WO2017127776A2 - Verrou à double usage - Google Patents

Verrou à double usage Download PDF

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Publication number
WO2017127776A2
WO2017127776A2 PCT/US2017/014480 US2017014480W WO2017127776A2 WO 2017127776 A2 WO2017127776 A2 WO 2017127776A2 US 2017014480 W US2017014480 W US 2017014480W WO 2017127776 A2 WO2017127776 A2 WO 2017127776A2
Authority
WO
WIPO (PCT)
Prior art keywords
bolt
load
spring
latch
clutch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2017/014480
Other languages
English (en)
Other versions
WO2017127776A3 (fr
Inventor
Andres Hernandez
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Centrix Aero LLC
Original Assignee
Centrix Aero LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Centrix Aero LLC filed Critical Centrix Aero LLC
Publication of WO2017127776A2 publication Critical patent/WO2017127776A2/fr
Publication of WO2017127776A3 publication Critical patent/WO2017127776A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D29/00—Power-plant nacelles, fairings or cowlings
    • B64D29/06—Attaching of nacelles, fairings or cowlings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
    • B64C1/14—Windows; Doors; Hatch covers or access panels; Surrounding frame structures; Canopies; Windscreens accessories therefor, e.g. pressure sensors, water deflectors, hinges, seals, handles, latches, windscreen wipers
    • B64C1/1407—Doors; surrounding frames
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B15/00—Other details of locks; Parts for engagement by bolts of fastening devices
    • E05B15/04—Spring arrangements in locks
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B15/00—Other details of locks; Parts for engagement by bolts of fastening devices
    • E05B15/10—Bolts of locks or night latches
    • E05B15/101—Spring-retracted bolts
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B65/00—Locks or fastenings for special use
    • E05B65/10—Locks or fastenings for special use for panic or emergency doors
    • E05B65/102—Locks or fastenings for special use for panic or emergency doors opening under pressure on the surface of the door itself
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C3/00—Fastening devices with bolts moving pivotally or rotatively
    • E05C3/02—Fastening devices with bolts moving pivotally or rotatively without latching action
    • E05C3/04—Fastening devices with bolts moving pivotally or rotatively without latching action with operating handle or equivalent member rigid with the bolt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
    • B64C2001/009—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like comprising decompression panels or valves for pressure equalisation in fuselages or floors

Definitions

  • This description relates generally to latches and more specifically to latches for aircraft panels.
  • Pressure relief latches, and panel latches are often used in aircraft to vent pressure from an enclosure and to provide panel access respectively.
  • pressure relief latches are often of a friction type that does not perform well over wide ranges of pressure.
  • a dual purpose latch operating as a pressure release latch, and access panel latch, is described below.
  • the latch is primarily used in aircraft, and is of a simplified design, tending to make it economical and more reliable.
  • This strike area is normally part of the sub structure around the access panel.
  • the access panel is hinged on the opposite side of the panel.
  • the bolt rotates open once a predetermined load is achieved against the spring mechanism.
  • FIG. 1 shows a view of a latch attached on a pressure relief panel.
  • FIG. 2 shows a perspective view of a dual purpose latch in the closed position.
  • FIG. 3 shows a side view of a dual purpose latch with regards to the pressure relief panel in the closed position.
  • FIG. 4 shows a top view of a dual purpose latch in the closed position.
  • FIG. 5 shows a front view of a dual purpose latch in the closed position.
  • FIG. 6 shows a cross-sectional view of a dual purpose latch in the closed position.
  • FIG. 7 shows a cross-sectional view of a dual purpose latch with a clutch trigger pressed.
  • FIG. 8 shows a perspective view of a dual purpose latch with a clutch trigger pressed.
  • FIG. 9 shows a cross-sectional view of a dual purpose latch with a clutch trigger pressed and latch fully opened.
  • FIG. 1 0 shows a perspective view of a dual purpose latch with a clutch trigger pressed and latch fully opened.
  • FIG. 1 1 shows a cross-sectional view of a dual purpose latch with latch partially opened during a pressure relief event.
  • FIG. 1 2 shows a perspective view of a dual purpose latch with latch partially opened during a pressure relief event.
  • FIG. 1 3 shows a cross-sectional view of a dual purpose latch with latch fully opened during a pressure relief event.
  • FIG. 1 4 shows a perspective view of a dual purpose latch with latch fully opened during a pressure relief event.
  • FIG. 1 5 shows a perspective view of an alternative dual purpose latch in the closed position.
  • FIG. 1 6 shows a side view of the alternative dual purpose latch with regards to the pressure relief panel in the closed position.
  • FIG. 1 7 shows a cross-sectional view of the alternative dual purpose latch in the closed position.
  • FIG. 1 8 shows a side view of the alternative dual purpose latch with a clutch trigger pressed.
  • FIG. 1 9 shows a cross-sectional view of the alternative dual purpose latch with a clutch trigger pressed.
  • FIG. 20 shows a perspective view of the alternative dual purpose latch with a clutch trigger pressed.
  • FIGs. 21 -23 show side, cross-sectional, and perspective views of the alternative dual purpose latch with a clutch trigger pressed and in open position.
  • FIGs. 24-26 show side, cross-sectional, and perspective views of the alternative dual purpose latch in full open position with a clutch trigger pressed and blade locked.
  • FIGs. 27-29 show side, cross-sectional, and perspective views of the alternative dual purpose latch with pressure relief load applied to swivel head.
  • FIGs. 30-32 show side, cross-sectional, and perspective views of the alternative dual purpose latch fully opened with a clutch trigger in closed position.
  • Coupled shall be understood to include direct mechanical connections, indirect mechanical connections through one or more intermediary components, such that a mechanical force, a toque or a movement can be transmitted or transferred from one component to other component(s), no matter whether there are intermediary components.
  • the present example provides a dual purpose pressure relief and panel access latch that is of a simple cost effective and when used as a pressure relief latch functions over a wide range of pressures.
  • aircraft's fuselages and /or engine nacelles utilize access panels for maintenance, avionics access, etc. These access panels are mounted in a similar fashion as the pressure relief panels, with the securing function being provided by simple button or other kinds of simple latches.
  • a housing mounted to an access panel includes a spring mechanism loaded against a bolt component that transmits the spring mechanism load to the bolt strike area/plate.
  • This strike area is normally part of the sub structure around the access panel.
  • the access panel is hinged on the opposite side of the panel.
  • the bolt rotates open once a predetermined load is achieved against the spring mechanism. As the load working between the spring mechanism and the bolt is high, man ual opening /release of the bolt is not desirable. Consequently, a manual release mechanism is attached to the spring mechanism that allows the bolt to rotate open by pushing a trigger.
  • FIG. 1 shows a typical application of a pressure relief, or panel access latch 1 02.
  • a pressure relief panel or access panel 1 01 may be included in an airframe (not shown).
  • the panel 1 01 may include a latch 1 02 mounted therein.
  • the Panel 1 01 also includes a hinge or its equivalent 1 03 coupling the panel 1 01 to the airframe (not shown).
  • the latch 1 02 typically engages the aircraft fuselage in a strike area 1 04.
  • the latch comprises a spring mechanism loaded against a bolt component that transmits the spring mechanism load to the bolt strike area/plate.
  • the access panel 1 01 is hinged on the opposite side of the panel.
  • the latch 1 02 may be opened either manually or when a predetermined load is achieved against the spring mechanism.
  • the details of the latch structure and operation mechanism are descri bed below in Figs. 2- 1 4.
  • FIG. 2 shows a perspective view of the dual purpose latch
  • FIG. 3 shows a side view of the dual purpose latch with regards to the pressure relief panel in the closed position
  • FIG. 4 shows a top view of the dual purpose latch
  • FIG. 5 shows a front view of the dual pu rpose latch
  • FIG. 6 shows a cross-sectional view of a dual purpose latch.
  • the latch 1 02 comprises a housing 21 0 and a bolt 2 1 8 pivotably mounted to the housing 2 1 0 around a bolt pivot 222.
  • the housing 21 0 has a flange 21 3 with mounting holes 2 1 2 so that the housing 21 0 may be mounted to an access panel 1 01 .
  • a panel contact 220 is attached to a distal end of the bolt 21 8 via an adjustable screw 21 9.
  • the panel contact 220 touches the secure area 1 05 when the latch 1 02 is in the close position. Furthermore, the panel contact 220 is pushed against the area 1 05 by a spring mechanism to prevent the access
  • the panel contact 220 is adjustable by rotating the adjustable screw 21 9 to accommodate gap distance variation between the bolt and the secu re area 1 05.
  • the panel contact 220 is a swivel head, which enables a rotatable motion freedom (swivel motion) of the panel contact to ensure proper contact against the secure area 1 05 during the opening process of the latch.
  • the manual release panel 21 6 are mounted to the housing 21 0 of the latch 1 02.
  • the manual release panel 21 6 is rigidly attached to the bolt 21 8 such that when the clutch may be opened by pivotably moving or pulling the manual release panel 2 1 6 arou nd the bolt pivot 222.
  • the clutch trigger 2 1 4 and the man ual release panel 2 1 6 are close to each other. Such layout makes it d ifficult to manually pu ll manual release panel 21 6 without pressing the clutch trigger 21 4 first, thus providi ng an additional protection to prevent the latch being opened accidently.
  • the clutch trigger 2 1 4 is pivotably connected to one end of a clutch link 254.
  • a clutch roller 256 is attached to the opposite end of the clutch link 254.
  • the latch 1 02 also comprise a load link 244 with its proximal end pivotably attached to the bolt 21 8 around a first load link pivot 240.
  • a second load link pivot 246 is attached to a distal end of the load link 244. When the clutch is in closed position, the second load link pivot 246 contacts the cl utch roller 256 firmly by a spring mechanism. The second load link pivot 246 enables a rotary movement when the clutch link 254 is pushed or pulled by the clutch trigger 21 4.
  • the pivot-roller contact layout has an advantage of movement of the clutch link 254 with minimum effort. Besides rotary movement, the second load link pivot 246 is also slidable in a load groove 248 in response to rotational movement of the bolt 2 1 8 around the bolt pivot 222 between a deployed position and a retracted position. The deployed and retracted positions of the bolt 21 8 are corresponding to the closed and open positions of the latch 1 02 respectively.
  • the housing 2 1 0 of the latch 1 02 has an opening
  • the load spri ng 232 is disposed between the load spring screw 236 and an interface cap 234, which is slidably confined with the opening 238.
  • the load spring screw 236 is threadably attached to the housing 21 0 such that the load spring 232 may be pre-tensioned at a predetermined force by threadably adjusting the load spring screw 236 to a desired position.
  • the predetermined force may be chosen according to the maxi mu m allowed pressure of the pressure release panel 1 01 .
  • a coil spring is shown in Fig. 6, one of ordinary skill in the art may understand that various other configurations, such as a gas cylinder, may also be used as a load spring. Furthermore, although the coil spring is compressed when the latch is in the close position, one with ordinary skill in the art may understand the spring may be configured in a stretched by reversely configuring the load spring screw and the interface cap. Such modifications may be implemented within the scope of this invention.
  • the load spring 232 pushes the interface cap 234, which passes the force to the clutch roller 256 and the second load link pivot 246.
  • the load link 244 is directionally positioned such that the push force (or spring load) transferred to the load link 244 is applied along an axis 270 below the bolt pivot 222. As a result, the panel contact 220 is pushed to contact the secure area 1 05 firmly and the latch 1 02 stays in the closed position.
  • a bolt spring 242 is attached to the first load link pivot 240.
  • the bolt spring 242 may be a torsion spring engaged between the manual release panel 2 1 6 and the load link 244. When the latch 1 02 is in a close position (or the manual release panel 2 1 6 is closed), the bolt spring 242 is compressed. Such config uration enables fast clutch opening movement, either manually or d ue to over pressure within the pressure release panel.
  • the bolt spring 242 has a much smaller spring constant than the load spring, such that the compressed bolt spring won't affect the clutch operation as a pressure release latch.
  • the spring load of the load spring is high, direct manual opening /release of the bolt using the manual release panel 21 6 is not desi rable or easi ly accessible (due to narrow gap between the manual release panel 2 1 6 and the clutch trigger 21 4 in the close position).
  • the manual clutch release mechanism is functioned to open the bolt man ually and easily after the clutch trigger 21 4 being pressed, such that the latch 1 02 may also be used as a regular access latch. The details of the manual clutch release mechanism are described with respect to Fig . 7- 1 0.
  • FIG. 7 shows a cross-sectional view of the dual purpose latch when the clutch trigger 21 4 is pressed ;
  • FIG. 8 shows a perspective view of the dual purpose latch when the clutch trigger 21 4 is pressed;
  • FIG. 9 shows a cross-sectional view of the dual purpose latch being fully opened with the clutch trigger 2 1 4 pressed ;
  • FIG. 1 0 shows a perspective view of the dual purpose latch being fully opened with the clutch trigger 21 4 pressed.
  • the configuration of roller- pivot contact makes it easy to allow downward movement of the clutch roller 256, even though the clutch roller 256 and the second load link pivot 246 are compressed against each other by the load spring 232.
  • the second load link pivot 246 is larger than the clutch link 254 in geometry. Therefore, when the clutch roller 256 is pushed away, the second load link pivot 246 mechan ical disengages or decouples from the load spring 232 and is therefore free from the load spring compression.
  • the clutch trigger 2 1 4 has a marker on the surface to label a preferred position to press.
  • the clutch trigger 21 4 is attached to the clutch housing 21 0 around a clutch trigger pivot 252.
  • the clutch trigger pivot 252 may also be biased to a close position by a torsion spring such that the latch 1 02 will be not opened accidently.
  • the clutch trigger 21 4 incorporates a clutch groove 258, which is used together with a bulge 259 disposed on the housing 21 0 to define allowable movement range of the clutch trigger 21 4.
  • the trigger clutch is pressed as shown in Figures 7- 1 0, one of ordinary skill in the art may understand that the trigger clutch may also be activated by pulling instead of pressing to disengage the bolt from the load spring with proper mechanical config urations.
  • the latch 1 02 may be closed from an open ing state in a certain order.
  • the clutch trigger 21 4 needs to be released back to the close position (the biased or default position) first, the manual release panel 21 6 is then pressed to compress the load spring and pivotably move the bolt into the closed position. If the manual release panel 21 6 is pressed to be in the close position, it would be very difficult, if not possible, to release the clutch trigger 21 4 back to the close position.
  • FIG. 1 1 shows a cross-sectional view of the dual purpose latch when the load spring is compressed under excessive pressure
  • FIG. 1 2 shows a perspective view of the dual purpose latch when the when the load spring is compressed under excessive pressure
  • FIG. 1 3 shows a cross-sectional view of the dual purpose latch being fully opened during a pressure relief event
  • FIG. 1 4 shows a perspective view of the dual purpose latch being fully opened during a pressure relief event.
  • the panel contact 220 When excessive pressure is built up within the aircraft's fuselages and /or engine nacelles, the panel contact 220 is pushed against to the secure area 1 05 with excessive force. Reciprocally, the secure area 1 05 pushes the panel contact 220 back with the counterforce (see Fig. 3 for reference). The counterforce is transferred to the bolt 2 1 8 and through the bolt 21 8 to the load lin k 244 as well as the clutch roller 256. The clutch roller 256 pushes the interface cap 234 to further compress the load spring 232.
  • the second load link pivot slidably moves in the load groove 248 further toward the load spring 232 , the load link 244 gradually changes it direction until the axis 270 is beyond the bolt pivot 222 , at which the counter force from the load spring (due to the compression of the spring) to the load link 244 is applied to open the bolt (instead of close the bolt).
  • the bolt 21 8 is therefore opened quickly to release the excessive pressure.
  • the compression pressure toward the load spring when the axis 270 of the load link 244 reaches the load pivot 222 is corresponding to the maxi mum tolerable pressure of the latch 1 02.
