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:
Dec. 02, 1997
Filed:
Oct. 18, 1995
Udo Sonntag, Kamp-Lintfort, DE;
IMI Norgren GmbH, , DE;
Abstract
A double-acting pneumatic cylinder is characterised by the provision of a pair of sealing elements respectively located on either side of the piston by means of rods slidably mounted in longitudinal bores formed in the piston. At the commencement of the cylinder's in-stroke, the rod and its associated sealing element is in an extended position and serves to seal off the main exhaust port while the piston is still relatively distantly located from the end of its in-stroke. During further in-stroking the piston, air can therefore exhaust only through the auxiliary exhaust port and the motion is thus cushioned. The out-stroke of the cylinder is similarly cushioned over a relatively large distance by virtue of the sealing element adopting an extended position and closing off the main exhaust port, the air exhausting through the auxiliary exhaust port.