Chain saw with tool-less chain tensioner and guide bar lock
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B27B-017/14
B27B-017/00
출원번호
US-0069799
(2005-03-01)
발명자
/ 주소
Warfel,Paul A.
McKeithen,Steven
Zapanata,Dennis
Keeton,William B.
출원인 / 주소
Husqvarna Outdoor Products Inc.
대리인 / 주소
Pearne & Gordon LLP
인용정보
피인용 횟수 :
4인용 특허 :
23
초록▼
A chain saw includes an engine, a chassis, and a clutch cover. A guide bar is adjustable relative to the chassis and the clutch cover, but stationary while in a secured position. An adjustment arrangement moves the guide bar to tension a chain, and includes a member operatively connected to the bar,
A chain saw includes an engine, a chassis, and a clutch cover. A guide bar is adjustable relative to the chassis and the clutch cover, but stationary while in a secured position. An adjustment arrangement moves the guide bar to tension a chain, and includes a member operatively connected to the bar, intermeshed drive components to move the bar, and a manually engaged member that is operated without use of any tool. A guide bar securing arrangement has a knob rotatable between a tightened and loosened positions. In the loosened position, the guide bar may be adjusted. A knob handle of the securing arrangement is pivotable between a stowed position and an operation position. A lock arrangement, associated with the knob and knob handle, includes portions that cooperate to prevent the knob from rotating when the knob handle is in the stowed position.
대표청구항▼
What is claimed is: 1. A chain saw including: an engine; an engine chassis supporting the engine; a clutch cover securable relative to the engine; a guide bar adjustable relative to the engine chassis and the clutch cover, the guide bar being stationary relative to the clutch cover and the engine c
What is claimed is: 1. A chain saw including: an engine; an engine chassis supporting the engine; a clutch cover securable relative to the engine; a guide bar adjustable relative to the engine chassis and the clutch cover, the guide bar being stationary relative to the clutch cover and the engine chassis while in a secured position; a cutting chain extending along the guide bar and operatively connected to be driven by the engine; an adjustment arrangement for moving the guide bar to an adjusted position and tension the chain, the adjustment arrangement including a member operatively connected to the guide bar, a sequence of intermeshed drive components operable to cause movement of the guide bar, and a manually engaged member that is operated without use of any tool to cause operation of the intermeshed drive components and move the guide bar; a guide bar securing arrangement including a rotatable knob operatively cooperative with the engine chassis, the clutch cover, and the guide bar, wherein the knob can be rotated between a tightened position, in which the guide bar is tightened between the engine chassis and the clutch cover, and a loosened position, in which the guide bar is loosened and can be adjusted, and a knob handle, having an end portion pivotally connected to the knob, and a lock portion extending from the end portion, wherein the knob handle is pivotable between a stowed position and an operation position; and a lock arrangement associated with the knob and the knob handle, the lock arrangement including portions that cooperate to permit the knob to be rotated when the knob handle is in the operation position and prevent the knob from rotating when the knob handle is in the stowed position. 2. A chain saw as set forth in claim 1, wherein the cooperating portions of the lock arrangement include a plurality of fixed engagement points fixed relative to the clutch cover, and an engagement portion associated with the knob handle, wherein the engagement portion associated with the knob handle is engaged with a respective one of the fixed engagement points when the knob handle is in a locked position, and disengaged from the fixed engagement points when the knob handle is in an unlocked position. 3. A chain saw as set forth in claim 2, wherein the engagement portion includes a protrusion that moves with the knob handle toward and away from the clutch cover, and the protrusion mates with one of the engagement points when the knob handle is in the locked position. 4. A chain saw as set forth in claim 1, wherein the sequence of intermeshed drive components of the adjustment arrangement includes an adjust wheel that is rotated by hand and without a tool, a gear engaged with the adjust wheel and rotated when the adjust wheel is rotated, a screw connected to rotate with the gear, and an adjust pin engaged with the screw to move along the screw as the screw rotates, the adjust pin is engaged with the guide bar and moves the guide bar as the pin moves along the screw. 5. A chain saw as set forth in claim 4, wherein a portion of the adjust pin engaged with the screw has a length extending along the screw that is larger than a diameter of the screw. 6. A chain saw as set forth in claim 5, wherein the length of the portion of the adjust pin engaged with the screw is about twice the dimension of the diameter of the screw. 7. A chain saw as set forth in claim 1, wherein the guide bar has a slot, a dovetail projection extends into the slot.
Wissmann Michael (Markgrningen DEX) Nickel Hans (Cottenweiler DEX) Zllner Erich (Bietigheim Bissingen DEX), Saw chain tensioning arrangement for a chain saw.
Schliemann Harald (Waiblingen DEX) Krebs Rudolf (Backnang DEX) Geyer Werner (Waiblingen DEX) Nickel Hans (Cottenweiler DEX) Zimmermann Helmut (Kernen DEX), Tensioning arrangement for a saw chain.
Schliemann Harald (Waiblingen DEX) Geyer Werner (Waiblingen DEX) Zimmermann Helmut (Kernen i.R. DEX) Krebs Rudolf (Backnang DEX) Nickel Hans (Cottenweiler DEX), Tensioning arrangement for a saw chain of a motor-driven chain saw.
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