US3659967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic intensifier
Assignee: Kobe Inc
•
Filing: 1970-05-27
•
Granted: 1972-05-02
•
Expires: 1990-05-27
Abstract
Abstract A hydraulic intensifier operable by a fluid, such as oil, at relatively low pressures to deliver a fluid, such as water, at very high pressures for any desired purpose. The intensifier includes a fluid operated, double acting, reciprocating engine and two single acting, reciprocating pumps respectively located at opposite ends of and in alignment with the engine and connected to the engine for actuation thereby, the displacement of the pumps being small as compared to that of the engine so as to produce a discharge pressure many times the operating fluid pressure. The intensifier is capable of producing discharge pressures of the order of 30,000 to 70,000 psi, or higher, with operating fluid pressures of the order of 2,000 to 5,000 psi. Further, the intensifier is capable of transmitting power of the order of 50 horsepower, or more, in a relatively lightweight unit which is portable and relatively maneuverable.
Inventors
- 👤 Ralph F Mcarthur
- 👤 Max T Kardoes
- 👤 Melle F Geurts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:51
CPC Classifications
F; F01; F01L; F01L25/00; F01L25/02; F01L25/04; F01L25/06; F01L25/066; F04; F04B; F04B11/00; F04B11/0091; F04B53/00; F04B53/10; F04B53/109; F04B53/16; F04B53/162; F04B53/164; F04B9/00; F04B9/08; F04B9/10; F04B9/109; F04B9/111; F04B9/113
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
276 words
In a hydraulic intensifier operable by a fluid at a relatively low pressure to deliver a fluid at a very high pRessure, the combination of: a. a fluid operated, double acting, reciprocating engine; b. said engine including an engine cylinder containing an engine piston having engine piston rods extending therefrom in opposite directions; c. said engine including engine valve means for supplying operating fluid under pressure to opposite ends of said engine cylinder alternately; d. said engine valve means including an engine valve body connected to one end of said engine cylinder in axial alignment therewith; e. said engine valve means including a tubular engine valve movable in said engine valve body on one of said engine piston rods between operating positions wherein it supplies operating fluid under pressure to opposite ends of said engine cylinder, respectively; f. said engine valve means including control means on said one engine piston rod for causing said engine valve to move between its operating positions in response to arrival of said engine piston at the ends of its stroke; g. two oppositely facing, single acting, reciprocating pumps respectively located at opposite ends of and in alignment with said engine; h. said pumps respectively including pump cylinders connected to said engine cylinder and said engine valve body; i. said pumps respectively including pump plungers reciprocable in said pump cylinders and connected to said engine piston rods; j. each of the said pumps including inlet and outlet check valves controlling the admission and discharge of the fluid being pumped; and k. the cross-sectional area of said pump plungers being small as compared to the net cross-sectional area of said engine piston.
Claim 2
Dependent Claim
276 words
In a hydraulic intensifier operable by a fluid at a relatively low pressure to deliver a fluid at a very high pRessure, the combination of: a. a fluid operated, double acting, reciprocating engine; b. said engine including an engine cylinder containing an engine piston having engine piston rods extending therefrom in opposite directions; c. said engine including engine valve means for supplying operating fluid under pressure to opposite ends of said engine cylinder alternately; d. said engine valve means including an engine valve body connected to one end of said engine cylinder in axial alignment therewith; e. said engine valve means including a tubular engine valve movable in said engine valve body on one of said engine piston rods between operating positions wherein it supplies operating fluid under pressure to opposite ends of said engine cylinder, respectively; f. said engine valve means including control means on said one engine piston rod for causing said engine valve to move between its operating positions in response to arrival of said engine piston at the ends of its stroke; g. two oppositely facing, single acting, reciprocating pumps respectively located at opposite ends of and in alignment with said engine; h. said pumps respectively including pump cylinders connected to said engine cylinder and said engine valve body; i. said pumps respectively including pump plungers reciprocable in said pump cylinders and connected to said engine piston rods; j. each of the said pumps including inlet and outlet check valves controlling the admission and discharge of the fluid being pumped; and k. the cross-sectional area of said pump plungers being small as compared to the net cross-sectional area of said engine piston.
Claim 3
Dependent Claim
41 words
A hydraulic intensifier as set forth in claim 1 wherein each of said pumps includes an inlet and an outlet communicating with the outer end of the corresponding pump cylinder and respectively controlled by the corresponding inlet and outlet check valves.
Claim 4
Dependent Claim
22 words
A hydraulic intensifier according to claim 2 wherein the inlet and outlet check valves of each of said pumps are axially aligned.
Claim 5
Dependent Claim
19 words
A hydraulic intensifier as defined in claim 2 including a pulsation reducing chamber interconnecting the outlets of said pumps.
Claim 6
Dependent Claim
26 words
A hydraulic intensifier according to claim 4 wherein said chamber is elongated and extends substantially the full length of said intensifier alongside said engine and pumps.
Claim 7
Dependent Claim
20 words
A hydraulic intensifier as set forth in claim 1 wherein each of said pump cylinders has a concentrically layered construction.
Claim 8
Dependent Claim
17 words
A hydraulic intensifier as defined in claim 6 wherein each of said pump cylinders comprises prestressed layers.
Claim 9
Dependent Claim
27 words
A hydraulic intensifier as set forth in claim 6 wherein each of said pump cylinders incorporates means for minimizing hoop compression in a radially innermost layer thereof.
Claim 10
Dependent Claim
37 words
A hydraulic intensifier according to claim 2 including passage means in each of said pump cylinders adjacent its axially inner end for bleeding off any leakage of pumped fluid between such cylinder and the pump plunger therein.
Claim 11
Dependent Claim
32 words
A hydraulic intensifier as defined in claim 9 including passage means in said engine adjacent the respective ends thereof for bleeding off any leakage of operating fluid along said engine piston rods.
Claim 12
Dependent Claim
43 words
A hydraulic intensifier as set forth in claim 1 including an external passage alongside said engine cylinder and said engine valve body for transferring operating fluid between said engine valve means and the end of said engine cylinder opposite said engine valve means.
Claim 13
Dependent Claim
142 words
In a hydraulic intensifier operable by a fluid at a relatively low pressure to deliver a fluid at a very high pressure, the combination of: a. a fluid operated, double acting, reciprocating engine; b. two single acting, reciprocating pumps respectively located at opposite ends of and in alignment with said engine and connected to said engine for actuation thereby; c. the displacement of said pumps being small as compared to that of said engine; d. each of said pumPs including a pump cylinder having a concentrically layered construction and including prestressed layers; and e. each of said pump cylinders having in a radially innermost layer thereof axially spaced fluid passage means for substantially balancing the internal and external fluid pressures applied to said radially innermost layer at any point along the length thereof to minimize hoop compression in said radially innermost layer.
Claim 14
Dependent Claim
142 words
In a hydraulic intensifier operable by a fluid at a relatively low pressure to deliver a fluid at a very high pressure, the combination of: a. a fluid operated, double acting, reciprocating engine; b. two single acting, reciprocating pumps respectively located at opposite ends of and in alignment with said engine and connected to said engine for actuation thereby; c. the displacement of said pumps being small as compared to that of said engine; d. each of said pumPs including a pump cylinder having a concentrically layered construction and including prestressed layers; and e. each of said pump cylinders having in a radially innermost layer thereof axially spaced fluid passage means for substantially balancing the internal and external fluid pressures applied to said radially innermost layer at any point along the length thereof to minimize hoop compression in said radially innermost layer.
Claim 15
Dependent Claim
33 words
A high pressure pump cylinder as defined in claim 12 including annular seals disposed between each radially innermost layer and the layer radially outwardly thereof and separating said passage means from each other.
References Cited (Backward Citations)
US37195A
Cited
US38531A
Cited
US161441A
Cited
US305972A
Cited
US2548472A
Cited
US2642045A
Cited
US3106169A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |