Concrete dispensing apparatus for pre-cast concrete forms

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

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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:
patent: 2332688 (1943-10-01), Baily
patent: 3833693 (1974-09-01), Ross
patent: 4278190 (1981-07-01), Oory et al.
patent: 4624195 (1986-11-01), Doering
patent: 4751803 (1988-06-01), Zimmerman
patent: 5055252 (1991-10-01), Zimmerman
patent: 5656194 (1997-08-01), Zimmerman
patent: 6494004 (2002-12-01), Zimmerman
patent: 2002/0141822 (2002-10-01), Sterner

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