US3929400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slurry pumps
Assignee: Winget Ltd
•
Filing: 1973-08-09
•
Granted: 1975-12-30
•
Expires: 1993-08-09
Abstract
Abstract Slurry pump, particularly for wet concrete, in which a discharge pipe extends upwardly from the base of a supply hopper and is rotatable through a restricted arc about the vertical axis. The discharge pipe is provided, at the bottom of the hopper, with a horizontal elbow registering alternatively with two pump cylinders extending horizontally from the hopper. During induction a pump cylinder ingests slurry from the hopper and during discharge, discharges slurry to the discharge pipe through the elbow, the discharge pipe being oscillated to connect with the appropriate cylinder.
Inventors
- 👤 Harry Merton
- 👤 Thomas Michael Howlitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:15
CPC Classifications
F; F04; F04B; F04B15/00; F04B15/02; F04B15/023; F04B7/00; F04B7/0019; F04B7/0034; Y; Y10; Y10S; Y10S417/00; Y10S417/90
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
346 words
A slurry pump having a framework, fixedly mounted on the framework first and second pump cylinders, hingedly mounted on the framework a slurry hopper readily separable from the pump cylinders by rotation about an upright hinge mounting from a normal position in which the pump cylinders communicate with the interior of the slurry hopper, pistons in the respective first and second pump cylinder, each piston provided with drive means adapted to move the piston between a position adjacent the slurry hopper to a position remote from the slurry hopper by way of an induction stroke and from a position remote from the slurry hopper to a position adjacent the slurry hopper by way of a discharge stroke, extending into the slurry hopper an upright, hollow, slurry discharge column, extending horizontally from the upright, hollow, slurry discharge column and in communication therewith a radial duct formed at an end portion remote from the upright, hollow, slurry discharge column with a cylindrical end wall face co-axial with the upright, hollow, slurry discharge column axis, means adapted to rotate the upright, hollow slurry discharge column and the radial duct through a restricted arc about the upright, hollow, slurry discharge column axis between a first position and a second position, a cylindrical wall portion of the slurry hopper co-axial with the upright, hollow, slurry discharge column penetrated by the first and second passages respectively in register with the radial duct in the first position connecting with the first pump cylinder and with the radial duct in the second position connecting with the second pump cylinder, the cylindrical wall portion being formed of abrasion resistant material and being readily removable upon rotating the slurry hopper about the upright hinge to separate the slurry hopper from the cylinders, and means interconnecting the drive means for each piston and the means adapted to rotate the hollow column such that the induction stroke is made with the respective pump cylinder in communication with the slurry hopper interior and the discharge stroke is made with the respective pump cylinder in communication with the radial duct.
Claim 2
Dependent Claim
346 words
A slurry pump having a framework, fixedly mounted on the framework first and second pump cylinders, hingedly mounted on the framework a slurry hopper readily separable from the pump cylinders by rotation about an upright hinge mounting from a normal position in which the pump cylinders communicate with the interior of the slurry hopper, pistons in the respective first and second pump cylinder, each piston provided with drive means adapted to move the piston between a position adjacent the slurry hopper to a position remote from the slurry hopper by way of an induction stroke and from a position remote from the slurry hopper to a position adjacent the slurry hopper by way of a discharge stroke, extending into the slurry hopper an upright, hollow, slurry discharge column, extending horizontally from the upright, hollow, slurry discharge column and in communication therewith a radial duct formed at an end portion remote from the upright, hollow, slurry discharge column with a cylindrical end wall face co-axial with the upright, hollow, slurry discharge column axis, means adapted to rotate the upright, hollow slurry discharge column and the radial duct through a restricted arc about the upright, hollow, slurry discharge column axis between a first position and a second position, a cylindrical wall portion of the slurry hopper co-axial with the upright, hollow, slurry discharge column penetrated by the first and second passages respectively in register with the radial duct in the first position connecting with the first pump cylinder and with the radial duct in the second position connecting with the second pump cylinder, the cylindrical wall portion being formed of abrasion resistant material and being readily removable upon rotating the slurry hopper about the upright hinge to separate the slurry hopper from the cylinders, and means interconnecting the drive means for each piston and the means adapted to rotate the hollow column such that the induction stroke is made with the respective pump cylinder in communication with the slurry hopper interior and the discharge stroke is made with the respective pump cylinder in communication with the radial duct.
Claim 3
Dependent Claim
46 words
A slurry pump as claimed in claim 1, wherein the radial duct is provided with an end sleeve of abrasion resistant material readily removably mounted on the radial duct upon rotating the slurry hopper about the upright hinge to separate the slurry hopper from the cylinders.
Claim 4
Dependent Claim
52 words
A slurry pump as claimed in claim 2, wherein the upright, hollow, slurry discharge column is supported in an upper bearing mounted adjacent the top of the slurry hopper and a lower extension of the hollow column extends through the slurry hopper base and is suppported in a bearing subjacent the base.
Claim 5
Dependent Claim
45 words
A slurry pump as claimed in claim 3, wherein a drive shaft extending across the slurry hopper is provided with blades adapted to effect agitation of the slurry and urge the slurry tangentially from the blades horizontally toward the passages in the cylindrical wall portion.
Claim 6
Dependent Claim
35 words
A slurry pump as claimed in claim 4, wherein vanes are provided on the radial duct and on the upright, hollow, slurry discharge column to effect agitation of the slurry upon reciprocation of the column.
References Cited (Backward Citations)
US2957430A
Cited
US3181469A
Cited
US3298322A
Cited
US3465685A
Cited
US3647325A
Cited
US3588294A
Cited
US3647326A
Cited
US3682575A
Cited
US3726614A
Cited
US3832097A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |