Machine element or mechanism – Control lever and linkage systems – Hand operated
Patent
1977-08-09
1979-12-18
Truluck, Dalton L.
Machine element or mechanism
Control lever and linkage systems
Hand operated
403166, 128751, 128303R, F16C 110, A61B 500, A61B 1700, F16B 710
Patent
active
041788109
ABSTRACT:
The manipulator end of an endoscopic tissue sampling instrument, such as a forceps, comprises a plunger 4 slidably disposed within a slotted support tube 3 and movable via a finger sleeve 6 surrounding the tube and coupled to the plunger. A control wire 1 extends through an inner coil 10 and a surrounding outer coil 8; the adjoining ends of the coils within the support tube are brazed or welded together at 13, and the other end of the outer coil is secured to the end of the support tube by set screws 9. An end stop 2 is attached to the end of the control wire and is normally seated against one end of a cavity 5 within the plunger by a spring 7. If excessive tension is exerted on the control wire in manipulating the instrument the outer coil 8 expands in a spring-like manner to prevent any breakage or damage; if excessive compression is exerted the end stop spring yields to allow the stop to unseat and move within the cavity.
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patent: 3186745 (1965-06-01), Lyles
patent: 3552384 (1971-01-01), Pierie
Shedd C. W.
Truluck Dalton L.
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