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:
Feb. 23, 1988
Filed:
Feb. 03, 1986
Robert H Green, Bowling Green, OH (US);
Other;
Abstract
A hydraulic cylinder is disclosed having a hollow cylinder with a closed first end and an open second end. A rod is positioned in the interior of the hollow cylinder and the rod is securely connected to the first end of the cylinder. The rod is positioned in substantially the center of the hollow cylinder and is substantially parallel to the longitudinal axis of the cylinder. The end of the rod that is spaced apart from the first end of the cylinder has an area of enlarged cross-section. A movable piston having a first end and a second end positioned with the first end of the piston being in the interior of the hollow cylinder. The second end of the piston extends from the open end of the hollow cylinder. The first end of the piston defines a slot for receiving the end of the rod having an enlarged cross-section. The slot is disposed to receive the end of the rod having the enlarged cross-section when the slot and the end of the rod are properly aligned. The piston is rotatable to change alignment between the slot and the end of the rod to prevent the piston from being removed from the rod and from the cylinder. There is also provided an orifice in said piston adjacent said first end of the piston. The orifice moves into communication with the atmosphere if the piston exceeds the desired range of movement in a direction towards the seceond end of the hollow cylinder. The orifice then vents the hydraulic fluid driving the piston to the atmosphere and the advancement of the piston stops.