Patent US4365442A successfully refreshed from Google Patents.
US4365442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic door control system
Assignee: Chase Industries Inc
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Filing: 1980-09-24
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Granted: 1982-12-28
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Expires: 2000-09-24
Abstract
Abstract An automatic door operating system includes a gas operated linear motor connected to operate a door by means of a unidirectional linkage system including an arm for unidirectional engagement of the door and a control system including a source of compressed gas for selectively opening the door and for controlling the duration of the door open position. The control system includes a variable timing release for variable timing of the duration of the valve opening. The actuator for the system can be remotely positioned for maintaining the door in open position for sufficient duration to permit passing therethrough. The linkage system permits the door to be manually operated totally independent of the operating system.
Inventors
- 👤 Harold A. Speer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:37
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/50; E05F15/53; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
128 words
A fluid powered door opening system for a door moveable between an open position and a closed position, the combination comprising: a mounting bracket for mounting in a fixed position adjacent a door; a linear fluid motor pivotally mounted on said bracket; an arm pivotally mounted on said bracket for extending parallel to the face of a door and connected to said fluid motor for unidirectional engagement with and application of force to the face of a door for moving the door in a direction away from said fluid motor to an open position; a source of pressurized fluid for powering said motor; and a control system for selectively communicating said pressurized fluid to said fluid motor for operation thereof for moving a door to the open position.
Claim 2
Dependent Claim
128 words
A fluid powered door opening system for a door moveable between an open position and a closed position, the combination comprising: a mounting bracket for mounting in a fixed position adjacent a door; a linear fluid motor pivotally mounted on said bracket; an arm pivotally mounted on said bracket for extending parallel to the face of a door and connected to said fluid motor for unidirectional engagement with and application of force to the face of a door for moving the door in a direction away from said fluid motor to an open position; a source of pressurized fluid for powering said motor; and a control system for selectively communicating said pressurized fluid to said fluid motor for operation thereof for moving a door to the open position.
Claim 3
Dependent Claim
44 words
The door opening system of claim 1 wherein said arm is pivotally mounted at one end for movement about an axis parallel to the axis of the door; and a roller mounted on the other end of the arm for engagement with said door.
Claim 4
Dependent Claim
14 words
The door opening system of claim 2 wherein said fluid is a pressurized gas.
Claim 5
Dependent Claim
41 words
The door opening system of claim 3 wherein said control system comprises; a solenoid valve for selectively directing pressurized gas to said motor and for automatically venting said gas from said motor; and a remotely positioned actuator for actuating said valve.
Claim 6
Dependent Claim
23 words
The door opening system of claim 4 wherein said control system includes variable timing means for adjusting the duration of said valve opening.
Claim 7
Dependent Claim
22 words
The door opening system of claim 4 in combination with a door closer for closing said door when released by said opener.
Claim 8
Dependent Claim
28 words
The door opening system of claim 6 in combination with a door mounted for swinging movement from a closed position to an open position about a vertical axis.
Claim 9
Dependent Claim
55 words
The door opening system of claim 7 including a bracket mounted above said door, said arm is pivotally mounted on said bracket and extends for pivotal movement with said door to the open position; and said motor having a cylinder pivotally mounted on said bracket and having a piston rod pivotally connected to said arm.
Claim 10
Dependent Claim
48 words
The door opening system of claim 2 wherein said arm extends at an angle substantially parallel to the face of the door; and the linear motor is an elongated fluid motor extending with its reciprocating path at an angle of between 2 and 8 degrees with said arm.
Claim 11
Dependent Claim
35 words
The door opening system of claim 9 wherein the push rod of said motor is connected to said actuating arm by means of a connecting arm extending at substantially right angles to the push rod.
Claim 12
Dependent Claim
63 words
The door opening system of claim 10 wherein said actuating arm and said fluid motor are pivotally mounted on a common bracket and the relative positions of the pivot points are such as to maintain an angle of between 2 and 8 degrees between said arm and said motor in all positions between an opened position and a closed position of said door.
Claim 13
Dependent Claim
46 words
The combination of claim 7 wherein the fluid motor is a piston and cylinder combination with said piston pivotally mounted to a bracket adjacent said door and extending substantially parallel to said actuating arm with an angle of between 2 and 8 degrees with respect thereto.
Claim 14
Dependent Claim
52 words
The combination of claim 12 wherein the piston and cylinder is connected at the outer end of the piston rod to said actuating arm by means of an L-shaped bracket that has a length less than the distance between the pivot point of the cylinder to said bracket and said lever arm.
Claim 15
Dependent Claim
40 words
The combination of claim 8 wherein said arm extends parallel to said door in the opened position and the closed position and said motor and piston rod extending substantially parallel to said arm at an angle of about 5 degrees.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-27 | 1986-06-28 | 1986-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-27 | 1990-06-28 | 1990-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-27 | 1994-06-28 | 1994-12-28 | $7700.00 | Window Closed / Lapsed |