Abstract: A step-plate mechanism is provided for a door-opening/closing device that is powered by the downward movement of a step plate caused by a stepping force of a pedestrian, with the step plate being disposed on a floor at both the front and back of a door as seen by a pedestrian, including a return mechanism is provided to bias the step plate, which moves downward by the stepping force of the pedestrian, to return to its original position after the pedestrian passes.

Abstract: A gate apparatus includes a frame that is approximately in a shape of a letter “U”, a gate that opens forward or backward, a rotational support device that supports the gate so that the gate rotates and moves upward relative to the frame, a locking device that locks the gate at a closed position, and a pedal device that unlocks the locking device. The pedal device includes a pair of pedals on the both sides of the gate, and a push-up member that is linked to the pair of pedals. The push-up member includes a push-up surface that tilts when the pedal is operated. The push-up surface tilts so that the push-up surface moves upward and comes in contact with the gate on the side closer to the pedal that has been operated, and applies a push-up force and a rotation force to the gate.

Abstract: A self-closing entry system includes an entrance, a base support member located at one side of the entrance, a bearing arrangement attached to the base support member, a gate surface member pivotably mounted to the base support member, a bumper assembly defined by at least one bumper frame member pivotably fastened to the gate surface member at a gate fulcrum, at least one bumper contact element fastened to the at least one bumper frame member, and wherein the at least one bumper contact element is capable of axial rotation about the at least one bumper frame member, a counter-balance assembly extending from the first bumper frame member to the second bumper frame member, and a means for latching the gate system, allowing the gate surface member to move in one direction upon activation of a latching control means.

Abstract: A door opening and closing device for a slide door, which can be horizontally open and close the slide door by application of a light load and which can be constructed and maintained at low costs. The door opening and closing device has a transmission mechanism for converting through a lever (31) the amount of settlement of a tread plate (21) placed on floor surfaces at positions in front and back of the slide door (12), into a predetermined displacement amount. The tread plate (21) is weight-wise balanced such that the transmission mechanism and settlement of the tread plate due to the weight of an adjustment weight (W) causes the tread plate (21) to float through the lever (31). Up-down movement of the long transmission member (32) presses a drive rotation body (42) to an open door rail (41), and a component force of the pressing force allows the slide door (12) to be opened by application of a light load.

Abstract: A gate opening system which includes a barrier and a barrier mounting adapted to mount the barrier in an open or closed condition, a retention device to secure the barrier in an open or closed condition, a drive element, and an energy transmission system, whereby energy is transferred from the weight of a vehicle and is in turn transmitted through the transmission system to rotate the drive element, causing the barrier mounting to be lifted, the disengagement of the retention device, and the barrier thereby opened or closed.

Abstract: A foot operated door opener is formed as a triangular frame. The frame has an angular apex joint opposite the longer leg. The apex has an axle therethrough which is rotatably connected to a wall adjacent a sliding door. Pressure on the end of one leg of the frame causes rotation of the frame about the axle. The rotation causes another end of the frame to engage the sliding door and move it laterally to partially open the door.

Abstract: A foot pedal door opener device for use with a reach-in commercial cabinet, having a mounting bracket and retaining clip that allow the foot pedal to be mounted in a desired position for a left or right side opening door. The mounting bracket has at least two holes in a top portion of the bracket body to retrofit or mount the bracket to an outer surface of the cabinet. The retaining clip is configured to be aligned with either one of the holes of the bracket body. A connector passes through the retaining clip and corresponding hole of the bracket and penetrates the outer surface of the cabinet to secure the retaining clip to the bracket body and the mounting bracket to the cabinet. The pedal engages a rotating member that connects the pedal to the mounting bracket such that when a user depresses the pedal, the pedal rotates toward the user around the rotating member, whereby an engaging head of the pedal pushes the cabinet door open.

Abstract: A method of increasing the range of controlled movement of a door opened by a treadle operated door opening assembly is described, along with a treadle operated door opening assembly constructed in accordance with the teachings of the method. The method includes the step of mounting a contact member which projects from the first face of the door adjacent to the hinge edge and the bottom edge. With this modification when a person treads upon a radially extending pedal a shaft rotates causing a point of contact between the arm and the door to move sequentially from a first position substantially parallel to the first face of the door to a second position engaging the contact member substantially perpendicular to the first face of the door.

Abstract: A pet portal for use on a door, with an opening cut in it, permitting a pet, such as a cat or a dog, to enter a house without having to have anyone open the door for them. The pet portal includes a horizontal panel mounted on a slidably mounted vertical panel. The horizontal panel extends both inside and outside the door with an actuating means for pulling the horizontal panel and the vertical panel up to the top of the opening in the door so that the vertical panel covers the opening in the door. Both the vertical and horizontal panels slide downwardly against the actuating means when a pet steps on the horizontal panel either inside or outside of the door.

Abstract: The prevent invention is directed to improvements in vending machines of the type having an access door which is opened by a purchaser for removing a purchased article from within the machine.A two-stage hydraulic door closer is provided with a spring to return the access door through its arc of movement from the open to the closed position at a relatively slow, controlled, substantially uniform rate which allows a purchaser to open and release the door and then to remove an article from the interior of the vending machine with one hand without interference by the access door while the article is being removed.

Abstract: A ramp-operated mechanical gate system, including vertically-swinging gate, sliding gate and side-swinging gate embodiments which utilize collapsible ramps to supply energy to open a gate so that the gate is opened automatically when the collapsible ramp is depressed by an approaching vehicle and is closed automatically when the vehicle drives through the gate and the ramp is no longer depressed.

Abstract: A door operator with a reciprocable rack gear adapted to be actuated in opposite directions by an electric motor driven screw and a coaxial helical compression spring for rotating a drive gear of a door operating spindle in opposite directions for opening and closing a swinging door, the rack gear forming part of a spindle operator having lateral bearings engageable with the ends of the spindle and adapted to be mounted in either of two 180.degree. angularly spaced positions about the axis of the drive screw for rotating the spindle in opposite directions, and the coaxial compression spring being operable via the rack gear for biasing the spindle in both directions to an intermediate position thereof.