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. 06, 1983
Filed:
Sep. 21, 1981
Hanns Zimmermann, Memmingen, DE;
Peter Preisenhammer, Kempten, DE;
Saurer-Allma GmbH, Kempten, DE;
Abstract
A pneumatically driven clamping device, in particular a machine vice, has a clamping member movable in the clamping direction in a stationary housing and an adjusting arrangement for coarse adjustment of the clamping member in the clamping direction with respect to the stationary housing. Between the adjusting arrangement and the clamping member in a drive housing there is provided a power amplifier with a primary element to which pneumatic pressure can be admitted, an abutment provided at one end of the power amplifier and connected to the adjusting arrangement, and a secondary element movable in the clamping direction at the other end of the power amplifier and acting on the clamping member. In the drive housing a wedge is provided which is movable transversely of the clamping direction of the power amplifier, is disposed between the secondary element of the power amplifier or its abutment and the respectively adjoining part to separate them in the clamping direction and is driven by a pneumatic piston and cylinder unit whose pressure chamber is connected in series with the pressure chamber of the primary drive element via a connecting duct and an adjustable excess-pressure valve arranged in this duct.