US3811802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slurry pump cleanout mechanism
Assignee: Engineered Concrete Placer Inc
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Filing: 1972-12-06
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Granted: 1974-05-21
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Expires: 1992-12-06
Abstract
Abstract Concrete slurry pumps, particularly a mechanism enabling separation of the valve housing from the pumping cylinders, to enable a washing cleanout of the cylinders and pumping pistons therein.
Inventors
- 👤 C Semple
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:58
CPC Classifications
F; F04; F04B; F04B15/00; F04B15/02; Y; Y10; Y10S; Y10S417/00; Y10S417/90
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
176 words
A slurry pump cleanout mechanism comprising: A. a base stationary frame; B. a slideable frame reciprocably supported within said base frame, and including cam followers engageable with said stationary frame; C. a receiver hopper and valve housing including receiving and discharge ports, removeably secured to a free end of said slideable frame; D. at least one concrete pumping cylinder including a pumping piston, supported in said base frame so that its discharge end is removably connectable to said receiving port in said valve housing, as said sliding frame is nestled within said base frame; and E. a drive unit interconnecting said base frame and said slideable frame, so as to slide said slideable frame longitudinally with respect to said base frame, so as to disengage said valve housing from said cylinder, said drive unit including a hydraulic piston having a pulley mounted upon its piston rod and cable means interconnecting opposite ends of said slideable frame with said pulley, such that said movement of said piston reciprocates said slideable frame with respect to said base frame.
Claim 2
Dependent Claim
176 words
A slurry pump cleanout mechanism comprising: A. a base stationary frame; B. a slideable frame reciprocably supported within said base frame, and including cam followers engageable with said stationary frame; C. a receiver hopper and valve housing including receiving and discharge ports, removeably secured to a free end of said slideable frame; D. at least one concrete pumping cylinder including a pumping piston, supported in said base frame so that its discharge end is removably connectable to said receiving port in said valve housing, as said sliding frame is nestled within said base frame; and E. a drive unit interconnecting said base frame and said slideable frame, so as to slide said slideable frame longitudinally with respect to said base frame, so as to disengage said valve housing from said cylinder, said drive unit including a hydraulic piston having a pulley mounted upon its piston rod and cable means interconnecting opposite ends of said slideable frame with said pulley, such that said movement of said piston reciprocates said slideable frame with respect to said base frame.
Claim 3
Dependent Claim
31 words
A slurry pump cleanout mechanism as in claim 1, including at least two concrete pumping cylinders mounted in said base frame and connectable to said receiving port in said valve housing.
Claim 4
Dependent Claim
29 words
A slurry pump cleanout mechanism as in claim 2, said stationary frame including an upper track, said cam follower being supported intermediate said slideable frame and said upper track.
Claim 5
Dependent Claim
33 words
A slurry pump cleanout mechanism as in claim 3, including a lower truck frame positioned between said pumping cylinders and a cam follower interposed between said slideable frame and said lower truck frame.
Claim 6
Dependent Claim
35 words
A slurry pump clEanout mechanism as in claim 4, including limit switch means mounted upon said base frame, so as to disengage said hydraulic cylinder as said slideable frame is nestled within said base frame.
Claim 7
Dependent Claim
27 words
A slurry pump cleanout mechanism as in claim 5, said valve housing including a pry block adjacent said receiving port and connectable to said concrete pumping cylinders.
Claim 8
Dependent Claim
24 words
A slurry pump cleanout mechanism as in claim 6, said receiver hopper being mounted above said valve housing intermediate said receiving and discharge ports.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |