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Screw cap with lock cylinder

  • US 3,985,007 A
  • Filed: 07/22/1974
  • Issued: 10/12/1976
  • Est. Priority Date: 07/24/1973
  • Status: Expired due to Term
First Claim
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1. A closure cap for closing a container opening, comprising cap means having an upper part and a screw-threaded lower part adapted for threaded engagement with said container opening, said lower part having an engaging portion and being rotatably coaxially connected with said upper part;

  • means in said cap means for connecting said lower part for turning with said upper part when the latter is turned in requisite direction for screwing said cap means into said container opening and for releasing said upper part for turning relative to said lower part when a predetermined turning moment during screwing said cap means into said opening is reached, said connecting and releasing means including a compression spring;

    locking means extending centrally through said spring for locking said cap means in said container opening, said locking means including a lock cylinder having an annular outwardly-projecting flange;

    a sealing ring surrounding said lock cylinder intermediate said flange and said engaging portion; and

    an abutment member surrounding said lock cylinder and being in abutting engagement with said flange and said spring, said abutment member being urged towards said engaging portion and compressing said sealing ring as a function of the inherent biasing force of said spring.

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