Abstract A screw-on closure cap for closing the filling opening of a container or a tubular spout, the cap comprising relatively rotatable upper and threaded lower cap parts assembled together coaxially and having a resilient drive connection between them capable of transmitting a predetermined maximum torque between the upper and lower cap parts in the closing direction. The resilient drive connection comprises a bowed leaf spring whose arch is engaged in the interior of a pressed-up hand grip portion of the upper cap part, and whose two out-turned ends are resiliently engaged ratchetwise in depressions formed in the upper peripheral portion of the lower cap member. When limiting torque is reached the ends of the spring ride resiliently out of the recesses to allow the upper cap part to turn relatively to the lower cap part without further tightening the closure cap on the neck of the container or spout.
A screw-on closure cap comprising an upper cap part and a separate lower threaded cap part between which rotary movement is transmitted by means of resiliently engaging projections providing a limited-torque-transmitting connection between the said upper cap part and lower threaded cap part, the said lower cap part being unitarily mounted with the upper cap part so as to be Rotatable therein, said projections automatically disengaging when a predetermined cap torque or thread-tightness is achieved, said projections comprising the two ends of a bowed member whose intermediate portion is engaged in the upper rotary cap part, said two ends being bent away outwardly and being engaged resiliently in recesses at the periphery of the lower threaded cap part to provide a mutually resiliently flexible ratchet connection capable of transmitting tightening torque up to a limited value, said projections riding out of said recesses under the influence of tightening torque in excess of said limiting value.
Claim 2
Dependent Claim
155 words
A screw-on closure cap comprising an upper cap part and a separate lower threaded cap part between which rotary movement is transmitted by means of resiliently engaging projections providing a limited-torque-transmitting connection between the said upper cap part and lower threaded cap part, the said lower cap part being unitarily mounted with the upper cap part so as to be Rotatable therein, said projections automatically disengaging when a predetermined cap torque or thread-tightness is achieved, said projections comprising the two ends of a bowed member whose intermediate portion is engaged in the upper rotary cap part, said two ends being bent away outwardly and being engaged resiliently in recesses at the periphery of the lower threaded cap part to provide a mutually resiliently flexible ratchet connection capable of transmitting tightening torque up to a limited value, said projections riding out of said recesses under the influence of tightening torque in excess of said limiting value.
Claim 3
Dependent Claim
70 words
A screw-on closure cap according to claim 1, in which said bowed member fits in a hand grip part which is pressed out of the rotary upper cap part and extends transversely thereover, said two ends of the bowed member which are bent down on both sides engaging with the lower threaded cap part via spring lugs which are bent out laterally so as to project from the bowed member.
Claim 4
Dependent Claim
42 words
A screw-on closure cap according to claim 2, in which the laterally projecting spring lugs of the bowed member have tongue parts which are situated in alignment in the direction of closing the closure and which are bent upwards on one side.