Fluid Pressure Lock Patents (Class 70/DIG48)
  • Patent number: 5799514
    Abstract: A handcuff includes a pair of arcuate cuff bow arranged to encircle a human wrist. A locking mechanism on one of the cuff bows releasably engages the other bow to secure the bows around a wrist. A fluid actuated cylinder coupled to the locking mechanism releases the locking mechanism when pressurized fluid, such as air, is applied. The fluid actuated cylinder avoids the use of keys, resulting in a more enclosed structure that is more difficult to pick than prior key-based mechanisms. Use of the fluid actuated cylinder further improves security by making ordinary handcuff keys, which are frequently possessed by or available to prisoners, ineffective to open the handcuffs.
    Type: Grant
    Filed: March 25, 1997
    Date of Patent: September 1, 1998
    Assignee: American Handcuff Co.
    Inventors: Thomas H. Tobin, Jr., Norbert J. Kot
  • Patent number: 5685578
    Abstract: A door locking mechanism for use with a door having a door latch assembly and a stationary catch includes a locking rod movable between a locking position and a release position. In its locking position, the locking rod extends into aligned passages formed in a latch member and a stationary catch member of a door latch assembly, which are engaged with each other in a latched position to maintain the door in a closed position. This prevents disengagement of the latch member from the catch member, to prevent opening of the door. In its release position, the locking rod is withdrawn from at least the latch member passage, to enable the latch member to be disengaged from the catch member and to allow opening of the door. The locking rod is interconnected with a piston disposed within a cylinder. A spring urges the piston toward a position placing the locking rod in its locking position.
    Type: Grant
    Filed: September 25, 1995
    Date of Patent: November 11, 1997
    Assignee: Versa Technologies, Inc.
    Inventor: Robert H. Schneider
  • Patent number: 4907429
    Abstract: A remote controlled door lock apparatus is provided for use in connection with a conventional door lock. The apparatus includes a solenoid operated element for mounting on the door and for connection to the door lock, and a remote control element for connection to the solenoid element for remotely locking and unlocking the door lock.
    Type: Grant
    Filed: December 21, 1987
    Date of Patent: March 13, 1990
    Inventors: Kenneth Davis, Norman Anderson
  • Patent number: 4773242
    Abstract: A deck lid latch has a rotatable clock cylinder accessible through an escutcheon having a pivotally mounted cover. A detent is effective upon movement of the cover to the open position to hold the cover in the open position. The detent is released in response to rotation of the lock cylinder so that the cover is moved to the closed position by a bias spring. A gear is rotatably mounted on the escutcheon and has gear teeth meshing with gear teeth displayed on the cover in an arcuate path about the pivot axis of the cover so that pivotal movement of the cover rotates the gear. A viscous damper is associated with the gear to retard rotary movement of the gear and thereby retard the closing movement of the cover in a time delayed fashion which gives the operator time to withdraw the key and his fingers from proximity with the spring biased cover prior to the cover reaching the closed position.
    Type: Grant
    Filed: February 17, 1988
    Date of Patent: September 27, 1988
    Assignee: General Motors Corporation
    Inventor: Dennis E. Smith
  • Patent number: 4647089
    Abstract: A bolt of a dead bolt lock is moveable between a locking position and an ocking position by application of a pressurized fluid. In both the locking and unlocking positions a plurality of locking balls are urged into locking engagement with a locking groove and are maintained in such locking engagement by a resiliently urged locking cam without the necessity for maintaining the pressurized fluid once the required condition is attained. Application of the pressurized fluid unlocks the bolt, displaces it to its alternate position and locks it in place.
    Type: Grant
    Filed: June 21, 1984
    Date of Patent: March 3, 1987
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Roy A. Zangrando
  • Patent number: 4620735
    Abstract: A door-bolting device for electrical appliances, in particular washing machines, comprises a longitudinally displaceable slide bolt having a locking opening for a door-locking hook, one or two bolting openings for engagement by a bolting rod, and a lock-down recess. In open position, the free end of a signal contact spring enters this lock-down recess; this spring and a fixed contactor member opposite and parallel with the former constitute a signal contact unit. During bolting operation, a signal contact is made in this unit and controls a bolt-actuating relay comprising a magnet yoke, a coil, a core and a double-armed magnet armature lever. The free end of a bolting arm of the latter constitutes a bearing for the bolting rod which is displaced, during bolting operation, by a swivel motion of the lever. The end of a main contact arm of the same lever serves as bearing for a connecting shaft which is fastened to a diaphragm subdividing a pressure chamber.
    Type: Grant
    Filed: June 11, 1985
    Date of Patent: November 4, 1986
    Assignee: Ellenberger & Poensgen GmbH
    Inventor: Konrad Heydner
  • Patent number: 4601183
    Abstract: A pneumatically-operated unlocking system suitable for use on the door of a igh security building such as a military weapons storage structure, in which each one of a pair of unlocking keys is provided with a different combination of holes and no holes arranged in an n-position pattern to define an n-bit binary code. An encoder outside of the building pneumatically reads the said binary codes on the two unlocking keys in sequence and transmits the resulting pneumatic binary codes through conduits in the building walls to a logic device inside thereof where the binary codes are compared to two n-bit reference pneumatic binary codes derived from a pair of reference keys located inside of said building. If the codes on the two unlocking keys match those on the reference keys, a pneumatic output is produced which can be used to unbolt the door from the building.
    Type: Grant
    Filed: June 21, 1984
    Date of Patent: July 22, 1986
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Roy A. Zangrando
  • Patent number: 4465311
    Abstract: The present disclosure provides a fluid controlled door lock including a lock chassis, a lock bolt movable relative to the chassis, a door handle rotatable relative to the chassis along an axis, a clutch for interconnecting the lock bolt and the door handle, and a fluid control system operable in a direction substantially parallel to the axis and being connected to the chassis for operating the clutch. The fluid control system typically includes a cylinder having a fluid displaceable plunger therein which is adapted to selectively reciprocate in a direction parallel to the axis to operate the clutch.
    Type: Grant
    Filed: October 19, 1981
    Date of Patent: August 14, 1984
    Inventor: George K. Austin
  • Patent number: 4353230
    Abstract: A fluid-actuated locking device for the doors of dwellings or offices or for armored doors having a plurality of tubes for the flow of a fluid supplied from a reservoir, which fluid may either be pressurized to operate a lock or may flow back through the tubes after the release of the pressure so as to allow the locking of the door; a presettable combination is provided to predetermine whether fluid will flow through the tubes thus allowing operation of the lock to unlock the door, numbers or letters being provided and usable in the presettable combination; the fluid is subjected to pressure by a pump to effect withdrawal of pistons from the locking once the preset combination has been set to the preselected combination; the fluid is fed to the lock by a valved manifold which also controls the back flow of the fluid from the lock to the reservoir and works in association with the presettable combination to unlock or lock the door; and locking of the door is accomplished by the action of springs in the lock an
    Type: Grant
    Filed: July 23, 1979
    Date of Patent: October 12, 1982
    Inventor: Renato Cacioni
  • Patent number: 4266415
    Abstract: A door lock, in particular a lock for hotel room doors. Actuation of the exterior door handle creates a supply of compressed air which is directed through a coding assembly to actuate a lock release member. The operation of the coding assembly is controlled by a pair of matching punched cards. One of the cards is normally positioned within the lock and the other card is retained by an authorized user for insertion into the lock to operate the coding assembly. Two separate coding assemblies are provided with a hotel door lock, one being for use by a guest and the other under the control of the hotel management.
    Type: Grant
    Filed: August 6, 1979
    Date of Patent: May 12, 1981
    Inventor: Walter W. H. Clarke
  • Patent number: 4033161
    Abstract: A fluidic logic circuit is used to control access to a secured area by receiving pneumatic signals from a fluidic signal input transducer determining whether or not specific coded input requirements have been met. When all inputs to the signal input transducer are correct the fluidic logic circuit applies fluidic signals to valving which in turn provides fluid power to pneumatically operated latching devices. When one or more incorrect inputs from the signal input transducer are received by the fluidic logic, a dual signal is initiated by the fluidic logic which shuts off the power supply valve and prevents opening of the pneumatic latch.
    Type: Grant
    Filed: March 1, 1976
    Date of Patent: July 5, 1977
    Inventor: Michael J. Goes
  • Patent number: 3973418
    Abstract: A releasable, reusable, tamperproof device for attaching an anti-theft monitor to an article of merchandise is disclosed. The attachment device includes a tack adapted to be passed through the monitor and the article and into a keeper. The keeper encloses a one-way fastener of the type having opposed legs defining surfaces for gripping the pointed shank of the tack. Compression of the opposed legs to a releasing position permits withdrawal of the tack. In accordance with one embodiment, the keeper includes openings through which rotatable key means are insertable for engaging and displacing the legs to the tack-releasing position. In another embodiment the keeper incorporates flexible diaphragms dividing the keeper into a pair of side chambers separated by a central chamber enclosing the one-way fastener. Pressurization of the side chambers deflects the diaphragms into engagement with the fastener legs and causes displacement thereof to the tack-releasing position.
    Type: Grant
    Filed: March 31, 1975
    Date of Patent: August 10, 1976
    Assignee: Mrs. Lawrence Israel
    Inventor: Leo R. Close