Machine element or mechanism – Control lever and linkage systems – Hand operated
Patent
1978-04-12
1981-11-24
Dorner, Kenneth
Machine element or mechanism
Control lever and linkage systems
Hand operated
74801, G05G 108, F16H 128, B66D 122
Patent
active
043016936
ABSTRACT:
A hand brake for railroad cars comprising a winding drum journaled within its housing to be in concentric relation with the hand brake operating shaft. A brake chain wind up and let out control mechanism is interposed between the brake drum and the operating shaft, with the winding drum being journaled between a pair of annular bearing plates that are concentric with the shaft and fixed to the housing in spaced apart relation to receive the winding drum. The shaft is coupled to the winding drum by a sun and planetary gear reducer mechanism in which a plurality of planetary gear assemblies are mounted on one or more circular lands concentric with the operating shaft for free rolling non-journaled orbiting movement about the sun gear that is keyed to the operating shaft for rotation by same to effect wind up and let up of the brake chain. The sun and planetary gear mechanism has its parts oriented to provide a central drive input and output with balanced internal force applying and resisting characteristics. Brake chain take up and let out is effected by the operator manually operating the operating shaft, and no separate brake chain release mechanism is need or provided for.
REFERENCES:
patent: 276776 (1883-05-01), Clemons
patent: 301096 (1884-07-01), Clemons
patent: 1366676 (1921-01-01), O'Connor
patent: 1766273 (1930-06-01), Wine
patent: 1993977 (1935-03-01), O'Connor
patent: 2282736 (1942-05-01), Mersereau
patent: 3640150 (1972-02-01), Leiner et al.
patent: 3826154 (1974-07-01), Motus et al.
patent: 3998430 (1976-12-01), Weseloh
Product Engineering, John H. Glover, "Planetary Gear Systems", Jan. 6, 1964, pp. 59, 60.
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