Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 7900398 | Security door system A revolving security door includes a drum defining a secure zone between door openings controlled by a revolving door disposed within the drum and wherein light curtain sensors and active infrared sensors may detect an intruder moving from a non-secure side of the d... | 03/08/2011 |
| 7895791 | Passage barrier with a sensor technology for detecting the presence of a person inside the passage barrier A passage barrier includes at least one barrier element that can be swivelled around a swivelling axis inside a swivelling area; at least one sensor technology that detects the presence of a person in the swivelling area and that comprises at least one sending unit ... | 03/01/2011 |
| 7841133 | Passage barrier A passage barrier (10) with two barrier elements (24, 26) and two mutually aligned shafts (16, 20) which are separate from each other and can be driven by separate motors (14, 22), whereby one barrier element (24, 26) is retained o... | 11/30/2010 |
| 7703241 | Security gate A security gate for controlling passage of personnel through an accessway to or from a controlled-access region, the security gate including: (a) a first support structure deployed on a first side of the accessway; (b) a second support structure deployed on a second... | 04/27/2010 |
| 7401438 | Revolving door for placement in a facade of a building A revolving door for placement in a facade of a building to provide an entrance and exit to the building, comprising a rotation axis and door leaves mounted on the rotation axis, placed between cylinder segment-like shell elements, wherein the shell elements compris... | 07/22/2008 |
| 7146994 | Active rinse shield for electrofill chemical bath and method of use An active rinse shield designed to protect electrofill chemical baths from excessive dilution during rinse sprays on the semiconductor wafer. The shield uses overlapping blades to cover the bath, making a physical barrier between the bath chemistry and the wafer rin... | 12/12/2006 |
| 7104008 | Door system with a pair of door panels connected by a swivel panel that swings back and forth for selectively opening and closing gateways in a compartment A door system has a compartment formed with a first gateway and a second gateway opposed to the first gateway, and a barrier apparatus housed in the compartment. The barrier apparatus includes a swivel panel which swings back and forth between a first position where... | 09/12/2006 |
| 7096625 | Method of displaying advertising on a turnstile A method of advertising includes providing a transparent, tubular sleeve within which a sheet carrying advertising is placed and removably attaching the tubular sleeve to one of the arms of a turnstile. ... | 08/29/2006 |
| 7048312 | Safety mechanism for walk-in interiors, particularly for cooking devices A walk-in chamber has a door opening closable by a door, which, when in the closed position can be either in a locked position or an unlocked position, dependent on the locking device, which includes a sliding bolt engageable with a locking bolt. To enable a person ... | 05/23/2006 |
| 7040836 | Turntable barrier system A barrier system for use with a trafficable surface that penetrates a boundary to control access by vehicles and to permit uncontrolled access by pedestrians. The system includes a turntable providing a surface that is rotatable generally in the plane of the traffic... | 05/09/2006 |
| 7021002 | Sliding revolving door A revolving door comprising an at least partly cylindrical shell wall, which has an entrance and an exit, and two rotating door leaves, which during normal operation are in place extended in the opposite direction of each other inside the shell wall. Between the she... | 04/04/2006 |
| 6959949 | Device for securing a door leaf against unintentional deflection A driven part can be pivotably mounted to the door frame so that, in a starting position, it engages a driving part fixed to the leaf frame in order to fix the position of the door leaf with respect to the door frame. An electromagnetic brake generates a moment to r... | 11/01/2005 |
| 6925756 | Apparatus for controlling the ingress and egress to and from an operator's compartment The ingress to and egress from an access restricted compartment, such as the cockpit in an aircraft, is controlled by a revolving gate (1) rotatably mounted in a stationary gate frame (2). The revolving gate (1) has a single gate opening (11 | 08/09/2005 |
| 6742301 | Revolving door with metal detection security A revolving door has a metal detection function. A metal detector will detect a predetermined sufficient amount of metal. The door will not allow a user with such a sufficient amount of metal to pass through. One also cannot pass a gun or other metal object through ... | 06/01/2004 |
| 6725603 | Emergency exit revolving door An emergency exit revolving door apparatus includes a revolving door assembly that is generally comprised of a ceiling panel, a floor panel, and a pair of curved vertical panels extending therebetween to form a rigid, conjoint assembly. The revolving door assembly i... | 04/27/2004 |
| 6715234 | Turnstile entry gates A turnstile entry gate comprising at least two, at equiangular distances on an arm carrier (5) mounted barrier arms (2-3), the arm carrier (5) being by way of a remote-controlled barrier device (6) arranged to permit or to prevent turning... | 04/06/2004 |
| 6557299 | Revolving door A revolving door has driven door panels, which are movably positioned around a central rotating element. Each pair of door panels has an individual drive. The driving speed for each door panel is chosen on the basis of the position taken by said door pane... | 05/06/2003 |
| 6543185 | Revolving door A revolving door (1) comprising at least two operating sashes (2, 3) and at least three arc-shaped side walls (4, 5, 6), arranged opposite one or several entrance passages (7, 8) or exit passages (9, 10) at the drum periphery. The door is characterised in... | 04/08/2003 |
| 6493991 | Revolving door system A revolving door system includes outer walls (2) disposed in parallel with a doorway in a building. A hollow center core (3) having a racetrack-shaped cross-section is disposed between the outer walls, whereby passageways are defined by the lower surface ... | 12/17/2002 |
| 6370822 | Revolving door A revolving door has driven door panels, which are movably positioned around a central rotating element. Each pair of door panels has an individual drive. The driving speed for each door panel is chosen on the basis of the position taken by said door pane... | 04/16/2002 |
| 6367198 | Revolving door with night surround This invention relates to a revolving door with a plurality of door panels which can be rotated around a central axis inside a cylindrical barrel wall that surrounds them. The invention teaches that one of the door panels or parts thereof can be detached ... | 04/09/2002 |
| 6350407 | Process for producing sintered product A method of manufacturing a sintered compact is disclosed herein. The method comprises the steps of: (1A) producing a green body containing metal powder, for example, by means of metal injection molding (MIM); (2A) compacting the green body by pressing it... | 02/26/2002 |
| 6266922 | Revolving door A revolving door with a ceiling drive beam that is integrated into the ceiling construction, whereby the ceiling construction consists of two circular segments. The ceiling drive beam is located between the segments and is continuous over the inside diame... | 07/31/2001 |
| 6155744 | Parking management system A parking lot management system including a plurality of parking space barriers each having a vertical member and an arm having an inboard end rotatably mounted to the vertical member. In use, the arm is adapted for pivoting about a vertical axis at least... | 12/05/2000 |
| 6073394 | Door system A door system is driven by a motor. The door wings of this door system are guided by rollers (27) on a rail (10) secured in a door frame construction. The driving motor (30) of each door wing is secured onto an operating mechanism receiving the roller (27... | 06/13/2000 |
| 6061960 | Revolving door A revolving door has opposed vertical sidewalls defining a passage space, opposed passage openings, and a door assembly including a vertical central axis and a plurality of door wings extending outwardly from the central axis. The opposed vertical sidewal... | 05/16/2000 |
| 6012252 | Turning blocking device A turnstile with a housing, a drive and a locking element with a barrier arm is set in motion following verification of the access authorization of a user wishing to pass, rotating the barrier arm from its blocking position into a position out of line of ... | 01/11/2000 |
| 5937580 | Power transmitting device for doors and the like A power transmitting arrangement for doors, preferably revolving or swinging doors with door leaves (30) moving in a circular path inside lateral portions (33), is useful for both driving and braking the door. Between a stationary element (K1) and a relat... | 08/17/1999 |
| 5711111 | Revolving door lock A revolving door lock is positioned on an inner space of the building and is sealed to the outside so that no heat energy is lost for nothing and hardly no draught appears. There is no need for three or four wings at the individual revolving doors so that... | 01/27/1998 |
| 5592778 | Safety turnstile A turnstile is disclosed which is easily adapted to operate in either a clockwise or counterclockwise direction of rotation and which does not permit reverse rotation during operation. Resistance to rotation in the reverse direction is achieved by means o... | 01/14/1997 |
| 5542211 | Revolving security door for banks and the like A revolving security door for the controlled passage of persons from a non-protected environment to a protected environment, for example a bank, which permits the normal transit of persons even in the event of the interception of an unwelcome person, incl... | 08/06/1996 |
| 5444941 | Mantrap A mantrap in which a demarcation in shape of a segment of an arc is provided at one side of a passage. The open side of the demarcation faces the other side of the passage. The demarcation extends, furthermore, along a predetermined angle of circumference... | 08/29/1995 |
| 5376041 | Method for regulating the flow of animals through a slaughtering facility A turntable means regulates the flow of animals, for example, ratites (includes ostrich and emu) through a slaughtering facility. The turntable means has a circular turntable rotating about an axis within a circular perimeter wall. The perimeter wall has ... | 12/27/1994 |
| 5357711 | Support bar for turnstile arms A revolving door construction includes an elongated pivot column and a plurality of spaced barrier members arranged in at least one row wherein a first end of each of the barrier members is secured to the pivot column. A support bar is spaced from the piv... | 10/25/1994 |
| 5345715 | Serpentine structure for a turnstile The invention is a turnstile gate with a serpentine configuration instead of conventional protruding arms. Both the stationary and revolving gates are formed of a continuous configuration of pipe which loops back and forth with substantial straight sectio... | 09/13/1994 |
| 5235783 | Revolving door A revolving door with a passage space (3) enclosed by a housing (1) in which the door panels (4) are mounted onto a central rotatable support (5). One or more sensors (6) are present which, at the presence of an object within a certain distance of a door ... | 08/17/1993 |
| 5203111 | Revolving door for the protection of the access to and/or exit from a room A revolving door for the protection of the access to and/or exit from a room is provided with a revolving shaft having a number of door wings spaced evenly around it, a pair of panels at opposite ends bordering on the path followed by the door wings and f... | 04/20/1993 |
| 5201906 | Anti-piggybacking: sensor system for security door to detect two individuals in one compartment A control system for a revolving door includes an ultrasonic sensor having multiple sensor heads. The door has a housing and multiple movable compartments formed by door wings. The sensors emit energy waves into the housing in bursts, then receive echoes ... | 04/13/1993 |
| 5201142 | Revolving door A revolving provided with a number of door wings which can be driven with the aid of a drive mechanism. This comprises a chain running in a substantially horizontal plane along a number of chain wheels in an essentially polygonal path and operatively enga... | 04/13/1993 |
| 5195448 | Security system An anti-armed robbery system is provided wherein persons enter and exit an establishment through a plurality of floor to ceiling extending walls and lockable doors made of bullet resistant materials forming a completely enclosed bullet resistant vestibule... | 03/23/1993 |
