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:
Jun. 25, 2002
Filed:
Aug. 30, 2000
Steven Chamulak, Canton, MI (US);
Michael A. Ferkany, White Lake, MI (US);
ACE Controls, Inc., Farmington, MI (US);
Abstract
A pneumatic cylinder having internal hydraulic dampening device for cushioning the motion of a pneumatic piston ( ) at its end of stroke. The hydraulic device includes a pair of hydraulic pistons ( ) cooperating with a pair of hydraulic cylinders to form a pair of hydraulic chambers ( ), which communicate with each other by a restricted flow passage ( ). When the pneumatic piston nears its end of stroke, one of the hydraulic pistons is moved to compress the corresponding hydraulic chamber, forcing hydraulic fluid through the restricted flow passage, to the other hydraulic chamber. The flow of hydraulic fluid through the restricted flow passage slows the pneumatic piston, thereby cushioning the end of stroke motion. The restricted flow passage can include a plurality of flow passages which are sequentially closed by pins ( ) connected to one of the hydraulic pistons, as the hydraulic piston moves, to vary the restriction in the flow passage.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile