Ratcheting mechanism

• US 7,413,065 B2
• Filed: 12/27/2006
• Issued: 08/19/2008
• Est. Priority Date: 01/16/2002
• Status: Expired due to Term

• Current Assignee: Gauthier Biomedical, Inc.
• Original Assignee: Gauthier Biomedical, Inc.
• Inventors: Gauthier, Michael T.
• Primary Examiner(s): Lorence; Richard M
• Application Number:
  US11/645,942
• Publication Number:
  US 20070102255A1
• Time in Patent Office: 601 Days
• Field of Search: 192/43.1, 81/62
• US Class Current: 192/43.1
• CPC Class Codes: B25B 13/463 a pawl engaging an externally toothed wheel
• CPC Class Codes: B25B 15/04 with ratchet action
• CPC Class Codes: F16D 41/084 the intermediate coupling members wedging by pivoting or rocking
• CPC Class Codes: F16D 41/12 with hinged pawl co-operating with teeth, cogs, or the like F16D41/02, F16D41/24 take precedence
• CPC Class Codes: F16D 41/16 the action being reversible

Abstract

A ratcheting mechanism for a hand-held tool is provided. The mechanism includes a housing having a central opening and a pair of slots disposed on opposite sides of the opening. Each slot has an arcuate or circular end portion opposite the central opening which circumscribes an arc of greater than 180° in order to pivotally retain a generally circular stem of a pawl therein. Due to the presence of a pair of biasing members within the housing, each pawl is biased inwardly towards the central opening and into engagement with teeth located on the exterior of a gear rotatably disposed within the central opening. A cap rotatably connected to the housing over the pawls and the central opening is able to selectively disengage one of the pawls to allow the rotation of the gear within the central opening in a specified direction.

Claims

1. A ratcheting mechanism for a tool, the ratcheting mechanism comprising:

(a) a housing including at least one slot including a generally arcuate end and an open end disposed generally opposite the arcuate end;

(b) at least one pawl disposed within the at least one slot, the at least one pawl including a generally circular stem at one end that is rotatably engaged within and retained by the arcuate end of the at least one slot;

(c) at least one biasing member engaged with the at least one pawl to bias the at least one pawl inwardly.

(d) a cap rotatably connected to the housing, the cap including at least one recess aligned with and disposed at least partially above the at least one slot in the housing and including an engagement surface engageable with the at least one pawl to selectively move the at least one pawl outwardly against the bias of the at least one biasing member.

2. The mechanism of claim 1 wherein the at least one recess further includes a stop surface spaced from the engagement surface and engageable with the housing to limit the rotation of the cap with respect to the housing.

3. The mechanism of claim 2 wherein the housing further includes at least one stop member extending outwardly from the housing and engageable with the stop surface of the at least one recess to limit the rotation of the cap with respect to the housing.

4. The mechanism of claim 3 wherein the at least one stop member is spaced from the at least one slot.

5. The mechanism of claim 1 wherein the at least one biasing member has a first end secured within a bore formed in the housing and spaced from the at least one slot.

6. The mechanism of claim 5 wherein the at least one biasing member extends linearly across the at least one slot into engagement with the at least one pawl.

7. The mechanism of claim 6 wherein a second end of the at least one biasing member engages a rectangular section of the at least one pawl that is secured to the generally circular stem.

8. The mechanism of claim 5 wherein the at least one biasing member extends across the at least one slot generally perpendicularly to the rotational axis of the circular stem of the at least one pawl.