Power spring configurations for a fastening device
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B25C-005/02
B25C-005/08
출원번호
US-0412202
(2012-03-05)
등록번호
US-8978952
(2015-03-17)
발명자
/ 주소
Marks, Joel S.
출원인 / 주소
Worktools, Inc.
대리인 / 주소
Feng, Paul Y.
인용정보
피인용 횟수 :
2인용 특허 :
46
초록▼
Power spring configurations for a spring energized fastening device includes a compact double torsion power spring and two opposed compact single torsion springs. Simplified structures to hold the springs in a stable pre-loaded position are disclosed. Each coil has forward extending arms including a
Power spring configurations for a spring energized fastening device includes a compact double torsion power spring and two opposed compact single torsion springs. Simplified structures to hold the springs in a stable pre-loaded position are disclosed. Each coil has forward extending arms including an angled portion and forward vertically coincident portions. The double torsion spring has a self-locking crossing geometry to hold a pre-loaded rest position. The opposed two springs have a bridge and a mandrel to hold the rest position. A lever presses arms of the spring between a striker and the coil including a compact nesting condition. A tab of the striker extends forward to provide a release edge and a positioning torque bias upon the striker.
대표청구항▼
1. A spring energized fastening device including a housing, a power spring, a striker movable vertically at a front of the housing, and a fastener, the fastening device comprising: a rest condition and a pre-release condition of the fastening device, the power spring being deflected in the pre-relea
1. A spring energized fastening device including a housing, a power spring, a striker movable vertically at a front of the housing, and a fastener, the fastening device comprising: a rest condition and a pre-release condition of the fastening device, the power spring being deflected in the pre-release condition whereupon the power spring is released to eject and install the fastener from the fastening device through energy stored in the deflected power spring;the power spring being a torsion type including coaxial coils with at least four arms extending forward therefrom;wherein the four arms include a first pair of arms being outer arms near a location of the coils, the first pair crossing a second pair of arms to become inner arms forward of the crossing location; andthe power spring including a normal rest position wherein the arms are substantially vertically coincident at the crossing location and the first pair of arms presses the second pair of arms at the crossing location. 2. The spring energized fastening device of claim 1, wherein, with respect to a side view, one of the four arms extends forward from the coil at an angle toward a further arm, the one arm including a bend forward of which the two arms are substantially parallel and coincident. 3. The spring energized fastening device of claim 1, wherein the first pair of arms terminate in distal ends, and the distal ends engage the striker. 4. The spring energized fastening device of claim 3, wherein the second pair of arms are joined by a loop near the distal ends of the first pair, the crossing location is adjacent the loop, and respective bends of the first pair descend into the loop to retain the first pair laterally upon the loop. 5. The spring energized fastening device of claim 4, wherein the loop is spaced rearward from the striker, the distal ends of the first pair of arms extend past the loop to expose the arms from below in front of the loop, and the distal ends press an absorber in a lowest position of the striker. 6. The spring energized fastening device of claim 1, wherein a lever is pivotally attached at a lever pivot to the housing at the front of the housing proximate the striker, a handle is pivotally attached to the housing separately from the lever, the handle being linked to the lever so that moving the handle causes the lever to move, the lever including a fulcrum rearward of the lever pivot, and the fulcrum directly pressing at least one of the first and second pairs of arms of the power spring to deflect the power spring. 7. The spring energized fastening device of claim 6, wherein a tab of the lever extends under the spring wire at the fulcrum, the tab providing a tensile connection between the lever and the spring. 8. The spring energized fastening device of claim 6, wherein the lever presses one pair of the first and second pairs of spring arms and, in the pre-release condition, the lever moves below a further substantially stationary pair of spring arms to become nested among the further pair. 9. The spring energized fastening device of claim 1, wherein the striker includes an upper position above a staple track and a lower position in front of the staple track, and the striker remains substantially stationary in the upper position as the power spring is deflected. 10. A spring energized fastening device including a housing, a power spring, a fastener, and a striker movable vertically at a front of the housing, the fastening device comprising: a rest condition and a pre-release condition of the fastening device, the power spring being deflected in the pre-release condition wherein the power spring is released to eject the fastener from the fastening device through energy stored in the deflected power spring;the power spring having an assembly of two opposed separate torsion springs including coaxial coils with four arms extending forward there from, the torsion springs including a free position, a rest position and a pressed position, the coils being of a larger diameter in the free position than the rest position;wherein the four arms include a first pair of arms being outer arms and second pair of arms being inner arms;a mandrel co-extending within the coils wherein the coils are supported on the mandrel, in the rest or pressed positions of the power spring the coils are biased to spread apart from each other upon the mandrel, wherein the mandrel includes opposed flanges to each side of the spring coils to confine the coils from spreading; andwherein the mandrel includes an enlarged diameter flange, and the flange fits slidably through an inside diameter of a coil when the torsion spring is near its free position, and in the pressed position of the spring, the inside diameter is substantially less than a diameter of the flange. 11. The spring energized fastening device of claim 10, wherein the mandrel pivotally fits upon a post of the housing. 12. The spring energized fastening device of claim 10, wherein the inner arms extend immediately adjacent to each other, and a front end of the inner arms engages the striker. 13. The spring energized fastening device of claim 10, wherein with respect to a side view, an arm extends forward from the coil at an angle toward a further arm, the arm including a bend forward of which the two arms are substantially parallel and coincident. 14. The spring energized fastening device of claim 10, wherein arms of the springs are assembled to a bridge, the bridge holds the arms in a spring rest condition wherein the arms are substantially parallel and coincident at a location of the bridge. 15. The spring energized fastening device of claim 14, wherein the inner arms extend past the bridge to engage the striker, and an underside of the inner arms presses an absorber in a striker lowest position. 16. The spring energized fastening device of claim 14, wherein a lever is pivotally attached at a lever pivot to the housing at the front of the housing proximate the striker, a handle is pivotally attached to the housing separately from the lever, the handle being linked to the lever so that moving the handle causes the lever to move, the lever includes a fulcrum rearward of the lever pivot, and the fulcrum presses a pair of arms of the power spring at the bridge to deflect the power spring. 17. The spring energized fastening device of claim 14, wherein, in the rest condition, the bridge includes hooks around the outer arms to retain them against an upward force and a floor of the bridge crosses between the two separate springs to retain the inner arms against a downward force. 18. The spring energized fastening device of claim 17, wherein a hump in the floor holds a space between the two inner arms. 19. The spring energized fastening device of claim 17, wherein the floor extends forward of the hooks. 20. The spring energized fastening device of claim 10, wherein a lever is pivotally attached at a lever pivot to the housing at the front of the housing proximate the striker, a handle is pivotally attached to the housing separately from the lever, the handle being linked to the lever so that moving the handle causes the lever to move, the lever including a fulcrum rearward of the lever pivot, the fulcrum pressing a pair of arms of the power spring to deflect the power spring, and in a pre-release position the lever straddles the inner arms to extend below the inner arms. 21. A spring energized fastening device including a housing, a power spring, and a striker movable vertically at a front of the housing, the fastening device comprising: a rest condition and a pre-release condition of the fastening device, the power spring being deflected in the pre-release condition wherein the power spring is released to actuate an ejection action through energy stored in the deflected power spring;the power spring having an assembly of two opposed separate torsion springs including coaxial coils with four arms extending forward there from, the torsion springs including a free position, a rest position and a pressed position;the four arms include a first pair of arms being outer arms and second pair of arms being inner arms;a mandrel of the power spring assembly co-extending within the coils wherein the coils are supported on the mandrel, the mandrel being of a smaller outer diameter than an inner diameter of the power spring coils in the rest position of the springs; andwherein the coils are biased to twist and spread apart from each other on the mandrel in a preloaded condition of the power spring, the mandrel including protruding flanges at each end of the mandrel to confine the coils from spreading, the flanges being at least in part a larger diameter than the inner diameter of the power spring coils in the rest position of the springs. 22. The spring energized fastening device of claim 21, wherein a bridge extends between the spring arms at a forward position of the arms, the bridge holding the arms in a preloaded rest position of the springs. 23. The spring energized fastening device of claim 22, wherein an outer arm of a torsion spring is spaced laterally from an inner arm of the torsion spring, the arms press the bridge in opposed vertical directions to create a horizontal torque arm, the torque arm causing the twist bias upon the coils. 24. The spring energized fastening device of claim 21, wherein a spring has a free position, and a flange fits slidably through an inside diameter of a coil of the spring in the spring free position. 25. The spring energized fastening device of claim 21, wherein the coils are assembled upon the mandrel before at least one flange is formed to the mandrel.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.