Pivoting blade retainer
AssigneeBlack & Decker Inc.
InventorGabriel da Graca
Life of this patent
Estimating the term…
Abstract
A reciprocating saw having a clamping arrangement with a clamp support base, a first locking member and a release lever. The clamp support base defines a first blade slot that is configured to receive a saw blade therein. The first locking member is movable between a disengaged position, which does not inhibit withdrawal of the saw blade from the first blade slot, and an engaged position that inhibits withdrawal of the saw blade from the first blade slot. The release lever is pivotally coupled to the clamp support base and coordinates movement of the first locking member.
Claims19
A reciprocating saw comprising:
- a housing;
- a drive shaft coupled to the housing for reciprocating motion along an axis;
- a clamping arrangement having a clamp support base, a first locking member, a pivot pin, and a release lever, the clamp support base being coupled to the drive shaft for movement therewith, the clamp support base defining a first blade slot and a first cavity, the first blade slot extending parallel to the axis and being adapted to receive a saw blade therein, the first cavity intersecting the first blade slot, the first locking member being received in the first cavity and movable between a disengaged position, which does not inhibit withdrawal of the saw blade from the first blade slot, and an engaged position that inhibits withdrawal of the saw blade from the first blade slot, the pivot pin being coupled to the clamp support base, the release lever having a first unlocking surface and a cam surface, the release lever being pivotally mounted on the pivot pin and movable between a first position and a second position, wherein when the release lever is in the first position, the first unlocking surface is disposed in-line with the first cavity, permitting movement of the first locking member from its engaged position to its disengaged position, and wherein when the release lever is in the second position, the cam surface is in-line with the first cavity preventing movement of the first locking member from its engaged position to its disengaged position.
A saw blade clamping arrangement for a power tool having a housing, a drive shaft and a saw blade, the drive shaft being mounted for motion relative to the housing and having a longitudinal drive axis, the saw blade being adapted to be releasably interconnected with the drive shaft via the saw blade clamping arrangement, the saw blade clamping arrangement comprising:
- a clamp support base having a first saw blade slot that is adapted to receive the saw blade;
- a first locking member operatively associated with the clamp support base and movable between a locked position, which is adapted to lock the saw blade in the first saw blade slot, and an unlocked position that is configured to at least partly release the saw blade to permit the saw blade to be withdrawn from the first saw blade slot;
- a pivot pin mounted to the clamp support base and supported by opposing walls of the support base;
- and
- a release lever having a user interaction portion and a first cam surface, the release lever being positioned intermediate the opposing walls of the clamp support base and rotatably coupled around a pivot axis that is defined by the pivot pin, wherein the release lever is movable between a first position, corresponding to locating the first locking member in its locked position, and a second position, which is associated with locating the first locking member in its unlocked position, wherein positioning of the release lever in the first position causes the first cam surface to urge the first locking member at least partially into the first saw blade slot.
A saw blade clamping arrangement for a power tool that has a housing, a drive shaft and a saw blade, the drive shaft being mounted for motion relative to the housing and having a longitudinal drive axis, the saw blade being adapted to be releasably interconnected with the drive shaft via the saw blade clamping arrangement for reciprocating motion along a longitudinal axis, the saw blade clamping arrangement comprising:
- a clamp support base that is adapted to be coupled to the drive shaft for common movement, the clamp support base having a first saw blade slot;
- a first locking member received in the clamp support base and movable between a locked position, which is adapted to lock the saw blade in the first saw blade slot, and an unlocked position that permits the saw blade to be input to and withdrawn from the first saw blade slot;
- a release lever having a user interaction portion and a first cam surface, the release lever being coupled to the clamp support base for rotational movement about a pivot axis between a first position and a second position to thereby move the first locking member, wherein placement of the release lever in the first position places the first locking member in its locked position, and wherein placement of the release lever in the second position places the first locking member in its unlocked position;
- and
- a pivot pin coupled to the clamp support base and defining the pivot axis that the release lever rotates about, wherein the pivot pin is supported by opposing walls of the clamp support base located on opposite sides of the release lever, wherein rotation of the release lever from the second position to the first position causes the first cam surface to urge the first locking member at least partially into the first saw blade slot.
Dependencies are inferred from the claim text.