US3771831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pavement cutting machine-cutter bearing assembly
Assignee: BURGELMAN ASSOCIATES BV AMSTERDAM A NETHERLANDS CORP
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Filing: 1972-07-31
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Granted: 1973-11-13
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Expires: 1992-07-31
Abstract
Abstract Pavement cutting machine having an improved cutter assembly wherein two rotary cutters are arranged end to end. Each cutter has a shaft with bearings at each end of the shaft, the bearings being supported by floating beams each operated by a hydraulic cylinder in order to force the cutter to the work or lift it. The outer end of each shaft has a pulley for a belt connected to an engine to rotate the cutter. The bearing at the outer end of the shaft and adjacent to the drive pulley is a non-expansion selfaligning type bearing arranged to tilt on a fixed axis or point while the bearing at the inner end of the shaft is an expansion self-aligning type bearing to permit horizontal movement of the bearing to thereby relieve stress on the bearings when the cutter shaft is tilted. The floating beams are arranged to pivot on a horizontal axis.
Inventors
- 👤 G Warner
- 👤 C Hatcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:53
CPC Classifications
E; E01; E01C; E01C23/00; E01C23/06; E01C23/08; E01C23/085; E01C23/088; E01C2301/00; E01C2301/50
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
198 words
Cutter assembly comprising a rotary cutter having a shaft, a first support having a first bearing for a first end of said Shaft, a second support having a second bearing for a second end of said shaft, means supporting said first and second supports for pivotal movement on a horizontal axis, a drive pulley on a first end of said shaft adjacent said first bearing, means for operating said drive pulley, and separate and independent means for operating said supports, the improvement wherein said first bearing has a housing body having an internal spherical surface, said body having an inner race and an outer race confining a set of rollers, the outer surface of said outer race having a spherical surface mating with the internal spherical surface of said housing body, said races tilting for self-alignment about a fixed point which is the center of said spherical surfaces, said second bearing having a housing body having an internal cylindrical surface housing a roller bearing for said shaft, said roller bearing having an external spherical surface supported for longitudinal movement and tilt movement by said cylindrical surface for expansion of said second bearing with respect to said first bearing.
Claim 2
Dependent Claim
198 words
Cutter assembly comprising a rotary cutter having a shaft, a first support having a first bearing for a first end of said Shaft, a second support having a second bearing for a second end of said shaft, means supporting said first and second supports for pivotal movement on a horizontal axis, a drive pulley on a first end of said shaft adjacent said first bearing, means for operating said drive pulley, and separate and independent means for operating said supports, the improvement wherein said first bearing has a housing body having an internal spherical surface, said body having an inner race and an outer race confining a set of rollers, the outer surface of said outer race having a spherical surface mating with the internal spherical surface of said housing body, said races tilting for self-alignment about a fixed point which is the center of said spherical surfaces, said second bearing having a housing body having an internal cylindrical surface housing a roller bearing for said shaft, said roller bearing having an external spherical surface supported for longitudinal movement and tilt movement by said cylindrical surface for expansion of said second bearing with respect to said first bearing.
Claim 3
Dependent Claim
205 words
In a cutter assembly having a U-frame having opposite sides and a pair of floating beams intermediate said sides, separate means supporting the outer ends of said sides and said beams for pivotal movement on a transverse horizontal axis and on a longitudinal axis, a rotary cutter having a first shaft, bearings supporting opposite ends of said shaft in one side of said U-frame and one of said floating beams, another rotary cutter having a second shaft, bearings supporting opposite ends of said second shaft in the other said beams and in the other side of said U-frame, a pulley on each of said shafts adjacent to a side of said U-frame, and means for operating said drive pulleys, fluid pressure operated means operating said frame and each of said beams, the improvement wherein the bearing in each side of said U-frame has parts with mating spherical surfaces relatively movable on a fixed center, and wherein each bearing in one of said beams has a housing body having an internal cylindrical surface housing a roller bearing for said shaft, each said roller bearing having an external spherical surface and each roller bearing being supported for longitudinal movement and tilt movement by its said cylindrical surface.
Claim 4
Dependent Claim
205 words
In a cutter assembly having a U-frame having opposite sides and a pair of floating beams intermediate said sides, separate means supporting the outer ends of said sides and said beams for pivotal movement on a transverse horizontal axis and on a longitudinal axis, a rotary cutter having a first shaft, bearings supporting opposite ends of said shaft in one side of said U-frame and one of said floating beams, another rotary cutter having a second shaft, bearings supporting opposite ends of said second shaft in the other said beams and in the other side of said U-frame, a pulley on each of said shafts adjacent to a side of said U-frame, and means for operating said drive pulleys, fluid pressure operated means operating said frame and each of said beams, the improvement wherein the bearing in each side of said U-frame has parts with mating spherical surfaces relatively movable on a fixed center, and wherein each bearing in one of said beams has a housing body having an internal cylindrical surface housing a roller bearing for said shaft, each said roller bearing having an external spherical surface and each roller bearing being supported for longitudinal movement and tilt movement by its said cylindrical surface.
Claim 5
Dependent Claim
136 words
Cutter assembly comprising a rotary cutter having a shaft, a bearing at each end of said shaft, means for rotating said shaft, a movable support for each of said bearings, separate fluid pressure operated means for operating each of said supports to hold said cutter in active position on a pavement, said cutter tilting out of true horizontal position to fit the contour of the pavement, and one of said bearings having members having a slidable coupling to relieve the stress between said bearings when the distance between said bearings increases as said shaft assumes a tilt position, said one bearing having a housing body having an internal cylindrical surface housing a roller bearing for said shaft, said roller bearing having an external spherical surface supported for longitudinal movement and tilt movement by said cylindrical surface.
Claim 6
Dependent Claim
136 words
Cutter assembly comprising a rotary cutter having a shaft, a bearing at each end of said shaft, means for rotating said shaft, a movable support for each of said bearings, separate fluid pressure operated means for operating each of said supports to hold said cutter in active position on a pavement, said cutter tilting out of true horizontal position to fit the contour of the pavement, and one of said bearings having members having a slidable coupling to relieve the stress between said bearings when the distance between said bearings increases as said shaft assumes a tilt position, said one bearing having a housing body having an internal cylindrical surface housing a roller bearing for said shaft, said roller bearing having an external spherical surface supported for longitudinal movement and tilt movement by said cylindrical surface.
References Cited (Backward Citations)
US3269775A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |