Walter J Kiefer

US Patent:

45466769, Oct 15, 1985

Filed:

Apr 16, 1984

Appl. No.:

6/600887

Inventors:

Walter J. Kiefer - Bothell WA

Assignee:

Kiefer Tool Co., Inc. - Costa Mesa CA

International Classification:

B25B 1300

US Classification:

81 581

Abstract:

A torque-multiplying hand wrench incorporating the features of a standard ratchet wrench along with a lever action torque multiplying feature. A torque multiplying lever arm is attached to a cam element, the eccentric of which acts upon yoke-shaped actuator when the lever arm is rotated. The actuator interacts with a standard ratchet device to apply torque to a threaded fastener. The handle of the wrench acts either as a standard ratchet wrench handle or as a reaction arm in conjunction with use of the torque multiplying lever arm.

US Patent:

48089761, Feb 28, 1989

Filed:

Jun 27, 1988

Appl. No.:

7/211760

Inventors:

Walter J. Kiefer - Seattle WA
Michael R. Cross - Everett WA

Assignee:

Kiefers, Ltd. - Lynnwood WA

International Classification:

G08B 2100

US Classification:

340665

Abstract:

A torsion member (12) has opposing protruding end elements (4, 6) configured for transmitting torque therebetween. A first contact mechanism (20, 26) is mounted to a surface (10) of one end (4) of the torsion member (12). The first contact mechanism includes a movable contact (26') disposed between the end elements (4, 6) of the torsion member. A second contact mechanism (18, 28) is mounted to a surface (11) of the other end element (6) of the torsion member (12). The second contact mechanism includes a movable contact (28') disposed near the first contact (26'). The first contact (26') and second contact (28') move toward each other whenever torsion is applied to the torsion member (12). Means (30, 40) are provided for changing the distance between the first and second contacts (26', 28'), and for producing a signal whenever the first and second contacts touch.