Conveyors: power-driven – Conveyor frame or casing – Modules connectable end-to-end with no relative movement
Reexamination Certificate
1999-01-29
2001-08-07
Ellis, Christopher P. (Department: 3651)
Conveyors: power-driven
Conveyor frame or casing
Modules connectable end-to-end with no relative movement
C198S685000, C104S094000, C104S108000, C212S177000, C212S225000
Reexamination Certificate
active
06269944
ABSTRACT:
TECHNICAL FIELD
Extruded aluminum alloy beams for bridge cranes and conveyors.
BACKGROUND
Co-assigned U.S. Pat. No. 5,443,151 suggests a serviceable configuration for a beam extruded of an aluminum alloy for use in cranes and conveyors. At least one other configuration of extruded aluminum beams for such purposes also exists. Extruded aluminum offers several advantages over steel, especially if the extrusion profile has an optimum configuration. This invention advances the art of aluminum alloy beam extrusions beyond the suggestions of the '151 patent.
This invention aims at reducing the expense of extruded aluminum alloy beams while making such beams more readily varied and versatile. Versatility is advanced by accommodating several different mounting systems and providing a wide range of beam strengths from a minimum of extruded components. Improved economy occurs from reducing the size and weight of extruded parts and optimizing the use of metal in extrusion profiles.
SUMMARY OF THE INVENTION
A channel portion of an extruded aluminum crane beam is formed separately from any strengthening upper portion that may be required. This allows a channel to be used independently or combined with upper portions varying in strength to produce a range of load-bearing capacities.
The channel portion of the beam is provided with pin receivers that are formed under runs that support wheeled elements on opposite sides of an open bottom of the channel. The pin receivers are formed to add metal under the runs for strengthening purposes, while also providing the convenience of receiving dowel pins that align butt-jointed beam sections.
An upper wall of the channel is formed with a pair of upstanding fins that can receive mounting elements and T-shaped upper strengthening members. Any of these can be secured to the channel by fasteners extending through the upstanding fins. This arrangement makes a variety of different beam installations convenient and facilitates combining channels with upper members of different strengths.
Economies arise from reducing the overall size and weight of extruded components. Versatility results from the ease and convenience of combining different mounts and strengthening upper members with the mounting element formed on the channel.
REFERENCES:
patent: 3687367 (1972-08-01), Schurch et al.
patent: 3855937 (1974-12-01), Cuadill
patent: 3987877 (1976-10-01), Bulanchuk
patent: 4576096 (1986-03-01), Toder
patent: 4768442 (1988-09-01), Miller
patent: 5443151 (1995-08-01), Taylor
patent: 5598784 (1997-02-01), Kubisk et al.
Specification Sheet from Zimmerman International Corp. titled “Cross Section, ZRA2 Strong Back Rail, Part No.: 30000T”, Madison Heights, MI, 1994, one sheet.
Deuble Mark A.
Ellis Christopher P.
Eugene Stephens & Associates
Gorbel, Inc.
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