Survey monument and improved extraction restriction means theref

Details Survey monument and improved extraction restriction means theref Survey monument and improved extraction restriction means theref

1993-01-29

1994-03-08

Friedman, Carl D.

Static structures (e.g., buildings)

Land marker or monument

52156, 52162, 411456, 411922, E01F 902

Patent

active

052917037

ABSTRACT:
A survey monument has a simple spring clip extraction restricting means formed as a wire form spring member to provide a straight leg inserted in a diametral opening in the rod and a curved co-planar leg which effects a snap fit with the outer periphery of the rod. An axially extending leg is offset radially outwardly and yields to displacement while imparting rotational torque to the rod when the rod is driven into the ground, but opens and restricts extraction when the rod is moved in an opposite direction.

REFERENCES:
patent: 2858917 (1958-11-01), Wendt
patent: 3507081 (1970-04-01), Gallup
patent: 3916821 (1975-11-01), Pies
patent: 4120125 (1978-10-01), Cretan
patent: 4127972 (1978-12-01), Reimoser
patent: 4738060 (1988-04-01), Marthaler et al.
patent: 4810150 (1989-03-01), Matsakane et al.
patent: 5127785 (1992-07-01), Faucher

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