US4030378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Redundant pushrod-to-bellcrank connection
Assignee: RTX Corp
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Filing: 1976-03-11
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Granted: 1977-06-21
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Expires: 1996-03-11
Abstract
Abstract A pushrod-to-bellcrank attachment includes a primary pivot connection and two secondary pin and slot connections so arranged relative to each other that there is a continuing operative connection of the pushrod to the bellcrank in the event the primary connection is lost by small arms fire. When the primary pivot is lost, the pins of the secondary connections act in conjunction with the slots, which are arcuate, as a large bearing struck about the primary pivot to maintain the rod and the bellcrank in their original relative positions about the primary pivot with no introduction of lost motion between bellcrank and rod.
Inventors
- 👤 Edward James Kroesser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:06
CPC Classifications
B; B64; B64C; B64C13/00; B64C13/24; B64C13/26; B64C13/28; B64C13/341; G; G05; G05G; G05G1/00; G05G1/04; Y; Y10; Y10T; Y10T403/00; Y10T403/16; Y10T403/32; Y10T403/32254; Y10T403/32262; Y10T403/32319; Y10T403/32377; Y10T403/32549; Y10T403/32557; Y10T403/32581; Y10T403/32606; Y10T403/32861; Y10T403/32918; Y10T74/00; Y10T74/18; Y10T74/18992; Y10T74/20; Y10T74/20576; Y10T74/20582; Y10T74/20882
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
68 words
In an aircraft control system, a bellcrank member, a rod member, a primary pivot connecting one end of said rod member to said bellcrank member, secondary pivot means connecting said members comprising bearing means concentric with and spaced radially from said primary pivot, said bearing means including at least two spaced sets of aligned holes and arcuate slots in said members and pivot means extended through each set.
Claim 2
Dependent Claim
68 words
In an aircraft control system, a bellcrank member, a rod member, a primary pivot connecting one end of said rod member to said bellcrank member, secondary pivot means connecting said members comprising bearing means concentric with and spaced radially from said primary pivot, said bearing means including at least two spaced sets of aligned holes and arcuate slots in said members and pivot means extended through each set.
Claim 3
Dependent Claim
91 words
In an aircraft control system, a bellcrank member, a rod member, a primary pivot connecting an end of said rod member to an arm of said bellcrank member, a secondary pivot connecting said members comprising bearing means concentric with said primary pivot, said bearing means including two spaced sets of bearing elements, each set including a passage in one of said members and an arcuate slot in the other of said members and pivot means which is a close fit in said passage means and said slot extended through each set.
Claim 4
Dependent Claim
91 words
In an aircraft control system, a bellcrank member, a rod member, a primary pivot connecting an end of said rod member to an arm of said bellcrank member, a secondary pivot connecting said members comprising bearing means concentric with said primary pivot, said bearing means including two spaced sets of bearing elements, each set including a passage in one of said members and an arcuate slot in the other of said members and pivot means which is a close fit in said passage means and said slot extended through each set.
Claim 5
Dependent Claim
79 words
In an aircraft control system, a bellcrank member, a rod member, a primary pivot connecting one end of said rod member to said bellcrank member, a secondary pivotal connection between said members comprising bearing means for pivotally supporting said rod end on said bellcrank concentric with and radially spaced from said primary pivot, said bearing means including aligned passages and arcuate slots in said members and at least two pivot means extended through said aligned passages and slot means.
Claim 6
Dependent Claim
79 words
In an aircraft control system, a bellcrank member, a rod member, a primary pivot connecting one end of said rod member to said bellcrank member, a secondary pivotal connection between said members comprising bearing means for pivotally supporting said rod end on said bellcrank concentric with and radially spaced from said primary pivot, said bearing means including aligned passages and arcuate slots in said members and at least two pivot means extended through said aligned passages and slot means.
Claim 7
Dependent Claim
25 words
The control system of claim 3 in which the bearing means includes a separate slot in each member and aligned passages in the other member.
Claim 8
Dependent Claim
99 words
In an aircraft control system, a bellcrank member, a control rod member, first means connecting one end of said control rod member to said bellcrank member providing a primary pivot, second means adjacent said first means connecting the end of said rod member to said bellcrank member and providing a second pivot, said rod member normally having its longitudinal axis in substantial alignment with said primary pivot, and third means for attaching the end of said rod member to said bellcrank member providing means for maintaining the normal alignment of said rod member upon loss of said primary pivot.
Claim 9
Dependent Claim
99 words
In an aircraft control system, a bellcrank member, a control rod member, first means connecting one end of said control rod member to said bellcrank member providing a primary pivot, second means adjacent said first means connecting the end of said rod member to said bellcrank member and providing a second pivot, said rod member normally having its longitudinal axis in substantial alignment with said primary pivot, and third means for attaching the end of said rod member to said bellcrank member providing means for maintaining the normal alignment of said rod member upon loss of said primary pivot.
Claim 10
Dependent Claim
145 words
In an aircraft control system, a bellcrank member, a rod member having a connection to said bellcrank member, said connection including means for attaching one end of said rod member to said bellcrank member providing a precise primary pivot, a second means for attaching said rod member to said bellcrank member providing a second pivotal connection between said rod and bellcrank members equally as precise as said primary pivot, said second pivotal connection comprising a pin-and-slot bearing between said bellcrank and rod members including arcuate slot means and cooperating spaced holes in said members, said slot means being struck about said primary pivot and said holes being aligned with said slot means and lying on radii extending from said primary pivot and subtending an arc of at least 90° and bolts extended through said slot means and holes providing the pins for said pin-and-slot bearing.
Claim 11
Dependent Claim
145 words
In an aircraft control system, a bellcrank member, a rod member having a connection to said bellcrank member, said connection including means for attaching one end of said rod member to said bellcrank member providing a precise primary pivot, a second means for attaching said rod member to said bellcrank member providing a second pivotal connection between said rod and bellcrank members equally as precise as said primary pivot, said second pivotal connection comprising a pin-and-slot bearing between said bellcrank and rod members including arcuate slot means and cooperating spaced holes in said members, said slot means being struck about said primary pivot and said holes being aligned with said slot means and lying on radii extending from said primary pivot and subtending an arc of at least 90° and bolts extended through said slot means and holes providing the pins for said pin-and-slot bearing.
Claim 12
Dependent Claim
116 words
In an aircraft control system, a bellcrank member, a control rod member, a primary pivot connecting one end of said rod member to said bellcrank member, said primary pivot lying substantially in alignment with the longitudinal axis of said rod member, second pivot means for attaching said rod member to said bellcrank member including a first arcuate slot in one of said members and a passageway for a pivot bolt in the other of said members, and means for maintaining the alignment of said rod member upon loss of said primary pivot including a second arcuate slot in one of said members and a passageway for a second pivot bolt in the other of said members.
Claim 13
Dependent Claim
116 words
In an aircraft control system, a bellcrank member, a control rod member, a primary pivot connecting one end of said rod member to said bellcrank member, said primary pivot lying substantially in alignment with the longitudinal axis of said rod member, second pivot means for attaching said rod member to said bellcrank member including a first arcuate slot in one of said members and a passageway for a pivot bolt in the other of said members, and means for maintaining the alignment of said rod member upon loss of said primary pivot including a second arcuate slot in one of said members and a passageway for a second pivot bolt in the other of said members.
Claim 14
Dependent Claim
41 words
The control system of claim 7 in which the first and second arcuate slots are struck about the primary pivot and radii drawn from the primary pivot to the center of each of said slots define an angle of about 90°.
References Cited (Backward Citations)
US888635A
Cited
US3842687A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |