Patent US4235170A successfully refreshed from Google Patents.
US4235170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railway car underframe end sill
Assignee: Bombardier Corp
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Filing: 1978-10-30
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Granted: 1980-11-25
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Expires: 1998-10-30
Abstract
Abstract An end underframe structure having an open box structure forming a rigid unit capable of receiving high torsional or other forces developed in a railway car and includes primary and secondary end sills connected by side buffer members. Additional buffer members connect the secondary end sill to a bolster. Draft sill means extend from the center of the primary end sill to the center of the bolster member.
Inventors
- 👤 Horace P. Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:14
CPC Classifications
B; B61; B61D; B61D17/00; B61D17/04; B61D17/06; B61F; B61F1/00; B61F1/08; B61F1/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
141 words
An end underframe structure for a railway car comprising: (a) a primary end sill extending transversely across the front of said car, (b) a secondary end sill spaced and parallel to said primary end sill, (c) a bolster member, (d) a first pair of side buffer members connecting said primary and secondary end sills, (e) a girder web positioned over said sills and said first pair of buffer members and being connected thereto for forming an open box structure having increased strength, (f) a second pair of side buffer members connecting said secondary end sill to said bolster member, and (g) a draft sill member centrally disposed between said first and second pairs of said side buffer members and extending longitudinally with respect to said car from the center of said primary end sill to the center of said bolster member.
Claim 2
Dependent Claim
141 words
An end underframe structure for a railway car comprising: (a) a primary end sill extending transversely across the front of said car, (b) a secondary end sill spaced and parallel to said primary end sill, (c) a bolster member, (d) a first pair of side buffer members connecting said primary and secondary end sills, (e) a girder web positioned over said sills and said first pair of buffer members and being connected thereto for forming an open box structure having increased strength, (f) a second pair of side buffer members connecting said secondary end sill to said bolster member, and (g) a draft sill member centrally disposed between said first and second pairs of said side buffer members and extending longitudinally with respect to said car from the center of said primary end sill to the center of said bolster member.
Claim 3
Dependent Claim
42 words
An end underframe structure as set forth in claim 1 wherein said first pair of side buffer members are connected longitudinally of said car substantially from the ends of said primary end sill substantially to the ends of said secondary end sill.
Claim 4
Dependent Claim
33 words
An end underframe structure as set forth in claim 2 wherein said second pair of side buffer members are connected longitudinally of said car from ends of said secondary sill to said bolster.
Claim 5
Dependent Claim
30 words
An end underframe structure as set forth in claim 3 wherein said first pair of side buffer members are disposed below door openings at the side ends of said car.
Claim 6
Dependent Claim
40 words
An end underframe structure as set forth in claim 4 wherein said first pair of side buffer members are recessed at an angle between said primary and secondary end sills to permit stairway attachments thereto and to provide wheel clearance.
Claim 7
Dependent Claim
23 words
An end underframe structure as set forth in claim 5 wherein said first and second side buffer members comprise relatively large tubular members.
Claim 8
Dependent Claim
54 words
An end underframe structure as set forth in claim 6 wherein a coupler carrier arrangement is disposed on said primary end sill in alignment with said draft sill to permit coupling elements to be set back into said coupler carrier so that forces exerted on said coupling element are transmitted to said draft sill.
Claim 9
Dependent Claim
42 words
An end underframe structure as set forth in claim 7 wherein said first and second side buffer members are longitudinally disposed with respect to said car in alignment with buffer elements adapted to be fitted to the bottom end of said car.
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) | 1983-11-25 | 1984-05-26 | 1984-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-25 | 1988-05-26 | 1988-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-25 | 1992-05-26 | 1992-11-25 | $7700.00 | Window Closed / Lapsed |