Wheel substitutes for land vehicles – With means to remove or exclude foreign matter – With end seal between bushing and track link
Reexamination Certificate
2005-10-04
2005-10-04
Bucci, David A. (Department: 3682)
Wheel substitutes for land vehicles
With means to remove or exclude foreign matter
With end seal between bushing and track link
C305S104000, C277S628000, C474S901000
Reexamination Certificate
active
06951373
ABSTRACT:
A seal (21) is constituted by an outer lip portion (22) to be held in abutting engagement with an outer link portion (9) of a crawler belt (7), an inner lip portion (23) to be held in abutting engagement with a bush (11), and an interconnecting bridge portion (24) bridged and connected between the outer and inner lip portions (22, 23). The outer lip portion (22) on the side of track link, the inner lip portion (23) on the side of bush, and outer bridge portion (24A) and inner bridge portion (24B) of the interconnecting bridge portion (24) are formed in thicknesses (T1, T2, T1′ and T2′), respectively, which are in the relations of (T2≈T2′>T1≈T1′). A maximum outside diameter portion (24C) of the interconnecting bridge portion (24) is located radially outward of a median point between inner and outer peripheral ends of the lip portion (23) on the side of bush. The inner lip portion (23) as a whole is uniformly pressed against an end face (11A) of the bush (11) by the interconnecting bridge portion (24).
REFERENCES:
patent: 3909076 (1975-09-01), Kato
patent: 3948574 (1976-04-01), Baylor
patent: 3958836 (1976-05-01), Brown et al.
patent: 3975028 (1976-08-01), Satsumabayashi et al.
patent: 4062550 (1977-12-01), Satsumabayashi et al.
patent: 4204716 (1980-05-01), Baylor
patent: 4364572 (1982-12-01), Yamamoto et al.
patent: 49-113342 (1974-09-01), None
patent: 52-61029 (1977-05-01), None
patent: 1-65773 (1989-04-01), None
Akita Hideki
Sekiguchi Yoshiaki
Bucci David A.
Hitachi Construction Machinery Co. Ltd.
Mattingly ,Stanger ,Malur & Brundidge, P.C.
Van Pelt Bradley J.
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