Samuel C Davis

US Patent:

40106306, Mar 8, 1977

Filed:

Apr 8, 1976

Appl. No.:

5/674967

Inventors:

Samuel B. Davis - New Galilee PA
Donald G. Lordo - Beaver Falls PA

Assignee:

Textron, Inc. - Providence RI

International Classification:

B21J 1534

US Classification:

72391

Abstract:

The hydraulic actuated power tool includes a barrel having an internal, annular bulkhead separating the barrel into two cylinder chambers. A single piston shaft having two pistons thereon operates within the cylinders of the barrel. One of the pistons is located intermediate the shaft ends and the other is positioned at the terminal end of the piston rod. This latter piston serves as the back wall for the rear cylinder chamber. The piston shaft is ported so that in the power stroke both pistons are being urged rearward, whereas in the return stroke only the forward piston is being acted upon. The porting includes a transverse port extending across the piston shaft and a longitudinal port connecting midway of the transverse port and extending along the piston shaft and terminating in a bifurcated passageway which extends through the forward piston. A floating front wall makes up the end wall of the forward cylinder. The rear piston is attached at the terminal end of the piston shaft through a split retainer ring.

US Patent:

41365968, Jan 30, 1979

Filed:

Aug 17, 1977

Appl. No.:

5/825262

Inventors:

Samuel B. Davis - New Galilee PA

Assignee:

Textron Inc. - Providence RI

International Classification:

F16B 1905

US Classification:

85 7

Abstract:

The improved lockbolt collar comprises a substantially cylindrical first section and an outwardly flaring skirt connected to the cylindrical section. During the initial setting operation, the cylindrical portion of the collar is swaged into engagement with appropriate locking grooves on a lockbolt pin. In a second setting operation, the skirt is deformed inwardly so as to engage the locking grooves. As a result of the angular relationship of the skirt to the cylindrical section, the second setting step has the effect of elongating the collar to form a tightened joint.