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:
Sep. 12, 2000
Filed:
Feb. 16, 1998
Linde Aktiengesellschaft, , DE;
Abstract
This invention relates to a device to reduce pulsations on a hydrostatic positive displacement unit, such as an axial piston machine or a radial piston machine which can be used both as a pump and as a motor. The direction of rotation of the positive displacement unit is reversible and at least one piston is mounted so that it can move longitudinally in a cylinder bore forming a cylinder chamber. The device has a buffer element which can be brought into communication with the cylinder chamber by a connecting channel. It is possible to further optimize the reversing action of the cylinder chambers from the inlet side to the outlet side and to effectively minimize pulsations in a broad bandwidth of operating conditions by increasing the capacity of the buffer element compared to the capacity of an oil-filled buffer element and/or by providing at least one additional connecting channel which connects the cylinder chamber with the buffer element or with a control nodule of the positive displacement unit, whereby a throttling device is located in the other connecting channel. The buffer element may be a hydropneumatic buffer.