US3577802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leaf spring tuned viscous vibration damper
Assignee: Vibratech Inc
•
Filing: 1969-03-07
•
Granted: 1971-05-04
•
Expires: 1989-03-07
Abstract
Abstract Resilient generally axially extending spokes are anchored at radially outer ends thereof to the radially outer wall within a circular working chamber of a housing, with the radially inner ends of the spokes connected to an inertia mass flywheel for energy absorption, tuned damping of relative oscillatory vibratory motions between the flywheel and the housing. Relative vibratory oscillations are also resisted by a viscous damping medium coupling between confronting shear film spaced parallel surfaces of the housing and the inertia mass.
Inventors
- 👤 Rollin Douglas Rumsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:25
CPC Classifications
F; F16; F16F; F16F15/00; F16F15/10; F16F15/12; F16F15/121; F16F15/1215; F16D; F16D3/00; F16D3/50; F16D3/56; F16F15/16; F16F15/167; F16F15/173; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2121; Y10T74/2122; Y10T74/2125
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
129 words
A tuned torsional viscous vibration damper comprising: housing means providing a circular working chamber provided with an annular spoke-anchoring structure at its radially outer diameter and facing radially inwardly; generally radially extending resilient turning spokes having radially outer end portions thereof fixedly connected to said anchoring structure; an inertia mass torsionally movably related to said housing within said working chamber and having an annular radially outer perimeter spaced radially inwardly from said anchoring structure with radially inner end portions of said spokes connected thereto; and viscous damping medium in said chamber; said inertia mass and said housing having confronting parallel surfaces in shear film spaced relation having regard to the viscosity of said viscous damping medium whereby to provide viscous damping coupling between the inertia mass and the housing.
Claim 2
Dependent Claim
129 words
A tuned torsional viscous vibration damper comprising: housing means providing a circular working chamber provided with an annular spoke-anchoring structure at its radially outer diameter and facing radially inwardly; generally radially extending resilient turning spokes having radially outer end portions thereof fixedly connected to said anchoring structure; an inertia mass torsionally movably related to said housing within said working chamber and having an annular radially outer perimeter spaced radially inwardly from said anchoring structure with radially inner end portions of said spokes connected thereto; and viscous damping medium in said chamber; said inertia mass and said housing having confronting parallel surfaces in shear film spaced relation having regard to the viscosity of said viscous damping medium whereby to provide viscous damping coupling between the inertia mass and the housing.
Claim 3
Dependent Claim
117 words
A damper according to claim 1, said housing means comprising a pair of spaced sideplates, respective radially inner and radially outer walls comprising spacing Ring, means securing said rings in radially spaced concentric relation to and between said plates, said radially outer wall ring having said spoke-anchoring structure provided with inwardly opening slots, said spokes comprising leaf springs having their radially outer ends engaged in said slots, said inertia mass comprising a ring member in spaced adjacency to said inner spacing wall ring and provided with slots opening into the working chamber defined between said plates and said wall rings, and the inner end portions of the spokes being received in the slots in the inertia ring.
Claim 4
Dependent Claim
24 words
A damper according to claim 1, including filler means between at least some of said spokes to reduce the volumetric area within said chamber.
Claim 5
Dependent Claim
33 words
A damper according to claim 1, said spokes comprising leaf springs disposed by cooperative pairs maintained under preload tension toward one another, thereby assuring zero backlash between the inertia member and the housing.
Claim 6
Dependent Claim
14 words
A damper according to claim 1, in which said spokes are laminated leaf springs.
Claim 7
Dependent Claim
88 words
A damper according to claim 1, said housing means comprising a radially inner and a radially outer wall whereby said working chamber is annular, said radially outer wall having said spoke-anchoring structure thereon within said chamber having slots therein, said spokes comprising leaf springs having their radially outer ends in said slots, said inertia mass comprising a ring member having its inner perimeter adjacent to said radially inner wall and having transverse slots in its outer perimeter within which the inner end portions of said spokes are engaged.
Claim 8
Dependent Claim
24 words
A damper according to claim 6, including rigid rockably mounted locators between and in engagement with said inertia ring member and said spoke-anchoring structure.
Claim 9
Dependent Claim
41 words
A damper according to claim 1, said housing means having a circular radially outer wall, and said spoke-anchoring structure for the radially outer end portions of said spokes comprising a ring-shaped member assembled in said chamber and secured to said wall.
Claim 10
Dependent Claim
89 words
A damper according to claim 8, said housing means having radially extending sidewalls along said chamber, said ring-shaped anchoring member having slots therein on its inner perimeter, said spokes comprising leaf springs with their radially outer end portions mounted in said slots, said anchoring member and said spokes being narrower than the space between said sidewalls, and spacer means between the ends of said anchoring member and said sidewalls retaining said spokes against displacement in axial direction from said slots and with their side edges spaced from said sidewalls.
Claim 11
Dependent Claim
35 words
A damper according to claim 9, said inertia mass having extensions into the space between said sidewalls and said spoke side edges and provided with working surfaces opposing said sidewalls in shear film spaced relation.
Claim 12
Dependent Claim
34 words
A damper according to claim 1, said spokes comprising resilient leaf springs, said spoke-anchoring structure having radially inwardly opening axially extending slots within which the radially outer end portions of the spokes are engaged.
Claim 13
Dependent Claim
39 words
A damper according to claim 11, including means retaining said spokes against axial displacement relative to said slots and maintaining opposite side edges of the spokes in spaced relation to confronting surfaces of the housing means within said chamber.
Claim 14
Dependent Claim
44 words
A damper according to claim 11, having damping surface extension discs attached to said inertia mass and interposed between edges of the spokes and said confronting housing surfaces in the chamber and having working surfaces in shear film spaced relation to said confronting surfaces.
Claim 15
Dependent Claim
14 words
A damper according to claim 13, rivets securing said discs to the inertia mass.
Claim 16
Dependent Claim
50 words
A damper according to claim 13, said inertia mass having slots therein within which the radially inner end portions of the spokes are engaged, and said discs having radially inner marginal portions fixedly secured to said inertia mass and retaining the inertia mass against axiaL displacement relative to said spokes.
Claim 17
Dependent Claim
33 words
A damper according to claim 13, said discs comprising lightweight metal and of a diameter to extend at outer peripheries thereof adjacent to said means on said housing having said inwardly opening slots.
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) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |