Rolling hammer drill

Details Rolling hammer drill Rolling hammer drill

2007-03-20

2007-03-20

Sipos, John (Department: 3721)

Tool driving or impacting

Impacting devices

Hammer head driven by relatively moving motion transmitting...

C173S093000, C173S093500, C173S109000, C173S114000

Reexamination Certificate

active

10886604

ABSTRACT:
A hammer drill with rolling contact at the contact surfaces for transmission of axial force between a drive shaft and wave race. By using roller bearings, line contact is obtained. The area of contact is thus close to zero as opposed to a relatively large area in engagement systems using toothed surfaces. Use of point or line contact reduces heat generation and reduces energy loss due to friction.

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patent: 3363700 (1968-01-01), Bogusch, Jr.
patent: 5711380 (1998-01-01), Chen
patent: 6000512 (1999-12-01), Cronin et al.
patent: 6059049 (2000-05-01), Lin
patent: 6196332 (2001-03-01), Albert et al.
patent: 6230819 (2001-05-01), Chen
patent: 6684964 (2004-02-01), Ha

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