Locking handle for pneumatic discharge tube

Claim 1

A hopper means for storage of lading and having discharge portions for removal of said lading from the hopper means, said discharge portions having pneumatic devices attached thereto and having a portion communicating with the lading and having opposed open end portions and closure cap members adaptable to close off said end portions, and bail means adjacent the associated cap member, the improvement comprising: a pivoted locking handle assembly including a pivotable locking handle having a closure cap engaging portion positioned between the bail and the cap and said locking handle being rotatable to supply a biasing closing force between the bail and the cap member for sealing an associated end of the discharge tube; said bail having lug means for mounting the handle on the bail; said locking handle assembly including an adjustable pivot means; said adjustable pivot means including a pivot pin having an eccentric cam portion and connecting the handle with the bail and providing for pivotal movement of the handle, said pivot pin rotatable to adjust the biasing closing force between the cap contacting portion and the bail contacting portion and having an adjustment head portion with a plurality of sides providing for graduating the adjustment of said biasing closing force between the cap contacting portion and the bail contacting portion; said lug means including a pair of handle mounting lug members spaced about said locking handle and including both an upper lug and a lower lug; one of said lug members having an irregular opening therein adapted to receive the head portion of said pivot pin and thereby provide for rotatable indexing of the pivot pin.