US4348964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sliding sill low friction supporting plate assembly
Assignee: ACF Industries Inc
•
Filing: 1980-09-22
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Granted: 1982-09-14
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Expires: 2000-09-22
Abstract
Abstract A fixed sill includes a pair of lower, outwardly extending fixed sill flanges. A generally vertical longitudinally extending support plate is integrally connected to each fixed sill flange on each side of the fixed sill. A sliding sill support is rigidly connected to each support plate. The sliding sill support includes a horizontal inwardly extending portion that also extends longitudinally inboard. The sliding sill support is located slightly below the fixed sill flange. A pair of low friction wear plates are adopted to be slipped in place upon each sliding sill support. The low friction wear plates include horizontal body portions on each side of the fixed sill upon which the sliding sill rides in moving back and forth. Each wear plate includes "U" shaped end portions which wrap around in the inner and outer ends of the sliding sill support. The wear plate is made of resilient material having a low coefficient of friction with steel and good strength in compression to withstand the load of the sliding sill.
Inventors
- 👤 Robert W. Randolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:50
CPC Classifications
B; B61; B61D; B61D17/00; B61D17/04; B61D17/043; B61F; B61F1/00; B61F1/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
182 words
A low friction sliding sill support assembly comprising: a fixed sill including a pair of lower, outwardly extending fixed sill flanges; a generally vertical longitudinally extending support plate integrally connected to each fixed sill flange on each side of the fixed sill; a separate longitudinally extending sliding sill support rigidly connected to each support plate; each said sliding sill support also including a horizontal portion that extends transversely inwardly of the car; said sliding sill supports being spaced apart and located below said fixed sill flanges; a pair of low friction material wear plates adopted to be slipped in place upon said sliding sill supports; said wear plates including horizontal body portions on each side of the fixed sill upon which the sliding sill rides moving back and forth relative to said fixed sill; each wear plate including means for engaging the inner and outer ends of its respective sliding sill support; said wear plates being made of resilient material having a low coefficient of friction with steel; and good strength in compression to withstand the longitudinal movement of the sliding sill.
Claim 2
Dependent Claim
182 words
A low friction sliding sill support assembly comprising: a fixed sill including a pair of lower, outwardly extending fixed sill flanges; a generally vertical longitudinally extending support plate integrally connected to each fixed sill flange on each side of the fixed sill; a separate longitudinally extending sliding sill support rigidly connected to each support plate; each said sliding sill support also including a horizontal portion that extends transversely inwardly of the car; said sliding sill supports being spaced apart and located below said fixed sill flanges; a pair of low friction material wear plates adopted to be slipped in place upon said sliding sill supports; said wear plates including horizontal body portions on each side of the fixed sill upon which the sliding sill rides moving back and forth relative to said fixed sill; each wear plate including means for engaging the inner and outer ends of its respective sliding sill support; said wear plates being made of resilient material having a low coefficient of friction with steel; and good strength in compression to withstand the longitudinal movement of the sliding sill.
Claim 3
Dependent Claim
33 words
A low friction sliding sill support assembly according to claim 1, wherein said engagement means comprise "U" shaped end portions which wrap around said inner and outer ends of said sliding sill supports.
Claim 4
Dependent Claim
34 words
A low friction sliding sill support assembly according to claim 1, wherein said engagement means comprise downward turned flanged end portions which extend below said inner and outer ends of said sliding sill support.
Claim 5
Dependent Claim
31 words
A low friction sliding sill support assembly according to claim 1, wherein fastener openings are provided in said sliding sill supports to attach said sliding sill supports to said vertical supports.
Claim 6
Dependent Claim
31 words
A low friction sliding sill support assembly according to claim 1, wherein said sliding sill supports are angle shaped with said wear plates engaging respectively the upper leg of the angle.
Claim 7
Dependent Claim
21 words
A low friction sliding sill support assembly according to claim 1, wherein a transverse support joins said sliding sill supports together.
Claim 8
Dependent Claim
31 words
A low friction sliding sill support assembly according to claim 6, wherein said transverse support comprises a Z section which is rigidly attached on both ends to said sliding sill supports.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-13 | 1986-03-15 | 1986-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-13 | 1990-03-15 | 1990-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-13 | 1994-03-15 | 1994-09-14 | $7700.00 | Window Closed / Lapsed |