US3765807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dump truck pump
Assignee: TYRONE HYDRAULICS INC US
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Filing: 1971-10-01
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Granted: 1973-10-16
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Expires: 1991-10-01
Abstract
Abstract A dump truck pump is disclosed incorporating a hydraulic gear pump adapted to be controllably connected to the truck engine and further incorporating control valve means including a reciprocable piston type valve assembly working in a bore and provided with a cable type actuating element enclosed within a sheath and having means directly connecting the sheath to the body of the pump which means completely closes the valve bore and thus prevents exposure of the valve and bore to the elements. The other end of the valve bore is also enclosed and protected.
Inventors
- 👤 A Joyce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:13
CPC Classifications
F; F04; F04C; F04C14/00; F04C14/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
Hydraulic equipment comprising a pump body having a pair of cylindrical cavities positioned in joining interrelationship, a pair of intermeshing pump gears in said cavities each gear having a mounting shaft projecting at each end of the gear, bushings on the shaft ends for mounting the shafts and thus the gears in the cavities, the bushings for the shafts at one end of the gears having flatted interengaging surfaces, pump inlet and outlet bores in the pump body positioned at the same side of the cavities, one of said bores being directly connected with the gear cavities, and passage means for connecting the opposite side of the cavities with the other bore, said passage means being formed in part by channels provided in the flatted surfaces of the bushings and in part by a channel provided by cutting away the cusp at the juncture of the cavities at the side thereof opposite to the inlet and outlet bores.
Claim 2
Dependent Claim
158 words
Hydraulic equipment comprising a pump body having a pair of cylindrical cavities positioned in joining interrelationship, a pair of intermeshing pump gears in said cavities each gear having a mounting shaft projecting at each end of the gear, bushings on the shaft ends for mounting the shafts and thus the gears in the cavities, the bushings for the shafts at one end of the gears having flatted interengaging surfaces, pump inlet and outlet bores in the pump body positioned at the same side of the cavities, one of said bores being directly connected with the gear cavities, and passage means for connecting the opposite side of the cavities with the other bore, said passage means being formed in part by channels provided in the flatted surfaces of the bushings and in part by a channel provided by cutting away the cusp at the juncture of the cavities at the side thereof opposite to the inlet and outlet bores.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |