Abstract

A link assembly (3) and system (203) including a first link portion (7, 207) and a second link portion (9, 209). The first link portion (7, 207) includes a bulbous end (13). The second link portion (9, 209 a socket (15). To link adjacent link assemblies (3) or the first link portion (7, 207) to the second link portion (9, 209), the bulbous end (13) is received in the socket (15). In one example, the link assembly (3) is part of an agricultural ground engaging chain (1) having harrow member portions (5). In other examples, the link assembly and system (203) are used to link first element (204) and second elements (206) to one another. This may be used to join or anchor vehicles, structures and the like.

IPC Classes  ?

• A01B 21/08 - Harrows with rotary non-driven tools with disc-like tools
• A01B 23/06 - DiscsScrapers for cleaning discsSharpening attachments

Abstract

A reamer (1) for underground passageways, comprising: a support housing (3) and a plurality of radially extending cutting wings (11); a plurality of ring segments (13), wherein each ring segment (13) includes an arcuate ring portion (15), wherein the plurality of ring segments (13) are assembled to form a stabilization ring (17) bridging radial outer edges (12) of the plurality of cutting wings (11), wherein the stabilization ring (17) is fastened to at least one of the cutting wings (11) to resist radial movement of the reamer (1).

IPC Classes  ?

• E21B 10/26 - Drill bits with leading portion, i.e. drill bits with a pilot cutterDrill bits for enlarging the borehole, e.g. reamers
• E21B 10/30 - Longitudinal axis roller reamers, e.g. reamer stabilisers
• E21B 7/28 - Enlarging drilled holes, e.g. by counterboring

Abstract

A link assembly (3) for an agricultural ground engaging chain (1) including a plurality of said link assemblies (3), the link assembly including: a first component (7) having a first clamping portion (21) and a first link portion (13) for linking with a link portion of an adjacent link assembly; a second component (9) having a second clamping portion (27) and a second link portion (15) for linking with a link portion of an adjacent link assembly; a resilient harrow member (5), wherein the resilient harrow member (5) is elastically deformable; and at least one fastening element (11). When the link assembly (3) is assembled, the resilient harrow member (5) is clamped between the first clamping portion (21) and the second clamping portion (27) under an applied pressure, elastically deforming to enable engagement of the at least one fastening element, whereby upon release of the applied pressure, the resultant elastic stress in the harrow member (5) urges the first (7) and second (9) components to bear against the fastening element (11) to retain the components of the link assembly (3) together.

IPC Classes  ?

• A01B 21/08 - Harrows with rotary non-driven tools with disc-like tools
• A01B 23/06 - DiscsScrapers for cleaning discsSharpening attachments
• A01B 19/08 - Harrows with non-rotating tools with link network supporting tooth-like tools

Abstract

This invention concerns a reamer for underground passageways made, for instance, for the installation of cables or pipelines to distribute services in a reticulated network. It comprises a support housing having plural integral pairs of spaced-apart laterally extending support wings, wherein between each pair of support wing there is a longitudinally extending slot to receive a laterally extending cutting wing such that each cutting wing is captured between a respective pair of support wings. A stabilization ring comprising a circular sleeve supported by plural radial support pillars which extend from a central collar. Wherein, the cutting wings engage with the support housing to resist rearward longitudinal movement, with the support wings to resist torsional forces, and with the circular sleeve of the stabilization ring to resist radial movement.

IPC Classes  ?

• E21B 10/26 - Drill bits with leading portion, i.e. drill bits with a pilot cutterDrill bits for enlarging the borehole, e.g. reamers
• B27G 13/00 - Cutter blocksOther rotary cutting tools specially adapted for working wood or similar materials
• B23D 77/00 - Reaming tools
• B27G 15/00 - Boring or turning toolsAugers