Fluid dampening side bearings

Claim 2

In a railway vehicle, a car bolster overlying and supported upon a truck bolster by means of bearing surfaces at their respective centers, a compressible side bearing having a first part secured to the truck bolster and a second part spaced from said first part and engaging the car bolster, a first elastomer ring secured between said first and second part, a second elastomer ring of larger diameter than the first ring and concentric therewith, and a rigid ring surrounding said second elastomer ring, said second elastomer ring being connected between said first part and said rigid ring and hydraulic means surrounded by said elastomer rings, said hydraulic means yieldingly resisting movement of said first and second parts toward one another and allowing substantially free movement of said parts away from one another.

Claim 3

The combination according to claim 1 wherein said rigid ring surrounding said second elastomer ring is dimensioned to engage said second part before said first elastomer ring attains maximum compression.

Claim 4

The combination according to claim 1 wherein said hydraulic means comprises a lower hydraulic chamber in said first part and an upper hydraulic chamber in said second part, hydraulic fluid in said lower chamber and a portion of said upper chamber, a one-way metering valve from said lower chamber to said upper chamber operative to restrict fluid flow thereto, and a one-way dump valve from said upper chamber to said lower chamber operative to allow substantially free flow of hydraulic fluid thereto.

Claim 5

The combination according to claim 3 wherein an elastomer ring is connected between said first and second parts and forms a seal for said lower hydraulic chamber.

Claim 6

In a railway vehicle including a truck having a pair of spaced side frames and a bolster resiliently supported between said side frames, and a car body having a bolster overlying and supported upon said truck bolster by means of engaging bearing surfaces at the respective centers thereof, said car bolster being otherwise spaced from said truck bolster, the improvement comprising a side bearing secured to the top of the truck bolster between the bearing surface thereof and each side frame, said side bearing comprising a lower part secured to said truck bolster and an upper part spaced from said lower part and engaging said body bolster, hydraulic means to yieldingly resist movement of said upper and lower parts toward one another and permitting substantially free movement of said parts away from each other, and a plurality of resilient members between said upper and lower parts and compressible upon movement of said parts toward one another, one of said resilient members being connected between said upper and lower parts, and another of said resilient members connected to said lower part and engageable with said upper part after partial compression of said one resilient member.

Claim 7

In a railway vehicle including a truck having a pair of spaced side frames and a bolster resiliently supported between said side frames, and a car body having a bolster overlying and supported upon said truck bolster by means of engaging bearing surfaces at the respective centers thereof, said car bolster being otherwise spaced from said truck bolster, the improvement comprising a side bearing secured to the top of the truck bolster between the bearing surface thereof and each side frame, said side bearing comprising a lower part secured to said truck bolster and an upper part spaced from said lower part and engaging said body bolster, hydraulic means to yieldingly resist movement of said upper and lower parts toward one another and permitting substantially free movement of said parts away from each other, and a plurality of resilient members between said upper and lower parts and compressible upon movement of said parts toward one another, one of said resilient members being connected between said upper and lower parts, and another of said resilient members connected to said lower part and engageable with said upper part after partial compression of said one resilient member.

Claim 8

A rock control side bearing comprising a base, a rigid upwardly tapered ring secured to said base, a cap spaced from said base, a downwardly tapered cup depending from said base and secured and sealed thereto, said cup having an aperture centrally located therein, the bottom of said cup being spaced from said base, a first elastomer ring connecting the side of said cup to said tapered ring, a rigid ring surrounding said tapered ring and spaced therefrom, said rigid ring being normally spaced from, but engageable with, said cap and said base, a second elastomer ring connecting said rigid ring to said tapered ring, an upper chamber formed by said cap and cup, a lower chamber formed by said cup, base and first elastomer ring, valve means between said upper and lower chambers secured within the aperture of said cup, and hydraulic fluid in said lower chamber and a portion of said upper chamber, said valve means yieldingly resisting flow of hydraulic fluid from said lower chamber to said upper chaMber and allowing substantially free flow of hydraulic fluid from said upper chamber to said lower chamber.

Claim 9

A rock control side bearing comprising a base, a rigid upwardly tapered ring secured to said base, a cap spaced from said base, a downwardly tapered cup depending from said base and secured and sealed thereto, said cup having an aperture centrally located therein, the bottom of said cup being spaced from said base, a first elastomer ring connecting the side of said cup to said tapered ring, a rigid ring surrounding said tapered ring and spaced therefrom, said rigid ring being normally spaced from, but engageable with, said cap and said base, a second elastomer ring connecting said rigid ring to said tapered ring, an upper chamber formed by said cap and cup, a lower chamber formed by said cup, base and first elastomer ring, valve means between said upper and lower chambers secured within the aperture of said cup, and hydraulic fluid in said lower chamber and a portion of said upper chamber, said valve means yieldingly resisting flow of hydraulic fluid from said lower chamber to said upper chaMber and allowing substantially free flow of hydraulic fluid from said upper chamber to said lower chamber.