Pipe expander

Details Pipe expander Pipe expander

1986-09-25

1988-03-29

Larson, Lowell A.

Metal deforming

By relatively receding work-engaging tool-faces

Embodying three or more tools

B21D 4102

Patent

active

047335513

ABSTRACT:
A pipe expander head and pipe expander is disclosed which comprises a housing 30, in which a pin 50 is mounted. The pin 50 has a tapered end 54 and is provided with a plurality of teeth 60. The teeth 60 mesh with a gear assembly 62, 66 and 68 which in turn are coupled to a handle 72. Upon rotation of the handle 72 the gear assembly 62, 66 and 68 is rotated to drive the pin to expand an expander head. The expander head includes a plurality of segments 39, 41, 43, 45, 47 and 49 which are coupled together with a circular spring 96. The expander head segments each include annular stepped expanding portions 72, 74, 76 and 78 and the stepped portions are provided with recesses 80 for accommodating a work piece to be expanded.

REFERENCES:
patent: 157875 (1874-12-01), Sharpneck
patent: 417323 (1889-12-01), John
patent: 691446 (1902-01-01), Colby
patent: 1057664 (1913-04-01), Patterson
patent: 3812704 (1974-05-01), Kowal

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