US3557709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railway car
Assignee: Hagglund and Soner AB
•
Filing: 1968-09-27
•
Granted: 1971-01-26
•
Expires: 1988-09-27
Abstract
Abstract A railcar has a bogie with front and rear frame sections, each of which has a frame consisting of two T-shaped elastically interconnected transoms, while the car body is supported upon the two frameworks by pneumatic springs connected in series with helical steel springs. The present invention is particularly characterized in that the pneumatic and helical springs are rigidly fixed at their interconnections to the outer ends of a Ushaped yoke the central portion of which consists of a torsionally stiff body extending the entire width of the car; this element is subject to torsion and is rotatably mounted in the car body. The cross-sectional central plane of the frame sections is shifted in the direction toward the corresponding end of the car body, whereby the forces exerted upon the car body are transmitted to the frame section through a pin rigidly fixed in the car body and coupling rods provided upon the upper end of the pin and extending transversely to the direction of motion. The acceleration forces between the frame section and the car body are transmitted from the lower end of said pin and through a contact point located upon the framework, the height of which above the edge of the rails is approximately equal to the height of the free passage of the frame section.
Inventors
- 👤 Karl E Hilfing
- 👤 Nils Artur Pettersson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:23
CPC Classifications
B; B61; B61F; B61F5/00; B61F5/02; B61F5/04; B61F5/10
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
530 words
A railcar comprising a bogie having two elongated parallel side beams and two parallel transverse beams, one of said transverse beams having an end firmly connected to one of said side beams, the other transverse beam having an end firmly connected to the other one of said side beams, means pivotally and elastically connecting the other end of said one transverse beam to said other side frame, means pivotally and elastically connecting the other end of said other transverse beam to said one side frame, a car body, two superposed vertically extending spring suspension devices, one of said spring suspension devices having a top end connected to said car body, the other one of said spring suspension devices having a bottom end connected to said one transverse beam, two other superposed vertically extending spring suspension devices, one of the last-mentioned spring suspension devices having a top end connected to said car body, the other one of the last-mentioned spring suspension devices having a bottom end connected to said other transverse beam, the first-mentioned two-spring suspension devices and the last-mentioned two-spring suspension devices having a common vertical central transverse plane which is shifted in the direction toward the end of the car nearest thereto relatively to the vertical transverse plane extending through the middles of said transverse beams, a U-shaped torsional yoke comprising a torsion tube pivotally carried by said car body and two arms, one of said arms having an end rigidly fixed between the two firstmentioned spring suspension devices, the other one of said arms having an end rigidly fixed between the two last-mentioned spring suspension devices, whereby said ends of the two arms can move vertically but can not move horizontally, a telescopic vertical member located centrally between said side beams, a double arm extending in the longitudinal direction of the car and firmly connected to opposite sides of said telescopic member, two coupling rods, extending transversely to the direction of the car a ring connecting one end of one of said coupling rods with one end of said double arm, another ring connecting one end of the other one of said coupling rods with the other end of said double arm, yet another ring connecting the other end of said one coupling rod with one of said side beams, a further ring connecting the other end of said other coupling rod with the other one of said side beams, the top of said telescopic vertical member being connected to said car body, whereby side forces of said car body are transmitted to said beams, another double arm located below the first-mentioned double arm, extending transversely to the direction of the car and firmly connected to opposite sides of said telescopic member, two coupling members, extending in the direction of the car each of said coupling members having an end connected to a different end of said other double arm, and two brackets, each of said brackets being connected to different transverse beam and located below the beam, said coupling members having other ends connected with said brackets and situated at a height from the ground which is substantially equal to the free passage height of the bogie.
Claim 2
Dependent Claim
530 words
A railcar comprising a bogie having two elongated parallel side beams and two parallel transverse beams, one of said transverse beams having an end firmly connected to one of said side beams, the other transverse beam having an end firmly connected to the other one of said side beams, means pivotally and elastically connecting the other end of said one transverse beam to said other side frame, means pivotally and elastically connecting the other end of said other transverse beam to said one side frame, a car body, two superposed vertically extending spring suspension devices, one of said spring suspension devices having a top end connected to said car body, the other one of said spring suspension devices having a bottom end connected to said one transverse beam, two other superposed vertically extending spring suspension devices, one of the last-mentioned spring suspension devices having a top end connected to said car body, the other one of the last-mentioned spring suspension devices having a bottom end connected to said other transverse beam, the first-mentioned two-spring suspension devices and the last-mentioned two-spring suspension devices having a common vertical central transverse plane which is shifted in the direction toward the end of the car nearest thereto relatively to the vertical transverse plane extending through the middles of said transverse beams, a U-shaped torsional yoke comprising a torsion tube pivotally carried by said car body and two arms, one of said arms having an end rigidly fixed between the two firstmentioned spring suspension devices, the other one of said arms having an end rigidly fixed between the two last-mentioned spring suspension devices, whereby said ends of the two arms can move vertically but can not move horizontally, a telescopic vertical member located centrally between said side beams, a double arm extending in the longitudinal direction of the car and firmly connected to opposite sides of said telescopic member, two coupling rods, extending transversely to the direction of the car a ring connecting one end of one of said coupling rods with one end of said double arm, another ring connecting one end of the other one of said coupling rods with the other end of said double arm, yet another ring connecting the other end of said one coupling rod with one of said side beams, a further ring connecting the other end of said other coupling rod with the other one of said side beams, the top of said telescopic vertical member being connected to said car body, whereby side forces of said car body are transmitted to said beams, another double arm located below the first-mentioned double arm, extending transversely to the direction of the car and firmly connected to opposite sides of said telescopic member, two coupling members, extending in the direction of the car each of said coupling members having an end connected to a different end of said other double arm, and two brackets, each of said brackets being connected to different transverse beam and located below the beam, said coupling members having other ends connected with said brackets and situated at a height from the ground which is substantially equal to the free passage height of the bogie.
Claim 3
Dependent Claim
19 words
A car in accordance with claim 1 wherein said spring suspension devices comprise pneumatic springs and coiled steel springs.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |