Blade clamp for reciprocating saw

Patent metadata

Field	Value
Publication number	US-11065698-B2
Application number	US-201916433059-A
Country	US
Kind code	B2
Filing date	Jun 6, 2019
Priority date	Jun 14, 2018
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

A blade clamp, for use with a power tool having a reciprocating spindle, includes a cover rotatably coupled to the spindle and a detent received within a bore of the spindle. The detent is movable in a radial direction relative to a longitudinal axis of the spindle to adjust the blade clamp between a locked configuration and an unlocked configuration. The cover is rotatable between a first rotational position relative to the spindle coinciding with the locked configuration, and a second rotational position relative to the spindle coinciding with the unlocked configuration. The blade clamp further includes a sleeve in which the detent is slidably received. The sleeve includes a non-corrosive material for inhibiting corrosion of the detent.

First claim

What is claimed is:

1. A blade clamp for use with a power tool having a reciprocating spindle, the blade clamp comprising:
a cover rotatably coupled to the spindle;
a detent received within a bore of the spindle, the detent movable in a radial direction relative to a longitudinal axis of the spindle to adjust the blade clamp between a locked configuration and an unlocked configuration,
wherein the cover is rotatable between a first rotational position relative to the spindle coinciding with the locked configuration, and a second rotational position relative to the spindle coinciding with the unlocked configuration; and
a sleeve in which the detent is slidably received, wherein the sleeve includes a non-corrosive material for inhibiting corrosion of the detent.

2. The blade clamp of claim 1 , wherein the sleeve includes an aperture extending therethrough, and wherein the detent is received within the aperture such that a portion of the sleeve surrounds the detent within the bore.

3. The blade clamp of claim 1 , wherein the sleeve is formed of stainless steel.

4. The blade clamp of claim 1 , wherein at least the detent and the cover is nickel plated.

5. The blade clamp of claim 1 , wherein the detent is radially displaceable relative to a longitudinal axis of the spindle by engagement with the cover when the cover is rotated between the first rotational position and the second rotational position.

6. The blade clamp of claim 1 , wherein the cover includes a first ramped surface and a second ramped surface spaced radially inward of the first ramped surface, and wherein a portion of the detent is positioned between the first ramped surface and the second ramped surface when the blade clamp is adjusted between the locked configuration and the unlocked position such that the portion of the detent remains between the first ramped surface and the second ramped surface throughout an entire range of adjustment of the cover between the first rotational position and the second rotational position.

7. The blade clamp of claim 6 , wherein the cover includes a first cover member and a second cover member coupled for co-rotation with the first cover member, and wherein the first ramped surface and the second ramped surface are defined on the first cover member.

8. The blade clamp of claim 6 , wherein the cover includes a first cover member and a second cover member coupled for co-rotation with the first cover member, wherein the first ramped surface is defined on the first cover member, and wherein the second ramped surface is defined on the second cover member.

9. The blade clamp of claim 8 , wherein the first cover member includes a third ramped surface disposed radially inward of the first ramped surface and spaced from the second ramped surface along the longitudinal axis, and wherein a head of the detent is supported upon the second ramped surface and the third ramped surface, with the first ramped surface located radially outward of the head of the detent.

10. The blade clamp of claim 6 , wherein the detent is displaced radially inward relative to the longitudinal axis by the first ramped surface to engage a blade when the blade clamp is adjusted from the unlocked configuration toward the locked configuration.

11. The blade clamp of claim 6 , wherein the detent is displaced radially outward relative to the longitudinal axis by the second ramped surface when the blade clamp is adjusted from the locked configuration toward the unlocked configuration.

12. The blade clamp of claim 1 , further comprising a first spring biasing the cover toward the first rotational position.

13. The blade clamp of claim 12 , further comprising a plunger and a second spring positioned within a blade slot of the spindle, wherein the second spring biases the plunger toward the detent in at least the unlocked configuration for maintaining the blade clamp in the unlocked configuration against the bias of the first spring, and wherein the plunger is displaceable by a blade received within the blade slot against the bias of the second spring.

14. The blade clamp of claim 13 , wherein the rotation of the cover is inhibited by engagement between the plunger and the detent, and wherein, in response to insertion of the blade into the blade slot, the plunger disengages the detent, permitting the first spring to rebound and rotate the cover from the second rotational position to the first rotational position, thereby automatically adjusting the blade clamp from the unlocked configuration to the locked configuration.

15. The blade clamp of claim 13 , wherein at least the first spring and the second spring is nickel plated.

16. The blade clamp of claim 13 , wherein the plunger includes a first portion and a second portion having a larger outer diameter than the first portion, the second portion sized such that a shoulder of the second portion engages an end of the sleeve in the unlocked configuration of the blade clamp, and wherein the end of the sleeve is configured to limit axial movement of the plunger along the longitudinal axis within the blade slot.

17. The blade clamp of claim 1 , wherein the spindle defines a bore, wherein the sleeve includes a cylindrical portion and a flange portion, the cylindrical portion received within the bore, wherein the sleeve is loosely fitted within the bore to allow radial movement of the sleeve relative to the spindle, and wherein the cylindrical portion is sized to move radially within the bore, while the flange portion is sized to limit the radial movement of the sleeve between the cover and the spindle.

18. The blade clamp of claim 1 , wherein the spindle defines a bore, wherein the sleeve includes a cylindrical portion and a flange portion, the cylindrical portion received within the bore, wherein the flange portion is positioned between the cover and the spindle, and wherein the flange portion is sized to inhibit radial movement of the sleeve relative to the spindle such that the sleeve is radially secured within the bore.

Assignees

• Milwaukee Electric Tool Corp

Inventors

• Cholst Beth E
• Thorson Troy C
• Banholzer Hans T

Classifications

• B23D49/14

  Pad saws {(B23D49/105, B23D49/11, B23D49/16 take precedence)} · CPC title

• B23D49/162

  Pad sawing devices · CPC title

• B23D51/10 Primary

  for hand-held or hand-operated devices · CPC title

• B27B19/02

  Saws with a power- driven blade chucked at both ends or at one end only, e.g. jig saws, scroll saws (B27B19/10 takes precedence) · CPC title

• B23D51/08

  of devices for mounting straight saw blades or other tools · CPC title