Tool driving or impacting – Processes
Patent
1976-09-29
1979-09-25
Staab, Lawrence J.
Tool driving or impacting
Processes
173133, B25D 900
Patent
active
041687515
ABSTRACT:
A driver tool of the power hammer type is equipped with a compression spring acting on the anvil of the tool and loaded by the weight of the tool and by downcrowding to store energy from the load and from attempted rebound of the anvil which is released to the anvil in a driving direction adding to the driving force of the hammer. The spring has a stiffness and a length effective to maintain a free stroke length for the hammer before impacting the anvil when the tool is loaded or downcrowded sufficiently to maintain the anvil thrusting against the workpiece and to develop and build up vibrations from the hammer blows. The hammer blows are divided into impulses by the vibrations allowing the workpiece to recover from blows of magnitudes beyond the elastic limit of the workpiece material which would otherwise damage the workpiece. The preferred spring is a cylindrical spaced coil helical spring having its bottom coil engaging the anvil in good vibration transferring relation and a top end coil bottomed on the end wall of a slip housing surrounding the spring and anvil. The housing is bottomed on the bottom end face of the tool body. A nonmetallic slip washer is preferably interposed between the housing and the bottom end of the tool body to dampen transfer of vibrations into the tool body and to accommodate rotation of the anvil which is desirable when rock drill and the like breaker tools are mounted on the anvil.
REFERENCES:
patent: 1399387 (1921-12-01), Jackson
patent: 1954411 (1934-04-01), Heitzman et al.
patent: 2413542 (1946-12-01), Butts
patent: 2500402 (1950-03-01), Craig
patent: 2519477 (1950-08-01), Kind
patent: 2917953 (1959-12-01), Badali
patent: 3054464 (1962-09-01), Ondeck
patent: 3191694 (1965-06-01), Elliott et al.
patent: 3244241 (1966-04-01), Ferwerda
patent: 3332503 (1967-07-01), Klebanov
patent: 3336988 (1967-08-01), Jones
patent: 3746104 (1973-07-01), McIntosh et al.
patent: 3991835 (1976-11-01), Bailey et al.
patent: 4072199 (1978-02-01), Wanner
Foresight Industries
Staab Lawrence J.
LandOfFree
Driver 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 Driver tool, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Driver tool will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1983214