Metal deforming – Tool and/or tool holder – Including flexible or yieldable tool or support
Patent
1979-09-06
1982-10-05
Larson, Lowell A.
Metal deforming
Tool and/or tool holder
Including flexible or yieldable tool or support
72398, B21D 901
Patent
active
043522858
ABSTRACT:
A hydraulic wedge mandrel is disclosed for supporting top and bottom cylindrical segments of pipe during cold bending of the pipe. Bottom and top assemblies (14) and (16) are vertically movable to and away from each other for expanding and collapsing the mandrel. Bottom and top arcuate support segments (18) and (22) support the bottom and top assemblies (14) and (16) respectively. Bottom spring plate (20) is mounted to bottom arcuate support segments (18) opposite bottom assembly (14) and top spring plate (24) is mounted to top arcuate support segments (22) opposite top assembly (16). Secured to the top of bottom spring plate (20) and the bottom of top spring plate (24) are a plurality of wedges (28). Secured to center spring plate (26) located between bottom and top spring plates (20) and (24) are complementary wedges (30) which traverse and supportably engage wedges (28) when center spring plate (26) is moved longitudinally of bottom spring plate (20) and top spring plate (24) to move bottom and top assemblies (14) and (16) apart and in engagement with cylindrical segments of a pipe.
REFERENCES:
patent: 174608 (1876-03-01), Wright
patent: 336854 (1886-02-01), Higgins
patent: 856896 (1907-06-01), McCormick
patent: 2380344 (1945-07-01), Sutton
patent: 2401052 (1946-05-01), Cummings
patent: 2734120 (1956-02-01), Sensenig
patent: 2734749 (1956-02-01), Benjamin
patent: 2835498 (1958-05-01), Howes
patent: 3109477 (1963-11-01), Avera et al.
patent: 3115798 (1963-12-01), Donaway
patent: 3117797 (1964-01-01), Buck
patent: 3383723 (1968-05-01), Connelly
patent: 3747394 (1973-07-01), Cunningham
patent: 3834210 (1974-09-01), Clavin et al.
patent: 3851519 (1974-12-01), Clavin et al.
patent: 4086803 (1978-05-01), Wheeler
LaRue Forrest N.
Wheeler Lionel H.
Crutcher Resources Corporation
Larson Lowell A.
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