Patent US3944296A successfully refreshed from Google Patents.
US3944296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Track pad for asphalt paving machine
Assignee: TUFF Manufacturing CO Inc
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Filing: 1975-03-12
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Granted: 1976-03-16
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Expires: 1995-03-12
Abstract
Abstract A track pad for the support and propulsion of track propelled vehicles (e.g. asphalt paving machines) comprising a support plate having a longitudinal axis which is greater than its transverse axis, a coating of heavy duty polymer (e.g. a thermoplastic urethane elastomer resin) which substantially encapsulates the support plate, and a means for securing the track pad to the track. The support plate is provided with suitable openings to accommodate the positioning therethrough of a securing means (e.g. flat head carriage bolts), said securing means for removably attaching the track pad to the track. The track pad of this invention is manufactured by pre-assembly of the securing means and the support plate whereafter the pad material is injection molded such as to substantially encapsulate the support plate.
Inventors
- 👤 Peter A. Stampone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:27
CPC Classifications
B; B62; B62D; B62D55/00; B62D55/08; B62D55/18; B62D55/26; B62D55/28
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
204 words
A method for manufacturing a track pad for a tracked vehicles said track pad having a generally planar rectangular base plate with a plurality of openings, a securing means extending through at least one of said plurality of openings for removably attaching the track pad to a track of said tracked vehicles and a pad means of polymer substantially totally encapsulating said base plate but which includes at least one openings to permit the extension therethrough of a portion of said securing means, comprising: positioning said securing means in said support plate to form a sub-assembly positioning said sub-assembly within a die wherein said securing means extend from the die cavity and as such, avoids encapsulation by said polymer; securing said sub-assembly within said die by means of a plurality of positioning projections which extend from said inner surface of said die into said die cavity making surface to surface contact with said base plate injecting polymer into said die to fill said space between said inner surface of said die and said base plate; maintaining said die in a closed position for sufficient time to permit setting of said polymer material removing said track pad from said die after setting of said polymer.
Claim 2
Independent Claim
204 words
A method for manufacturing a track pad for a tracked vehicles said track pad having a generally planar rectangular base plate with a plurality of openings, a securing means extending through at least one of said plurality of openings for removably attaching the track pad to a track of said tracked vehicles and a pad means of polymer substantially totally encapsulating said base plate but which includes at least one openings to permit the extension therethrough of a portion of said securing means, comprising: positioning said securing means in said support plate to form a sub-assembly positioning said sub-assembly within a die wherein said securing means extend from the die cavity and as such, avoids encapsulation by said polymer; securing said sub-assembly within said die by means of a plurality of positioning projections which extend from said inner surface of said die into said die cavity making surface to surface contact with said base plate injecting polymer into said die to fill said space between said inner surface of said die and said base plate; maintaining said die in a closed position for sufficient time to permit setting of said polymer material removing said track pad from said die after setting of said polymer.
Claim 3
Dependent Claim
112 words
A track pad for tracked vehicles comprising: a generally rectangular base plate, said base plate including first and second generally longitudinally extending edges and first and second generally transversely extending edges wherein each of said first and second longitudinally extending edges is provided with a raised lip formed thereon; securing means mounted on said base plate, said securing means for removably attaching said track pad to a track of a tracked vehicle; and pad means, said pad means comprising a molded polymer member which substantially totally encapsulates said base plate, said pad means including at least one opening to permit the extension therethrough of at least a portion of said securing means.
Claim 4
Dependent Claim
112 words
A track pad for tracked vehicles comprising: a generally rectangular base plate, said base plate including first and second generally longitudinally extending edges and first and second generally transversely extending edges wherein each of said first and second longitudinally extending edges is provided with a raised lip formed thereon; securing means mounted on said base plate, said securing means for removably attaching said track pad to a track of a tracked vehicle; and pad means, said pad means comprising a molded polymer member which substantially totally encapsulates said base plate, said pad means including at least one opening to permit the extension therethrough of at least a portion of said securing means.
Claim 5
Dependent Claim
32 words
A track pad according to claim 2 including a plurality of openings formed in said base plate, and wherein said securing means extends through at least one of said plurality of openings.
Claim 6
Dependent Claim
37 words
A track pad according to claim 2 wherein said base plate includes a first generally planar surface and wherein each said raised lip is formed to cooperate with said first planar surface to define an acute angle.
Claim 7
Dependent Claim
37 words
A track pad according to claim 2 wherein said base plate includes a first generally planar surface and wherein each said raised lip is formed to cooperate with said first planar surface to define an obtuse angle.
Claim 8
Dependent Claim
47 words
A track pad according to claim 5 including a first and second transversely extending raised lip formed on said first and second transversely extending edge of said base plate respectively, each said transversely extending raised lip cooperating with said first planar surface to define an obtuse angle.
Claim 9
Dependent Claim
138 words
A track pad for tracked vehicles comprising: a generally rectangular base plate, said base plate having a first generally planar surface and a second generally planar surface; securing means mounted on said base plate, said securing means for removably attaching said track pad to a track of a tracked vehicle; pad means, said pad means comprising a molded polymer member which substantially totally encapsulates said base plate, said pad means including at least one opening to permit the extension therethrough of at least a portion of said securing means; and reaction means comprising at least one raised surface extending outwardly from said second generally planar surface and disposed substantially adjacent said securing means such that said raised surface contacts the surface of a track shoe to define a reaction surface between said track shoe and said track pad.
Claim 10
Dependent Claim
138 words
A track pad for tracked vehicles comprising: a generally rectangular base plate, said base plate having a first generally planar surface and a second generally planar surface; securing means mounted on said base plate, said securing means for removably attaching said track pad to a track of a tracked vehicle; pad means, said pad means comprising a molded polymer member which substantially totally encapsulates said base plate, said pad means including at least one opening to permit the extension therethrough of at least a portion of said securing means; and reaction means comprising at least one raised surface extending outwardly from said second generally planar surface and disposed substantially adjacent said securing means such that said raised surface contacts the surface of a track shoe to define a reaction surface between said track shoe and said track pad.
Claim 11
Dependent Claim
46 words
A track pad according to claim 7 wherein said base plate includes first and second generally longitudinally extending edges and first and second generally transversely extending edges and wherein each of said first and second longitudinally extending edges is provided with a raised lip formed thereon.
Claim 12
Dependent Claim
24 words
A track pad according to claim 8 wherein said first generally planar surface cooperates with each said raised lip to define an acute angle.
Claim 13
Dependent Claim
24 words
A track pad according to claim 8 wherein said first generally planar surface cooperates with each said raised lip to define an obtuse angle.
Claim 14
Dependent Claim
42 words
A track pad according to claim 10 including first and second raised lips formed on said first and second transversely extending edges of said base plate respectively, each said raised lip cooperating with said first planar surface to define an obtuse angle.
Claim 15
Dependent Claim
47 words
A track pad according to claim 7 wherein said at least one raised surface defining said reaction means extends outwardly of said second generally planar surface such as to cause the surface of said pad means to be coplanar to the outermost surface of said reaction means.
Claim 16
Dependent Claim
22 words
A track pad according to claim 7 wherein each said raised surface is defined by a dimple formed in said base plate.
Claim 17
Dependent Claim
38 words
A track pad according to claim 12 wherein each said raised surface is defined by a dimple formed in said base plate, the outer curvature of each said dimple being tangential to the surface of said pad means.
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) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |