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AssigneeDeere & Company
InventorsWilliam R. Chestnut, Clive L. Parcell, Christopher J. Cox, David J. MacKenzie
Estimating the term…
A power press is comprised of a frame, a stationary bed, a ram reciprocally movable toward and away from the bed and a safety guard for preventing movement of the ram toward the ram when the tooling for the press must be repaired or changed. The guard includes a first chain attached to the frame of the press and a second chain attached to the ram and attachable to the first chain to restrict movement of the ram toward the bed. The chains are connectable together at a plurality of locations to enable the combined, attached length of the chains to be adjusted. The adjustability permits the guard to be easily used with a press having a range of shut heights. A normally open power circuit controls the reciprocal movement of the ram. A key for closing the circuit by engagement with a receptacle in the circuit is attached to the first chain. The key is engageable with the receptacle when the chains are unattached and is not engageable with the receptacle when the chains are attached.
In a power operated machine comprising a frame, a stationary work bed on said frame, a movable member reciprocable relative to said frame toward and away from said bed and at least one guard for selectively preventing movement of the movable member toward said bed, the improvement wherein said guard comprises:
In a method for securing a power operated press, including a control circuit, against the accidental movement of a ram of the press toward a bed of the press comprising the steps of (a) moving the ram away from said bed;
Dependencies are inferred from the claim text.