The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 10, 1981
Filed:
Nov. 27, 1978
Samuel H Pruden, East Hartford, CT (US);
Cushman Industries, Incorporated, Hartford, CT (US);
Abstract
Journalled in a peripheral groove in an operationally turning chuck body is a non-turning fluid coupling ring of which opposite side faces confront opposite side walls of the groove. Leading from annular ports in the groove walls are fluid passages which extend to chuck-closing and chuck-opening ends of a cylinder in the chuck body, and provided in the ring are fluid supply passages which lead to the opposite ring faces where they are in line with the ports in the confronting groove walls. The coupling ring has some lateral play in the body groove and acts as a shuttle valve in being operationally backed with either face into sealing engagement with the confronting groove wall by the pressure of operating fluid admitted to the port in the groove wall confronting the opposite ring face. Such operational back-up of the coupling ring with either side against the confronting groove wall will also open a gap between the opposite ring side and the confronting groove wall, and such gap at either ring side is open to the atmosphere and has associated therewith a sealing ring which is mounted on the chuck body and extends into the path of fluid escaping through the gap, with the sealing ring being flexed into closure of the gap to the atmosphere by fluid escaping into the gap.