Device having power means for re-arching or de-arching a leaf sp

Details Device having power means for re-arching or de-arching a leaf sp Device having power means for re-arching or de-arching a leaf sp

1982-12-03

1985-03-26

Crane, Daniel C.

Metal deforming

By relatively movable offset tool-faces

With tool motion in fixed path

72386, 29230, B21D 3100

Patent

active

045065357

ABSTRACT:
A frame having a U-shaped member which is placed over and around a leaf spring to be re-arched while still on a vehicle; a platform pivotally mounted on the U-shaped member, a hydraulic jack supported on the platform so that the ram or piston rod on the jack may be hydraulically forced against a bending member which comprises a pair of spaced spring contact members located on opposite sides of the U-shaped member and on the opposite side of the spring therefrom. The device may be assembled over a spring and hydraulic pressure applied to drive the contact members to create a bending moment about a round surface on the inside face of the top of the U-shaped member. The pressure may be reversed to de-arch the spring.

REFERENCES:
patent: 1828758 (1931-10-01), Zimmerman
patent: 2194981 (1940-03-01), Marsh
patent: 2591210 (1952-04-01), Sowell
patent: 2910108 (1959-10-01), Fike
patent: 3195339 (1965-07-01), Lang
patent: 3344635 (1967-10-01), Van Allen
patent: 4254651 (1981-03-01), Kelly
patent: 4265106 (1981-05-01), McMaster et al.

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