Piston Tube Patents (Class 104/156)
  • Patent number: 10835832
    Abstract: A gap covering system for an amusement park attraction includes a loading platform having a gap separating a first portion of the loading platform from a second portion of the loading platform. The gap covering system includes a ride vehicle coupled, through the gap, to a transport. The transport is configured to propel the ride vehicle along a loading path of the loading platform. The gap covering system includes a magnetic zipper positioned adjacent to the loading platform and configured to transition between a first configuration and a second configuration in at least a portion of the magnetic zipper. The magnetic zipper is configured to cover the gap in the first configuration and is configured to allow the ride vehicle to occupy a guest-accessible position on the loading platform in the second configuration.
    Type: Grant
    Filed: November 22, 2019
    Date of Patent: November 17, 2020
    Assignee: Universal City Studio LLC
    Inventors: Maria Cariota Fontiveros Penso, Rachel Sarah Wilcox, David Gerard Majdali
  • Patent number: 10730702
    Abstract: A floor conveyor has a conveyed object support base portion supported on a conveying traveling body via a columnar support member that penetrates, in a vertical direction, a slit formed in a floor surface along a traveling path of the conveying traveling body. An auxiliary floor surface mechanism which narrows the width of the slit has protruding members protruding from the side of the slit to the center of the slit, where each of the protruding members includes a plate-shaped portion along a perpendicularly vertical direction and is held and biased by an elastic force in a protruding posture in which the protruding member protrudes to the center of the slit. When the protruding member contacts the columnar support member, the protruding member moves in the movement direction of the columnar support member against elasticity so as to allow the passage of the columnar support member.
    Type: Grant
    Filed: October 19, 2017
    Date of Patent: August 4, 2020
    Assignee: Daifuku Co., Ltd.
    Inventors: Kazuaki Fukushima, Shotaro Kamiya, Yoshikazu Hirokari, Yoshitaka Ikeda
  • Patent number: 9988214
    Abstract: A radius conveyor comprising a sideflexing conveyor belt and a touchless magnetic bearing at the inside of a turn. The conveyor belt has electrically conductive elements in a side edge. An array of permanent magnets along the conveyor's side rail at the inside of the turn produces a permanent magnetic field. As the conveyor belt is driven through the turn, the permanent magnet field induces currents in the electrically conductive material. The currents produce reaction magnetic fields opposed to the permanent magnetic field that result in a radially outward force pushing the conveyor belt away from frictional contact with the side rail. Alternatively, permanent magnets in the side edge of the belt and electrically conductive elements in the conveyor's side rail likewise provide a magnetic bearing.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: June 5, 2018
    Assignee: Laitram, L.L.C.
    Inventor: Bryant G. Ragan
  • Patent number: 9534288
    Abstract: A deposition apparatus includes: a transfer unit including a first transfer unit and a second transfer unit, wherein the first transfer unit transfers, in a first direction, a moving unit to which a substrate is detachably fixed, and the second transfer unit transfers, in an opposite direction of the first direction, the moving unit from which the substrate is separated, and a deposition unit including a deposition assembly wherein the deposition assembly deposits a material on the substrate spaced apart from the deposition assembly while the first transfer unit transfers the substrate which is fixed to the moving unit, wherein the first transfer unit includes a first support unit that supports both ends of the moving unit in the first direction, and a second support unit that supports a side of the moving unit opposite to a side close to the deposition assembly.
    Type: Grant
    Filed: August 28, 2013
    Date of Patent: January 3, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Young-Mook Choi, Jong-Won Hong
  • Patent number: 8468949
    Abstract: Provided is a tube railway system that reduces noise and air resistance using a sealed evacuated tube as a passage for a tube railway, thereby allowing a train to run at a higher speed. A vacuum division management system and a vacuum blocking screen device for a tube railway system required to maintain vacuum are provided, in which the vacuum blocking screen device is operated to rapidly block a passage for a tube railway in response to an operation signal, is installed at every certain section or at a designated section of the tube railway, and is operated in a specific section when a vacuum maintenance problem occurs, or when the vacuum needs to be released, or when the train needs to stop immediately, thereby allowing the specific section to be isolated from other sections to have a degree of vacuum different from those of the other sections.
