US4047148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston type underwater sound generator
Assignee: United States Department of the Navy
•
Filing: 1956-02-29
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Granted: 1977-09-06
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Expires: 1976-02-29
Abstract
Abstract 1. An apparatus for producing low frequency compressional waves under waterhich comprises two circular plates spaced in opposed parallel relation, a plurality of reciprocating fluid motors arranged in parallel between said plates, an independent fluid pump hydraulically connected to each of said motors for driving the same, a by-pass valve for each motor adjustable to vary the length of the stroke of such motor, a prime mover coupled to drive all of the pumps in synchronism, whereby the motors connected thereto reciprocate in unison to move said plates toward and away from each other at a frequency corresponding to the speed of the prime mover, and means for adjusting all of the by-pass valves in assembly, whereby the amplitude of oscillation of said plates is correspondingly varied.
Inventors
- 👤 Julius Hagemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:03
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/02; G01V1/143; G01V1/145
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
127 words
An apparatus for producing low frequency compressional waves under water which comprises two circular plates spaced in opposed parallel relation, a plurality of reciprocating fluid motors arranged in parallel between said plates, an independent fluid pump hydraulically connected to each of said motors for driving the same, a by-pass valve for each motor adjustable to vary the length of the stroke of such motor, a prime mover coupled to drive all of the pumps in synchronism, whereby the motors connected thereto reciprocate in unison to move said plates toward and away from each other at a frequency corresponding to the speed of the prime mover, and means for adjusting all of the by-pass valves in assembly, whereby the amplitude of oscillation of said plates in correspondingly varied.
Claim 2
Independent Claim
127 words
An apparatus for producing low frequency compressional waves under water which comprises two circular plates spaced in opposed parallel relation, a plurality of reciprocating fluid motors arranged in parallel between said plates, an independent fluid pump hydraulically connected to each of said motors for driving the same, a by-pass valve for each motor adjustable to vary the length of the stroke of such motor, a prime mover coupled to drive all of the pumps in synchronism, whereby the motors connected thereto reciprocate in unison to move said plates toward and away from each other at a frequency corresponding to the speed of the prime mover, and means for adjusting all of the by-pass valves in assembly, whereby the amplitude of oscillation of said plates in correspondingly varied.
Claim 3
Dependent Claim
92 words
Apparatus for generating sound under water comprising a frame, two equal area plates of rigid material resiliently mounted in spaced parallel relation on the frame, a plurality of hydraulic reciprocating motors orthogonally mounted between and so connected to the plates that the reciprocating movement of each of said motors is directly transmitted to the plates to vary their spacing, a plurality of hydraulic pumps, hydraulic lines connecting each pump to a separate motor, whereby each motor is enslaved to an individual pump, and means for driving all of the pumps in synchronism.
Claim 4
Dependent Claim
92 words
Apparatus for generating sound under water comprising a frame, two equal area plates of rigid material resiliently mounted in spaced parallel relation on the frame, a plurality of hydraulic reciprocating motors orthogonally mounted between and so connected to the plates that the reciprocating movement of each of said motors is directly transmitted to the plates to vary their spacing, a plurality of hydraulic pumps, hydraulic lines connecting each pump to a separate motor, whereby each motor is enslaved to an individual pump, and means for driving all of the pumps in synchronism.
Claim 5
Dependent Claim
52 words
Apparatus in accordance with claim 2 wherein each set of hydraulic lines connecting a pump and motor is provided with a shunt line containing a valve and all of the valves are similarly connected to a common control shaft so that movement of the control shaft adjusts all of the valves equally.
References Cited (Backward Citations)
US2148277A
Cited
US2587848A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |