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US 4,922,858 AGranted
Animal waterer
AssigneeAhrens Agricultural Industries Co.
InventorClaude W. Ahrens
Life of this patent
Estimating the term…
Abstract
An energy free animal waterer includes a base unit having an upstanding tube in which a ballast connected to a cable moves for normally pivoting a closure valve upwardly into engagement with an access opening in a top unit mounted on the base unit. The mechanism for opening and closing the closure valve is totally independent of the water in the reservoir and the top unit such that freezing of the water will not render the closure valve inoperative and the unit may be easily assembled and disassembled.
Claims6
An animal watering tank comprising:
- a base unit including a water reservoir having a water level;
- a top unit positioned on said base unit over said water reservoir and having an access opening into said reservoir;
- a closure valve pivoted to said base unit under said top unit for opening and closing said access opening in said top unit;
- an upstanding tube in said base unit having an interior isolated from water in said reservoir;
- and
- a ballast element in said tube connected to said valve to exert an upward pull thereon to normally maintain said valve in said closed position but operable to pivot downwardly to said open position in response to downward pressure on said closure valve from an animal seeking water.
3 more elements
Dependencies are inferred from the claim text.