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:
Jul. 13, 1976
Filed:
Oct. 25, 1974
Applicant:
Inventor:
Richard E Atkey, Memphis, TN (US);
Assignee:
Dover Corporation, Memphis, TN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B66B / ;
U.S. Cl.
CPC ...
187 17 ; 187 95 ;
Abstract
An hydraulic jack for an elevator installation comprises a pair of cylinders and a common plunger. One cylinder is fixedly mounted in a vertical position in a hoistway; while one end of the plunger is mounted within the fixed cylinder for vertical reciprocating movement therein. The other cylinder, which carries an elevator cab up and down in the hoistway, is slidably mounted about the other end of the plunger for vertical reciprocating movement thereon.