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Patent US3709041A successfully refreshed from Google Patents.
US3709041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flueric accelerometer
Assignee: Kearfott Guidance and Navigation Corp
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Filing: 1970-05-04
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Granted: 1973-01-09
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Expires: 1990-05-04
Abstract
Abstract A flueric accelerometer wherein a a FLOW path for pressurized fluid is established through a porous housing, which flow is resisted by a deformable porous matrix comprised of solid material in proportion to acceleration. The housing is adapted to permit measurement of the resistance and therefore the acceleration.
Inventors
- 👤 L Galowin
- 👤 Santis M De
- 👤 C Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:08
CPC Classifications
G; G01; G01P; G01P15/00; G01P15/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
168 words
An accelerometer comprising a housing, means including an inlet and an outlet to establish a flow path for fluid through said housing, and a bed of material disposed in said housing in the path of the fluid flow, said bed of material adapted to change the resistance to fluid flow in proportion to changes in acceleration of said housing, said housing including means to permit measurement of said resistance, wherein said bed of material includes a plurality of solid particles forming a proof mass, said plurality of particles being selectively arranged in a spaced relationship forming therebetween a plurality of variablevolume passageways for fluid flow through the bed of material, and wherein said bed of material includes particle support means adapted to resiliently support said particles in said spaced relationship within said housing for moVement of said particles relative to said housing due to an acceleration force and for simultaneous variation of the resistance to fluid flow through said passageways for sensing the amount of the acceleration force.
Claim 2
Dependent Claim
168 words
An accelerometer comprising a housing, means including an inlet and an outlet to establish a flow path for fluid through said housing, and a bed of material disposed in said housing in the path of the fluid flow, said bed of material adapted to change the resistance to fluid flow in proportion to changes in acceleration of said housing, said housing including means to permit measurement of said resistance, wherein said bed of material includes a plurality of solid particles forming a proof mass, said plurality of particles being selectively arranged in a spaced relationship forming therebetween a plurality of variablevolume passageways for fluid flow through the bed of material, and wherein said bed of material includes particle support means adapted to resiliently support said particles in said spaced relationship within said housing for moVement of said particles relative to said housing due to an acceleration force and for simultaneous variation of the resistance to fluid flow through said passageways for sensing the amount of the acceleration force.
Claim 3
Dependent Claim
31 words
The accelerometer of claim 1 wherein said particle support means is in the form of a sponge material and said plurality of particles is a plurality of solid pellets embedded therein.
Claim 4
Dependent Claim
30 words
The accelerometer of claim 1 wherein each said particle is a capsule which is in the form of a thin film of pliable material encapsulating a relatively heavy liquid material.
Claim 5
Dependent Claim
26 words
The accelerometer of claim 1 wherein said particle support means includes gas flow means, said gas flow means being adapted to fluidize said plurality of particles.
Claim 6
Dependent Claim
35 words
The accelerometer of claim 1 wherein said housing includes a porous cylinder, and an additional cylinder extending over said porous cylinder and defining a chamber therewith, said bed of material being disposed in said chamber.
Claim 7
Dependent Claim
24 words
The accelerometer of claim 5 wherein at least one additional chamber for said fluid flow is provided to permit said measurement of said resistance.
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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |