Self-hinging disposable retractor instrument for endoscopic surg

Details Self-hinging disposable retractor instrument for endoscopic surg Self-hinging disposable retractor instrument for endoscopic surg

1993-04-13

1994-08-23

Apley, Richard J.

Surgery

Truss

Perineal

606198, 604105, A61B 1702

Patent

active

053398033

ABSTRACT:
An endoscopic surgical retractor instrument is presented which has a laterally collapsible and expandable self-hinging truss support platform carried by a sleeve and extension member. The sleeve is slideably carried by the extension member and consists of first and second arcuate sections which are radially and oppositely carried by the extension member and captively contained thereon by the inner surface of a housing cavity. The housing has a distal barrier adjacent its distal end which defines a limit to the distal axial displacement of the sleeve relative to the housing. Upon engagement of the distal barrier by the sleeve, the continued distal axial displacement of the extension member will cause expander struts in the truss support platform to expand the platform's outer struts laterally thereby opening the truss. Upon retraction of the expansion member in the housing, the outer struts collapse laterally and continued axial proximate displacement of the extension member will cause the expander struts to collapse laterally and close the truss.

REFERENCES:
patent: 832201 (1906-10-01), Kistler
patent: 2320611 (1943-06-01), Kandle
patent: 3857395 (1974-12-01), Johnson et al.
patent: 4236742 (1980-12-01), Florence
patent: 4592341 (1986-06-01), Omagari et al.
patent: 5112310 (1992-05-01), Grobe
patent: 5178133 (1993-01-01), Pena
patent: 5195505 (1993-03-01), Josefsen

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