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US 5,329,829 AGranted
Indicating positive positioning selector knob lock
AssigneeIngersoll-Rand Company
InventorLeslie J. Sell
Life of this patent
Estimating the term…
Abstract
An interfering surface is disposed between a rotating selector knob and a stop to prevent unwanted rotation of the selector knob and wherein release of the stop requires displacement of the knob in an axial direction relative to the stop to bypass the interfering surfaces thereby permitting selective rotation of the knob.
Claims6
A selector lock for a lever hoist function selector knob comprising:
- a selector knob assembly comprised of a stop mounted on a shaft and a hand operated open ended cylinder knob co-axially mounted about said stop for rotation and axial displacement thereabout;
- said stop and said hand operated knob having interfering surfaces in one position retaining mode and corresponding non-interfering surfaces in a second position selector mode;
- means for effecting axial displacement of said hand operated knob relative to said stop and for selecting interference of said surfaces and thereby rotation between said stop and said hand operated knob in one axial relative position between said stop and said hand operated knob and preventing relative rotation between said stop and said hand operated knob in a second axial relative position between said stop and said hand operated knob;
- and
- indicating means on said knob and said stop viewable through an open end of said knob for determining the rotary position of said knob.
2 more elements
Dependencies are inferred from the claim text.