4. Earth working
  5. Overload shifting
  6. Against spring return device

Harold A. Ralston

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Multi-section harrow assembly

Earth working – Plural wheeled implements – Outrigged implement adjustable inwardly
Patent

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Spring automatic reset plow assembly

Earth working – Overload shifting – Against spring return device
Patent

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Spring automatic reset plow assembly with reset damper system

Earth working – Overload shifting – Against spring return device
Patent

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Trip mechanism for ground working implement

Earth working – Overload shifting
Patent

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Profile ID: LFUS-PAI-P-960585

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