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US 3,942,478 AGranted
Automatic pet feeding apparatus
OwnerDerek Laneinventor
Life of this patent
Estimating the term…
Abstract
An automatic pet feeder has several troughs, each with a lid hinged thereto. A T-shaped cam follower extends from each lid and rides against a cylindrical cam tube which makes a single revolution during the feeding period. I-shaped slots each extend partially around the tubular cam through a selected arc so that it underlies its associated cam follower at a desired time, wherein biasing means force the lid upward to swing the cam follower completely through the slot and hold the lid in open position.
Claims8
A pet feeding device comprising:
- first and second troughs;
- first and second lids pivotally mounted on said troughs;
- means biasing said lids toward open position;
- first and second cam followers carried on said first and second lids, respectively;
- a cylindrical cam surface on a tube rotatable adjacent said first and second troughs engaged by said cam followers to hold said lids in closed position;
- means forming first and second arcuate slots in said cam surface in radial alignment with said first and second cam followers so that, when moved beneath said cam followers said slots enable said cam followers to pivot out of engagement with said cam surface as said biasing means open said lids;
- and
- a rotary drive member connected to said tube for moving said cam surface past said followers.
5 more elements
Dependencies are inferred from the claim text.