Browse Prior Art Database

Cam-controlled Flapper Closure Mechanism

IP.com Disclosure Number: IPCOM000241380D
Publication Date: 2015-Apr-21
Document File: 1 page(s) / 20K

Publishing Venue

The IP.com Prior Art Database

Abstract

The purpose of this invention is to eliminate the interference at the heel location of the flapper and flapper seat seal interface of a hinge type flapper mechanism. The invention uses a cam and follower to translate the flapper into the flapper seat seal interface instead of rotating it as is with most of current designs. This motion of translating then rotating is intended to improve the seal performance of the flapper mechanism. A Flapper Closure Mechanism that is actuated via a cam and follower mechanism. The initial motion of the Flapper would be vertical (i.e., parallel to the centerline axis of the valve). The rest of the motion would be to rotate the Flapper into open position. The closing motion would be in reverse of the opening motion. The important feature here is the final movement (i.e., right before the Flapper seats with the Flapper Seat) which is parallel to the centerline of the valve. The intent of this idea is to eliminate the interference at the ”heel“ location of the Flapper Mechanism as the Flapper closes against the Flapper Seat. Due to the motion of the Flapper, standard Torsion Springs would be replaced with either one or two compression or extension Springs depending on the packaging and overall fit-up within the Flapper Mechanism. The Springs would be attached to the Flapper Pin located inside or outside of the hinge area in the Flapper Base. The Springs would exert a closing force to keep the Flapper closed. The Flapper Pin has two cylindrical Cam Followers, one on each side of the Flapper Pin, protruding from the each end. The OD of the Flapper Pin slides only vertically in a size matching guide slot in the Flapper Base. Each of the Cam Followers slides inside a specially designed path (i.e., cam) that rotates the Flapper Pin as it moves vertically. Since the Flapper Pin, the Cam Followers and the Flapper cannot have relative motion to each other; the Flapper opens or closes as it is stroked vertically.

This text was extracted from a Microsoft Word document.
This is the abbreviated version, containing approximately 74% of the total text.

Cam-controlled Flapper Closure Mechanism

The purpose of this invention is to eliminate the interference at the heel location of the flapper and flapper seat seal interface of a hinge type flapper mechanism. The invention uses a cam and follower to translate the flapper into the flapper seat seal interface instead of rotating it as is with most of current designs. This motion of translating then rotating is intended to improve the seal performance of the flapper mechanism.

A Flapper Closure Mechanism that is actuated via a cam and follower mechanism.  The initial motion of the Flapper would be vertical (i.e., parallel to the centerline axis of the valve).  The rest of the motion would be to rotate the Flapper into open position.  The closing motion would be in reverse of the opening motion.  The important feature here is the final movement (i.e., right before the Flapper seats with the Flapper Seat) which is parallel to the centerline of the valve.  The intent of this idea is to eliminate the interference at the ”heel“ location of the Flapper Mechanism as the Flapper closes against the Flapper Seat.  Due to the motion of the Flapper, standard Torsion Springs would be replaced with either one or two compression or extension Springs depending on the packaging and overall fit-up within the Flapper Mechanism.  The Springs would be attached to the Flapper Pin located inside or outside of the hinge area in the Flapper Base.  The Springs would exert a closing force to ke...