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US 2017/0254200 A1Published application
Bit Holder (Pick) with Shortened Shank and Angular Differential Between the Shank and Base Block Bore
AssigneeThe Sollami Company
InventorPhillip Sollami
Life of this patent
Estimating the term…
Abstract
Improvements in previous bit assembly components including shortened slotted shanks and shortened base block bore receiving portions disclose relationships between shank differential interference portions and the corresponding base block bores. Changes in the differences in interference angles lead to changes in slot width, length and steel hardnesses in order to provide necessary retaining forces between the shank and base block bore.
Claims17
A bit holder comprising
- a forward body portion;
- a generally cylindrical hollow shank depending axially from the body portion and having a slot through a side of the shank, the slot having a slot distal end and a slot forward terminus, the slot extending axially inwardly from a distal end of the shank;
- and
- a forwardmost portion of the shank having an outer diameter larger than an adjacent portion more toward the distal end, a bottom of the forwardmost portion being sized to form an annular interference contact.
1 more element
A combination bit holder and base block comprising:
- the base block including a bit holder receiving bore extending therethrough, the bore being cylindrical, non-lockingly tapered, or a combination of a cylindrical bottom portion with a tapered top portion;
- and
- the bit holder comprising:
- a forward body portion;
- a generally cylindrical hollow shank depending axially from the body portion and having a slot through a side of the shank, the slot having a slot distal end and a slot forward terminus, the slot extending axially inwardly from a distal end of the shank;
- and
- a forwardmost portion of the shank having an outer diameter larger than an adjacent portion of the shank more toward the distal end, a bottom of the forwardmost portion being sized to form an annular interference contact with a complimentary portion of the bit holder receiving bore of the base block.
4 more elements
Dependencies are inferred from the claim text.