Patent US4609081A successfully refreshed from Google Patents.
US4609081A
Expired / Lapsed
US
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Hydraulic snubber
Assignee: Esco Corp
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Filing: 1984-07-12
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Granted: 1986-09-02
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Expires: 2004-07-12
Abstract
Abstract A hydraulic snubber suitable for a skidding grapple or the like in which a twisted figure eight housing is provided to oppose free swinging in two mutually perpendicular horizontal directions, each portion of the figure eight body having a cylinder housing a rotor with each rotor and cylinder having radially extending vanes equipped with flexible, orifice equipped vane extensions.
Inventors
- 👤 Emory D. Hungerford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:27
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/10; F16F9/14; F16F9/145; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32549; Y10T403/32557; Y10T403/32591
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
In a hydraulic snubber, a cylinder having a rotor axially disposed therein, said rotor being adapted to rotate relative to said cylinder, a first radially extending vane in said cylinder and a second radially extending vane on said rotor, means coupling the said rotor and cylinder between elements as to which the relative rotation is to be damped, each vane being equipped with a resilient extension for adjustably limiting the flow of fluid therepast and equally in both directions of rotation from one side of said vane to the other, each extension being equipped with at least two orifices communicting one side of its associated vane with the other, each orifice being equipped with a pocket, with the pockets in a given extension being located adjacent opposite sides of their associated extension.
Claim 2
Dependent Claim
132 words
In a hydraulic snubber, a cylinder having a rotor axially disposed therein, said rotor being adapted to rotate relative to said cylinder, a first radially extending vane in said cylinder and a second radially extending vane on said rotor, means coupling the said rotor and cylinder between elements as to which the relative rotation is to be damped, each vane being equipped with a resilient extension for adjustably limiting the flow of fluid therepast and equally in both directions of rotation from one side of said vane to the other, each extension being equipped with at least two orifices communicting one side of its associated vane with the other, each orifice being equipped with a pocket, with the pockets in a given extension being located adjacent opposite sides of their associated extension.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-01 | 1990-03-03 | 1990-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-01 | 1994-03-03 | 1994-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-01 | 1998-03-03 | 1998-09-02 | $7700.00 | Window Closed / Lapsed |