    Type: Grant
    Filed: February 8, 2010
    Date of Patent: June 25, 2013
    Assignee: Korea Railroad Research Institute
    Inventors: Sam-Young Kwon, Hyung-Chul Kim, Dong-Wook Jang, Yong-Hyeon Cho, Hyung-Woo Lee, Chan Bae Park
  • Patent number: 8146508
    Abstract: A pneumatic mass transportation system employs a combined cycle turbine power system with digital controls to effect acceleration, deceleration and train propulsion. Combustion turbines can be adapted to use alternative fuels including bio fuels as they are developed. A heat recover steam generator recycles hot exhaust gasses from turbines to generate electricity to be used by the system. A multi-car train is propelled by differential air pressure forward and aft of the vehicle in a pneumatic tube. Air propulsion is achieved by large in-tube impellers driven by the turbines. A digital control system controls turbine speed, pitch of impeller blades and vacuum/pressure release valves in the tubes to maneuver and control the train.
    Type: Grant
    Filed: October 1, 2009
    Date of Patent: April 3, 2012
    Inventor: Patrick Joseph Flynn
  • Patent number: 8006625
    Abstract: The present invention provides a new personal transport system for passengers and goods, which comprises: a tube car comprising a self-powered closed tube car carrying passengers or goods from door to door; and a network of tubes comprising a plurality of tubes, the said network of tubes combined with the existing blocks or buildings, with each tube in the network of tubes provided with an upper rail and/or a lower rail for supporting and/or guiding the said tube car carrying passengers or goods. According to the invention it is possible to achieve a door-to-door transport between two buildings. In comparison to other traffic systems, the inventive system's velocity, line capacity, safety and reliability, ability of resisting disasters and comfortableness are much increased while its consumption of energy, construction cost, occupied space, operating cost, noise and visual pollution are greatly reduced.
    Type: Grant
    Filed: April 14, 2006
    Date of Patent: August 30, 2011
    Inventor: Nanzheng Yang
  • Publication number: 20040079257
    Abstract: A vehicular linear propulsion system for use along a track, comprising: a tubular drive line (3) divided lengthwise into a plurality of mutually-sealed sectors connected end-to-end by sector gate air valves (SG); at least one main supply pipe running adjacent, preferably parallel, to the drive line for the supply of air to the drive line or the evacuation of air from the drive line; at least two main air valves (V1, V2 or P1, P2) near respective ends of each sector for selective communication with the main supply pipe; and two exhaust air valves (I1, I2 or E1, E2) near respective ends of each sector for selective communication with the atmosphere for exhausting air or taking air in.
    Type: Application
    Filed: September 3, 2003
    Publication date: April 29, 2004
    Inventor: Thomas John Scott Tidmarsh
  • Patent number: 6708623
    Abstract: An improved support structure capable of supporting a guideway in the form of a tube or tubes which may in turn carry a train for travel thereupon, which elevated guideway is capable of passing over existing right-of-ways, rolling or mountainous terrain, and rivers of moderate size. The improved support structure provides a uniform vertical thermal expansion and uniform loading deflection (due to the weight of a passing train) thus assuring that the elevated tubes are smooth and straight.
    Type: Grant
    Filed: August 13, 2002
    Date of Patent: March 23, 2004
    Inventor: Richard D. Cummins
  • Patent number: 6644209
    Abstract: An all-weather guided vehicle system having a guideway including a single tube or a pair of parallel tubes capable of storing pressurized air. Vehicles are suspended below, above, or beside the tube(s) by way of carriages to which the vehicles are connected. Arcuate roller tracks between the vehicle and the carriage provide a banking mechanism for cornering. The tube(s) support continuous high-speed rails to receive suspension members extending from the carriage for air or wheeled suspension. Impulse vanes are provided on a vertical rod extending through a slotted opening in a propulsion channel for cooperation with air jet nozzles located within the channel to propel and brake the carriage. Embodiments having a fair-weather vehicle riding atop the deck and tire tracks for suspension and prevention of side sway are also disclosed.
    Type: Grant
    Filed: December 27, 2002
    Date of Patent: November 11, 2003
    Inventor: Richard D. Cummins
  • Publication number: 20030101896
    Abstract: An improved support structure capable of supporting a guideway in the form of a tube or tubes which may in turn carry a train for travel thereupon, which elevated guideway is capable of passing over existing right-of-ways, rolling or mountainous terrain, and rivers of moderate size. The improved support structure provides a uniform vertical thermal expansion and uniform loading deflection (due to the weight of a passing train) thus assuring that the elevated tubes are smooth and straight.
    Type: Application
    Filed: August 13, 2002
    Publication date: June 5, 2003
    Inventor: Richard D. Cummins
  • Patent number: 6460466
    Abstract: The invention provides a driving device comprising a tubular housing (2) and a moving unit (4) which is positioned on the housing (2) in such a way that it can be moved lengthwise therein. Said moving unit (4) comprises an internal part which is located in the housing (2) and an external part which is located outside the housing (2), both parts being magnetically coupled. The magnetic coupling creates a coupling device which produces at least one closed magnetic circuit (13) via the outer part (6) and which fully traverses the inner part (5) and the housing (2).
    Type: Grant
    Filed: September 1, 1999
    Date of Patent: October 8, 2002
    Assignee: Festo AG & Co.
    Inventors: Kurt Stoll, Martin Maichl, Maximilian Haslinger, Thomas Reininger
  • Patent number: 6360670
    Abstract: A transportation system for moving a transportation module comprises a thrust tube and a pod assembly disposed inside the thrust tube to be thrusted along the thrust tube. An inner magnetic coupler is disposed inside the thrust tube and connected with the pod assembly to be moved by the pod assembly. An outer magnetic coupler is disposed outside the thrust tube and configured to connect with a transportation module. The outer magnetic coupler is spaced from the inner magnetic coupler by the thrust tube and is magnetically coupled with the inner magnetic coupler to be moved by the inner magnetic coupler. An inner spacing member is disposed inside the thrust tube and spaces the inner magnetic coupler from the inner surface of the thrust tube by a preset distance. An outer spacing member is disposed outside the thrust tube and spaces the outer magnetic coupler from the outer surface of the thrust tube by a preset distance.
    Type: Grant
    Filed: March 24, 2000
    Date of Patent: March 26, 2002
    Assignee: Flight Rail Corporation
    Inventor: Max P. Schlienger
  • Patent number: 6279485
    Abstract: A pod assembly is disposed inside and thrusted along a slotted tube having a longitudinal slot. The pod assembly comprises a first pod, a second pod coupled with the first pod, and a strut disposed between and coupled with the first pod and the second pod. The strut extends through the longitudinal slot of the slotted tube to the support a transportation module outside the slotted tube. In one embodiment, the first pod is a thrust pod and the second pod is a passive pod. The thrust pod includes a thrust pod tire to make contact with the interior of the slotted tube and at least one bladder which is inflatable and deflatable to modulate gas flow through the thrust pod to adjust speed of movement of the thrust pod in the slotted tube. The passive pod includes a passive pod tire to make contact with the interior of the slotted tube and includes no thrust control feature. In another embodiment, the first and second pods include pod tires for making contact with the interior of the slotted tube.
