Percussion tool

Details Percussion tool Percussion tool

1988-11-01

1990-03-20

Bell, Paul A.

Elongated-member-driving apparatus

With randomly actuated stopping or disabling means

227 8, 227130, B25C 104

Patent

active

049094190

ABSTRACT:
A percussion tool of the repeatedly operating type includes a housing, a striking cylinder received in the housing for movement therealong, and a driving piston received in the striking cylinder for movement therealong. The striking cylinder cooperates with the housing to provide a switch valve means which is responsive to the movement of the striking cylinder along the housing for selectively interrupting fluid communication between the interior of the striking cylinder and a discharge port and communicating the interior of said striking cylinder with a compressed air source when the striking cylinder is at its lower position to thereby move the striking piston to cause an associated striking driver to strike a driven element and for selectively interrupting the communication between the interior of the striking cylinder and the compressed air source and communicating the interior of the striking cylinder with the discharge port as the striking cylinder is moved from its lower to upper position. Air within that portion of the interior of the striking cylinder between a lower face of the driving piston and a lower end of the striking cylinder is compressed by the striking piston moving toward an ejecting portion receiving the driven element and is supplied to a return air chamber. The air thus compressed acts on the lower face of the piston to urge the same away from the ejecting portion.

REFERENCES:
patent: 4030655 (1977-06-01), Rothfuss et al.
patent: 4483473 (1984-11-01), Wagdy

Affiliated with

Also associated with

Rating

Percussion tool does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Percussion tool, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Percussion tool will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-786524