Agricultural tool shank and spring release
AssigneeAgrowplow Pty. Limited
InventorJohn W. Ryan
Life of this patent
Estimating the term…
Abstract
A plough shank having a rounded leading edge portion with a leading surface, a trailing portion, a web connecting the trailing and leading portions, an attachment mechanism at the top of the shank to enable attachment of the shank to a plough frame so that the leading surface is inclined by 60.degree. to 80.degree. to the horizontal, and a construction at the bottom of the shank to enable the attaching of a digging point thereto. The attachment mechanism may comprise a lobe integral with the shank and received in a clamp for attachment to a tool bar. The clamp may include two pivotably connected portions with an interconnected spring or hydraulic system.
Claims18
A rigid plough shank for use in soil, including:
- a generally vertical upper part attachable to a plough frame for being drawn thereby, and a lower part adapted to receive and support a digging point;
- said upper part having a leading portion with a leading surface having a rounded horizontal profile;
- a trailing portion;
- a web connecting the trailing and leading portions;
- said leading and trailing portions having a transverse width greater than that of said web, whereby the shank has a horizontal cross-section for inhibiting flexure of the shank as it moves through the soil, so that the digging point attached thereto is held at a substantially fixed location relative to the plough frame and in a substantially fixed attitude;
- attachment means disposed at the top of the shank, permitting attachment of the shank to a plough frame, whereby, said leading surface is inclined rearwardly and upwardly by 60.degree. to 80.degree. to the horizontal, said inclination in combination with said profile, inhibiting collection of trash on the shank in use;
- said lower part having a generally horizontal forwardly extending portion and means for receiving and supporting a digging point, and further defined by said leading surface terminating in a forwardly facing arcuate section joining said upper and lower parts inhibiting wear of the shank in that region of the shank and to enhance soil flow past the shank in that region.
A combination comprising a rigid plough shank for use in soil, including:
- a generally vertical upper part attachable to a plough frame for being drawn thereby, and a lower part, said lower part receiving and supporting a digging point;
- said upper part having a leading portion with a leading surface having a rounded horizontal profile;
- a trailing portion;
- a web connecting the trailing and leading portions;
- said leading and trailing portions having a transverse width greater than that of said web, whereby the shank has a horizontal cross-section for inhibiting flexure of the shank as it moves through the soil and the digging point attached thereto, is held at a substantially fixed location relative to the plough frame and in a substantially fixed attitude;
- attachment means disposed at the top of the shank for attachment of the shank to a plough frame, and said leading surface is inclined by 60.degree. to 80.degree. to the horizontal, said inclination in combination with said profile inhibit collection of trash on the shank in use;
- said lower part having a generally horizontal extending portion with means for receiving and supporting the digging point, and having said leading surface terminating in a forwardly facing arcuate section joining said upper and lower parts for inhibiting wear of the shank in that region of the shank and to enhance soil flow past the shank in that region;
- and a clamp for securely engaging said attachment means, said clamp being further adapted to secure the shank to a tool bar.
Dependencies are inferred from the claim text.