Dentistry – Apparatus – Having storage or nonuse supporting means
Reexamination Certificate
2006-07-18
2006-07-18
Lewis, Ralph A. (Department: 3732)
Dentistry
Apparatus
Having storage or nonuse supporting means
C137S355170
Reexamination Certificate
active
07077650
ABSTRACT:
The present invention provides a utility line extension and retraction system for enabling users thereof to selectively extend a utility line for utility line use and retract the utility line for utility line storage. The utility line extension and retraction system essentially comprises a plurality of utility line cassettes. Each utility line cassette essentially comprises two laterally-spaced, pulley-receiving walls, an anterior line outlet end, a posterior line inlet end, a stationary pulley assembly adjacent the anterior line outlet end; a traveling pulley assembly intermediate the anterior line outlet end and the posterior line inlet end, and a utility line extending from the posterior line inlet end to the anterior line outlet end, which line imparts motion to the traveling pulley assembly. The traveling pulley assembly travels along a closed path comprising an ascension path, a descension path, and an extended-state rest stop intermediate the ascension and descension paths.
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Donahoe Casey
Lewis Ralph A.
Meroni & Meroni P.C.
Meroni, Jr. Charles F.
Scott Christopher J.
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