  • the latch When the inner pressure with in the aircraft's fuselages and /or engine nacelles is less than the maximum pressure, the latch may still function to remain a close position. Once the inner pressure within the aircraft's fuselages and /or engine nacelles is above the maxi mum pressure, the latch may be opened quickly, thanks for the configuration of the variable axis direction of the load link 244.
  • the dual purpose latch described in Figs. 2 - 1 4 has achieved reduced release load tolerances: it utilizes over center as well to achieve release load, but it is complex in the way the mechanism transmits this release load. Also, the mechanism is quite complex in its de-clutching functionality to allow access panel function.
  • FIG. 1 5 shows a perspective view of an alternative dual purpose latch 302 for high release load .
  • the dual purpose latch 302 may be installed in an access panel 1 01 (si milar to the dual purpose latch 1 02 shown in Fig. 1 and Fig. 3).
  • the alternative dual purpose latch 302 is in a close position as shown in Fig. 1 5.
  • FIG. 1 6 shows a side view of the alternative dual purpose latch with regards to the pressure relief panel in the closed position.
  • FIG. 1 7 shows a cross-sectional view of the alternative dual purpose latch in the closed position.
  • the latch 302 comprises a latch housing 31 0 and a bolt 31 8 pivotably mounted to the housing 31 0 around a bolt pivot 322.
  • the housing 31 0 has a flange 31 3 with mounting holes 31 2 so that the housi ng 31 0 may be mounted to an access panel 1 01 (not shown in Figs. 1 5- 1 7).
  • a panel contact 320 (such as a swivel head) is attached to a distal end of the bolt 31 8 via an adjustable screw 31 9.
  • the panel contact 320 touches the secure area 1 05 (not shown in Figs. 1 5- 1 7) when the latch 302 is in the close position. Furthermore, the panel contact 320 is pushed against the area 1 05 by a spring mechanism to prevent the access panel /pressure release panel 1 01 being accidently open under normal pressure in cowls for aircraft engines.
  • the height of the panel contact 320 is adjustable by rotating the adjustable screw 31 9 to accommodate gap distance variation between the bolt and the secure area 305.
  • the panel contact 320 is a swivel head, which enables a rotatable motion freedom (swivel motion) of the panel contact to ensure proper contact against the secure area 1 05 during the opening process of the latch.
  • a clutch trigger 31 4 and a manual release panel 31 6 are mounted to the housing 31 0 of the latch 302.
  • the manual release panel 31 6 is rigidly attached to the bolt 31 8 such that when the clutch may be opened by pivotably moving or pulling the man ual release panel 31 6 around the bolt pivot 322.
  • the clutch trigger 31 4 is positioned within the manual release panel 31 6, as shown in Figs. 1 5- 1 7. Such configuration may be advantageous to prevent the clutch trigger 31 4 to be pressed accidently.
  • the housing 31 0 of the latch 302 has an opening
  • the load spri ng 332 is disposed between the load spring screw 336 and an interface cap 334, which is slidably confined with the opening 338.
  • a cap roller 356 is attached to the interface cap 334.
  • the load spring screw 336 is threadably attached to the housing 31 0 such that the load spring 332 may be pre-tensioned at a predetermined force by threadably adjusting the load spring screw 336 to a desired position.
  • the predetermined force may be chosen according to the maximum allowed pressure of the pressure release panel 1 01 .
  • the latch 302 is configured to position the load spring screw 336 facing the bolt 31 8 and position the slidable interface cap 334 away from the bolt 31 8.
  • a coil spring is shown in Fig. 1 7, one of ordinary skill in the art may understand that various other configurations, such as a gas cylinder, may also be used as a load spring. Furthermore, although the coil spring is compressed when the latch is in the close position, one with ordinary skill in the art may understand the spring may be configured in a stretched by reversely configuring the load spring screw and the interface cap. Such modifications may be implemented within the scope of this invention.
  • the clutch trigger 31 4 is pivotably mounted to a trigger housing 31 5 at a trigger pin 352 and a trigger spring 353 may attached to the trigger pin 352 to bias the clutch trigger 31 4 toward a closed position.
  • a blade (or a trigger arm) 344 is pivotably mounted to the clutch trigger 31 4 at a blade pin 342 and a blade spring 343 may attached to the blade pin 342 to bias the blade 344 toward an extended position, which will be discussed later.
  • the trigger housing 31 5 may be integrated with the manual release panel 31 6.
  • the blade 344 has a barbed end 345 , which may extend out of the trigger housing 31 5 when the clutch trigger 31 4 is pressed.
  • the recompressed blade spring 343 and the trigger spring 353, in combination cause the barbed end 345 engaged firmly to a trigger housing surface 31 7 to keep the blade locked .
  • the blade spring 343 biases the barbed end 345 toward the trigger housing surface 31 7 and the trigger spring 353 exerts a bias force to squeeze the barbed end 345 and the trigger housing surface 31 7 together.
  • a contact roller 346 is slidably confined within a g roove 347 disposed on the trigger housing 31 5.
  • the load spring 332 pushes the interface cap 334, which passes the force to the cap roller 356.
  • the contact roller 346 is in firm contact with the cap roller 356 such that the push force (or spring load) from transferred to the contact roller 346 via the cap roller 356.
  • the contact roller 346 then pushes the barbed end 345 firmly against the trigger housing 31 5.
  • the cap roller 356 is positioned to prevent the cap roller 356 from pivotable opening movement around the bolt pivot 322. As a result, the latch 302 stays in the closed position.
  • a bolt spring 323 is attached to the bolt pivot
  • the bolt spring 323 may be a torsion spring engaged between the flange 31 3 of the latch housing 31 0 and a bolt spring pin 324 place on the bolt 31 8.
  • the bolt spring 323 is compressed.
  • the bolt spring 323 has a much smaller spring constant than the load spring 332 , such that the compressed bolt spring won't affect the clutch operation as a pressure release latch.
  • the spring load of the load spring 332 is high ; direct manual opening /release of the bolt 31 8 using the manual release panel 31 6 is not desi rable or easily achievable.
  • the manual clutch release mechanism is functioned to open the bolt manual ly and easily after the clutch trigger 31 4 being pressed , such that the latch 302 may also be used as a regular access latch. The details of the manual clutch release mechanism are described with respect to Fig. 1 8-20.
  • FIGs. 1 8-20 show a side view, a cross-sectional view, and a perspective view of the alternative dual purpose latch with a clutch trigger pressed respectively.
  • the blade 344 moves downward and cause the barbed end 345 extended out of the trigger housing 31 5. Since the barbed end 345 is largest area in size of the blade 344, once the barbed end 345 extends out, the contact roller 346 may slide within the groove 347 away from contact with the cap roller 356 such that the cap roller 365 no longer prevents pivotable open movement of the contact roller 346.
  • the latch housing 31 0 has a trigger g roove 31 1 disposed in a position to receive the barbed end 345 when the clutch trigger 31 4 is pressed.
  • a trigger g roove 31 1 disposed in a position to receive the barbed end 345 when the clutch trigger 31 4 is pressed.
  • FIGs. 21 -23 show side, cross-sectional, and perspective views of the alternative dual purpose latch with a clutch trigger pressed and in open position.
  • FIGs. 24-26 show side, cross-sectional, and perspective views of the alternative dual purpose latch in full open position with a clutch trigger pressed and blade locked.
  • the recompressed bolt spring 323 hel ps to pop-up the manual release panel 31 6 and the trigger housing 31 5. Furthermore, once the barbed end 345 extends out, the recompressed blade spri ng 343 and the trigger spring 353, in combination, cause the barbed end 345 engaged firmly to a trigger housing surface 31 7 to keep the blade locked.
  • FIGs. 27-29 show side, cross-sectional, and perspective views of the alternative dual purpose latch with pressure relief load applied to swivel head.
  • FIGs. 30- 32 shows side, cross-sectional, and perspective views of the alternative dual purpose latch fully opened with a clutch trigger in closed position.
  • the panel contact 220 is pushed against to the secure area 1 05 with excessive force.
  • the secure area 1 05 pushes the panel contact 320 back with the counterforce (see Fig. 3 for reference).
  • the counterforce is transferred to the bolt 31 8 and through the bolt 31 8 to the contact roller 346 as well as the cap roller 356.
  • the cap roller 356 pushes the interface cap 334 to further compress the load spring 332.
  • the manual release panel 31 6 and the trigger housing 31 5 are pivotably opened gradually to a position wherein the contact roller 346 and the cap roller are aligned to an axis 360 of the load spring 332 , at which the load spring 332 is compressed the most and a maximum pressure load of the latch 302 is reached.
  • the latch 302 may still function to close after the pressure is gone. Once the inner pressure within the aircraft's fuselages and /or engine nacelles is above the maximum pressure, the latch may be opened quickly.
  • the roller-roller contact config uration also ensures that the latch 302 may be quickly opened once a pressure above the maxi mu m pressure load is reached.
  • the dual purpose latch may be used as a pressure relief latch only without the some components, such as clutch trigger, the clutch link and the clutch roller, etc.
  • the configuration of the variable axis direction of the load link would still provide an advantage to quick release excessive pressure within the aircraft's fuselages and /or engine nacelles, or any other space subject to high pressure build up.
  • the dual purpose latch can be constructed with various configurations. For example a dual purpose latch may comprise different combi nation of components other than disclosed in the

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Mechanical Operated Clutches (AREA)
  • Superstructure Of Vehicle (AREA)

Abstract

Cette invention concerne un verrou à double usage. Le verrou peut être actionné comme un verrou de libération de pression ou un verrou de panneau d'accès. Le verrou à double usage comprend un boîtier monté sur un panneau d'accès. Un mécanisme à ressort disposé à l'intérieur du boîtier est armé contre un composant de goupille qui transmet la charge du mécanisme à ressort à la région de poussée de la goupille. Cette surface de poussée fait normalement partie de la sous-structure autour du panneau d'accès. Le panneau d'accès est monté à charnière sur le côté opposé du panneau. La goupille pivote en position ouverte lorsqu'une charge prédéterminée a été exercée contre le mécanisme à ressort. Du fait que la charge s'exerçant entre le mécanisme à ressort et la goupille est élevée, l'ouverture manuelle directe de la goupille n'est pas facilitée. Un mécanisme de débrayage manuel est fixé au mécanisme à ressort qui permet à la goupille de pivoter en position ouverte en poussant une gâchette d'embrayage.
PCT/US2017/014480 2016-01-22 2017-01-22 Verrou à double usage Ceased WO2017127776A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201662281949P 2016-01-22 2016-01-22
US62/281,949 2016-01-22
US201662330052P 2016-04-29 2016-04-29
US62/330,052 2016-04-29

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WO2017127776A2 true WO2017127776A2 (fr) 2017-07-27
WO2017127776A3 WO2017127776A3 (fr) 2017-09-08

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3907140A1 (fr) * 2020-05-05 2021-11-10 Rohr, Inc. Systèmes et procédés de poignée de verrouillage haute visibilité
US20220042348A1 (en) * 2020-08-07 2022-02-10 Sacs Aerospace Gmbh Latch

Family Cites Families (6)

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US6913297B2 (en) * 2003-10-27 2005-07-05 Hartwell Corporation Rotary latch mechanism
DE102006024203B4 (de) * 2005-05-24 2013-08-29 Mitsui Kinzoku Act Corp. Sperreneinrichtung und Einrichtung zum Steuern eines Öffnens/Schließens einer Tür
FR2991669B1 (fr) * 2012-06-11 2014-07-11 Lisi Aerospace Verrou a crochet
HUE033299T2 (en) * 2014-02-16 2017-11-28 Qrp Inc Press release latch

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EP3907140A1 (fr) * 2020-05-05 2021-11-10 Rohr, Inc. Systèmes et procédés de poignée de verrouillage haute visibilité
US11773623B2 (en) 2020-05-05 2023-10-03 Rohr, Inc. Systems and methods for high visibility latch handle
EP4464601A3 (fr) * 2020-05-05 2025-01-01 Rohr, Inc. Systèmes et procédés pour poignée de verrou à haute visibilité
US20220042348A1 (en) * 2020-08-07 2022-02-10 Sacs Aerospace Gmbh Latch
US12559970B2 (en) * 2020-08-07 2026-02-24 Sacs Aerospace Gmbh Latch

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