Measuring and testing – Specimen stress or strain – or testing by stress or strain... – Threaded fastener stress
Reexamination Certificate
2007-04-17
2007-04-17
Lefkowitz, Edward (Department: 2855)
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
Threaded fastener stress
C053S484000, C053S485000, C053S488000, C053S489000, C053S490000, C053S491000, C073S760000
Reexamination Certificate
active
11130006
ABSTRACT:
A metal cap12is fitted over a vessel (vial2), into which a rubber plug4is driven, and using a pressure block10, a load is applied to the cap12through the top surface12bthereof to maintain the rubber plug4compressed. Under this condition, a tightening roller14folds a skirt (lower end12cof a cylindrical portion12a) of the cap12inwardly to perform a tightening operation. Subsequently, the load applied to the top surface12bof the cap is once released, and then a load is applied again starting from a value FB which is less than the load FA applied during the tightening operation, gradually increasing to a higher value. In the course of increasing the load, a load FC at the instant when a displacement in the elevation of the top surface of the cap is detected, and this load FC is determined to be a seal load upon completion of the tightening operation. By detecting the load FC upon completion of the tightening operation, a seal capacity of the rubber plug14can be confirmed.
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Kanaiwa Toshiharu
Kitamoto Hiroaki
Tsuruyama Katsuji
Flynn ,Thiel, Boutell & Tanis, P.C.
Kirkland, III Freddie
Lefkowitz Edward
Shibuya Kogyo Co. Ltd.
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