Invention Grant
- Patent Title: Friction-type door check
- Patent Title (中): 摩擦式门检查
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Application No.: US3555591DApplication Date: 1968-06-25
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Publication No.: US3555591APublication Date: 1971-01-19
- Inventor: SOGOIAN NASH P
- Applicant: NASH P SOGOIAN
- Assignee: Nash P Sogoian
- Current Assignee: Nash P Sogoian
- Priority: US73988668 1968-06-25
- Main IPC: E05F3/16
- IPC: E05F3/16
Abstract:
A DOOR CHECK FORMED OF A TUBULAR HOUSING WITH SPRINGS, A FRICTION RETARDING ELEMENT, AND A CONE-SHAPED WEDGE THEREIN IN WHICH ONE END OF THE HOUSING IS PIVOTALLY HELD TO THE DOOR FRAME. A ROD EXTENDING FROM THE OTHER END IS PIVOTALLY ATTACHED TO THE DOOR. AS THE DOOR IS OPENED THE SPRING IS READILY COMPRESSED, AND AS THE DOOR IS RELEASED THE SPRING AUTOMATICALLY CLOSES THE DOOR AND AT THE SAME TIME FORCES THE WEDGE INTO THE FRICTION ELEMENT WHICH BEARS AGAINST THE INNER SURFACE OF THE HOUSING RETARDING THE CLOSING OF THE DOOR. A SECOND SPRING IS PROVIDED FOR MAINTAINING THE FRICTION RETARDING ELEMENT AGAINST THE WEDGE DURING THE OPENING OF THE DOOR.
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