End dogging sawmill carriage with independent drives releasably

Details End dogging sawmill carriage with independent drives releasably End dogging sawmill carriage with independent drives releasably

1990-01-16

1991-03-05

Watts, Douglas D.

Cutting

With means to convey work relative to tool station

Cut made parallel to direction of and during work movement

83707, 83731, 144245A, 144245E, 1984682, 198621, 198748, B27B 2908

Patent

active

049969005

ABSTRACT:
An end dogging sawmill carriage is described, including a pair of front and rear carriage units having dogs which engage the opposite ends of a log and a pair of independent drives for such carriage units. The pair of drives are temporarily connected together by a releasable connector means to maintain the log clamped between the carriage units as such pair of drives share the load and both drive the log through the primary breakdown log cutting apparatus. The releasable connector can by a cylinder actuated cable clamp mounted on the rear carriage unit for clamping the first drive cable of the front carriage unit in response to an electrical control signal applied to a solenoid valve for operating the clamp cylinder. In another embodiment the releasable connector is a solenoid actuated lock which operates a latch member to selectively engage one of a plurality of notches spaced along a notched connecting rod attached between the end of the first cable and the front carriage. A third embodiment of the releasable connector is a solenoid valve actuated brake for engagement with an unnotched connecting rod.

REFERENCES:
patent: 3503428 (1970-03-01), Ackerfeldt
patent: 3779117 (1973-12-01), Roberson et al.
patent: 4317398 (1982-03-01), Jones et al.
patent: 4338986 (1982-07-01), Detjen
patent: 4422487 (1983-12-01), McCurdy
patent: 4697487 (1987-10-01), Cameron

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