Pipe joints or couplings – Essential catch – Pivoted
Patent
1987-08-18
1989-01-17
Arola, Dave W.
Pipe joints or couplings
Essential catch
Pivoted
285321, 464182, F16L 3900
Patent
active
047984066
ABSTRACT:
A locking member for insertion into a radial gap between radially inner and outer components 28,29 respectively which rotate together. The locking member is provided for preventing relative rotational movement between the components and exploits and centrifugal forces exerted on the ring due to the rotation of the components to ensure that frictional locking is maintained. The ring is shaped to form a plurality of "levers" 25 joined together the ring. Each lever 25 comprises two limbs 22,24 and has a fulcrum (b) which engages an inward facing circumferential surface of the outer component 29. The product of the mass of one of the limbs 22 of each lever 25 with its moment about the fulcrum is greater than the corresponding product for the other limb 24 so that the centrifugal forces on the limbs 22,24 cause each lever 25 to rock about its fulcrum (b) and thereby urge the limbs 24 into engagement with an outward facing circumferential surface of the inner component 28.
REFERENCES:
patent: 1889133 (1932-11-01), Pfefferle
patent: 2580781 (1952-01-01), Ytoffer
patent: 2667049 (1954-01-01), Guernsey et al.
patent: 3631688 (1972-01-01), Quick
patent: 3884087 (1975-05-01), Sukuki
Arola Dave W.
Rolls-Royce plc
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