    Type: Grant
    Filed: October 1, 1999
    Date of Patent: August 28, 2001
    Assignee: Flight Rail Corporation
    Inventor: Max P. Schlienger
  • Patent number: 6267058
    Abstract: A coupling mechanism includes an inner magnetic coupler disposed inside a thrust tube and an outer magnetic coupler disposed outside the thrust tube. The inner and outer magnetic couplers are spaced by a non-metallic portion of the thrust tube. The inner magnetic coupler is movable relative to the wall in a direction of movement. The outer magnetic coupler is magnetically coupled with the inner magnetic coupler to be moved by the inner magnetic coupler. The inner magnetic coupler includes an inner magnetic bar and a plurality of inner magnetic blocks coupled to the inner magnetic bar. The inner magnetic blocks are disposed between the inner magnetic bar and the thrust tube. The inner magnetic bar is opposite in polarity from the inner magnetic blocks. The inner magnetic blocks are arranged in series and are alternately spaced by a plurality of inner nonmagnetic spacers in the direction of movement.
    Type: Grant
    Filed: March 24, 2000
    Date of Patent: July 31, 2001
    Assignee: Flight Rail Corporation
    Inventor: Max P. Schlienger
  • Patent number: 6178892
    Abstract: A transportation system uses a carrier conduit in the form of a long tube or channel in order to drive a vehicle by air pressure. A carrier having end plates obstructs the travel of air through the carrier conduit. Pressure differentials formed within the carrier conduit serve to propel the carrier through the carrier conduit. By rollably supporting the carrier within the carrier conduit, friction is reduced between the carrier conduit and the carrier. The carrier may be magnetically coupled to a vehicle having vanes and a set of track- or rail-engaging wheel assemblies on vanes. The vanes may pivot upon the vehicle and serve to allow the vehicle to rollably or slidably couple to the carrier conduit track. The motion of the carrier serves to propel the vehicle along the carrier conduit track as the vehicle is magnetically coupled to the carrier.
    Type: Grant
    Filed: September 30, 1999
    Date of Patent: January 30, 2001
    Inventor: Lou O. Harding
  • Patent number: 6170404
    Abstract: This invention has the ability to provide the initial acceleration necessary for spacecraft to attain earth orbit without use of traditional rocket propellants. The invention also has the ability to provide an alternative means of ground transportation without the direct use of fossil fuel. The invention utilizes a pressurized, nonmagnetic tube to accelerate and translate a piston. The piston is magnetically coupled to a conveyance, which travels along the outside of the tube. The conveyance, in turn, can be either a spacecraft or a vehicle suitable for ground transportation.
    Type: Grant
    Filed: December 18, 1998
    Date of Patent: January 9, 2001
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventor: Glen A. Robertson
  • Patent number: 6076469
    Abstract: The improvement in a control circuit for the operation of pneumatically propelled vehicles consists of a propulsion duct formed by a guideway (1) and power propulsion units (3) with flow control valves (4) located at intervals along the guideway (1). Atmospheric valves (2) are located at specific points along the guideway (1), opening and closing the duct to the atmosphere, and the section isolation valves (6) are positioned in such a way as to isolate adjacent blocks of the guideway (1) and at the same time to maintain the functioning of the propulsion circuit in the other blocks. The atmospheric valve (2) is coupled to an aperture (11) in the guideway (1) and consists of a butterfly valve.
    Type: Grant
    Filed: November 10, 1997
    Date of Patent: June 20, 2000
    Assignee: Aeromovel Global Corporation
    Inventor: Oskar H. W. Coester
  • Patent number: 5845582
    Abstract: An improved system for sealing a slot (37) in the guideway (13) of a pneumatic transportation system includes two separate pairs of sealing flaps for producing two separate opposed seal interfaces (47, 49) through which a travelling pylon (18) connecting a propulsion plate (17) to a vehicle (15) on the guideway can pass. A first pair of sealing flaps (43a, 43b) provides a negative pressure seal and a second pair of sealing flaps (49a, 49b) provides a positive pressure seal. The sealing flaps contact the travelling pylons along their distal ends only, so as to produce minimum deflection of the seal and minimum mechanical resistance against the pylon. The slot seal system of the invention is relatively easy to install from outside the vehicle guideway and produces no cavities in the top of the guideway in which moisture and debris can accumulate.
    Type: Grant
    Filed: November 13, 1997
    Date of Patent: December 8, 1998
    Assignee: Aeromovel Global Corporation
    Inventors: Oskar Hans Wolfgang Coester, Carlos Antonio Campani
  • Patent number: 5826701
    Abstract: A hollow guide rail 10 defining a pneumatic cylinder tube which is made up of multiple tubular members 16 connected in end to end fashion. Each tubular member 16 has a reinforcing rib 17 extending between its opposite ends, a rib-less part 24 formed on the tubular member 16 near each of its longitudinal ends by cutting away a part of the reinforcing rib 17, and a coupling rib 25 defined by the portion of the reinforcing rib 17 which remains between each rib-less portion 24 and the nearest longitudinal end of the tubular member 16 after the portions of the reinforcing rib 17 have been cut away. The tubular members 16 are connected to each other by fastening the coupling ribs 25 of adjacent tubular members 16 together with connecting plates 33 fitted over the coupling ribs and nuts and bolts 34.
    Type: Grant
    Filed: June 13, 1996
    Date of Patent: October 27, 1998
    Assignee: SMC Corporation
    Inventor: Shinya Miura
  • Patent number: 5564339
    Abstract: An article carrying apparatus for carrying an article by utilizing pressure of fluid such as compressed air, comprising a cylinder tube, a guide rail extending along the cylinder tube, a piston movable by an action of fluid pressure in said the cylinder tube, a moving piece for carrying an article supported in a manner that its movement is restricted in all directions except in an axial direction by the guide rail and movable in the axial direction along the guide rail and the cylinder tube, and a magnet coupling mounted on each of the moving piece and said piston, whereby the cylinder tube and the said guide rail are arranged as independent members and are connected each other by a connecting mechanism with a degree of freedom.
    Type: Grant
    Filed: January 25, 1996
    Date of Patent: October 15, 1996
    Assignee: SMC Corporation
    Inventors: Shinya Miura, Michikazu Miyamoto
  • Patent number: 5560300
    Abstract: To provide a railroad car design that allows the car to travel at high speeds over current roadbeds at very low fuel costs per mile a special rail is formed. This rail has the form of a wave shaped on its top with the troughs and crests of the wave repeating themselves every several feet apart continuously down both tracks for the whole distance of the railroad. When a wheel of this multi-wheeled car comes over the crest of a wave it has encountered as it moves down this wave formed track, the wheel immediately begins supporting its computer calculated portion of the weight of the car on a cushion of air pressure forced into its supporting air cylinder at that moment and rolls down the face of the wave in its desired direction of travel.
    Type: Grant
    Filed: September 26, 1994
    Date of Patent: October 1, 1996
    Inventor: John R. Schneider
  • Patent number: 5537929
    Abstract: An article carrying apparatus for carrying an article by utilizing pressure of fluid such as compressed air, comprising a cylinder tube, a guide rail extending along the cylinder tube, a piston movable by an action of fluid pressure in the cylinder tube, a moving piece for carrying an article supported in such a manner that its movement is restricted in all directions except in an axial direction by the guide rail and movable in the axial direction along the guide rail and the cylinder tube, and a magnet coupling mounted on each of the moving piece and the piston, whereby the cylinder tube and the guide rail are arranged as independent members and are connected with each other by a connecting mechanism with a degree of freedom.
    Type: Grant
    Filed: October 7, 1994
    Date of Patent: July 23, 1996
    Assignee: SMC Corporation
    Inventors: Shinya Miura, Michikazu Miyamoto
  • Patent number: 4805761
    Abstract: A conveyor system for transporting wafers to and from different work stations in a clean-controlled environment includes a platform being magnetically levitated above a U-shaped rail by a magnetic cushion provided by first magnets on the platform and the rail, the first magnets having their magnetic poles arranged to repel one another. A nonmagnetic tube within which is a free-sliding magnetic piston of the same polarity as the first magnets extends along the center of the track. A second magnet is disposed on the platform such that its polarity will repel (or attract) the piston magnet such that as the pressure differential in the tube is changed the piston magnet slidably moves within the tube and pushes (or draws) the platform along the track with it.
