US3707927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resilient truck side bearings
Assignee: Standard Car Truck Co
•
Filing: 1970-09-28
•
Granted: 1973-01-02
•
Expires: 1990-09-28
Abstract
Abstract A side bearing for railroad car trucks having elements in constant contact and compressible at variable rates as the railroad car and truck side move relatively toward each other.
Inventors
- 👤 R Geyer
- 👤 R Gierlach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:46
CPC Classifications
B; B61; B61F; B61F5/00; B61F5/02; B61F5/14; B61F5/142
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
94 words
A railroad truck side bearing assembly including a housing having an open end, a variable, elastomeric compression member within said housing, a bearing plate member urged by said compression member into a position outwardly of said open end and movable inwardly of said housing against the resistance of said compression member, a ring member formed of elastomeric material and secured to said bearing plate member and said housing and extending therebetween, said ring member sealing the space between said bearing plate member and said housing and closing said housing against ingress of deleterious material.
Claim 2
Dependent Claim
94 words
A railroad truck side bearing assembly including a housing having an open end, a variable, elastomeric compression member within said housing, a bearing plate member urged by said compression member into a position outwardly of said open end and movable inwardly of said housing against the resistance of said compression member, a ring member formed of elastomeric material and secured to said bearing plate member and said housing and extending therebetween, said ring member sealing the space between said bearing plate member and said housing and closing said housing against ingress of deleterious material.
Claim 3
Dependent Claim
59 words
The structure of claim 1, wherein said ring is secured to said bearing plate member and said housing substantially in parallel with the plane occupied by said bearing plate member at a point intermediate its excursion, whereby said ring is placed in tension when said bearing plate member is positioned outwardly of said housing and inwardly of said housing.
Claim 4
Dependent Claim
65 words
The structure of claim 1, wherein said compression member includes a first portion formed of a plurality of rigid plates and alternating layers of elastic material having a first rate of resistance to compression and a block of elastic material positioned between said first portion and said bearing plate, said block having a rate of resistance to compression less than that of said first portion.
Claim 5
Dependent Claim
66 words
The structure of claim 1, wherein said compression member includes a first portion having a first rate of resistance to compression and a second portion having a lesser rate of resistance to compression, said second portion being Positioned between said first portion and said bearing plate, said bearing plate having a depending segment positioned to contact said first portion when said second portion has been compressed.
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) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |