Brake shoe hold down spring

Details Brake shoe hold down spring Brake shoe hold down spring

1992-05-28

1993-04-13

Oberleitner, Robert J.

Brakes

Wheel

Transversely movable

411347, F16D 5100

Patent

active

052013901

ABSTRACT:
The shoe hold down spring (40) comprises a single wave form or serpentine shaped leaf spring (40) which is engaged at opposite ends (42, 44) by hold down pins (53, 55) of a drum brake. The hold down pins (53, 55) are connected with the backing plate (12) and extend through respective openings (21, 23) within a brake shoe web (20). The hold down spring (40) includes opposite ends (42, 44) and a middle portion (41) all of which extend away and are spaced-apart from the shoe web (20), and two intermediate curved portions (47, 49) which engage the web (20). The opposite ends (42, 44) of the hold down spring (40) have slots (43, 45) extending inwardly from spring edges (42A, 44A), and small curved recesses (42B, 44B) which effect securement of ends (53A, 55A) of the pins (53, 55) to the spring (40). The pins (53, 55) have laterally extending wings (53B, 55B) at the pin ends (53A, 55A) which are received within the small curved recesses (42A, 44A) at the respective ends (42, 44) of the spring (40).

REFERENCES:
patent: 1803396 (1931-05-01), Brie
patent: 1904262 (1933-04-01), Bendix et al.
patent: 2022254 (1935-11-01), Pentz
patent: 2263949 (1941-11-01), Harle
patent: 3232388 (1966-02-01), Gancel
patent: 4623050 (1986-11-01), Copp
patent: 4790704 (1988-12-01), Tempe et al.

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