Ratchet adapter for strap tensioner

• US 8,967,595 B2
• Filed: 06/10/2013
• Issued: 03/03/2015
• Est. Priority Date: 06/10/2013
• Status: Active Grant

• Current Assignee: Strong Yun Industrial Co., Ltd.
• Original Assignee: Strong Yun Industrial Co., Ltd.
• Inventors: Chou, Yeh-Chien
• Primary Examiner(s): GILBERT, WILLIAM V
• Application Number:
  US13/913,545
• Publication Number:
  US 20140360294A1
• Time in Patent Office: 631 Days
• Field of Search: 74/88, 24/68.CD, 24/69.CT, 81/60, 254/100, 254/105, 254/112, 254/217, 254/218, 254/222, 254/223, 254/239, 254/240, 254/247
• US Class Current: 254/223
• CPC Class Codes: B25B 25/00 Implements for fastening, connecting or tensioning of wire or strip
• CPC Class Codes: B60P 7/083 Tensioning by repetetive movement of an actuating member
• CPC Class Codes: F16H 19/08 for interconverting rotary motion and oscillating motion
• CPC Class Codes: F16H 31/002 Hand-driven ratchets wrenches of the ratchet type B25B13/46
• CPC Class Codes: Y10T 24/2175 Cargo tie down
• CPC Class Codes: Y10T 74/1856 Reciprocating or oscillating to intermittent unidirectional motion

Abstract

An adapter for coupling a lever to continuously unidirectionally drive a strap fastener is disclosed. The adapter includes a U-shaped frame with two free ends and a junction. The two free ends are separately provided with two shaft holes. Two sliding slots are separately formed near the shaft holes. A lever hole is formed at the junction. A ratchet shaft has an outer section with a radial hole and an inner section inserted in the shaft holes. A bolt is inserted into the radial hole. A ratchet is mounted around the ratchet shaft. A pawl is slidably disposed between the two sliding slots for engaging with the ratchet. A spring stopper is fixed between two sides of the frame. A spring is compressively arranged between the pawl and spring stopper. A holed plate is fixed between the spring stopper and the junction.

Claims

1. A ratchet adapter for a strap fastener, comprising:

a frame, being of a U-shaped body having a junction and two sides, each side having a free end, each free end being separately provided with a shaft hole, a sliding slot being separately formed near each of the respective shaft holes, and a lever hole being formed at the junction;

a ratchet shaft, having an outer section with a radial hole and an inner section axially inserted in the shaft holes;

a bolt, inserted into the radial hole;

a ratchet, integratedly mounted around the ratchet shaft;

a pawl, slidably disposed between the two sliding slots of the frame for engaging with the ratchet, and having a tongue toward the junction;

a spring stopper, fixed between the two sides of the frame;

a spring, compressively arranged between the tongue of the pawl and the spring stopper to make the pawl flexibly movable within the sliding slots; and

a holed plate, fixed between the spring stopper and the junction, and having an inserting hole coaxial with the lever hole.

2. The ratchet adapter of claim 1, wherein an edge of the lever hole is formed with a reinforcement wall.

3. The ratchet adapter of claim 1, wherein the inner section is formed with two parallel planes, and an outer end of the inner section is axially disposed with a central threaded hole so that the ratchet shaft is fastened on one of the sides by screwing a screw into the central threaded hole.

4. The ratchet adapter of claim 1, wherein the bolt is formed with a bar having a first diameter and a head having a second diameter that is greater than the first diameter.

5. The ratchet adapter of claim 4, wherein the bar is disposed with a retractable ball.

6. The ratchet adapter of claim 1, wherein the ratchet is two in number, and the two ratchets are separately located outside the two sides of the frame, a sleeve is sandwiched between the two sides and the two ratchets, and each of the ratchets is formed with a central hole having a shape corresponding to the inner section of the ratchet shaft.

7. The ratchet adapter of claim 1, wherein the spring stopper is formed with a central recess toward the tongue, and one end of the spring is received in the central recess.

8. The ratchet adapter of claim 1, wherein the inserting hole is less than the lever hole in diameter.