Railway draft appliances – Cushioned – Combined spring and friction
Patent
1984-02-27
1986-03-18
Reeves, Robert B.
Railway draft appliances
Cushioned
Combined spring and friction
213 22, 213 37, 267 9A, B61G 910
Patent
active
045762953
ABSTRACT:
A draft gear to absorb and cushion impacting forces on a railroad car coupler system includes a spring package in an inner section of a housing of the gear. The spring package connects with a set of friction shoes carried in friction shoe seats formed in an outer friction bore section of the housing. The shoes in turn engage with a wedge which extends from the housing outer end. In each friction shoe seat is a grooved recess having an inner, outer, and connecting groove portion arranged in an H-like shape. In each grooved recess in turn is a metallic insert to provide a film of lubricant between the shoes and friction shoe seats respectively. During operation the impacting forces on the coupler system drive the wedge and shoes inward to compress the spring package. This movement is restrained by friction between the shoes and friction shoe seats. Because the inserts are rigid, insert material in the outer groove portions is not readily dislodged, if the shoes move sufficiently inward to expose the outer groove portions. Thus, the coefficient of friction between the shoes and friction shoe seats remains properly regulated to insure continued effective frictional restraint. Additionally, the shoes are inhibited from being stuck when the draft gear is in a compressed state.
REFERENCES:
patent: 948316 (1910-02-01), Finning
patent: 1396896 (1921-11-01), Symons
patent: 1426022 (1922-08-01), Thomson
patent: 1914479 (1933-06-01), Brooks
patent: 2079088 (1937-05-01), Spence
patent: 2242414 (1941-05-01), Blattner
patent: 2558117 (1951-06-01), Withall
patent: 3348633 (1967-10-01), Allan
Miner Enterprises Inc.
Reeves Robert B.
Rodgers Dennis C.
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