Patent ID: 6918492

Claim:
A sealed wheel case for use on a vibratory device for vibrating aggregate material, the vibratory device having a frame and a rotating shaft extending transversely across the frame and having a wheel, a driven portion of the shaft being operatively coupled to a drive system, the sealed wheel case comprising: a housing having a base, a peripheral sidewall, and a cover, the housing being sized to receive therein the wheel and further being adapted to house therein a quantity of lubricating oil for lubricating the wheel, the cover including an aperture adapted to receive therethrough the driven portion of the shaft; a seal operatively connected to the shaft adjacent the aperture of the cover; an annular baffle mounted to an inside surface of the cover and extending into the wheel case, the annular baffle positioned on the inside surface of the cover to generally surround the shaft and the seal; a plurality of attachment bolts for securing the housing to the frame, each attachment bolt including a shank having an inner end and an outer end, and a pressed on collar sized to be received on the shank from the inner end; at least a washer disposed between the inner end and the outer end; and at least an O-ring disposed between the inner end and the outer end, the O-ring being concentric with the washer; wherein the pressed on collar and the outer end of each attachment bolt press the washer and the O-ring to sealably secure the housing to the frame.