Abstract: An impact sprinkler has a nozzle connected to a housing and a discharge deflector member connected to a rotatable shaft assembly. The sprinkler has different replaceable nozzles and discharge deflectors for providing desired discharge characteristics. The shaft assembly and housing have contacting braking surfaces outside of the water flow providing a frictional braking force dependent on both water flow rate and pressure. The sprinkler has a deflection member for rotating an impact assembly relative to the shaft assembly while a pin supports the impact assembly at a position above the deflection member. A lower portion of the shaft assembly may be positioned in a recess in the housing such that a surface on the shaft assembly contacts a surface in the recess, and a highly wear-resistant material may be disposed on a surface of either the shaft assembly or the recess for providing improved wear characteristics.

Abstract: A rotary impact sprinkler is disclosed having a nozzle connected to a housing and a discharge deflector member connected to a rotatable shaft assembly without a dynamic seal between the nozzle and the deflector. The sprinkler may be provided with different nozzles and discharge deflectors that are easily removed and replaced for providing desired water flow and discharge characteristics. The shaft assembly and housing may have contacting braking surfaces outside of the water flow. The braking surfaces may provide a frictional braking force dependent on both water flow rate and water flow pressure. The sprinkler has a rotatable impact assembly supported by the shaft assembly and including a deflection member for rotating the impact assembly relative to the shaft assembly. The shaft assembly may have a pin for supporting the impact assembly at a position above the deflection member.

Abstract: A modular tank heater apparatus including a housing defining a cavity and a receptacle that is in communication with the cavity, a heater element coupled to the housing, and a set of cords selectively connectable to the heater element to provide either a permanent or releasable electrical connection. Each of the set of cords includes a plug with a generic portion and a specific portion. The generic portion of the plugs are selectively disposable in the receptacle to engage the housing and create a first seal between the plug and the housing. Additionally, the plugs define a seal surface engageable with the housing to create a second seal between the plug and the housing. The present invention also provides a method of manufacturing the modular tank heater. Finally, the present invention includes a tank heater having a mounting assembly for selectively connecting the housing to a body in a variety of positions.