A tool, such as a tape measure, including a spring-based retraction system is shown. The spring-based retraction system is driven by a spiral spring, that has a variable preformed stress profile along the length of the spring.

A tool, such as a tape measure, including a spring-based retraction system is shown. The spring-based retraction system is driven by a spiral spring, that has a variable preformed stress profile along the length of the spring.

A tape measure including an elongate tape blade is shown. The tape measure includes a relatively short protective polymer film coupled to an end of the tape blade adjacent to the hook end of the tape blade.

A tape measure including an elongate tape blade is shown. The tape measure includes a relatively short protective polymer film coupled to an end of the tape blade adjacent to the hook end of the tape blade.

A tape measure device for measuring pipes includes a spring return positioned in a housing. A tape is engaged to and is loopedly positioned around the spring return. The tape is selectively extensible from a front of the housing via a slot. A recess in a bottom of the housing extends from the front to a back and to proximate to the slot. A hook engaged to a second end of the tape can selectively engage a terminus of a substrate, enabling a user grasping the housing in a hand to extend the tape along the substrate. Indicia on the tape allow measurement of a distance from the second end of the tape. A fastener on the bottom of the housing can selectively engage the substrate to removably engage the housing to the substrate so that the user can release the housing.

A tape measure device for measuring pipes includes a spring return positioned in a housing. A tape is engaged to and is loopedly positioned around the spring return. The tape is selectively extensible from a front of the housing via a slot. A recess in a bottom of the housing extends from the front to a back and to proximate to the slot. A hook engaged to a second end of the tape can selectively engage a terminus of a substrate, enabling a user grasping the housing in a hand to extend the tape along the substrate. Indicia on the tape allow measurement of a distance from the second end of the tape. A fastener on the bottom of the housing can selectively engage the substrate to removably engage the housing to the substrate so that the user can release the housing.

A tool, such as a tape measure, including a spring-based retraction system is shown. The retraction system utilizes an epicyclic gear train coupled between the tape blade winding reel and a rotating arbor or axle within the tape measure. A spiral spring has an outer end coupled to the reel and an inner end coupled to the axle. The gear train may be a reduction gear train such that the axle rotates slower than the reel. By coupling the spiral spring between the gear train input and gear train output, high energy density springs may be used, which may allow for decrease in housing size, increase in tape length or thickness for a given housing size, and/or advantageous retraction speed control.

A tool, such as a tape measure, including a spring-based retraction system is shown. The retraction system utilizes an epicyclic gear train coupled between the tape blade winding reel and a rotating arbor or axle within the tape measure. A spiral spring has an outer end coupled to the reel and an inner end coupled to the axle. The gear train may be a reduction gear train such that the axle rotates slower than the reel. By coupling the spiral spring between the gear train input and gear train output, high energy density springs may be used, which may allow for decrease in housing size, increase in tape length or thickness for a given housing size, and/or advantageous retraction speed control.

A utility knife includes a body having a front end and a rear end opposite the front end. A blade holder, supported by the body, is moveable relative to the body, to move a blade between an extended position and a retracted position. The blade extends through a blade aperture when in the extended position. The blade aperture is sized to receive a hook attached to the blade of a tape measure.

A utility knife includes a body having a front end and a rear end opposite the front end. A blade holder, supported by the body, is moveable relative to the body, to move a blade between an extended position and a retracted position. The blade extends through a blade aperture when in the extended position. The blade aperture is sized to receive a hook attached to the blade of a tape measure.