MACHINE-ACTUATED AND REMOVABLE SAFETY CLOSURE WITH ANTI-ROTATION AND MACHINE-RELEASED HOLDER

Mašinski aktiviran uklonjiv sigurnosni zatvarač (10) za cevasti element, ovaj zatvarač sadrži:više bregom aktiviranih listova (37) koji se nalaze iznad bregaste ploče (25) tela (20) čepa zatvarača, bregasta ploča (25) sadrži pogonske rupe (41) za prijem odgovarajućih pogonskih osovinica (61) obrtnog držača (60) čepa, pogonske osovinice (61) obrtnog držača (60) čepa sprežu pogonske rupe (41) bregaste ploče (25) i pomeraju više bregom aktiviranih listova (37) između uvučenog prvog položaja i produženog drugog položaja dok se obrtni držač (60) čepa obrće između početnog položaja i krajnjeg položaja; naznačen time što obrtni držač (60) čepa sadrži rezu (63, 75); gde telo (20) čepa sadrži centralnu glavčinu (49) sa sredstvima (53, 55) za prijem reze (63, 75); i pri čemu reza (63, 75) kada je prime prijemna sredstva (53, 55) dolazi u ravan najmanje jedne od pogonskih osovinica (61) obrtnog držača (60) čepa iznad odgovarajuće pogonske rupe (41) bregase ploče (25).Prijava sadrži još 7 patentnih zahteva. An improved machine-actuated removable safety closure made according to this invention includes a latch and central hub combination which permits a plug holder to self-align with the drive holes of the closure's cam plate so that an operator can retrieve the closure without having to lean directly over it. A bypass valve interferes with the cam plate when the bypass is in its closed position. This interference prevents the cam plate from actuating the locking leaves. Anti-rotation slots located on the plug body and the flange of the tubular member interlock and prevent rotation of the plug body beyond a certain rotational window during the setting process and when the plug body is in its final sealing position. The latch, along with means to secure the plug holder to the boring bar, allows the holder to be retrieved from the set plug.