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| Number | Title | Issue Date |
| 6968645 | Sliding service window In accordance with one embodiment of the present invention, a sliding, bi-parting, service window may be operated by pressing on a push operator. In response to such push operation, a pair of bi-parting windows may be caused to slide apart sufficiently to provide a ... | 11/29/2005 |
| 6363666 | Safety device for preventing a skylight from being opened from outside The invention relates to a device for preventing insertion from the outside of instruments that could pivot the control bar situated on the inside of the skylight. The device is constituted by a box and two narrow strips positioned in an offset manner so ... | 04/02/2002 |
| 6361430 | Balanced ventilation doors A pair of door-sections make up a mine ventilation door. The door-sections are hinged to the side-walls of the passage. One of the door-sections opens upstream and the other downstream, so one is blown open, and the other blown closed, by winds passing th... | 03/26/2002 |
| 6009666 | Door opening and closing mechanism A door opening and closing mechanism, wherein a swinging door to cover an opening for loading, unloading, or exchanging discs comprises two doors, an upper door (14) and a lower door (13), each of which is supported by pivots (14a) and (13a). The opening ... | 01/04/2000 |
| 4733498 | Fast food service access window with segmented push-bar An access window for use in fast food establishments and other similar drive-thru business establishments is disclosed. The window broadly comprises an elastic operating mechanism, two planar window members and a segmented articulated push-bar operator wh... | 03/29/1988 |
| 4702037 | Service window The service window is constructed from a universal extruded framing member which can be cut to any desired window dimensions. A bell crank linkage with hip actuator or either of the pair of handles can be used to swing both doors open simultaneously about... | 10/27/1987 |
| 4498603 | Vending machine comprising at least one drum A vending machine comprising at least one drum pivotably mounted about a vertical shaft comprises a front pane permitting the customer to view the articles contained in the drum. In order to increase the utilization of the compartments of the drum and the... | 02/12/1985 |
| 4494586 | Safety device for a locking and opening system The invention relates to a safety device for an interlocking mechanism between two sealed enclosures such as found in biological or nuclear environments and which prevents accidental opening of one or the other of two doors closing off the enclosures, whi... | 01/22/1985 |
| 4433505 | Swinging plug door A plug door for a vehicle, such as a railway carriage, is carried and driven by a swinging lever which has a sliding fulcrum mechanism the effect of which is to flatten the arc through which the door is carried. The edge of the door which trails in an ope... | 02/28/1984 |
| 4397115 | Overhead door An overhead door for use in selectively blocking large openings such as aircraft hangar doors, warehouse doors, etc. The door includes a primary or main door member pivotally mounted to the door opening and one or more secondary door members pivotally mou... | 08/09/1983 |
| 4337695 | Filter press with pivoting diverter doors The filter press includes pressing members for pressing the liquid out of a slurry of a solid in a liquid to form a solid cake. The pressing members are then separated to drop the cake through open diverter doors. The pressing members are washed after the... | 07/06/1982 |
| 4296872 | Delivery box assembly for merchandising machine An improved delivery box assembly for a merchandising machine in which a door biased by gravity to a position at which it closes the delivery box opening is adapted to be pushed inwardly to rotate a pair of cranks carrying pins which ride in slots formed ... | 10/27/1981 |
| 4164106 | Skylight A double insulated, ventilating skylight for a building or the like, comprising inner and outer substantially co-extensive frames, each of the frames having at least one substantially rectangular vertical wall and an upwardly directed window panel, the ve... | 08/14/1979 |
| 3953940 | Counterforce assembly for doors A counterforce assembly is described for use with doors that are exposed to high pressure differentials on the two sides thereof which result in large forces acting on the doors which tend to maintain the same closed against a door jamb and make the same ... | 05/04/1976 |
