Elongated-member-driving apparatus – With means to move or guide member into driving position – Including supply magazine for constantly urged members
Reexamination Certificate
2000-06-23
2001-02-20
Smith, Scott A. (Department: 3721)
Elongated-member-driving apparatus
With means to move or guide member into driving position
Including supply magazine for constantly urged members
C227S125000, C227S127000
Reexamination Certificate
active
06189759
ABSTRACT:
BACKGROUND OF THE INVENTION
Portable type fastener driving devices of the type herein contemplated are the type that include a portable frame structure having nosepiece structure defining a fastener drive track, a fastener driving element slidably mounted in the drive track, a magazine assembly for feeding a supply of fasteners along a feed track so as to move a leading fastener into the drive track and a manually actuated fastener driving system for moving the fastener driving element through successive cycles each of which includes a drive stroke and a return stroke.
The invention is particularly directed to devices of the type described which include a spring biased latch assembly, such as disclosed in U.S. Pat. No. 5,297,713, operable to allow the magazine assembly containing a rearward portion of the fastener guiding section of the drive track to yieldingly move rearwardly or to be moved rearwardly into a fastener jam clearing position. While the spring biased latch assembly has worked effectively in operation, there is always a need to provide a more cost effective latch assembly and has the following four operational features: (1) provides easy access to the drive track enabling the user to clear a jammed fastener quickly; (2) enables the user to unlatch the magazine assembly using one hand while holding the device with the other hand; (3) allows the user to clear a jam without tools; and (4) prevents self unlatching of the magazine assembly.
BRIEF DESCRIPTION OF THE INVENTION
It is an object of the present invention to provide a fastener driving device including a spring biased latch assembly for the magazine assembly which fulfills the needs expressed above. In accordance with the principles of the present invention, this objective is achieved by providing a fastener driving device comprising a frame structure presenting a handle portion constructed and arranged to be gripped by a user enabling the user to handle the device in a portable fashion. Fixed nosepiece structure includes forward and rearward nosepiece portions with respect to the frame structure defining a fastener drive track. A fastener driving element is slidably mounted in the drive track. A manually actuated fastener driving system carried by the frame structure is constructed and arranged to move the fastener driving element through successive operating cycles each including a drive stroke and a return stroke. A magazine assembly carried by the frame structure has fixed structure defining a fastener feed track leading to the drive track and movable structure constructed and arranged to enable a package of fasteners to be loaded in the magazine assembly and fed along the feed track so that the leading fastener of the fastener package is moved into the drive track so as to be driven outwardly thereof into a workpiece during the drive stroke of the fastener driving element. The fixed structure of the magazine assembly includes a rearward nosepiece portion fixed with respect to the frame structure, the nosepiece portions together defining a fastener guiding portion of the drive track. Cooperating guide structure operatively between the magazine assembly and the frame structure enables the magazine to be moved (1) into a normal operating position in a direction to move the rearward nosepiece portion toward the forward nosepiece portion and into cooperating relation together and (2) from the normal operating position in an opposite direction into an intermediate position wherein the nosepiece portions are spaced apart and therebeyond into separated relation with respect to the frame structure. A spring biased releasably latch assembly is constructed and arranged with respect to the magazine assembly and the frame structure manually movable between (1) a normally operating position resiliently biasing the magazine assembly into the normal operating position thereof enabling the rearward nosepiece portion of the magazine assembly disposed together in cooperating relation with the forward nosepiece portion to be yieldingly moved therefrom, (2) an intermediate position wherein the magazine assembly is resiliently retained against movement beyond the intermediate position thereof to enable jammed fasteners to be removed from between the spaced apart rearward and forward nosepiece sections and (3) a separating position enabling the magazine assembly to be freely moved beyond the intermediate position into separated relation with respect to the frame structure.
Other objects of the present invention are to provide a device of the type describe above which is combined with other features hereafter described in detail.
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Canlas Prudencio S.
Fang Zheng
Maguire Paul S.
Pillsbury Madison & Sutro LLP
Smith Scott A.
Stanley Fastening Systems, LP
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