Dent removing pneumatic puller

Details Dent removing pneumatic puller Dent removing pneumatic puller

1983-05-06

1985-01-29

Larson, Lowell A.

Metal deforming

With means to drive tool

Including pneumatic- or fluid-actuated tool support

72705, B21D 112

Patent

active

044957912

ABSTRACT:
Disclosed is a pneumatic puller which can be used to pull dents from automobile bodies and for similar applications. The pneumatic puller has a threaded point which engages the material to be pulled. A pneumatic motor rotates the point so that the threads engage the sheet metal or other material being straightened. The puller also includes a piston which is driven rearwardly against a rear cap by the pressure of compressed gas. The hammering action of the piston against the rear cap forces the dented material to be pulled back into shape. A spring is used to return the piston within the tool. A piston control valve is used to control the supply of compressed gas to the piston. A pressure adjustment valve is used to adjust the pressure of the compressed gas applied to the piston thereby controlling the force of the pneumatic puller.

REFERENCES:
patent: 3744291 (1973-07-01), Hagerty et al.
patent: 3922902 (1975-12-01), Jarman
patent: 4072042 (1978-02-01), Servin et al.
patent: 4073181 (1978-02-01), Steinmann, Jr.
patent: 4122699 (1978-10-01), Logsdon
patent: 4187708 (1980-02-01), Champoux

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