US 6,883,401 B2Granted

Power tool for fastening objects

OwnerJohn K. Junkersinventor

Life of this patent

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Abstract

A power tool for fastening objects has a housing with a non-rotatable element, a power drive in the housing and provided with a rotatable driving element, and a fastener part including a bolt having a thread and an axis and introducable into parts forming an object, a nut screwable on the bolt and cooperating with the rotatable driving element, and a washer to be applied between the nut and an object and cooperating with the non-rotatable element, the washer having an axis and being provided with a first bearing face surface located at one axial side and adapted to cooperate with the nut, a second bearing face surface located at an opposite axial side and adapted to cooperate with the object, and at least one third turning resistant surface adapted to cooperate with the thread of the bolt, so that when driving element turns the nut with a given active force in one direction and the washer is held stationarily applied by the non-rotatable element of the housing, the nut turns to tighten or loosen the bolt, and the washer remains rotation stationary while the bolt elongates or relaxes in an axial direction.

Claims18

Dependent claims

A power tool in combination with a fastener for fastening objects, comprising a tool part including a housing provided with a non-rotatable element;

and a power drive in said housing and provided with a rotatable driving element;
and a fastener part including a bolt having a thread and an axis and introducable into parts forming an object, a nut screwable on said bait and cooperating with said rotatable driving element, and a washer to be applied between said nut and the object and cooperating with said non-rotatable element, said washer having an axis and being provided with a first bearing face surface located at one axial side and adapted to cooperate with said nut and having a facial friction with said nut, a second bearing face surface located at an opposite axial side and adapted to cooperate with the object and having a facial friction with the object, and at least one third turning resistant surface located inside said washer and adapted to cooperate with said thread of said bolt and having a turning friction with the bolt, said washer including a radially inner part having a radially outer surface and bolt thread engaging means to connect with a thread of the bolt, and also including a radially outer part having a radially inner surface, said radially outer and inner surfaces of saidradially inner and radially outer parts of said washer cooperating with one another so that said radially inner part can not rotate freely inside said radially outer part during tightening but is displaceable axially relative to said radially outer part upon bolt elongation, so that when said driving element turns said nut with a given active force in one direction and said outer part of said washer is held stationarily by a reactive force applied by said non-rotatable element of said housing to absorb a reaction force corresponding to said given force and due to the facial friction of said washer with said nut, the facial friction of said was her with the object, and the turning friction of said washer with said bolt, only said nut turns to elongate said bolt, and said washer remains rotationally stationary while said bolt does not turn but elongates or relaxes in an axial direction.

A power tool in combination with a fastener for fastening objects, comprising a tool part including a housing provided with a non-rotatable element, and a power drive in said housing and provided with a rotatable driving element;

and a fastener part including a bolt having a thread and an axis and introducable into parts forming an object, a nut screwable on said bolt and cooperating with said rotatable driving element, and a washer to be applied between said nut and the object and cooperating with said non-rotatable, washer having an axis and being provided with a first bearing face surface located at one axial side and having a facial friction with said nut, a second bearing face surface located at an opposite axial side and having a facial friction with the object, and at least one third turning resistant surface adapted to cooperate with said thread of said bolt and having a turning friction with the bolt, so that when said driving element turns said nut with a given active force in one direction and said washer is held stationarily by said non-rotatable element of said housing to absorb the reaction force due to the facial friction of said washer with said nut, the facial friction of said washer with the object, and the turning friction of said washer with said bolt, only said nut turns to tighten or loosen said bolt, and said washer remains rotationally stationary while said bolt elongates or relaxes in an axial direction, said washer including a radially inner part having a radially outer surface and bolt thread engaging means to connect with a thread of the bolt, and also including a radially outer part having a radially inner surface, and said radially outer and radially inner surfaces of said radially inner and radially outer parts of said washer cooperating with one another so that said radially inner part can not rotate freely inside said radially outer part during tightening but is displaced axially relative to said radially outer part upon bolt elongation.

Dependencies are inferred from the claim text.

Facts

Application: 10/120,343Filed 11 Apr 2002 · continuation in part
Priority: 6 Dec 2001
Published: US 2003/0106396 A112 Jun 2003
Granted: 26 Apr 2005
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

F16B 5/02
Joining sheets or plates , e.g. panels, to one another or to strips or bars parallel to them: by means of fastening members using screw-thread
B25B 23/10
For holding or positioning screw or nut prior to or during its rotation: using mechanical gripping means
F16B 43/00
Washers or equivalent devices
Y10S 411/917
Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener: nut having tension feature

Family

Application10/010,377Parent of this continuation-in-part · filed 6 Dec 2001
US 2003/0106396 A1Pre-grant publication · published 12 Jun 2003
US 6,609,868 B2Parent of this continuation-in-part
US 2003/0108404 A1Published application
US 6,883,401 B2This patent

From the US filing history. Foreign family members aren’t listed.