    Type: Grant
    Filed: July 14, 1987
    Date of Patent: February 21, 1989
    Inventor: John W. Totsch
  • Patent number: 4658732
    Abstract: A pneumatic propulsion system for passenger vehicles is constituted by a structural beam, composed of modular elements end-supported on pillars. The beam supports the trackway and provides an air duct for pneumatic propulsion of vehicles. A longitudinal slit in the top surface of the beam is sealed by flexible flaps and that press against each other to seal off the duct, while allowing for the passage of support mast. Airflow for propulsion of the vehicle is generated by a stationary airflow generator, which feeds the air propulsion duct by way of connecting ducts and which is outfitted with a set of four butterfly control valves that are controlled by a command and control system of flow and pressure condition in the duct which actuates the valves pneumatically, allowing automatic or manual selection of "suction" or "pressure" conditions in the duct.
    Type: Grant
    Filed: April 3, 1984
    Date of Patent: April 21, 1987
    Inventor: Oskar H. W. Coester
  • Patent number: 4645182
    Abstract: A conveying device more particularly suitable for use as a vertical hoist on construction sites or in industrial premises takes the form of a flexible and pliant hose-like pressure duct having a shuttle piston therein. The shuttle piston acts to seal off an internal portion of the duct and is fixed in place by way of a magnetic coupling with an external rider. The external rider is anchored in place so as to encompass the portion of the pliant duct in which the shuttle piston is located. The pliant duct is moved either up or down depending on whether fluid pressure is inserted into the duct above or below the fixed shuttle piston. By attaching a hook or the like to one end of the duct the pliant hose is capable of acting as a traction rope.
    Type: Grant
    Filed: June 28, 1985
    Date of Patent: February 24, 1987
    Inventor: Kurt Stoll
  • Patent number: 4587906
    Abstract: A system for propelling vehicles for carrying passengers or cargo comprises a longitudinal duct, having a slit at the top and a pair of rails or tracks. A vehicle is provided to run on the tracks and has a fin which projects into the duct to substantially fill the same. Differential air pressure is applied to the duct to cause the fin to move along the duct and carry the vehicle with it. The duct may include several stations with means to produce differential air pressure between the separate stations. A braking device operates to apply brakes when the pressure on both sides of the fin is substantially the same. Preferably the vehicle contains no internal control for the fin or air pressure so that it can be controlled from the outside by the device for forwarding the differential air pressure.
    Type: Grant
    Filed: September 26, 1980
    Date of Patent: May 13, 1986
    Inventor: Oskar H. W. Coester
  • Patent number: 4574705
    Abstract: An improved transportation system is provided by which vehicles may be propelled along the top of a duct on a cushion of pressurized air. The duct is provided with a grating on its upper surface through which the pressurized air is emitted from the interior of the duct, and a longitudinal slot extends along the grating. The lower surface of the grating is normally closed by a flexible belt which extends along the interior of the duct. The belt is depressed down from the grating as the vehicle moves along the top of the duct to permit air pressure in the duct to escape through the grating and thus support the vehicle on a cushion of air. At least one vane is attached to a carriage, the vane being supported on the lower end of an arm which depends from the vehicle and extends down through the slot into the interior of the duct. The vane extends across the interior of the duct. A pressure differential created within the duct on opposite sides of the vane serve to propel the vehicle along the top of the duct.
