Patent JPH03419A successfully refreshed from Google Patents.
Patent US4021154A successfully refreshed from Google Patents.
US4021154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Servomechanism for pump capacity control
Assignee: Individual
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Filing: 1975-10-02
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Granted: 1977-05-03
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Expires: 1995-10-02
Abstract
Abstract A servomechanism for pump capacity control includes an adjustable throttle of the "nozzle-gate" type formed with two operating slots communicating through two fixed throttles with duct, a source of supply feeding the duct, an input signal converter whose movable element is connected to the gate of the nozzle-gate throttle and a four-slot, five-line distributor whose control spaces are in communication through two fixed throttles with the duct of the source of supply, two operating slots being formed in the adjustable throttle, whereas its operating spaces communicate with the corresponding spaces of an actuating hydraulic cylinder. The latter is connected to the control element and, by a mechanical position feedback, to the gate. The mechanical position feedback is constituted by a bar which is linked to the movable element of the hydraulic cylinder and has a slanted surface. The slanted surface interacts with a spring-loaded pusher, whose springs act on the gate. The servomechanism incorporates a device which ensures linear dependence of the speed of hydraulic cylinder movement on the displacement of the gate away from the neutral position, and acts on the slide valve of the four-slot five-line distributor. The servomechanism additionally includes a mechanism for limiting the power of the controlled pump, the mechanism being linked mechanically with the hydraulic cylinder and the gate of the nozzle-gate throttle, and hydraulically with the discharge line of the controlled pump.
Inventors
- 👤 Mikhail Fedorovich Gorchakov
- 👤 Mikhail Grigorievich Kabakov
- 👤 Leonid Nikolaevich Kashtanov
- 👤 Viktor Prokofievich Morozov
- 👤 Jury Ivanovich Chuprakov
- 👤 Vitaly Fedorovich Scherbakov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:52
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/08; F04B49/002; F04B2201/00; F04B2201/12; F04B2201/1203
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
354 words
A servomechanism for pump capacity control comprising a casing; an adjustable throttle of the "nozzle-gate" type received in said casing, said throttle having a gate and two nozzles, said nozzles having end faces, operating slots of said throttle being formed between said gate and the end faces of said nozzles; two fixed throttles received in said casing; a source of supply feeding a duct, said duct communicating through said two fixed throttles with said adjustable throttle; an input signal converter received in said casing; a movable element of said input signal converter linked with said gate; a four-slot, five-line distributor having a slide valve and being formed with a plurality of control and operating spaces, installed in said casing; said control spaces communicating through said two fixed throttles with said duct of said source of supply and with said two operating slots of said adjustable throttle; an element for controlling the capacity of said pump, said pump having a discharge line; an actuating hydraulic cylinder being formed with a plurality of spaces, having a movable element and being located in said casing, connected to the pump capacity control element and linked by mechanical position feedback with said gate the spaces of said actuating hydraulic cylinder communicating with the corresponding operating spaces of said four-slot, five-line distributor; a bar located in said casing, formed with a slanted surface and connected to said movable element of said actuating hydraulic cylinder; a spring-loaded pusher installed in said casing and interacting with said slanted surface of the bar; the spring of said pusher being received in said casing and acting on said gate, said bar and said spring-loaded pusher constituting said mechanical position feedback of said hydraulic cylinder; a device located in said casing for ensuring a linear dependence of the speed of movement of said hydraulic cylinder on the displacement of said gate away from the neutral position and acting on said slide valve of the four-slot, five-line distributor; a mechanism for limiting the power of said pump, linked mechanically with said hydraulic cylinder and said gate, and hydraulically with said discharge line of said controlled-capacity pump.
