrument incorporating electroactive polymer anti-backup mechanism
Publication number US7513408 B2
Application number US 11/181,046
Also published as DE602005021583D1, EP1621140A2, EP1621140A3, EP1621140B1, US20060060630
Publication number 11181046, 181046, US 7513408 B2, US 7513408B2, US-B2-7513408, US7513408 B2, US7513408B2
Inventors Frederick E. Shelton, IV, Kenneth S. Wales
Patent Citations (108), Non-Patent Citations (52), Referenced by (267), Classifications (12), Legal Events (6)
US 7513408 B2
The version of FIG. 4 differs in that the resilient member 60 comprises an anti-backup compression spring 60 a having a narrow distal coil 78 that grips and is distally constrained by a narrowed portion 80 of a firing rod 25 a. The anti-backup compression spring 60 a also has a widened proximal coil 82 sized to contact the anti-backup locking plate 56. Thus, the anti-backup compression spring 60 a provides a full-time locking bias that is overcome by distal movement of the firing rod 25 a or the anti-backup cam tube 72 a.
In FIG. 3A, the EAP actuators 74, 76 have a relaxed, contracted shape which allows the proximal urging of the resilient member 60 against the anti-backup locking plate 56 to push the anti-backup cam tube 70 proximally to the handle housing 26. When the EAP actuators 74, 76 are energized, the EAP actuators 74, 76 longitudinally expand as depicted in phantom, distally advancing the anti-backup cam tube 70, also depicted in phantom. It is contemplated that the version of FIG. 2-3, 3A may be configured with the resilient member 60 formed from an EAP actuator having a relaxed, contracted state and an activated, expanded state (e.g., a cylindrical stacked EAP laminate with a through hole configured to longitudinally expanded when electrically stimulated). Thus, the locking bias may be selectively removed to reduce the force to fire. The firing trigger 32 requires less force to move the locking plate 56 against the resilient member 60. Alternatively, the resilient member 60 may have a relaxed contracted state and an activated expanded state. Moreover, the resilient member 60 may be a combination compression spring longitudinally wrapped in EAP fiber actuators or be assisted and/or constrained by an EAP stacked laminate actuator.
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9 EPO Search Report, Application No. 05254695.9, Jan. 12, 2006, pp. 1-5.
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U.S. Classification 227/175.2, 227/175.1, 227/19, 227/175.4, 606/219
International Classification A61B17/39
Cooperative Classification A61B2017/00871, A61B2017/00398, A61B2017/00407, A61B17/2909, A61B17/07207
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SHELTON, FREDERICK E., IV;WALES, KENNETH S.;REEL/FRAME:016632/0529;SIGNING DATES FROM 20050707 TO 20050808