US3700288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paving machine
Assignee: BLAW-KNOX CONSTRUCTION Corp
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Filing: 1969-12-31
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Granted: 1972-10-24
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Expires: 1989-12-31
Abstract
Abstract An asphalt paving machine mounted on rubber tread tracks. Each track is equally tensioned hydraulically. Each track is made of shoes which are individually connected to band sections. Replaceable rubber inserts are fastened to each shoe. Replaceable retains connected to each shoe engage bogie wheels which are attached to bogie carriages pivotally mounted on a torsionally flexible machine frame. A drive sprocket for each track is directly driven by a separate hydrostatic transmission with the sprocket supporting the track shoes and bands to maintain a constant pitch diameter for the track. The gear train between the hydrostatic motor and the sprocket is completely enclosed. A manual automatic engine speed control system is provided which automatically brings the paving machine engine to idle speed when the paving machine is stopped and brings the engine to its governed speed whenever the paving machine is moved. A closed center hydraulic system supplies fluid to operate power actuators.
Inventors
- 👤 Donald R Davin
- 👤 Gary H Beckley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:35
CPC Classifications
B; B62; B62D; B62D55/00; B62D55/08; B62D55/18; B62D55/20; B62D55/10; B62D55/104; B62D55/116; B62D55/14; B62D55/24; E; E01; E01C; E01C19/00; E01C19/22; E01C19/30; E01C19/34; E01C19/40; E01C19/405
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
142 words
In a ground engaging track for a vehicle, with said track having a pair of laterally-spaced, longitudinally-extending bands disposed parallel to each other, the combination which comprises a plurality of ground engaging shoes spaced-apart longitudinally of said track and connected to both bands thereof, each of said shoes having a pair of recessed portions for receiving ground engaging inserts on the side thereof opposite said bands and extending substantially over the entire transverse extent of said track, each of said shoes having a centrally disposed opening at a point midway between each side of said track for receiving a driving force therefore, and in which the ground engaging surface of said shoes is comprised of a ground engaging insert disposed in each of said recessed portions with each of said inserts extending from one side edge of said tract to said opening.
Claim 2
Dependent Claim
142 words
In a ground engaging track for a vehicle, with said track having a pair of laterally-spaced, longitudinally-extending bands disposed parallel to each other, the combination which comprises a plurality of ground engaging shoes spaced-apart longitudinally of said track and connected to both bands thereof, each of said shoes having a pair of recessed portions for receiving ground engaging inserts on the side thereof opposite said bands and extending substantially over the entire transverse extent of said track, each of said shoes having a centrally disposed opening at a point midway between each side of said track for receiving a driving force therefore, and in which the ground engaging surface of said shoes is comprised of a ground engaging insert disposed in each of said recessed portions with each of said inserts extending from one side edge of said tract to said opening.
Claim 3
Dependent Claim
55 words
Apparatus as recited in claim 1, in which each of said inserts is comprised of a steel plate with a resilient pad molded thereon, and including a plurality of bolts affixed to said plate and extending through said shoes and said bands for holding said shoes and said inserts in place along said dual track.
Claim 4
Dependent Claim
54 words
Apparatus as recited in claim 1, in which each of said inserts is comprised of a steel plate with a resilient pad molded thereon, and includIng a plurality of bolts affixed to said plate and extending through said shoes and said bands for holding said shoes and said inserts in place along said track.
Claim 5
Dependent Claim
130 words
In a track for a ground engaging vehicle having longitudinally extending bands formed of a plurality of spaced-apart steel cables extending lengthwise in each band, and said cables being embedded in resilient materials; and a plurality of ground engaging shoes spaced-apart longitudinally of said track; the combination which comprises plurality of track retainers disposed at the intersection of each of said shoes with said bands, and disposed on the side of said bands limiting compression forces on said bands between said shoes and said retainers; each of said shoes having a resilient pad insert with said insert including a steel plate with a resilient pad molded thereon; and a plurality of bolts affixed to said plates and extending through said shoes, said bands and said retainers preventing relative movement therebetween.
Claim 6
Dependent Claim
130 words
In a track for a ground engaging vehicle having longitudinally extending bands formed of a plurality of spaced-apart steel cables extending lengthwise in each band, and said cables being embedded in resilient materials; and a plurality of ground engaging shoes spaced-apart longitudinally of said track; the combination which comprises plurality of track retainers disposed at the intersection of each of said shoes with said bands, and disposed on the side of said bands limiting compression forces on said bands between said shoes and said retainers; each of said shoes having a resilient pad insert with said insert including a steel plate with a resilient pad molded thereon; and a plurality of bolts affixed to said plates and extending through said shoes, said bands and said retainers preventing relative movement therebetween.
Claim 7
Dependent Claim
44 words
Apparatus as recited in claim 4, in which said limiting means includes a pair of spaced-apart abutments extending from said shoes around opposed sides of said bands forming a band retaining space therebetween, the ends of said abutments forming surfaces for engaging said retainers.
Claim 8
Dependent Claim
47 words
Apparatus as recited in claim 5, which includes a ground engaging vehicle having a plurality of track engaging wheels thereon, an opening disposed in each of said shoes, and a drive sprocket mounted on said paving machine with teeth for engaging the said openings in said shoes
Claim 9
Dependent Claim
29 words
Apparatus as recited in claim 6, in which each of said retainers has lateral load engaging means thereon for engaging the sides of said plurality of track engaging wheels.
Claim 10
Dependent Claim
73 words
Apparatus as recited in claim 7, in which said lateral engaging means includes a bracket disposed on each of said retainers, said bracket being disposed in a plane so that the wheel engaging surface thereof is at an angle greater than 90* from the axis of said engaged wheels, and further includes an extension thereon for cooperation with one of said spaced-apart shoe abutments to transfer said lateral loads directly to said shoes.
Claim 11
Dependent Claim
35 words
The apparatus of claim 4, further characterized in that said sprocket is formed with at least one rim means adapted to engage and support said metal shoe when said sprocket tooth meshes with said opening.
Claim 12
Dependent Claim
27 words
The apparatus of claim 9, further characterized in that said rim means is segmented with each segment of said rim aligned with a tooth of said sprocket.
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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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |