Elongated-member-driving apparatus – With interlock means
Reexamination Certificate
2000-08-14
2001-04-10
Smith, Scott A. (Department: 3721)
Elongated-member-driving apparatus
With interlock means
C227S130000
Reexamination Certificate
active
06213372
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a drive device for a nailing machine for allowing the nailing machine to be operated in a successive nailing mode or a one-shot nailing mode.
2. Description of the Related Art
A wide variety of nailing machines has heretofore been provided. An example of which is U.S. Pat. No. 5,597,106 issued to Hamano, et al. on Jan. 28, 1997 that discloses a drive device for a nailing machine. The drive device allows the nailing machine to be operated in a successive nailing mode or a one-shot nailing mode. Yet, the structure of the drive device is relatively complicated. The present invention is intended to provide a simpler design for the drive device.
SUMMARY OF THE INVENTION
A nailing machine in accordance with the present invention comprises:
a housing containing a nail hitting mechanism for hitting nails;
a contact arm for pressing against a work;
a trigger lever having an end pivotally connected to the housing;
a contact lever having a lower end pivotally connected to the trigger lever and an upper end actuatable by the contact arm when the contact arm is pressed against the work; and
a pressing member comprising a first end pivotally connected to the trigger lever and a second end, the pressing member further comprising an arcuate portion on a side thereof;
whereby when the contact arm is firstly pressed against the work and the trigger lever is pulled subsequently to activate the nail hitting mechanism via transmission by the contact lever, the arcuate portion of the pressing member bears against the housing such that the contact lever is immobile when the contact arm is disengaged from the work and when the trigger lever is kept pulled after hitting the nail to the work, the nailing machine being thus in a one-shot mode; and
whereby when the trigger lever is firstly pulled such that the second end of the trigger lever bears against the housing, and the contact arm is subsequently pressed against the work and thus actuates the contact lever to activate the nail hitting mechanism for hitting a nail, the contact lever is returned to its original position when the contact arm is disengaged from the work and when the trigger lever is kept pulled after hitting the nail, the nailing machine being thus in a successive nailing mode.
The housing comprises an indent and a corner adjacent to the indent. The arcuate portion of the pressing member is pressed against the corner of the housing and the second end of the pressing member enters the indent when the contact arm is pressed against the work and when in the one-shot nailing mode.
Other objects, advantages, and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
REFERENCES:
patent: 5551621 (1996-09-01), Valles
patent: 5692663 (1997-12-01), Yang
patent: 5791545 (1998-08-01), Lin
patent: 5797533 (1998-08-01), Lee
patent: 5836501 (1998-11-01), Lai
patent: 5862969 (1999-01-01), Lee
patent: 6059161 (2000-05-01), Chang et al.
patent: 6116488 (2000-09-01), Lee
Kamrath Alan
Rider Bennett Egan & Arundel LLP
Smith Scott A.
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