US4440088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fabric insertion system
Assignee: Acrowood Corp
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Filing: 1979-10-11
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Granted: 1984-04-03
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Expires: 1999-10-11
Abstract
Abstract A fabric insertion system for placing fabric in the rock ballast roadbed of an existing railroad track at a predetermined depth beneath the ties of the track includes a car for supporting a roll of fabric which is to be inserted into the ballast. A fabric insertion sled is secured to the car in position beneath the car in the ballast at a predetermined depth beneath the ties. The sled receives fabric from the car and the fabric is diverted within the sled such that it emerges therefrom at the depth of the sled. Fabric is continuously inserted into the ballast as the car and sled are moved along the track.
Inventors
- 👤 John A. Wallace
- 👤 Bernard R. Bader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:02
CPC Classifications
E; E01; E01B; E01B27/00; E01B27/02; E01B27/023; E01B27/026; E01B27/021; E01B2203/00; E01B2203/01; E01B2203/015; E01B2203/02; E01B2203/024; E01B2203/04; E01B2203/047; E01B2204/00; E01B2204/03
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
144 words
A fabric insertion system for placing fabric in the rock ballast road bed of a railroad track at a predetermined depth in said ballast, comprising: a car for supporting fabric to be inserted into the ballast, and a fabric insertion sled secured to said car and positionable beneath said car in said ballast at said predetermined depth, said sled having a fabric inlet opening to one side thereof and a fabric outlet opening which extends across the upper surface of said sled at an angle of approximately 45° with respect to the direction of movement of said sled through said ballast, said sled receiving the fabric through said inlet opening such that said fabric emerges from said sled through said outlet opening and slides across said upper surface of said sled passing rearwardly from said outlet opening, and is positioned at said predetermined depth.
Claim 2
Dependent Claim
144 words
A fabric insertion system for placing fabric in the rock ballast road bed of a railroad track at a predetermined depth in said ballast, comprising: a car for supporting fabric to be inserted into the ballast, and a fabric insertion sled secured to said car and positionable beneath said car in said ballast at said predetermined depth, said sled having a fabric inlet opening to one side thereof and a fabric outlet opening which extends across the upper surface of said sled at an angle of approximately 45° with respect to the direction of movement of said sled through said ballast, said sled receiving the fabric through said inlet opening such that said fabric emerges from said sled through said outlet opening and slides across said upper surface of said sled passing rearwardly from said outlet opening, and is positioned at said predetermined depth.
Claim 3
Dependent Claim
48 words
The fabric insertion system of claim 1, further comprising means for moving said car and said sled aLong said track as said fabric is fed into said inlet opening, whereby said fabric emerges from said fabric outlet opening and is inserted into said ballast at said predetermined depth.
Claim 4
Dependent Claim
21 words
The fabric insertion system of claim 1 in which said sled further comprises means for diverting the fabric within said sled.
Claim 5
Dependent Claim
33 words
Ihe fabric insertion system of claim 1 in which said sled further comprises a cover extending across said sled above said fabric outlet opening for preventing ballast from entering said fabric outlet opening.
Claim 6
Dependent Claim
31 words
The fabric insertion system of claim 1 in which said sled further comprises an upwardly extending chute defining said fabric inlet opening, said chute extending along one side of said sled.
Claim 7
Dependent Claim
27 words
A fabric insertion system of claim 1 in which the forward edge of said sled is serrated, whereby movement of the sled through the ballast is facilitated.
Claim 8
Dependent Claim
57 words
A fabric insertion system of claim 1 further comprising hydraulic mounting means, extending between said sled and said car, for securing said sled to said car, said mounting means being hydraulically controllable, whereby the depth of said sled in said ballast may be controlled and the depth at which said fabric is inserted into said ballast determined.
Claim 9
Dependent Claim
36 words
The fabric insertion system of claim 1 further comprising means on said car for contouring soil adjacent said roadbed to permit said fabric insertion sled to be inserted laterally into said ballast at the desired depth.
Claim 10
Dependent Claim
35 words
The fabric insertion system of claim 8 further comprising extensible support means on said car for engaging the soil adjacent said roadbed during insertion of said sled into said ballast, whereby said car is stabilized.
Claim 11
Dependent Claim
34 words
The fabric insertion system of claim 9 further comprising means for engaging and raising said track during insertion of said sled into said ballast, whereby insertion of said sled into said ballast is facilitated.
Claim 12
Dependent Claim
34 words
The fabric insertion system of claim 1 further comprising ballast contouring means on said car rearward of said sled for contouring said ballast after said fabric is inserted into said ballast through said sled.
References Cited (Backward Citations)
BE550745A
Cited
US1471760A
Cited
US1918348A
Cited
US2420833A
Cited
US2575390A
Cited
US2921390A
Cited
US2769172A
Cited
US2921538A
Cited
US2921537A
Cited
US3368729A
Cited
US3179062A
Cited
AT307476B
Cited
US3621785A
Cited
CH550282A
Cited
US3967396A
Cited
US4064807A
Cited
DE2647159A1
Cited
US4397241A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-03 | 1987-10-03 | 1988-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-03 | 1991-10-03 | 1992-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-03 | 1995-10-03 | 1996-04-03 | $7700.00 | Window Closed / Lapsed |