Locking swivel apparatus with a supplemental internal...

Boring or penetrating the earth – With tool shaft detail – Axially telescoping shaft section

Reexamination Certificate

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Details

C166S242700, C464S019000, C464S163000

Reexamination Certificate

active

06915865

ABSTRACT:
A locking swivel apparatus is provided. The locking swivel includes an upper body portion having a counter bore about a cylindrical axis, a mandrel receivable in the counter bore, and a lower cap member threadably engaged with the upper body portion. The apparatus further includes an internal locking arrangement configured to selectively couple and decouple the upper body portion and the mandrel. The selective coupling and decoupling is disposed to correspondingly constrain and allow relative rotation of the upper body portion and the mandrel about the cylindrical axis. The apparatus still further includes a supplemental internal locking mechanism configured, upon engagement, to selectively constrain the upper body portion and the mandrel from reciprocating along the cylindrical axis. The engagement of the supplemental locking mechanism is operable to secure the upper body portion and the mandrel in a coupled position.

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Boyd's Bit Service, Inc., d/b/a Boyd's Rental Tools, advertising material prepared for Baker/Atlas Canada, Jul. 1999.
Boyd's Bit Service, Inc., d/b/a Boyd's Rental Tools general purpose advertising material, Jul. 1999.
Boyd's Bit Service, Inc., d/b/a Boyd's Rental Tools general purpose advertising material (details), Jul. 1999.
Bowen Power Swivels (date unknown, source unknown).
“Boyd's Mechanical Locking Swivel” brochure, Boyd's Rental Tools.

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