Patent US1352197A successfully refreshed from Google Patents.
Patent US3601988A successfully refreshed from Google Patents.
US3601988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for building-up fluid pressure pulses
Assignee: Individual
•
Filing: 1969-10-28
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Granted: 1971-08-31
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Expires: 1989-10-28
Abstract
Abstract The invention relates to a device for building up fluid pressure pulses, said device comprising a cylinder and a piston reciprocating inside said cylinder and dividing its cavity into two chambers. The first chamber is in communication with a compressed gas vessel whereas the second one is filled with fluid and has a hole for the discharge of the fluid under the pressure built up by the impact of the piston which is accelerated by the compressed gas contained in the first chamber. The device incorporates a means for replenishing the first chamber with gas (air) pumped from the atmosphere and for bypassing it into the compressed gas vessel during the progressive movement of the piston.
Inventors
- 👤 German Petrovich Chermensky
- 👤 Mikhail Andreevich Nikiforov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:21
CPC Classifications
B; B21; B21J; B21J7/00; B21J7/20; B21J7/22; B21J7/28; B02; B02C; B02C19/00; B05; B05B; B05B12/00; B05B12/02; B05B12/06; B21J5/00; B21J5/04; F; F04; F04B; F04B9/00; F04B9/08; F04B9/10; F04B9/103; F04B9/105; F04B9/12; F04B9/123; F04B9/127
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
179 words
A device for building up fluid pressure pulses comprising: a compressed gas vessel; a cylinder; a piston accommodated in said cylinder and dividing its cavity into two chambers of which the first chamber is in communication with said compressed gas vessel and the second one is filled with fluid and has a hole for the discharge of said fluid when it is struck by said piston which is accelerated by the compressed gas contained in the first chamber: a means for returning the piston to the initial position after it has struck the fluid; suction and discharge valves located in the end wall of said cylinder at the side of the first chamber, the suction valve communicating the first chamber with the atmosphere when the piston moves towards the second chamber, and the discharge valve communicating the first chamber with said compressed gas vessel during the return stroke of said piston; a device for shutting off the channel which communicates the compressed gas vessel with the first chamber when the latter is being filled with gas from the atmosphere.
Claim 2
Independent Claim
179 words
A device for building up fluid pressure pulses comprising: a compressed gas vessel; a cylinder; a piston accommodated in said cylinder and dividing its cavity into two chambers of which the first chamber is in communication with said compressed gas vessel and the second one is filled with fluid and has a hole for the discharge of said fluid when it is struck by said piston which is accelerated by the compressed gas contained in the first chamber: a means for returning the piston to the initial position after it has struck the fluid; suction and discharge valves located in the end wall of said cylinder at the side of the first chamber, the suction valve communicating the first chamber with the atmosphere when the piston moves towards the second chamber, and the discharge valve communicating the first chamber with said compressed gas vessel during the return stroke of said piston; a device for shutting off the channel which communicates the compressed gas vessel with the first chamber when the latter is being filled with gas from the atmosphere.
Claim 3
Dependent Claim
42 words
A device according to claim 1 wherein the discharge valve is screwed into the end wall of the cylinder and, moving along the thread, serves as the means for shutting off the channel communicating the first chamber with the compressed gas vessel.
References Cited (Backward Citations)
US3412554A
Cited
US3521820A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |