US3726614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump construction
Assignee: Torkret GmbH
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Filing: 1971-07-14
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Granted: 1973-04-10
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Expires: 1991-07-14
Abstract
Abstract A pump for viscous materials has two or more cylinders each of which accommodates a reciprocable piston. A receiving channel is adapted to receive material expelled from the respective cylinders and has an inlet for this purpose. A hopper contains viscous material and communicates via two apertures with the respective cylinders. A substantially S-shaped conduit is located in the hopper and has an outlet opening coaxial and communicating with the inlet, and an inlet opening. A shaft member is fast with the conduit and coaxial with the inlet, the shaft member being mounted for turning movement whereby it effects pivoting of the conduit between two end positions in which the inlet opening of the conduit respectively registers with one of the apertures. The pivoting movement is timed so that the inlet opening of the conduit registers with the aperture of that cylinder in which the piston is about to perform its working stroke.
Inventors
- 👤 W Schellenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:42
CPC Classifications
F; F04; F04B; F04B7/00; F04B7/0019; F04B7/0034; Y; Y10; Y10S; Y10S417/00; Y10S417/90
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
129 words
In a pump for viscous materials, particularly for concrete, in combination, at least two cylinders each accommodating a reciprocable piston; a receiving channel adapted to receive material expelled from the respective cylinders, and having an inlet; a hopper adapted to contain viscous material and communicating via two apertures with the respective cylinders; a curved conduit in said hopper having an outlet opening coaxial and axially registering with said inlet, and an inlet opening; a shaft member fast with said conduit and coaxial with said inlet, said shaft member being journalled for movement in a sense pivoting said conduit between two end positions in each of which said inlet opening registers with one of said apertures; and displacing means for displacing said shaft member in axial direction of the same.
Claim 2
Dependent Claim
129 words
In a pump for viscous materials, particularly for concrete, in combination, at least two cylinders each accommodating a reciprocable piston; a receiving channel adapted to receive material expelled from the respective cylinders, and having an inlet; a hopper adapted to contain viscous material and communicating via two apertures with the respective cylinders; a curved conduit in said hopper having an outlet opening coaxial and axially registering with said inlet, and an inlet opening; a shaft member fast with said conduit and coaxial with said inlet, said shaft member being journalled for movement in a sense pivoting said conduit between two end positions in each of which said inlet opening registers with one of said apertures; and displacing means for displacing said shaft member in axial direction of the same.
Claim 3
Dependent Claim
20 words
In a pump as defined in claim 1; further comprising support means journalling said shaft member for said movement thereof.
Claim 4
Dependent Claim
28 words
In a pump as defined in claim 1; and further comprising coupling means coupling said conduit with said channel for rotatable and axial displacement relative to said inlet.
Claim 5
Dependent Claim
13 words
In a pump as defined in claim 1; said conduit being substantially S-shaped.
Claim 6
Dependent Claim
14 words
In a pump as defined in claim 1, said displacing means comprising nut means.
Claim 7
Dependent Claim
25 words
In a pump as defined in claim 1; and further comprising turning means connected with said shaft for turning the same about the axis thereof.
Claim 8
Dependent Claim
41 words
In a pump as defined in claim 1, said hopper having an open end and a closed end provided with an endwall having said apertures; and wherein the general plane of said inlet opening parallels the general plane of said endwall.
Claim 9
Dependent Claim
17 words
In a pump as defined in claim 7, wherein said general planes extend at least substantially horizontal.
Claim 10
Dependent Claim
159 words
In a pump for viscous materials, particularly for concrete, in combination, at least two cylinders each accommodating a reciprocable piston; a receiving channel adapted to receive material expelled from the respective cylinders, and having an inlet; a hopper adapted to contain viscous material and communicating via two apertures with the respective cylinders; a curved conduit in said hopper having an outlet opening coaxial and axially registering with said inlet, and an inlet opening, said conduit having an annular surface surrounding said inlet opening; a pair of wear rings each releasably surrounding one of said apertures and adapted for sealing engagement with said annular surface in response to registry of said inlet opening with the respective aperture; and a shaft member fast with said conduit and coaxial with said inlet, said shaft member being journalled for movement in a sense pivoting said conduit between two end positions in each of which said inlet opening registers with one of said apertures.
Claim 11
Dependent Claim
159 words
In a pump for viscous materials, particularly for concrete, in combination, at least two cylinders each accommodating a reciprocable piston; a receiving channel adapted to receive material expelled from the respective cylinders, and having an inlet; a hopper adapted to contain viscous material and communicating via two apertures with the respective cylinders; a curved conduit in said hopper having an outlet opening coaxial and axially registering with said inlet, and an inlet opening, said conduit having an annular surface surrounding said inlet opening; a pair of wear rings each releasably surrounding one of said apertures and adapted for sealing engagement with said annular surface in response to registry of said inlet opening with the respective aperture; and a shaft member fast with said conduit and coaxial with said inlet, said shaft member being journalled for movement in a sense pivoting said conduit between two end positions in each of which said inlet opening registers with one of said apertures.
Claim 12
Dependent Claim
172 words
In a pump for viscous materials, particularly for concrete, in combination, at least two cylinders each accommodating a reciprocable piston; a receiving channel adapted to receive material expelled from the respective cylinders, and having an inlet; a casing provided with said cylinders and having an endwall provided with two apertures; a hopper adapted to contain viscous material and having a bottom portion, said hopper communicating via said two apertures with the respective cylinders; a curved conduit in said hopper having an outlet opening coaxial and axially registering with said inlet, and an inlet opening; a drum fixed to and turnable with said conduit and having opposite open ends sealingly connected with said bottom portion of said hopper and with said endwall of said casing radially outwardly of said apertures; and a shaft member fast with said conduit and coaxial with said inlet, said shaft member being journalled for movement in a sense pivoting said conduit between two end positions in each of which said inlet opening registers with one of said apertures.
Claim 13
Dependent Claim
172 words
In a pump for viscous materials, particularly for concrete, in combination, at least two cylinders each accommodating a reciprocable piston; a receiving channel adapted to receive material expelled from the respective cylinders, and having an inlet; a casing provided with said cylinders and having an endwall provided with two apertures; a hopper adapted to contain viscous material and having a bottom portion, said hopper communicating via said two apertures with the respective cylinders; a curved conduit in said hopper having an outlet opening coaxial and axially registering with said inlet, and an inlet opening; a drum fixed to and turnable with said conduit and having opposite open ends sealingly connected with said bottom portion of said hopper and with said endwall of said casing radially outwardly of said apertures; and a shaft member fast with said conduit and coaxial with said inlet, said shaft member being journalled for movement in a sense pivoting said conduit between two end positions in each of which said inlet opening registers with one of said apertures.
References Cited (Backward Citations)
FR910526A
Cited
US3380388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |