Abstract: A concrete product molding machine supports a vibratable mold having an open top and an open bottom. A stripper head is movable from a position above the mold to an intermediate position ready to strip the molded product from the mold and then on to a lower position in which it has. A pallet receiver is movable from a lower position to a mold closing position in which a pallet it carries closes the bottom of the mold. Disengageable linking mechanism is provided for coupling the striper head and pallet receiver frame for conjoint travel in movement of the stripper head through the mold. A connector assembly connects with a pallet receiver lift arm and incorporates an actuator for varying the position of the upper end of the lift arm and thereby varying the vertical position of the pallet receiver.

Abstract: A concrete product molding machine supports a vibratable mold having an open top and an open bottom. A stripper head is movable from a position above the mold to an intermediate position ready to strip the molded product from the mold and then on to a lower position in which it has. A pallet receiver is movable from a lower position to a mold closing position in which a pallet it carries closes the bottom of the mold. Disengageable linking mechanism is provided for coupling the striper head and pallet receiver frame for conjoint travel in movement of the stripper head through the mold. A connector assembly connects with a pallet receiver lift arm and incorporates an actuator for varying the position of the upper end of the lift arm and thereby varying the vertical position of the pallet receiver.

Abstract: Machinery and methods for making concrete blocks includes an open top and open bottom mold supported on a machine's frame when the mold is at rest. A pallet support beneath the mold is movable upwardly by means of a pallet lifter frame to clamp a pallet against the bottom of the mold. Upward movement of the pallet support is accompanied by upward movement of the mold off the frame to enable vibration of the mold without the generation of noise between the mold and the frame. A stripper head is supported above the mold for entry into the latter during vibration of the mold to assist in compacting moldable material within the mold. The stripper head is carried by a movable frame the movements of which are controlled by a cam and an interconnecting linkage, and the stripper head is vertically movable relative to the frame. Inflatable/deflatable cushions or absorbers are interposed between the stripper head and the stripper head frame to minimize noise.

Abstract: A mechanical vibrator assembly adapted to be attached to a device to be vibrated and wherein a shaft has a first weight system eccentrically fixed to the shaft, and a second axially displaced balancing weight system rotatable on the shaft. Stop surfaces limit rotation of the second weight system to approximately 180.degree., from a counterbalancing position substantially 180.degree. removed from the first weight system to a shaft vibrating position just short of circumferential alignment with the first weight system. A motor drives the shaft in a direction of rotation such that a slackening of speed removes the second weight system to the 180.degree. removed balanced position.

Abstract: Apparatus for suppressing noise generated by a concrete or the like block making machine having a vibratable open bottom mold against the bottom of which the pallet is clamped to close the mold and provide a support for the molded block. The pallet support and the mold are sandwiched between yieldable, compressible, opposed force applying members which clamp the pallet to the mold and maintain the mold in a state of suspension during its vibration. The clamping of the pallet to the mold and the suspension of the mold greatly minimize noise generated by vibration of the mold.