US4349183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring for a ring laser gyro dither mechanism
Assignee: Northrop Grumman Guidance and Electronics Co Inc
•
Filing: 1980-08-04
•
Granted: 1982-09-14
•
Expires: 2000-08-04
Abstract
Abstract An improved flexure spring assembly for a ring laser gyro dither mechanism using flexure springs between a hub and a rim with each spring driven by four piezoelectric crystal wafers, each spring having a reduced cross-sectional area, moment of inertia, and resistance to bending at its radially outward point of attachment to the rim.
Inventors
- 👤 Thomas M. Wirt
- 👤 Robert A. Chechile
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:27
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/58; G01C19/64; G01C19/66; G01C19/68; G01C19/70; F; F16; F16F; F16F15/00; F16F15/005
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
102 words
In the combination of a hub, a rim substantially coaxial with said hub, a plurality of radially directed springs connecting said hub and rim, each said spring being capable of flexing in a circumferential direction to allow limited relative motion between said hub and rim about the common axis of said hub and rim, the flexing of each of said springs having a radially positioned axis of inflection, the improvement comprising: each of said springs having a reduced moment of inertia about an axis parallel to said common axis and an increased circumferential bending in the region of attachment to said rim.
Claim 2
Dependent Claim
102 words
In the combination of a hub, a rim substantially coaxial with said hub, a plurality of radially directed springs connecting said hub and rim, each said spring being capable of flexing in a circumferential direction to allow limited relative motion between said hub and rim about the common axis of said hub and rim, the flexing of each of said springs having a radially positioned axis of inflection, the improvement comprising: each of said springs having a reduced moment of inertia about an axis parallel to said common axis and an increased circumferential bending in the region of attachment to said rim.
Claim 3
Dependent Claim
13 words
Apparatus as recited in claim 1 in which said springs are substantially identical.
References Cited (Backward Citations)
US2735731A
Cited
US2842685A
Cited
US3060334A
Cited
US4085825A
Cited
US4115004A
Cited
US4261211A
Cited
US4238845A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-13 | 1986-03-15 | 1986-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-13 | 1990-03-15 | 1990-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-13 | 1994-03-15 | 1994-09-14 | $7700.00 | Window Closed / Lapsed |