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:
Dec. 16, 2003
Filed:
Jan. 04, 2002
Gerhard Beutler, Nagold, DE;
Brueninghaus Hydromatik GmbH, Elchingen, DE;
Abstract
A hollow piston ( ) piston engine including a closed annular cavity ( ). Said hollow piston constituted of a first piston part ( ) with a base section ( ) from which a joint part ( ) extends in one axial direction, and from which a peripheral wall ( ) that delimits the annular cavity ( ) on the outside, and a mandrel ( ) that delimits the annular cavity ( ) on the inside extend, each as one piece, in the other axial direction. The hollow piston is also constituted of a second piston part ( ) having a cover ( ) which is connected to the ends of the peripheral wall ( ) and of the mandrel ( ), said ends facing away from the base section ( ). In order to achieve an economical and simple production while ensuring the provision of a stabile construction, the peripheral wall ( ) and the mandrel ( ) are formed on the base section ( ) without machining.