SCREW CAP FOR CONTAINERS

• US 3,843,015 A
• Filed: 01/26/1973
• Issued: 10/22/1974
• Est. Priority Date: 01/28/1972
• Status: Expired due to Term

• Current Assignee: Theo Gerdes, Werner Blau
• Original Assignee: Theo Gerdes, Werner Blau
• Inventors: Blau, Werner, Gerdes, Theo
• Primary Examiner(s): Petrakes, John
• Application Number:
  US05/327,096
• Time in Patent Office: 634 Days
• Field of Search: 220/39R,4S 215/43R,49,50,55
• US Class Current: 220/288
• CPC Class Codes: F16J 13/12 attached by wedging action by means of screw-thread, interrupted screw-thread, bayonet closure, or the like

Abstract

A screw cap for containers, comprising a cap part and a threaded part, said cap part being mounted on and rotatable with respect to said threaded part, said cap part having a pressed-out hand grip arranged thereacross, means for coupling together said cap part and said threaded part comprising a bridge part, bearing limbs provided on said bridge part and spring means biasing said bridge part, said threaded part including grooves therein for guiding said bearing limbs, said spring means being located between said bridge part and said threaded part and urging said bridge part against said cap part and acting in such a manner that, on reaching a predetermined tightening torque of said threaded part in a thread, automatic decoupling of said parts occurs thereby preventing excessive tightening of said threaded part.

Claims

1. A screw cap for containers, comprising a cap part and a threaded part, said cap part being mounted on and rotatable with respect to said threaded part, said cap part having a pressed-out hand grip arranged thereacross, means for coupling together said cap part and said threaded part comprising a bridge part, bearing limbs provided on said bridge part and spring means biasing said bridge part, said threaded part including grooves therein for guiding said bearing limbs, said spring means being located between said bridge part and said threaded part and urging said bridge part against said cap part and acting in such a manner that, on reaching a predetermined tightening torque of said threaded part in a thread, automatic decoupling of said parts occurs thereby preventing excessive tightening of said threaded part.

2. A screw cap according to claim 1, wherein said threaded part is formed with a retroverted cup extending thereinto, said guide grooves being formed in said cup for the mounting of said bridge part.

3. A screw cap according to claim 1, wherein said threaded part has a recess therein for the location and lateral guidance of said compression spring.

4. A screw cap according to claim 1, wherein said bridge part has a mandrel-like part projecting downwardly therefrom, which engages within said spring means for the retention thereof.

5. A screw cap according to claim 1, wherein said bridge part has a hollow recessed in the Underside thereof, said spring means being extended upwards to within said hollow.