Tool driving or impacting – Impacting devices – Impact transmitting anvil
Reexamination Certificate
2011-07-19
2011-07-19
Nash, Brian D (Department: 3721)
Tool driving or impacting
Impacting devices
Impact transmitting anvil
C173S090000, C173S091000, C173S129000, C173S132000
Reexamination Certificate
active
07980322
ABSTRACT:
An impact adaptor to convert a rock drill to an impact driver is described. The impact adapter has a boom coupling for securing the adapter in co-operating alignment with the shank of a drifter. The adapter has a casing for slidingly receiving and guiding an anvil therein from a top open end of the casing. The casing has an open bottom end adapted for receiving a top end section of a pile, tube or rod in the casing. Anvil supports are provided in the casing for retaining the anvil captive therein in the absence of the top end section of the pile, tube or rod. The casing has a predetermined length above the anvil supports to permit captive displacement of the anvil and displacement of the top section of the pile, tube or rod therein. The impact adapter is secured to the drifter in a movable or immovable manner and compensates for wear of the shank.
REFERENCES:
patent: 3977480 (1976-08-01), Hilding
patent: 4232752 (1980-11-01), Hauk et al.
patent: 4296821 (1981-10-01), Larson
patent: 4593768 (1986-06-01), Eklof
patent: 5060734 (1991-10-01), Anderson et al.
patent: 5310014 (1994-05-01), Mueller
patent: 5549170 (1996-08-01), Barrow
patent: 6089330 (2000-07-01), Miescher et al.
Nash Brian D
Norton Rose OR LLP
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