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Title: Irrigation pivot stand construction
Claims: Having thus described my invention, I claim: 1. A pivot stand for circular irrigation systems comprising: a frame adapted to be disposed on a supporting surface; a stationary water supply pipe having a pipe end portion directed vertically upwardly with respect to said surface and mounted on said frame in spaced relationship to said supporting surface; a rotatable water delivery pipe extending radially outwardly from said end portion and having a downwardly directed segment rotatably coupled with said end portion; a rotatable conduit containing a plurality of electrical control conductors, said conduit being coupled with said delivery pipe for rotation therewith and having a vertical portion passing in through said end portion and out through said segment; a slip ring assembly enclosing a plurality of slip rings mounted beneath said end portion; a plurality of wiping contacts disposed for electrical contact with said slip rings within said housing, one of said contacts and said slip rings coupled with said electrical control conductors and the other of said contacts and said slip rings coupled with an external power supply whereby to supply electrical current to the electrical control conductors. 2. The invention of claim 1, wherein said pipe end portion extends upwardly in generally perpendicular relationship to said surface and said conduit extends through said portion in parallel relationship thereto. 3. The invention as in claim 2 including sealing means for preventing the leakage of water from said end portion where it is pierced by said conduit, said sealing means adapted to permit rotation of said conduit. 4. The invention as in claim 2 including a second sealing means for preventing the leakage of water from said segment where it is pierced by said conduit. 5. The invention of claim 2, wherein said conduit is disposed in coaxial relationship to said pipe end portion, and said housing is disposed in vertical alignment with said pipe end portion. 6. The invention of claim 1, wherein is included a plurality of electrical supply conductors for bringing electrical energy from a power source to one of said slip rings and said wiping contacts. Other info: Inventors: Reinke, Richard F. Application Number: 504808 Filing Date: 1974-09-10 Publication_date: 1976-02-03 Assignee: Primary Class(es): 239/728 439/24 Other Classes: US Patent Ref:
Other Refs: Primary Examiner: Lake, Roy Assistant Examiner: Jones, DeWalden W. Attorney: Lowe, Kokjer, Kircher, Wharton & Bowman |
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