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:
May. 04, 1993
Filed:
May. 16, 1991
Applicant:
Inventor:
Umberto Monacelli, I-20052 Monza, IT;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16D / ; B25C / ;
U.S. Cl.
CPC ...
91442 ; 91461 ; 227130 ;
Abstract
A pneumatic operated fastener driving device having a trigger valve and an improved main valve with a flexible membrane that controls the flow of compressed air to and from the cylinder. The flexible membrane maintains the main valve close no matter when the tool is connected or disconnect to an air supply line. Further, the main valve including the flexible membrane are designed and constructed to undergo a high number of tool cycles to provide long wear and low maintenance.