Snap-on pad for chuck key

• US 4,718,797 A
• Filed: 12/07/1981
• Issued: 01/12/1988
• Est. Priority Date: 12/07/1981
• Status: Expired due to Fees

• Current Assignee: John R. Purviance
• Original Assignee: John R. Purviance
• Inventors: Purviance, John R.
• Primary Examiner(s): BILINSKY, ZENON
• Application Number:
  US06/327,841
• Time in Patent Office: 2,227 Days
• Field of Search: 408/241 R, 279/1 K, 81/90 A, 81/177 D, 81/177 ST, 81/177 R, 81/16, 16/114 R, 16/DIG. 18, 16/DIG. 19, 16/DIG. 25, 145/61 L, 145/65, 145/61 C, 29/453, 403/17, 74/543
• US Class Current: 408/241.00R
• CPC Class Codes: B23B 45/006 Keys for operating the chucks
• CPC Class Codes: B25B 33/005 Chuck keys
• CPC Class Codes: B25G 3/34 by pressing the handle on the implements; using cement or molten metal, e.g. casting, moulding, by welding or the like
• CPC Class Codes: Y10T 279/3431 Chuck key
• CPC Class Codes: Y10T 408/96 Miscellaneous

Abstract

A chuck key pad (10) disclosed has a unitary construction that is snapped onto an associated chuck key to permit application of a greater torque than would otherwise be possible during tightening and loosening of a chuck. The pad (10) includes a body (28) having a central hole (30) that receives the conventinal shaft of the chuck key and also includes spaced retainers (32) that engage the chuck key handle on opposite sides of its shaft upon mounting such that locking portions (34) of the retainers resiliently deflect over the handle with a snap action. In its preferred construction, the pad body (28) includes a central portion (36) defining the shaft hole (30) and also includes a pair of opposite end portions (38) including spaced pairs of the retainers (32). An elongated groove (40) extends through the central portion (36) and the end portions (38) of the pad to receive the key handle. Spaced surfaces (42) of the locking portions (34) converge toward the groove (40 ) to permit the snap action mounting as pressure is applied between the pad and the key upon mounting. One embodiment of the pad includes generally flat gripping surfaces (44) on the body, while another embodiment includes curved gripping surfaces (46) that define oppositely facing depressions on each side of the key shaft.

Claims

1. A pad for mounting on a chuck key of the type including a shaft having a gear and a handle extending in opposite directions from the shaft to permit manual application of torque for rotating the key about the shaft, said pad comprising:

a unitary body of resilient material;

said body having an elongated shape that extends transversely to the shaft upon mounting thereon;

said body including a central hole that receives the shaft of the chuck key upon mounting thereon;

the body also including spaced retainers that engage the handle of the chuck key on opposite sides of the shaft thereof upon mounting thereon; and

the retainers including locking portions that resiliently deflect over the handle of the key upon mounting thereon so as to cooperate with the hole in locating the pad on the key.

2. A pad as in claim 1 wherein the unitary body includes a central portion defining the hole and also includes a pair of opposite end portions having spaced pairs of the retainers, and the body including an elongated groove extending through the central portion and the end portions thereof so as to receive the handle of the chuck key as the pad is mounted on the key.

3. A pad as in claim 2 wherein the locking portions of each pair of spaced retainers include spaced surfaces that converge toward the groove that receives the handle of the key upon mounting.

4. A pad as in claims 1, 2, or 3 wherein the unitary body includes generally flat gripping surfaces.

5. A pad as in claims 1, 2, or 3 wherein the unitary body includes curved gripping surfaces that define a pair of oppositely facing depressions on each side of the central hole that receives the chuck key shaft upon mounting of the pad on the key.

6. A pad for mounting on a chuck key of the type including a shaft having a gear and a handle extending in opposite directions from the shaft to permit manual application of torque for rotating the key about the shaft, said paid comprising:

a unitary plastic body including a central portion having a central hole that receives the shaft of the chuck key upon mounting thereon;

said body having an elongated shape that extends transversely to the shaft upon mounting thereon;

the body also including a pair of end portions each of which includes a pair of spaced retainers that engage the handle of the chuck key on one side of the shaft thereof upon mounting thereon;

each pair of retainers including locking portions that resiliently deflect over the handle of the key upon mounting thereon so as to cooperate with the hole in locating the pad on the key; and

the body including an elongated groove extending through the central portion and the end portions thereof so as to receive the handle of the chuck key as the pad is mounted on the key.