Railway rolling stock – Trucks – Bogie
Patent
1976-12-01
1978-08-22
Hoffman, Drayton E.
Railway rolling stock
Trucks
Bogie
105182R, 252 12, 308138, 308238, B61F 514, C10M 500, C10M 700, F16C 3324
Patent
active
041080807
ABSTRACT:
A railway car truck assembly includes spaced side frames supported by truck journal bearings. A bolster extends transversely between the side frames. A spring assembly is supported on the spaced side frames and engages the lower surface of the boltster. The bolster includes a center bearing and a pair of side bearings mounted on either side of the center bearing. The side bearings receive the weight of the car body. Each of the side bearings includes an upper surface made of a first low friction material. The car body includes a depending center portion engaging the center bearing and spaced side portions having a lower surface made of a second low friction material engaging the side bearings. One of the first and second low friction materials is selected from nylon polyesters, polycarbonates, polyacetals and polysulfones. The other of the first and second low friction materials is selected from polytetrafluoroethylene. The coefficient of friction between the upper and lower surfaces is sufficiently low that the truck easily rotates with respect to the car body. The second low fricion material may optionally include a polymeric polyolefin component such as polyethylene, having a low exchange time, and the minor amount of a chemically inert fluorinated hydrocarbon polymeric material such as polytetrafluoroethylene.
REFERENCES:
patent: B559142 (1976-03-01), Hussey
patent: 2126339 (1938-08-01), Miller
patent: 2594079 (1952-04-01), Settles et al.
patent: 2695425 (1954-11-01), Stott
patent: 2698208 (1954-12-01), Dilg
patent: 2699656 (1955-01-01), Anderson et al.
patent: 2879301 (1959-03-01), Stewart et al.
patent: 2975128 (1961-03-01), Stott
patent: 2995381 (1961-08-01), Melton et al.
patent: 2998397 (1961-08-01), Riesing
patent: 3011219 (1961-12-01), Williams
patent: 3013967 (1961-12-01), Rulon-Miller et al.
patent: 3108830 (1963-10-01), Fierstine
patent: 3126339 (1964-03-01), Stott
patent: 3285197 (1966-11-01), Tack
patent: 3287288 (1966-11-01), Reiling
patent: 3305325 (1967-02-01), LeBrasse et al.
patent: 3401991 (1968-09-01), MacDonnell
patent: 3554618 (1971-01-01), Ditzler et al.
patent: 3570409 (1971-03-01), Delkers
patent: 3779918 (1973-12-01), Ikeda et al.
patent: 3879301 (1975-04-01), Cairns
patent: 3908038 (1975-09-01), Nienart et al.
patent: 3912343 (1975-10-01), Paton et al.
patent: 4030424 (1977-06-01), Garner et al.
Fluorogold Side Bearings, The Fluorocarbon Company, Oct. 1967, pp. 1-9 inclusive.
Rulon Standard Stock Bearings Engineering Manual, Dixon, 1973, pp. 1-12 inclusive.
Garner Gerald D.
Hammonds James C.
Holt Jan D.
Melcher Conway H.
ACF Industries Incorporated
Beltran Howard
Cummings Henry W.
Hoffman Drayton E.
LandOfFree
Railway car truck and side bearing assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Railway car truck and side bearing assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Railway car truck and side bearing assembly will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1550919