Cutlery – Cutting tools – Saw
Reexamination Certificate
2007-01-30
2007-01-30
Payer, Hwei-Siu (Department: 3724)
Cutlery
Cutting tools
Saw
C030S392000, C074S060000, C173S114000
Reexamination Certificate
active
10856015
ABSTRACT:
An anti-rotation reciprocating drive apparatus for a reciprocating saw utilizes a wobble plate assembly that includes a drive shaft and an elongated arm with an interface structure for engaging a spindle. The interface structure has two ball-type interfaces that are concentrically aligned with one another, with the outer one being smaller than the inner one and both engaging a receiver portion of the spindle. The larger ball-type interface causes reciprocating movement of the spindle and the smaller outer interface prevents rotation of the spindle. The contact between the interfaces and the spindle receiver is a single point contact which reduces operating friction, wear of the parts and heat being generated.
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Greer Burns & Crain Ltd.
Payer Hwei-Siu
Robert & Bosch GmbH
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