    Type: Grant
    Filed: February 27, 1984
    Date of Patent: March 11, 1986
    Inventor: Emil H. von Winckelmann
  • Patent number: 4457423
    Abstract: A conveyor system is designed for moving loads along a curved path and takes the form of a guide pipe having within it a piston-like driver which may be shuttled from one end to the other thereof by forcing driving fluid, as for example water and oil, into the one end or the other end of the pipe. A sleeve-like runner is placed on the outside of the pipe and is joined up with the driver by a magnet system which may take the form of a magnetic driving part on the driver and so placed thereon as to be radially spaced from the inner wall face of the pipe. The driver within the pipe and the runner on the pipe, together with any magnet system on them, have outer and inner forms taking into account the curved forms of the pipe.
    Type: Grant
    Filed: May 18, 1981
    Date of Patent: July 3, 1984
    Inventor: Kurt Stoll
  • Patent number: 4347791
    Abstract: A guideway system for cargo including vehicles is provided wherein a carriage glides on a rail mounted in a channel. The rail has compressed air discharge ports and vacuum intake ports positioned longitudinally therealong. The compressed air ports emit sufficient air to provide an air support cushion under the carriage and to impart positive air pressure behind it while the vacuum ports reduce the air pressure forward of the carriage to create an air pressure differential that propels the carriage along such rail. Vehicles drive onto a carriage, are secured in place and are conveyed to a desired station on such carriage. The vehicle then unloads from the carriage and drives off to its final destination. Similarly, other cargo is loaded onto a carriage and unloaded at its destination.
    Type: Grant
    Filed: January 22, 1979
    Date of Patent: September 7, 1982
    Inventor: James A. Mandros
  • Patent number: 4240599
    Abstract: A pneumatic system for launching aircraft wherein an elongated frame having pressurized interior chamber is volumetrically related and communicatively connected to a longitudinally-slotted cylinder supported within the frame so that expansion of air into the cylinder produces a desired thrust pressure therein that is equalized by the residual pressure external of the cylinder within the chamber. A piston member slidably contained within the cylinder is adapted to receive the compressed air and is connected to a shuttle for accelerating the aircraft to be launched. The shuttle is releasably restrained at the rearward end of the cylinder and is adapted to travel longitudinally through the slot which is dynamically sealed by a flexible strip as the shuttle passes through the slot to preserve thrust pressure within the cylinder.
    Type: Grant
    Filed: April 30, 1979
    Date of Patent: December 23, 1980
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Joseph Hammond
  • Patent number: 4108077
    Abstract: A rail vehicle including means for converting energy released during braking of the vehicle to a stored potential energy which may be subsequently used to impart acceleration to the vehicle. Pressure accumulators are utilized where the accumulators include a gas which is compressed by braking forces and where the heat of the compressed gas is stored in latent heat storage elements contained within the accumulators. The track upon which the vehicle rides comprises a hermetically closed tubular chamber enclosing the vehicle and which is filled with water vapor to reduce drag on the vehicle.A method of propelling a rail vehicle including the steps of recovering the brake energy produced during braking to a stop, storing this energy and then using the energy to accelerate the vehicle from the stop.
    Type: Grant
    Filed: June 9, 1975
    Date of Patent: August 22, 1978
    Inventor: Nikolaus Laing
  • Patent number: 4108079
    Abstract: A releasable stop for releasably stopping a vehicle moving through a conduit. A stop gate is supported for pivotal movement into and out of the path of movement of the vehicle. First and second arms are pivotally connected together between the gate and a support and a pneumatic piston and cylinder assembly actuates one arm for moving the gate between a closed and opened position. The pivoting arms are moved into or slightly past a dead center position when the gate is in the closed position whereby the impact of a vehicle engaging the gate will be transmitted to the support instead of to the piston and cylinder assembly. When the gate is closed, the dead center position of the arm maintains the stop gate in a locked position. The stop gate may be sized and shaped to entirely block the conduit to provide a dead end air cushion stop assist.
    Type: Grant
    Filed: November 24, 1976
    Date of Patent: August 22, 1978
    Assignee: Georgia Tech Research Institute
    Inventors: Marion R. Carstens, Homer J. Bates