Appeal No. 2004-0912
Application No. 09/942,061
BACKGROUND
Appellant’s invention is directed to a reversible ratchet type wrench. The scope
of Appellant’s invention can be ascertained from claim 21 which is reproduced below:
21. A reversible ratchet-type wrench comprising:
a handle;
a head extended from the handle;
a drive member rotatably mounted in the head, with the drive member
including a plurality of teeth formed on an outer periphery thereof;
a pawl including a first side with a plurality of ratchet teeth for releasably
engaging with the teeth of the drive member, with the pawl further
including a second side with a recess;
a rotatable switch member including a turn-piece for manual operation
and an actuating plate extended from the turn-piece, the switch member
being switchable between two positions for changing ratcheting
direction of the drive member, with the actuating plate of the switch
member including a first receptacle that faces the recess of the pawl and
that has a first end wall;
an elastic element; and
a peg, with the peg having a first end movably received in the recess of
the pawl and a second end, with the second end of the peg being received
in the first receptacle and including a second receptacle with a second
end wall, with the elastic element located in the first and second
receptacles between the first end wall and the second end wall, with the
peg and the elastic member being rotatable with the actuating plate and
biasing the ratchet teeth of the pawl to engage with the teeth of the drive
member.
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