Plastic article or earthenware shaping or treating: apparatus – Control means responsive to or actuated by means sensing or... – Feed control of material en route to shaping area
Reexamination Certificate
2011-07-19
2011-07-19
Johnson, Christina (Department: 1742)
Plastic article or earthenware shaping or treating: apparatus
Control means responsive to or actuated by means sensing or...
Feed control of material en route to shaping area
C425S135000, C222S482000
Reexamination Certificate
active
07980843
ABSTRACT:
A concrete dispensing apparatus is used in a manufacturing process for producing pre-cast concrete structures, which are conventionally used to form a foundation for a residential or commercial building. The dispensing apparatus includes a hopper that funnels to a discharge opening extending along the entire transverse length of the dispensing apparatus. A plurality of individually controlled gates cover the entire discharge opening for selectively controlling the length and location of the discharge opening through which concrete is dispensed. The dispensing apparatus also includes a finishing mechanism including a vibratory screed and a rotational finishing roller. The form can be moved relative to the dispensing apparatus or vice versa. A form vibrator induces a vibratory motion into the form to remove air from the dispensed concrete mixture. Operative control is accomplished through an operator control panel operable to control a hydraulic system powering the operative functions of the dispensing apparatus.
REFERENCES:
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patent: 3833693 (1974-09-01), Ross
patent: 4278190 (1981-07-01), Oory et al.
patent: 4624195 (1986-11-01), Doering
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patent: 6494004 (2002-12-01), Zimmerman
patent: 2002/0141822 (2002-10-01), Sterner
Hildebrand Matthew S.
Martin Carl S.
Zimmerman Melvin M.
Hauth Galen
Johnson Christina
Miller Law Group PLLC
SWA Holding Company, Inc.
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