Metal deforming – With cutting – By composite tool
Reexamination Certificate
2001-03-02
2002-04-30
Crane, Daniel C. (Department: 3725)
Metal deforming
With cutting
By composite tool
C072S370110, C083S054000, C029S897300
Reexamination Certificate
active
06378349
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates generally to a tool and its use in forming a tube end and more particularly to method with such a tool and its use for preparing the ends of square tubes used for metal framing in the construction industry.
2. Description of Related Art
The following art defines the present state of this field:
Houghton, Jr., et al., U.S. Pat. No. 2,658,241 describes a bridging unit comprising a pair of telescopically adjustable bars of substantially U-shaped cross-section. The female bar includes a longitudinal guide rib in its bight portion and further including longitudinally spaced, outwardly pressed substantially louver-shaped projections defining depressions in its opposed side walls spaced from the free longitudinal edges thereof. The female bar still further having channels in the side walls extending from the depressions to said longitudinal edges, substantially louver-shaped dogs struck out from the side walls of the male section and engageable selectively in and disengageable from the depressions through the channels for releaseably securing the bars in adjusted position. The male section having a longitudinal groove in its bight portions slidably accommodating the rib, and guides struck inwardly from the side walls of the female bar adjacent one end thereof and engaged with the longitudinal edges of the male bar for slidably securing same in the one end of the female bar.
Smith, U.S. Pat. No. 2,711,806 describes an expandable supporting beam for use in building, comprising a plurality of telescopic member including a central member and two end members, each end member having an opening adjacent the outermost end thereof, a bearing portion on each of the end members for respective mounting on spaced supports, means for removing the bearing portions from the supports and including dismounting bars, each bar being provided with a recess facing a corresponding opening; the bars being mounted for longitudinal sliding movement in the outer ends of the end members and movable between inoperative positions within the members and operative positions extending beyond the ends of the end members to abut the supports on which the members bear to force the respective bearing portions from the supports, and means extending through an opening in one of the end members into a recess in one of the bars for moving each of the dismounter bars between the positions.
Short et al., U.S. Pat. No. 2,726,743 describes a girder comprising a pair of open-web I-beams, means, at longitudinally spaced stations connecting adjacent flange edges of the beam in a manner to secure the beams in spaced parallel relationship defining a continuous passageway therebetween, bounded on its sides by the respective webs of the beams and on its top and bottom by the respective adjacent upper and lower flanges of said beams and said connecting means, said adjacent flanges at the bottom of the passageway defining a pair of spaced tracks there along, the adjacent parallel flanges at the top of the passageway defining a pair of tracks there along opposed to the lower tracks, a second pair of open-web I-beams of lesser height and width than said passageway in said first pair of I-beams, means securing the second pair of I-beams in parallel relationship at the adjacent corresponding edges of their upper and lower flanges, the second pair of I-beams being retractable and extensible in the passageway defined by said first pair of I-beams, opposed anti-friction roller means between the first and second pair of I-beams, engageable along the upper and lower pairs of tracks respectively for centering the second pair of I-beams within the first pair of I-beams, and for facilitating longitudinal telescoping movement of said first and second pairs of I-beams, the roller means comprising transverse bearing sleeves welded to the web of the second beam in alignment, and axle extending through said sleeves, and individual rollers on said axle outwardly of the web of the second pair of I-beams in engagement with the flange of the first pair of I-beams, and other of the individual rollers inwardly of the webs of the second pair of I-beams in engagement with the flanges of the second pair of I-beams.
Kimball, U.S. Pat. No. 2,841,634 describes a tubular pole that comprises a plurality of nonmetallic telescopic sections and with the sections of the pole being of substantially identical diameter for the major height of the pole, a metallic conductor embedded within each of the sections and with the conductors having outwardly and inwardly exposed portions whereby the conductors of adjacent sections have in overlying frictional contact when the sections are in telescoped relation to form a continuous electrical conductor throughout the height of the pole, the conductors lying wholly within the pole against external exposure when the sections are assembled.
Young, U.S. Pat. No. 3,039,731 describes an extensible column for supporting an overhead roof structure relative to a floor slab or the like comprising, a pair of load-bearing tubes each having a relatively thin cylindrical wall, cross members joining said tubes rigidly in spaced parallel relationship, an extensible stud having a relatively thin cylindrical wall telescopically interfitting an endwise portion of each load-bearing tube, each stud having a portion projecting outwardly beyond the end of said load-bearing tube, an endwise portion of the stud being flattened and providing an anchor plate projecting from the end portion of the stud at right angles to the axis thereof, the anchor plate being integral with the cylindrical wall of the stud, the anchor plate having fold portions integral with the end of the cylindrical wall of the stud and doubled over upon the anchor plate, the fold portions extending outwardly and joined to the outer edges of the anchor plate at opposite sides, the fold portion providing a rigid connection adapting the anchor plate to resist angular deflection relative to the stud, the end portion of each load-bearing tube opposite the stud having an anchor plate projecting therefrom at right angles to the axis of the load-bearing tube, the column adapted to be interfitted in upright position between the floor slab and roof structure with the studs extended and with the anchor plates seated against the floor slab and roof structure, and means for locking the extensible studs relative to the load-bearing tubes, thereby adapting the column to carry the weight load of the roof structure.
Black, U.S. Pat. No. 3,078,970 describes a section of a sectional adjustable truss-type bridge joist, a prefabricated section comprising, in combination, a linearly straight upper angle iron, a complemental linearly straight lower angle iron parallel to and spaced below the upper angle iron, the angle irons being of duplicate cross-section and each including a vertical flange and a horizontal flange, the vertical flanges being in a common plane, the corresponding inner ends of the upper and lower angle irons terminating together a flat-faced plate of a cross-sectional thickness corresponding to the thickness of the vertical flanges of the angle irons and interposed between and welded to the cooperative lengthwise edges of the flanges, and a vertical longitudinal edge of the plate being flush with the cooperating terminal ends of the vertical flanges, the vertical flanges having several bolt holes cooperating with the transverse end portions of the plate, the end of the upper angle iron opposite to the locale of the plate extending beyond the corresponding end of the lower angle iron and being provided with L-shaped fixedly attached cleats, the cleats providing bearing seats, and diagonal braces connecting the upper and lower angle irons together.
Land, U.S. Pat. No. 3,083,795 describes a building wall comprising first channel means secured to the building ceiling and having downwardly depending spaced apart substantially parallel flanges, second channel means secured to the building floor and having upwardly extending
Crane Daniel C.
Gene Scott-Patent Law & Venture Group
LandOfFree
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