Patent US3869104A successfully refreshed from Google Patents.
US3869104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft barricade net erection system
Assignee: United States Department of the Navy
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Filing: 1973-11-28
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Granted: 1975-03-04
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Expires: 1993-11-28
Abstract
Abstract A cross-runway barricade net is raised and lowered by hydraulically powered rotary actuator of the rack and pinion type. The hydraulic power pack contains an automatic recharge unit which permits rapid sequential raising and raising of the barricade net by quickly restoring the accumulator of the hydraulic power pack to its initial pressure value.
Inventors
- 👤 Eugene Gallo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:27
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/02; B64F1/027
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
271 words
In combination with an aircraft arresting system, said system comprising a crossrunway barrier member adapted to be engaged by an aircraft upon landing and supported at each end by a pair of stanchions mounted on opposite sides of the runway for movement between raised and lowered positions, a control means for raising and lowering said stanchions comprising: fluid powered stanchion actuator means connected to each stanchion for raising and lowering the same and including at least one rack and pinion arranged in cooperative relationship; hydraulic power pack means operatively connected to each said stanchion actuator means for supplying high pressure fluid to and exhausting spent fluid from said stanchion actuator means; and wherein said hydraulic power pack means includes, a three-position, solenoid-controlled distribution valve, said distribution valve having an internal pilot line arranged to prevent operation of said distribution valve in the absence of sufficient fluid pressure; an accumulator operatively connected to said stanchion actuator means by said distribution valve; means connected to said accumulator for recharging said accumulator; a flow control valve hydraulically connected between said distribution valve and said stanchion actuator means; said flow control valve including a free flow path and a variable orifice path parallel to said free flow path; said distribution valve arranged to channel high pressure fluid directly to said stanchion actuator means and to channel exhausted fluid through said free flow path when said barrier member is raised; and said distribution valve arranged to channel high pressure fluid to said stanchion actuator means via said variable orifice path and to channel exhausted fluid around said flow control valve when said barrier member is lowered.
Claim 2
Dependent Claim
271 words
In combination with an aircraft arresting system, said system comprising a crossrunway barrier member adapted to be engaged by an aircraft upon landing and supported at each end by a pair of stanchions mounted on opposite sides of the runway for movement between raised and lowered positions, a control means for raising and lowering said stanchions comprising: fluid powered stanchion actuator means connected to each stanchion for raising and lowering the same and including at least one rack and pinion arranged in cooperative relationship; hydraulic power pack means operatively connected to each said stanchion actuator means for supplying high pressure fluid to and exhausting spent fluid from said stanchion actuator means; and wherein said hydraulic power pack means includes, a three-position, solenoid-controlled distribution valve, said distribution valve having an internal pilot line arranged to prevent operation of said distribution valve in the absence of sufficient fluid pressure; an accumulator operatively connected to said stanchion actuator means by said distribution valve; means connected to said accumulator for recharging said accumulator; a flow control valve hydraulically connected between said distribution valve and said stanchion actuator means; said flow control valve including a free flow path and a variable orifice path parallel to said free flow path; said distribution valve arranged to channel high pressure fluid directly to said stanchion actuator means and to channel exhausted fluid through said free flow path when said barrier member is raised; and said distribution valve arranged to channel high pressure fluid to said stanchion actuator means via said variable orifice path and to channel exhausted fluid around said flow control valve when said barrier member is lowered.
Claim 3
Dependent Claim
51 words
The combination according to claim 1 wherein said stanchion actuator means comprises: a housing having four ports; two racks contained within said housing each rack having flat piston-like faces at their respective ends; and a pinion located between said racks in operative engagement therewith, said pinion drivingly connected to said stanchion.
Claim 4
Dependent Claim
37 words
The combination according to claim 2 wherein said recharging means includes: a pressure switch connected to sense accumulator pressure; and a motor-pump unit responsive to said switch and hydraulically connected to the accumulator for recharging the same.
Claim 5
Independent Claim
212 words
A device for raising and lowering a member comprising: fluid powered actuator means connected to said member for raising and lowering the same and including at least one rack and pinion arranged in cooperative relationship; hydraulic power pack means connected to said actuator means for supplying high pressure fluid to and exhausting spent fluid from said actuator means; and wherein said hydraulic power pack means includes, a three-position, solenoid-controlled, distribution valve, said distribution valve having an internal pilot line arranged to prevent operation of said distribution valve in the absence of sufficient fluid pressure; an accumulator operatively connected to said actuator means by said distribution valve; means connected to said accumulator for recharging said accumulator; a flow control valve hydraulically connected between said distribution valve and said actuator means; said flow control valve including a free flow path and a variable orifice path parallel to said free flow path; said distribution valve arranged to channel high pressure fluid directly to said actuator means and to channel exhausted fluid through said free flow path when said member is raised; and said distribution valve arranged to channel high pressure fluid to said actuator means via said variable orifice path and to channel exhausted fluid around said flow control valve when said member is lowered.
Claim 6
Independent Claim
212 words
A device for raising and lowering a member comprising: fluid powered actuator means connected to said member for raising and lowering the same and including at least one rack and pinion arranged in cooperative relationship; hydraulic power pack means connected to said actuator means for supplying high pressure fluid to and exhausting spent fluid from said actuator means; and wherein said hydraulic power pack means includes, a three-position, solenoid-controlled, distribution valve, said distribution valve having an internal pilot line arranged to prevent operation of said distribution valve in the absence of sufficient fluid pressure; an accumulator operatively connected to said actuator means by said distribution valve; means connected to said accumulator for recharging said accumulator; a flow control valve hydraulically connected between said distribution valve and said actuator means; said flow control valve including a free flow path and a variable orifice path parallel to said free flow path; said distribution valve arranged to channel high pressure fluid directly to said actuator means and to channel exhausted fluid through said free flow path when said member is raised; and said distribution valve arranged to channel high pressure fluid to said actuator means via said variable orifice path and to channel exhausted fluid around said flow control valve when said member is lowered.
Claim 7
Dependent Claim
50 words
The combination according to claim 4 wherein said actuator means includes: a housing having four ports; two racks contained within said housing each rack having flat piston-like faces at their respective ends; and a pinion located between said racks in operative engagement therewith, said pinion being connected to said member.
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) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |