Patent US3665749A successfully refreshed from Google Patents.
US3665749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shock machine
Assignee: United States Department of the Army
•
Filing: 1970-07-27
•
Granted: 1972-05-30
•
Expires: 1990-07-27
Abstract
Abstract A shock machine using a variable viscosity medium. A magnetic fluid shock tester enables the application of programmed shock pulses without the use of an impact medium. A fluid, whose viscosity can be readily varied in a predetermined manner, is provided with a driving force to set the fluid into motion and this motion in turn is imparted to a test platform which contains the test object. Any sudden change in the viscosity of the fluid is transferred directly to the test item, thereby imparting the desired shock signature to the item. The effect of the shock on the item is then measured electronically or visually as desired.
Inventors
- 👤 Morris Brenner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:35
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/30; G01N3/31; G01N2203/00; G01N2203/003; G01N2203/005
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
107 words
A magnetic fluid shock tester comprising a fluid contained within a container, means for applying a driving force to said fluid, means capable of being driven by said fluid, means for securing a test object to said last-named means, means for varying the viscosity of said fluid in a predetermined manner, means for measuring the effect on said test object of a change in viscosity, and wherein said means for applying a driving force to said fluid comprises a motor, a driving plate connected to said motor by means of a shaft, and a flywheel in physical contact with said fluid and coupled to said driving plate.
Claim 2
Dependent Claim
107 words
A magnetic fluid shock tester comprising a fluid contained within a container, means for applying a driving force to said fluid, means capable of being driven by said fluid, means for securing a test object to said last-named means, means for varying the viscosity of said fluid in a predetermined manner, means for measuring the effect on said test object of a change in viscosity, and wherein said means for applying a driving force to said fluid comprises a motor, a driving plate connected to said motor by means of a shaft, and a flywheel in physical contact with said fluid and coupled to said driving plate.
Claim 3
Dependent Claim
25 words
The device of claim 1 further comprising a plurality of projections on the side of said flywheel which is in physical contact with said fluid.
Claim 4
Dependent Claim
32 words
The device of claim 1 wherein said means capable of being driven by the fluid comprises a test platform in physical contact with said fluid and in parallel location to said flywheel.
Claim 5
Dependent Claim
26 words
The device of claim 3 further comprising a plurality of projections on the side of said test platform which is in physical contact with said fluid.
Claim 6
Dependent Claim
18 words
The device of claim 3 wherein said fluid provides inertial interference with the motion of said test platform.
Claim 7
Dependent Claim
19 words
The device of claim 5 wherein said test platform is held rigidly in place by means of a brake.
References Cited (Backward Citations)
US2667237A
Cited
US2685947A
Cited
US2788654A
Cited
US2744409A
Cited
US3067620A
Cited
US3142978A
Cited
US3372572A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |