US3734654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary roller pumps
Assignee: TSC Industries Inc
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Filing: 1971-03-29
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Granted: 1973-05-22
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Expires: 1991-03-29
Abstract
Abstract A rotary roller pump comprising a cylindrical pump chamber closed at both ends and having inlet and outlet openings into the chamber, a rotor eccentrically mounted in the pump chamber on a cantilever shaft, and a plurality of rollers located in longitudinal slots in the periphery of the rotor; the entire rotor is of molded plastic, keyed to the shaft. The periphery of the rotor, between roller slots, comprises a series of voids with central reinforcing ribs; apertures through the ribs equalize pressures on opposite sides of the rotor.
Inventors
- 👤 T Burenga
- 👤 E Elliott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:28
CPC Classifications
F; F01; F01C; F01C21/00; F01C21/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
204 words
A rotor assembly for a rotary roller liquid pump, of the kind comprising a housing defining a cylindrical pump chamber closed at both ends and having an inlet opening through said housing into said pump chamber, an outlet opening through said housing into said pump chamber, and at least one shaft-receiving opening extending through one end of said housing, said rotor assembly comprising: a rotor shaft projecting through said shaft-receiving opening and across said pump chamber; a rotor of molded plastic material affixed to said shaft and spanning said pump chamber from end to end, the periphery of said rotor having a plurality of longitudinal roller-receiving slots molded therein; the periphery of said rotor having a corresponding plurality of voids formed thereon, in the segments of the rotor intermediate said roller-receiving slots, each void extending from a fulldiameter wall at one roller slot to a full-diameter wall at the next adjacent roller slot; said rotor further comprising a corresponding plurality of arcuate reinforcing ribs, each spanning a medial portion of one of said voids to brace the walls thereof; and a corresponding plurality of rollers each mounted in one of said slots and extending from one end of said pump chamber to the other.
Claim 2
Dependent Claim
204 words
A rotor assembly for a rotary roller liquid pump, of the kind comprising a housing defining a cylindrical pump chamber closed at both ends and having an inlet opening through said housing into said pump chamber, an outlet opening through said housing into said pump chamber, and at least one shaft-receiving opening extending through one end of said housing, said rotor assembly comprising: a rotor shaft projecting through said shaft-receiving opening and across said pump chamber; a rotor of molded plastic material affixed to said shaft and spanning said pump chamber from end to end, the periphery of said rotor having a plurality of longitudinal roller-receiving slots molded therein; the periphery of said rotor having a corresponding plurality of voids formed thereon, in the segments of the rotor intermediate said roller-receiving slots, each void extending from a fulldiameter wall at one roller slot to a full-diameter wall at the next adjacent roller slot; said rotor further comprising a corresponding plurality of arcuate reinforcing ribs, each spanning a medial portion of one of said voids to brace the walls thereof; and a corresponding plurality of rollers each mounted in one of said slots and extending from one end of said pump chamber to the other.
Claim 3
Dependent Claim
81 words
A rotor assembly for a rotary roller pump according to claim 1, in which said shaft includes a plurality of integral interlock elements and in which said rotor is molded in situ on said shaft, in complementary configuration with said interlock elements, said interlock elements each comprising both a recess in said shaft and a projection from said shaft, affording a positive rotary driving connection between said rotor and said shaft and preventing axial displacement of said rotor along said shaft.
Claim 4
Dependent Claim
37 words
A rotor assembly for a rotary roller pump according to claim 1, in which each said reinforcing rib has an aperture through the base of the rib to equalize pressure on the opposite sides of the rib.
Claim 5
Dependent Claim
46 words
A rotor assembly for a rotary roller pump according to claim 1, in which said rotor is formed of a plastic material selected from the group consisting of thermoplastic acetal resin and plasticized ethyl cellulose, and in which the plastic material is filled with glass fiber.
Claim 6
Dependent Claim
31 words
A rotor assembly for a rotary roller pump according to claim 1, in which said rotor is molded in situ on said shaft and is formed of glass-filled plasticized ethyl cellulose.
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) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |