Patent US3782220A successfully refreshed from Google Patents.
US3782220A
Expired / Lapsed
US
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Tension-torsion tie bar
Assignee: Bendix Corp
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Filing: 1972-05-18
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Granted: 1974-01-01
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Expires: 1992-05-18
Abstract
Abstract A laminated tie bar or coupling particularly adapted to interconnect a helicopter rotor arm and rotor blade is provided with a pair of spaced-apart end bushings interconnected by an endless belt. A pair of annular clips encircle the belt adjacent the bushings to draw opposite sides of the belt into parallel alignment. Each clip abuts an associated transverse bar or pin extending between the belt sides and attached to an adjacent end bushing by a layer of flexible strands or wires wound around the end bushing and bar or pin. The bars or pins hold the clips apart and permit twisting of the coupling about an axis extending through the end bushings.
Inventors
- 👤 R Ditlinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:29
CPC Classifications
F; F16; F16C; F16C7/00; F16C7/02; F16C7/026; F16F; F16F1/00; F16F1/36; F16F1/42; F16F1/52; F16F2236/00; F16F2236/12; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2142; Y10T74/2144
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
107 words
A tie bar comprising: a pair of spaced-apart bushings; an endless belt encircling said pair of spaced-apart bushings and having spaced-apart side portions; clip means operatively connected to said endless belt adjacent each of said bushings for urging saId side portions together to establish a predetermined spaced-apart relationship thereof; retaining means including a pin extending between said side portions and transversely thereto into engagement with said clip means; and a plurality of windings of a filament material encircling said transverse pin and associated bushing; said retaining means connecting each of said bushings to said clip means adjacent thereto for maintaining said clip means in predetermined spaced-apart relationship.
Claim 2
Dependent Claim
107 words
A tie bar comprising: a pair of spaced-apart bushings; an endless belt encircling said pair of spaced-apart bushings and having spaced-apart side portions; clip means operatively connected to said endless belt adjacent each of said bushings for urging saId side portions together to establish a predetermined spaced-apart relationship thereof; retaining means including a pin extending between said side portions and transversely thereto into engagement with said clip means; and a plurality of windings of a filament material encircling said transverse pin and associated bushing; said retaining means connecting each of said bushings to said clip means adjacent thereto for maintaining said clip means in predetermined spaced-apart relationship.
Claim 3
Dependent Claim
34 words
A tie bar as claimed in claim 1, wherein: said clip means surrounds said belt and includes two half portions held together by a plurality of windings of a filament material encircling the same.
Claim 4
Dependent Claim
17 words
A tie bar as claimed in claim 1, wherein: said filament material is a continuous metal wire.
Claim 5
Dependent Claim
24 words
A tie bar as claimed in claim 1, wherein: said plurality of windings of filament material are trapped between said bushing and endless belt.
Claim 6
Dependent Claim
28 words
A tie bar as claimed in claim 1, wherein: said endless belt is defined by a plurality of layers of a filament material integrated by an adhesive material.
Claim 7
Dependent Claim
25 words
A tie bar as claimed in claim 1, wherein: said clip means is provided with keyway portions adapted to receive the ends of said pins.
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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |