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Class 16/69 - Spring and gear


Subclass of Class 16 - Miscellaneous hardware
Definition: Devices in which the closing devices include springs and
No. of patents: 12
Last issue date: 04/15/2008


NumberTitleIssue Date
7356878Door closer
A door closer includes an anchor assembly for mounting on a door frame, an actuator assembly for mounting within the thickness of a door which is hinged for movement between open and closed positions, an operating member coupled by a linkage to the anchor assembly a...
04/15/2008
6886217Door closer
A door closer having a pair of main driving springs, a fluid-filled damper arrangement and a pair of thrust springs is provided, the thrust springs coming into effect during the latter part of a door closing operation, so as to provide an augmented closing force at ...
05/03/2005
6317922Door closer
A door closer includes a cylinder and a piston sliding along the cylinder with a piston rod extending from the cylinder, with the closer mounting at one end to the door and at a second end to the door frame. The door closer has a speed adjustment know ext...
11/20/2001
6047440Non-rotating pinion cap
A non-rotatable pinion cap for use on a non-handed door closer where both ends of the drive pinion extend beyond the cylinder body. The pinion cap has one exposed edge for engaging the door or door frame surface and includes a christmas tree plug for atta...
04/11/2000
5943736Door closer
A door closer includes a casing-like body enclosing a piston member, which is movable back and forth according to the movements of a door and is in cooperation with at least one closer spring, and a closer shaft and a pinion member connected thereto for t...
08/31/1999
5309676Balanced door closing apparatus
A door closer is shown, which is installed between a door and a door frame, in a balanced door. The door closer is installed in a header of the door frame, and includes an operative connection to a hinge shaft upon which upper and lower door support arms ...
05/10/1994
5267356Commode seat lowering apparatus
A lowering apparatus is arranged to include a commode seat arranged for biased displacement from a first orientation oriented at an obtuse included angle relative to the commode to a second position at an acute orientation relative to the commode, whereup...
12/07/1993
4979261Variable position door closer
Disclosed is a door control device that automatically repositions the driving shaft of the door closer toward and away from the door pivot, as the door opens and closes, as a means of modifying and improving the force required to open and close the door. ...
12/25/1990
4414703Door closer and holder
A door closer and holder has cylinders with pistons therein responsive to the relative swinging motion between a door panel and a door frame. A spring is loaded by door opening and acts against one piston to effect door closing. Various hydraulic passages...
11/15/1983
4369545Double action door closure mechanism
A pinion 9 attached to a door meshes with two parallel racks 10, 11 which face each other. A piston 14, connected by rods 29 to a rotatable lever 25 of a restoration assembly 4 which has a return spring 26 and a shock absorber 27, has an L-shaped pivotabl...
01/25/1983
4083080Door closer
A device for controlling the movement of a door has a pinion rotatably connected to the door, a rack meshingly engaging with the pinion and connected to a spring device for storing a force therein when the door is moved from its neutral position, and an e...
04/11/1978
3934307Spring adjustment mechanism
An adjustable spring loading mechanism for use in controlling the movement of doors and the like. The mechanism includes a cylinder housing and a piston slideable within the housing. A plurality of biasing means are arranged in the housing in engagement w...
01/27/1976
 
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