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Tamperproof water meter

  • US 4,663,970 A
  • Filed: 09/03/1985
  • Issued: 05/12/1987
  • Est. Priority Date: 09/03/1985
  • Status: Expired due to Term
First Claim
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1. A fluid meter comprised of a main case, first mounting means on said main case, a retainer ring on said main case having means cooperating with said first mounting means to secure said retainer ring on said main case upon rotation of said retainer ring relative to the main case, said retainer ring including an opening extending therethrough, second mounting means on said retainer ring, a meter bonnet circumscribing said retainer ring and having means cooperating with said second mounting means to secure said bonnet to said retainer ring upon rotation of said bonnet relative to said retainer ring, said bonnet including an opening extending therethrough which is aligned with the opening extending through said retaining ring when said means cooperating with said second mounting means is engaged therewith, a register mechanism clamped between a portion of said retainer ring and a portion of said bonnet, a locking pin projecting through aligned openings through said bonnet and said retainer ring and into engagement with said main case to prevent rotation of said retainer ring relative to said main case and rotation of said bonnet relative to said retainer ring, said pin having (a) segmented flange means adjacent the exterior of said bonnet which permits movement of said pin into the interior of said meter when said flange is broken by pushing inwardly against said pin, and (b) a radially projecting portion in engagement with an interior surface of said meter whereby removal of said pin toward the exterior of said meter is prevented when said pin in in said locking position.

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