摘要:
A wheeled strike-off apparatus (10) is movable over a surface of uncured concrete or subgrade materials and is operable to establish a desired grade of the uncured concrete surface or subgrade surface. The apparatus includes a wheeled support (12) and a plow assembly (14). The wheeled support may have a front frame portion (212a) and a pair of front wheels (224) rotatably mounted at the front frame portion, and may have a rear frame portion (212b) and a pair of rear wheels (226) rotatably mounted at the rear frame portion. The plow assembly may be adjustably mounted to the front frame portion and may be vertically adjustable relative to the frame portion via an actuator (230). The plow assembly includes at least one plow member (218) for engaging and establishing the desired grade.
摘要:
A soft landing control system (10) for a screeding device (12) is operable to automatically lower a vibrating member (24) of a screed head assembly (14) into engagement with a concrete surface at a time and place where the vibrating member is not positioned over an overlap area of already screeded concrete. The vibrating member is automatically lowered onto newly placed concrete at or near the junction or cold-joint between the already screeded concrete and the area of newly placed concrete, so as to avoid depressions in the already placed concrete. Optionally, the soft landing control system may include a timing device and may lower the vibrating member after a period of time following an activating event. Optionally, the control system may detect when the vibrating device is positioned at or near the newly placed concrete and may lower the vibrating member in response to such detection.
摘要:
A screeding machine comprising at least one of (a) a boom speed cruise control for automatically controlling the travel speed of the screed head assembly, (b) an auto-stabilizer control that automatically adjusts the stabilizer actuators of the screeding machine to a preselected degree of extension, (c) a control for automatically controlling the lowering of the screed head assembly toward and to the concrete surface and automatically activating the auger and vibrator at a beginning of each screeding pass and automatically deactivating the auger and vibrator in response to the screed head assembly being raised away from the concrete surface at the end of a screed pass, and (d) an auto-screed mode that allows the operator to select maximum values for at least one of a boom extension speed, a boom retraction speed, a boom rotation speed and a screed head rotation speed.
摘要:
A wheeled strike-off apparatus (10) is movable over a surface of uncured concrete or subgrade materials and is operable to establish a desired grade of the uncured concrete surface or subgrade surface. The apparatus includes a wheeled support (12) and a plow assembly (14). The wheeled support may have a front frame portion (212a) and a pair of front wheels (224) rotatably mounted at the front frame portion, and may have a rear frame portion (212b) and a pair of rear wheels (226) rotatably mounted at the rear frame portion. The plow assembly may be adjustably mounted to the front frame portion and may be vertically adjustable relative to the frame portion via an actuator (230). The plow assembly includes at least one plow member (218) for engaging and establishing the desired grade.