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:
Aug. 08, 1978
Filed:
May. 19, 1977
Houston L Loveless, Springfield, OH (US);
Koehring Corporation, Milwaukee, WI (US);
Abstract
A vibratory roller is disclosed having an improved amplitude control device giving infinitely variable vibration amplitude which can be both increased and decreased. The roller includes a roll having a coaxial shaft driven at an angular velocity exceeding that of the roll. The rotary shaft has a transversely mounted cylinder within which an eccentric mass is slidably mounted for movement between physical constraints which limit the radially innermost position and the radially outermost position. The eccentric mass and cylinder define a piston cylinder arrangement having a control chamber which communicates with an actuating assembly that regulates radial position of the eccentric mass. The actuating assembly may include a pilot operated check valve and a valve assembly to govern communication between both a pressurized fluid source and a fluid reservoir with one side of an actuating motor piston. An indicator device is connected to the motor piston to indicate the precise location of the eccentric mass between its radially innermost and radially outermost positions. With a comparatively wide roll, a second transversely mounted cylinder and corresponding eccentric mass may be provided and arranged to operate simultaneously with the first cylinder and eccentric mass combinations.