Class 16/53 - Cam

Subclass of Class 16 - Miscellaneous hardware
Definition: Devices having cam-operating means for the pistons.
No. of patents: 32
Last issue date: 09/09/2008

Number	Title	Issue Date
7421761	Door closer A door closer comprises a spindle journaled in a housing and connected to turn with a door. Upon rotation of the spindle, a cam carried by the spindle effects linear movement of a slide assembly relative to the housing. A piston is connected with the slide assembly....	09/09/2008
7331435	Continuously blockable arresting device A continuously blockable arresting device includes a housing and a shaft having an end received in the housing and which may be externally acted upon causing rotation thereof. The housing has a fluid-filled working space and two subchambers which can be connected to...	02/19/2008
7240603	Valve A piston assembly for a door closer includes a piston formed with a mounting hole and a door closer valve installed with clearance in the mounting hole. The door closer valve has a body part with first and second formations at opposite respective ends of the body pa...	07/10/2007
7007341	Door closer A door closer includes a closer casing, a pivot unit, and a length-variable damping cylinder. The pivot unit includes a pivot axle, a cam member, and a cam follower member. The pivot axle has a drive end portion that extends into and that is retained rotatably in th...	03/07/2006
7007342	Door closer The present invention relates to a door closer, in a housing of which is received a sliding cylinder, the sliding cylinder is provided with teeth on an outer periphery thereof for meshing with a gear wheel of a door shaft, a sliding cylinder interiorly formed with i...	03/07/2006
7003847	Door closer A door closer comprising a housing, a member for driving engagement with a door, the member being rotatable relative to the housing in a door opening direction and in a door closing direction, a spring apparatus within the housing providing a resilient bias, the res...	02/28/2006
6823561	Magnetic type floor hinge A magnetic type floor hinge installed on a door, comprising an installing bracket, a moving plate, a compressing spring, a longitudinal hole in the moving plate, a main shaft cam in contact with the longitudinal hole. The main shaft cam is rotatably connected to a h...	11/30/2004
6510586	Door closer Door closer with a spring system that must be stretched when the door is open and supplies the closing moment necessary to close the door. There is provided a gear train between the spring system and the door to influence the force curve which varies over...	01/28/2003
6442795	Damper for a pivot door A damper for a pivot door has a piston movably received inside the damper and having a first channel and a second channel respectively and selectively communicating with a space full of hydraulic oil, such that the movement of the piston is able to be slo...	09/03/2002
6434788	Door closer The invention describes a door closer with an energy storage that includes a resisting spring (3), with a closer shaft (1) driven by the resisting spring (3) and with an hydraulic fluid damped damping device (12, 13), whereby the energy storage and the da...	08/20/2002
5901412	Top-mounted door closer A door closer actuated by an eccentric cam plate includes a one-piece piston that is displaced axially by the rotation of the eccentric cam plate. The one-piece piston includes a damping piston portion located axially on one side of the eccentric cam plat...	05/11/1999
5832561	Automatic door closer and process for assembly of same An automatic door closer has a piston assembly dividing a housing into two pressure medium chambers. The piston assembly is moveable by a cam roller in camming engagement with a cam that rotates during an opening or closing movement of a door. The piston ...	11/10/1998
5829097	Hold open control for a door closer A blocking device for preventing a door closer from achieving a degree of rotation corresponding to a door hold-open position. A blocking device is provided which can be selectively protruded into a door closer housing to block the translation of a cam pl...	11/03/1998
5802670	Door closer A door closer with an adjustable springiness has an adjusting screw located inside the pressure chamber and at the same time inside the pressure spring....	09/08/1998
5680674	Device for controlling the movement of a wing A door closer comprises a housing (21) in which a compression spring (23) urges a piston (22) in one direction, an operating spindle (18) in the housing defining an axis (19) about which an arm mechanism (52) connected to the housing is angularly movable ...	10/28/1997
5666692	Adjustable power closure A door closer having a spindle and cam arrangement for driving a cam plate longitudinally within a housing filled with oil, and dual rods connected to the cam plate at one end and to two pistons respectively at an opposite end. The pistons are reciprocal ...	09/16/1997
