Patent US3717045A successfully refreshed from Google Patents.
US3717045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tractor power take-off drive for centrifugal pump
Assignee: TSC Industries Inc
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Filing: 1971-10-12
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Granted: 1973-02-20
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Expires: 1991-10-12
Abstract
Abstract A centrifugal pump assembly driven from the power take-off shaft of a farm tractor, comprising a drive roller affixed to the pump shaft externally of the pump housing, a power take-off coupling connected to the tractor PTO shaft and having a drive shaft projecting outwardly of the coupling with the end of the drive shaft mounted in a drive shaft support. The drive shaft support is affixed to the pump housing, so that the drive shaft is maintained in parallel spaced relation to the pump shaft. A small rubber tire, supported by the drive shaft and driven from the PTO coupling, engages the drive roller to drive the centrifugal pump; the tire diameter is at least three times the diameter of the drive roller to afford a high speed pump drive.
Inventors
- 👤 T Burenga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:52
CPC Classifications
F; F16; F16H; F16H13/00; F16H13/02; F04; F04D; F04D13/00; F04D13/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
180 words
A tractor-driven centrifugal pump assembly, for connection to the power take-off shaft of a tractor, comprising: a centrifugal pump including a pump housing, a rotary impeller mounted within the housing, and a pump shaft connected to the impeller and projecting outwardly of the pump housing; a drive roller of given diameter mounted on the pump shaft externally of the pump housing; a power take-off coupling adapted for connection to the power take-off shaft of a tractor; a drive shaft extending axially of and supporting one end of said power take-off coupling; a drive shaft support, affixed to said pump housing, affording a support for the drive shaft, maintaining the drive shaft and the PTO coupling in predetermined parallel spaced relation to said pump shaft; and a resilient tire mounted on the PTO coupling with the tread of the tire engaging said drive roller, the ratio of diameters of said tire and said drive roller being at least 3:1 for driving the pump shaft at a speed greater than the rotational speed of the PTO coupling in accordance with said ratio.
Claim 2
Dependent Claim
180 words
A tractor-driven centrifugal pump assembly, for connection to the power take-off shaft of a tractor, comprising: a centrifugal pump including a pump housing, a rotary impeller mounted within the housing, and a pump shaft connected to the impeller and projecting outwardly of the pump housing; a drive roller of given diameter mounted on the pump shaft externally of the pump housing; a power take-off coupling adapted for connection to the power take-off shaft of a tractor; a drive shaft extending axially of and supporting one end of said power take-off coupling; a drive shaft support, affixed to said pump housing, affording a support for the drive shaft, maintaining the drive shaft and the PTO coupling in predetermined parallel spaced relation to said pump shaft; and a resilient tire mounted on the PTO coupling with the tread of the tire engaging said drive roller, the ratio of diameters of said tire and said drive roller being at least 3:1 for driving the pump shaft at a speed greater than the rotational speed of the PTO coupling in accordance with said ratio.
Claim 3
Dependent Claim
180 words
A tractor-driven centrifugal pump assembly, for connection to the power take-off shaft of a tractor, comprising: a centrifugal pump including a pump housing, a rotary impeller mounted within the housing, and a pump shaft connected to the impeller and projecting outwardly of the pump housing; a drive roller of given diameter mounted on the pump shaft externally of the pump housing; a power take-off coupling adapted for connection to the power take-off shaft of a tractor; a drive shaft extending axially of and supporting one end of said power take-off coupling; a drive shaft support, affixed to said pump housing, affording a support for the drive shaft, maintaining the drive shaft and the PTO coupling in predetermined parallel spaced relation to said pump shaft; and a resilient tire mounted on the PTO coupling with the tread of the tire engaging said drive roller, the ratio of diameters of said tire and said drive roller being at least 3:1 for driving the pump shaft at a speed greater than the rotational speed of the PTO coupling in accordance with said ratio.
Claim 4
Dependent Claim
180 words
A tractor-driven centrifugal pump assembly, for connection to the power take-off shaft of a tractor, comprising: a centrifugal pump including a pump housing, a rotary impeller mounted within the housing, and a pump shaft connected to the impeller and projecting outwardly of the pump housing; a drive roller of given diameter mounted on the pump shaft externally of the pump housing; a power take-off coupling adapted for connection to the power take-off shaft of a tractor; a drive shaft extending axially of and supporting one end of said power take-off coupling; a drive shaft support, affixed to said pump housing, affording a support for the drive shaft, maintaining the drive shaft and the PTO coupling in predetermined parallel spaced relation to said pump shaft; and a resilient tire mounted on the PTO coupling with the tread of the tire engaging said drive roller, the ratio of diameters of said tire and said drive roller being at least 3:1 for driving the pump shaft at a speed greater than the rotational speed of the PTO coupling in accordance with said ratio.
Claim 5
Dependent Claim
54 words
A tractor-driven centrifugal pump assembly, according to claim 1, in which said tire is a rubber tire having an unstressed radius somewhat larger than the spacing between the drive shaft axis and the periphery of the drive roller, to afford a substantial area of frictional engagement between the drive roller and the tire tread.
Claim 6
Dependent Claim
23 words
A tractor-driven centrifugal pump assembly, according to claim 2, in which said tire is a pneumatic rubber tire inflated to a limited pressure.
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) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |