Knee assembly for a sawmill carriage

Details Knee assembly for a sawmill carriage Knee assembly for a sawmill carriage

1990-01-02

1991-08-13

Yost, Frank T.

Cutting

With means to convey work relative to tool station

Plural passes of diminishing work piece through tool station

83718, 83720, B27B 2910

Patent

active

050386522

ABSTRACT:
A sawmill carriage is provided with crosswise disposed guideways along which knee members travel for advancement of a log toward a saw plane. Linear actuators for each knee member are embodied in parallel hydraulic cylinders above and below a slide also on the guideway to reduce overall carriage width. A first linear actuator serves to position the slide while the remaining linear actuator is carried by the slide and has a piston rod end coupled to the knee member. The linear actuators function both in singular and in simultaneous modes to provide desired knee member movement and speed. The linear actuators are of the type providing a feedback signal which is processed by a controller for programmed operation of the actuators. Rail components of the guideways support the knee member and the slide on separate portions of the rails.

REFERENCES:
patent: 384228 (1888-06-01), Anderson et al.
patent: 540357 (1895-06-01), Hanson
patent: 1804716 (1931-05-01), Tanner
patent: 2551824 (1951-05-01), Coote
patent: 3068914 (1962-12-01), Sanborn
patent: 4037502 (1977-07-01), Westfall
patent: 4344609 (1982-08-01), Bond

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