5417013	Overhead door closer with slide rail for concealed installation in door panels or door frames A door closer having a slide rail linkage and capable of being essentially fully concealed upon installation in either a door panel or door frame, has a housing in which is mounted a closer shaft. The closer shaft has a first end projecting from the housi...	05/23/1995
5337448	Method of swinging a pivoted door to a selected position and cam and follower mechanism for use in the method A door closer has a cam and follower mechanism for transmitting movement between a spring and an operating member which is connected with a door. Guide elements for the cam follower can be adjusted relative to a housing to adjust the orientation relative ...	08/16/1994
5222277	Intermittently and reversibly operable hot wax energized hinge A powered hinge powered by a hot wax linear actuator, which can provide for bi-directional rotation of the hinge as the consequence of sequential and intermittent energizing and deenergizing sequence of the actuator....	06/29/1993
5050268	Door closer with back checking means An improved door closer is provided which has a back checking arrangement including a loosely held resilient cushion bar which is engaged by a metallic shield abutting sliding cam plates during a final few degrees of opening of a door to provide an increa...	09/24/1991
4847946	Hydraulic door closer A new type of hydraulic door closer is disclosed. The device of the present invention utilizes spring force and hydraulic pressure, and is equipped with a straightly extending arm instead of the conventional type of the folding arms. The advantages of the...	07/18/1989
4785493	Door check A door check wherein a housing is affixed to the pivotable panel and a guide rail is affixed to the frame of a door. The housing contains a shaft which is rigidly connected with one end of an arm the other end of which is slidably guided by the rail. The ...	11/22/1988
4773125	Door closer A link is pivotally connected at one end thereof to one end of a case or main body of a door closer so that the link is turnable between a first position where it is received in the case and a second position where it is put outside the case. A roller is ...	09/27/1988
4763384	Door closer and check In a door closer, there are provided a vertical rotatable shaft associated with the rotation of a door through an arm, two cams installed integral with the shaft, an urging device for rotating the door in the closing direction through one of the cams and ...	08/16/1988
4744125	Door closer transmission including an eccentric pinion A door closer is described in which transmission characteristics which change in dependence on the closing angle can be realized either by two pistons disposed coaxially within one another and displaceable relative to one another, or by eccentric toothed ...	05/17/1988
4663800	Holding device for door closers A door holding device for door closers is described in which a door is held only at a predetermined angle of opening and in which the selected holding position can remain unchanged over a long period of time but can nevertheless be released by electrical ...	05/12/1987
4658468	Door check A door check wherein a housing is affixed to the pivotable panel and a guide rail is affixed to the frame of a door. The housing contains a shaft which is rigidly connected with one end of an arm the other end of which is slidably guided by the rail. The ...	04/21/1987
4483043	Automatic door closer An automatic door closer has an elongated fluid-filled housing having a closed end and an opposite open end, a plug closing the open end of the housing, a first piston reciprocatably arranged in the housing and dividing the latter into a first pressure sp...	11/20/1984
4376323	Automatic door closer An automatic door closer comprises a closer shaft connected to a door for turning therewith and being turnably mounted in the region of one end of an elongated fluid-filled housing. A cam disk fixed to the closer shaft cooperates over rollers carried by a...	03/15/1983
4358870	Hydraulic hinge with door closing mechanism A hydraulic hinge, which can close automatically a door and firmly hold the door at a certain open position without any conventional door closer or door checking device, comprises a casing, a seat having a hexagonal opening therein, a buffer hydraulic mec...	11/16/1982
4349939	Automatic door closer An automatic door closer in which a piston operatively connected to the door to be moved in axial direction during turning of the door in either direction from a closed to an open position divides the fluid filled housing of the door closer into two press...	09/21/1982
4064589	Door closer Disclosed herein is a device for closing swinging doors which is mounted in a door frame and has an elongated housing with a spindle rotatably mounted in one end thereof by which the door closer is secured to a door. A cylinder is interiorly formed in the...	12/27/1977

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Class 16/53 - Cam