Abstract: In the operation of a track chain assembly a high degree of wear is normally experienced due to the environment in which a track-type machine must operate. This wear is typically accelerated by foreign matter that is carried by an idler member of the track chain assembly and is permitted to remain on its contact surfaces as they engage the other track chain components. The present invention provides a scraper assembly that defines a plurality of scraping portions that are adapted to carry a scraping insert on an end portion thereof. The scraping inserts are continuously urged into engagement with the contact surfaces of the idler to remove foreign material therefrom before the contact surfaces engage other track chain components.

Abstract: In the operation of a track chain assembly a high degree of wear is normally experienced due to the environment in which a track-type machine must operate. This wear is typically accelerated by foreign matter that is carried by an idler member of the track chain assembly and is permitted to remain on its contact surfaces as they engage the other track chain components. The present invention provides a scraper assembly that defines a plurality of scraping portions that are adapted to carry a scraping insert on an end portion thereof. The scraping inserts are continuously urged into engagement with the contact surfaces of the idler to remove foreign material therefrom before the contact surfaces engage other track chain components.

Abstract: PCT NO. PCT/US79/00943 Sec. 371 Date Nov. 5, 1979 Sec. 102(e) Date Nov. 5, 1979, PCT Filed Nov. 5, 1979.A shear seal assembly (80) for sealing between two members (22,36) having limited relative motion therebetween has an inner sleeve (86), an outer sleeve (88), and an elastomeric member (90) connecting the sleeves (86,88). The inner sleeve (86) is in a press fit relationship with one of the members (22) and the outer sleeve (88) is in a press fit relationship with the other of the members (36). Thrust members (92,93) extending radially outwardly along the sides (94,96,98,99) of the seal assembly (80) control distortion thereof and prevent damage thereto. A protective member (93, 100) prevents the ingress of external contaminants and abrasives into the area to be sealed.