Claim 2
Dependent Claim
354 words
A servomechanism for pump capacity control comprising a casing; an adjustable throttle of the "nozzle-gate" type received in said casing, said throttle having a gate and two nozzles, said nozzles having end faces, operating slots of said throttle being formed between said gate and the end faces of said nozzles; two fixed throttles received in said casing; a source of supply feeding a duct, said duct communicating through said two fixed throttles with said adjustable throttle; an input signal converter received in said casing; a movable element of said input signal converter linked with said gate; a four-slot, five-line distributor having a slide valve and being formed with a plurality of control and operating spaces, installed in said casing; said control spaces communicating through said two fixed throttles with said duct of said source of supply and with said two operating slots of said adjustable throttle; an element for controlling the capacity of said pump, said pump having a discharge line; an actuating hydraulic cylinder being formed with a plurality of spaces, having a movable element and being located in said casing, connected to the pump capacity control element and linked by mechanical position feedback with said gate the spaces of said actuating hydraulic cylinder communicating with the corresponding operating spaces of said four-slot, five-line distributor; a bar located in said casing, formed with a slanted surface and connected to said movable element of said actuating hydraulic cylinder; a spring-loaded pusher installed in said casing and interacting with said slanted surface of the bar; the spring of said pusher being received in said casing and acting on said gate, said bar and said spring-loaded pusher constituting said mechanical position feedback of said hydraulic cylinder; a device located in said casing for ensuring a linear dependence of the speed of movement of said hydraulic cylinder on the displacement of said gate away from the neutral position and acting on said slide valve of the four-slot, five-line distributor; a mechanism for limiting the power of said pump, linked mechanically with said hydraulic cylinder and said gate, and hydraulically with said discharge line of said controlled-capacity pump.
Claim 3
Dependent Claim
131 words
A servomechanism according to claim 1 wherein said power-limiting mechanism of the controlled pump comprises a bar with a curvilinear surface ensuring automatic control of pump capacity according to a preset law; a spring received in said casing; a plunger located in said casing and transmitting fluid pressure in said discharge line of the controlled pump, one end of said bar resting on said spring, its other end interacting with said plunger, a spring-loaded pusher interacting with said curvilinear surface of the bar, a two-arm lever pivoted on said spring-loaded pusher, a clearance being formed between said spring-loaded pusher and said gate, one arm of said lever interacting with said gate, the other arm of said lever resting on said spring-loaded pusher of said mechanical position feedback of the hydraulic cylinder.
Claim 4
Dependent Claim
37 words
A servomechanism according to claim 2 wherein two chambers are formed in said casing and communicate with the spaces of said nozzles, each end of said bar formed with the curvilinear surface being located in said chamber.
Claim 5
Dependent Claim
68 words
A servomechanism according to claim 2 wherein said mechanism for limiting pump power further comprises adjusting screws, one of said screws being installed on said arm of the two-arm lever interacting with said gate, the other arm being installed in said casing and interacting with the plunger, the third arm being installed in said casing and interacting with said spring supporting said bar formed with the curvilinear surface.
Claim 6
Dependent Claim
67 words
A servomechanism according to claim 3 wherein said mechanism for limiting pump power comprises adjusting screws, one of said screws being installed on said arm of the two-arm lever interacting with said gate, the other arm being installed in said casing and interacting with the plunger, the third arm being installed in said casing and interacting with said spring supporting said bar formed with the curvilinear surface.
Claim 7
Dependent Claim
77 words
A servomechanism according to claim 1 wherein said device ensuring the linear dependence of the speed of hydraulic cylinder movement on the displacement of the gate away from the neutral position and acting on the slide valve of the four-slot, five-line distributor is formed with two chambers located in said casing, said chambers communicating with the corresponding control spaces of said distributor, each of said chambers receiving one end of said bar formed with the slanted surface.
Claim 8
Dependent Claim
77 words
A servomechanism according to claim 2 wherein said device ensuring the linear dependence of the speed of hydraulic cylinder movement on the displacement of the gate away from the netural position and acting on the slide valve of the four-slot, five-line distributor is formed with two chambers located in said casing, said chambers communicating with the corresponding control spaces of said distributor, each of said chambers receiving one end of said bar formed with the slanted surface.
Claim 9
Dependent Claim
77 words
A servomechanism according to claim 3 wherein said device ensuring the linear dependence of the speed of hydraulic cylinder movement on the displacement of the gate away from the netural position and acting on the slide valve of the four-slot, five-line distributor is formed with two chambers located in said casing, said chambers communicating with the corresponding control spaces of said distributor, each of said chambers receiving one end of said bar formed with the slanted surface.
Claim 10
Dependent Claim
77 words
A servomechanism according to claim 4 wherein said device ensuring the linear dependence of the speed of hydraulic cylinder movement on the displacment of the gate away from the neutral position and acting on the slide valve of the four-slot five-line distributor is formed wth two chambers located in said casing, said chambers communicating with the corresponding control spaces of said distributor, each of said chambers receiving one end of said bar formed with the slanted surface.
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) | 1980-05-02 | 1980-11-01 | 1981-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-02 | 1984-11-01 | 1985-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-02 | 1988-11-01 | 1989-05-03 | $7700.00 | Window Closed / Lapsed |