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:
Nov. 22, 1977
Filed:
Apr. 28, 1976
Richard G Dressell, Jr, Livonia, MI (US);
Robert J Heideman, Westland, MI (US);
Other;
Abstract
A shock absorber for providing a linear decelerating force to a machine part by means of a piston which forces fluid through a series of orifices formed by the coaction of holes in the piston cylinder and grooves formed on the internal diameter of a sleeve which fits over the cylinder. One form of groove is disclosed which varies in depth about the perimeter of the sleeve and has an inclined sidewall which varies the width of the groove on the internal diameter of the sleeve as a function of its depth. An alternative form of groove has a constant depth and is formed spirally on the sleeve with a pitch that is an integral divisor of the hole spacings. A series of orifices having a low ratio of length to width are formed by the coaction of the holes and the grooves and are adjustable by rotating the cylinder relative to the sleeve. The absorber is constructed in such a manner as to allow the insertion of the piston into the cylinder without any special inserting tools and to eliminate the possibility of an improper assembly.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile