×

SPRINKLER SYSTEMS

  • US 3,854,664 A
  • Filed: 10/11/1973
  • Issued: 12/17/1974
  • Est. Priority Date: 03/30/1973
  • Status: Expired
First Claim
Patent Images

1. In a sprinkler system having fluid under pressure flowing therethrough, and a sprinkler head operatively connected to said system having a nozzle for dispersing said fluid therefrom, the improvement which comprises:

  • impeller means associated with said head operatively engaging said nozzle for rotating said nozzle in response to said fluid passing through said system, said impeller means including transmission means for transmitting movement of said impeller to said nozzle, said transmission means being sealed off from engagement by said fluid at one end by an expandable diaphragm separating said transmission means from said fluid and closedoff in a fluid-tight manner at the other end and a lubricating medium completely filling the sealed-off portion of said transmission means, said lubricating medium being free to selectively contract or expand thereby displacing said diaphragm in response to varying ambient conditions encountered by said sprinkler head.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×