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:
Oct. 10, 1978
Filed:
Mar. 04, 1977
John N Scapes, Schaumberg, IL (US);
Gould Inc., Rolling Meadows, IL (US);
Abstract
A needle valve having a stem movably carried in a body defining a flow chamber with the tip of the stem being provided with a soft movable valve portion adapted to have seating engagement with an annular valve seat of a body port. The soft movable valve element may be defined by a tubular sleeve formed of a cold flowable material. A tubular retainer is slidably carried about the sleeve to prevent undesirable radial expansion of the sleeve as a result of cold flow and to direct the cold flowed material of the sleeve inwardly about a retainer portion of the stem disposed within the body port when the sleeve is in seating engagement with the body seat. The retainer is arranged to limit the adjustment of the stem to a maximum inward position wherein a major portion of the sleeve is cold flowed into the body port.