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. 03, 1986
Filed:
Aug. 29, 1985
Mathew A Slaats, Jasper, IN (US);
Patrick E Strange, Jasper, IN (US);
Kimball International, Inc., Jasper, IN (US);
Abstract
A hydraulic lifting mechanism for an article of furniture including a refrigerant containing reservoir. The mechanism includes a flexible bag having a variable volume and fixed volume reservoir including a diaphragm for dividing the reservoir into two chambers. The first chamber contains hydraulic liquid and the second chamber contains a compressed two phase working fluid. The hydraulic liquid may be transferred between the flexible bag and the first chamber. A control valve mechanism is included in the flexible conduit which connects the flexible bag with the first chamber. The mechanism may be used in combination with a chair to provide an adjustable height control for the seat of the chair or in combination with other articles of furniture.