Metal deforming – With means to drive tool – Including pneumatic- or fluid-actuated tool support
Patent
1994-08-01
1996-11-12
Jones, David
Metal deforming
With means to drive tool
Including pneumatic- or fluid-actuated tool support
72479, 724811, 724822, 2924354, B21J 1540
Patent
active
055729002
ABSTRACT:
The invention provides a reduced recoil bucking bar and corresponding methods for forming joints with rivets. The bucking bar includes a housing and a driven member movable with respect to the housing. The worker using the bar holds it with the driven member pressed against one end of the rivet. When blows are delivered from the hammer through the rivet to the bar, an appropriate reaction force is generated automatically by mechanisms within the bar. These mechanisms include at least a first pressure chamber and an exhaust port for releasing pressure from the pressure chamber to the atmosphere. By controlling the flow of air through the pressure chamber, the mechanisms within the bucking bar control the forces acting on the driven member during the recoil and rebound motions. Preferred control mechanisms include a second pressure chamber and a movable shuttle. The shuttle is initially biased in a preferred direction by a biasing element in the form of a coil spring. Subsequent movement of the shuttle is dependent upon the characteristics of the hammer blow. Generation of reaction force within the bucking bar is in turn dependent on the position and motion of the shuttle. Preferably, the shuttle acts as part of several valves controlling the flow of pressurized air into and out of the two pressure chambers. A piston fixed to the end of the driven member acts as part of another valve for controlling the flow of pressurized air into the first pressure chamber.
REFERENCES:
patent: D272708 (1984-02-01), Gidlund et al.
patent: 838878 (1906-10-01), Gunnell
patent: 1100230 (1914-06-01), Detwiler
patent: 2274091 (1942-02-01), Pavlecka et al.
patent: 2321225 (1943-06-01), McIntire
patent: 2349341 (1944-05-01), Disse
patent: 2354914 (1944-08-01), Goldstein
patent: 2396413 (1946-03-01), Egger
patent: 2417490 (1947-03-01), Hewes
patent: 2451063 (1948-10-01), Brown
patent: 2512532 (1950-06-01), Sargent et al.
patent: 2519308 (1950-08-01), Brown
patent: 3124981 (1964-03-01), Hedden et al.
patent: 3478567 (1969-11-01), Galutia
patent: 3554427 (1971-01-01), Steggles
patent: 3696501 (1972-10-01), Burtin
patent: 4218911 (1980-08-01), Johnston
patent: 4380923 (1983-04-01), Emmerich
patent: 4398411 (1983-08-01), Emmerich
Jones David
The Deutsch Company
LandOfFree
Reduced recoil bucking bar does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Reduced recoil bucking bar, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reduced recoil bucking bar will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-555073