Implements or apparatus for applying pushing or pulling force – Device or member for contacting and guiding moving cable – Including rotatable – cable contacting – pulley wheel element
Reexamination Certificate
2007-06-26
2007-06-26
Marcelo, Emmanuel M (Department: 3654)
Implements or apparatus for applying pushing or pulling force
Device or member for contacting and guiding moving cable
Including rotatable, cable contacting, pulley wheel element
C024S1340KA, C024S1340KB
Reexamination Certificate
active
10952067
ABSTRACT:
A failsafe device for raising/lowering articles includes a frame and a fastener for attaching the frame to a ceiling or wall to elevated an article above the floor. A pulley or sheave is mounted on the frame about a substantially horizontal axis when the frame is mounted on the ceiling or wall. A line is entrained over the pulley and has a substantially vertical lifting line portion attachable to the article to the lifted and a substantially vertical pulling line portion arranged to be pulled downwardly by a user to elevate the article and raised upwardly to lower the article. A cam is mounted on the frame on one side of the pulling line portion and has a line engaging surface. The cam is movable between a line releasing position and a line locking position, the line engaging surface including a first engaging portion normally spaced a fixed distance from the pulling line portion to form a clearance gap in the line releasing position and a second engaging portion bridging the clearance gap a distance equal to least the fixed distance for substantially instantaneously arresting the line and preventing movement of the pulling line portion upwardly toward the pulley and corresponding downward movement of the article.
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Stone Peter
Vasyukevich Anton P.
LandOfFree
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