Motors: expansible chamber type – With signal – indicator or inspection means
Reexamination Certificate
2005-06-07
2005-06-07
Look, Edward K. (Department: 3745)
Motors: expansible chamber type
With signal, indicator or inspection means
C092S00500L, C092S089000
Reexamination Certificate
active
06901840
ABSTRACT:
A fluid-powered mechanical actuator having a proximal end and a distal end and having a plurality of hollow tubular elements hingedly connected in end-to-end linked relationship to form a variable angle therebetween, each such link having one degree of freedom; provision to bias the elements in a direction to minimize the angle between them; a flexible elongated chamber enclosing a space within it, the chamber situated within the linked elements and within the link therebetween, substantially contained thereby, the chamber having a flexible but non-expansible wall; and apparatus to provide to the space within said chamber a pressurized working fluid; whereby the pressure of the working fluid causes said chamber to straighten within said elements, especially at said links, thereby moving the relative position of the elements in a manner to act against the biasing means, thereby to cause an increase of the angle between them by providing an increase in working fluid pressure.
REFERENCES:
patent: 3420331 (1969-01-01), Minnite
patent: 4689538 (1987-08-01), Sakaguchi et al.
patent: 4791549 (1988-12-01), Heiser et al.
patent: 4928926 (1990-05-01), Bloemendal et al.
patent: 5826483 (1998-10-01), Koseki
Yatsko Dawn E.
Yatsko Joseph S.
Bergquist Donald A.
Kershteyn Igor
Look Edward K.
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