US3851667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulsator for hydraulic systems controlling actuating mechanisms
Assignee: Individual
•
Filing: 1973-02-13
•
Granted: 1974-12-03
•
Expires: 1993-02-13
Abstract
Abstract In the housing of a pulsator are accommodated a delivery valve and on its opposite ends, a rigidly connected pusher serving for opening the valve and an air cylinder for actuating said valve at its closing coaxially mounted relative thereto. A cavity between the pusher and the delivery valve is constantly connected to a high-pressure main and to an actuating mechanism, a cavity above the valve being connected to a drain main, with a cavity below the pusher being connected to the high-pressure main via a non-return valve, and to a liquid drain main via a valve unit provided with a throttle. The valve unit allows the cavity below the pusher to be completely shut off when the valve is raised and to place it in communication with the liquid drain main when the valve is lowered, which, in turn, increases the high-speed response of the valve, and hence, the number of pulsations per unit of time.
Inventors
- 👤 V Platonov
- 👤 V Popov
- 👤 I Kononov
- 👤 I Maslennikov
- 👤 V Goryainov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:36
CPC Classifications
F; F15; F15B; F15B21/00; F15B21/12; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86413
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
238 words
A pulsator for hydraulic systems controlling actuating mechanisms comprising: a housing; a delivery valve disposed in said housing; an air cylinder having a movable element and adapted for closing said valve, said air cylinder being disposed in said housing coaxially with said delivery valve at one of its ends; a pusher rigidly connected to said delivery valve disposed in said housing coaxially with said valve at its opposite end and serving for opening said delivery valve; a first cavity between said delivery valve and pusher, permanently communicating with a high-pressure main of the hydraulic system and with an actuating mechanism; a second cavity above the valve, communicating with a liquid drain main of the hydraulic system; a third cavity below said pusher; pipelines for connecting said third cavity to said high-pressure and drain mains, respectively; a non-return valve mounted on said pipeline connecting said third cavity to said high pressure main; a throttle mounted on said pipeline connecting the third cavity to said liquid drain main; a valve unit having a movable element mounted on said pipeline ahead of said throttle; the movable element of said valve unit serving to shut off said pipeline as said delivery valve is opened and to be actuated by the movable element of said air cylinder at the end of the delivery valve opening stroke in order to connect said pipeline to said liquid drain main as the delivery valve is closed.
Claim 2
Dependent Claim
238 words
A pulsator for hydraulic systems controlling actuating mechanisms comprising: a housing; a delivery valve disposed in said housing; an air cylinder having a movable element and adapted for closing said valve, said air cylinder being disposed in said housing coaxially with said delivery valve at one of its ends; a pusher rigidly connected to said delivery valve disposed in said housing coaxially with said valve at its opposite end and serving for opening said delivery valve; a first cavity between said delivery valve and pusher, permanently communicating with a high-pressure main of the hydraulic system and with an actuating mechanism; a second cavity above the valve, communicating with a liquid drain main of the hydraulic system; a third cavity below said pusher; pipelines for connecting said third cavity to said high-pressure and drain mains, respectively; a non-return valve mounted on said pipeline connecting said third cavity to said high pressure main; a throttle mounted on said pipeline connecting the third cavity to said liquid drain main; a valve unit having a movable element mounted on said pipeline ahead of said throttle; the movable element of said valve unit serving to shut off said pipeline as said delivery valve is opened and to be actuated by the movable element of said air cylinder at the end of the delivery valve opening stroke in order to connect said pipeline to said liquid drain main as the delivery valve is closed.
Claim 3
Dependent Claim
92 words
The pulsator as claimed in claim 1, wherein said valve unit is provided with a housing and having disposed therein said movable element which is spring loaded and defined by a cylinder, whose side surface forms, in combination with the housing, an annular chamber communicating with the third cavity, while the end surface forms, in combination with the housing, a chamber communicating with the drain main, the movable element having an end surface, and an end piece mounted on the end surface for interacting with the movable element of the air cylinder.
Claim 4
Dependent Claim
52 words
The pulsator as claimed in claim 1, wherein a piston is accommodated in the second cavity the cross-sectional area of the piston being somewhat larger than that of the delivery valve, the piston having end surfaces adapted to interact with the delivery valve and the movable element of the air cylinder, respectively.
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) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |