Movable or removable closures – Mounted for multidirectional or oblique movement – In plane of closure; e.g. – oblique
Patent
1998-01-23
1999-10-26
Redman, Jerry
Movable or removable closures
Mounted for multidirectional or oblique movement
In plane of closure; e.g., oblique
49228, E05B 1506
Patent
active
059706570
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention is directed generally to an automatic door adapted for retail sales of products through a driveup door. Particularly, the present invention relates generally to automatic door closers of the inclined track type. This invention relates to serving doors, and more particularly, to serving doors and similar openings installed in drive through or walkup facilities such as fast food restaurant to facilitate exchange between a customer and the business without exposing the server or the interior space unnecessarily to inclement weather, insects, and other such problems. Such doors are usually mounted in the wall of a facility at a height which will put the server in convenient reaching distance from a customer seated in a vehicle, and are commonly used for fast food restaurants and other businesses with drive through service.
BRIEF DESCRIPTION OF THE PRIOR ART
Automatically actuated door arrangements have been known in use ill the past. Usually, these devices have relied on the application of a physical force to mechanically slide open the doors. Others utilize swinging doors which pivot outwards. Still others utilize magnetic materials to actuate movement of the doors.
However, problems have been encountered with certain aspects of the prior art devices. The present invention is drawn to an automatic sliding door on an inclined plane operated under the effects of gravity in combination with a self locking device.
BRIEF SUMMARY OF THE INVENTION
The nature of the invention is a door which rides on an inclined track so that it closes due to gravity by sliding down the inclined track. The door locks automatically when closed by the coupling of a hooked door latch with a cooperative hooked base latch.
The door opens by a lateral force being applied to the door latch thereby disengaging the locking means and providing for the sliding of the door up the inclined track. The door travels the distance up the inclined track commensurate with the degree of force supplied to it. Upon release, the door slides down the inclined track under the force of gravity. The door then meets a stopping point and reengages with the locking means to lock closed once again.
The purpose of the single sliding access door is to provide a self closing and self locking door for use in the fast food industry to free the hands of the employee to handle the objects being passed through the opening of the door and to provide for safe, effective, and absolutely positive closing of the door area without any input from the operator.
An object of the invention is to provide an automatic closing door which does not utilize electrical energy.
A further object of the invention is to provide a self closing door to free the operator to do other things and to assure closure of the door without operator input.
A further object of the invention is to provide a self locking door to free the operator to do other things and for better security.
DETAILED DESCRIPTION OF THE DRAWINGS
FIG. 1 is a cross section of the header, track, and door of the invention.
FIG. 2 is an enlarged view of the header, sill, and side frame of the invention.
FIG. 3 is a front view of the latching mechanism.
FIG. 4 is a top view of the door latch.
FIG. 5 is a side view of the latch plate of the door latch.
FIG. 6 is a rear view of the door latch.
FIG. 7 is a front view of the invention in the latched position.
FIG. 8 is a side view of the door latch showing the gap.
DETAILED DESCRIPTION OF THE INVENTION
FIG. 7 illustrates an access door (7) attached to a wall (23). The door (7), as shown in FIG. 1, has a mounting flange (22), protruding from the top of the door. The mounting flange (22) is a long slender protrusion from the door (7) utilized in attaching the door (7) to the roller block (2) which rides oil a "G" shaped track (1). The "G" shaped track (1) is mounted inside the wall (23) wherein the access door assembly (25) is to be installed. The track and header complex (26) are installed within an opening of corresponding siz
REFERENCES:
patent: 2989302 (1961-06-01), Clark
patent: 3074124 (1963-01-01), Bergstedt
patent: 3805450 (1974-04-01), Forcina
patent: 4646471 (1987-03-01), Shaiu
patent: 5165142 (1992-11-01), Pilsbury
patent: 5572830 (1996-11-01), Freeman
Ready Access, Inc.
Redman Jerry
LandOfFree
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