Tape rule with an elaborate buffer

Details Tape rule with an elaborate buffer Tape rule with an elaborate buffer

1999-01-28

2000-11-21

Hirshfeld, Andrew H.

Geometrical instruments

Distance measuring

By flexible tape

33755, 33761, G01B 310

Patent

active

061485349

ABSTRACT:
Disclosed herein is a tape rule with an elaborate buffer comprising a tape, a tape rule housing, and a buffer, wherein the buffer together with its buffer block and strut is formed as a whole piece and installed in the housing, and combined with the housing to form a gate in the opening making the tape able to pass therethrough either extending out of or retracting into the housing. During the retraction of the tape, a hook provided at the tip of the tape is detained by the buffer and backlashing forces are transmitted to the buffer. In this manner impact force is absorbed by the buffer to avert damaging the tape hook or even tearing the tape thereby protecting the accuracy of measurement and ensuring durability of the tape rule. Further to this, by virtue of buffer's whole piece structure, the manufacturing process and assembly procedure of the tape rule can be simplified thereby improving its productivity and minimizing production cost.

REFERENCES:
patent: 3905114 (1975-09-01), Rutty
patent: 4479617 (1984-10-01), Edwards
patent: 4748746 (1988-06-01), Jacoff
patent: 5210956 (1993-05-01), Knispel et al.
patent: 5395069 (1995-03-01), Chen
patent: 5699623 (1997-12-01), Lee
patent: 5791581 (1998-08-01), Loeffler et al.

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