US5113949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tightening control apparatus for a torque wrench
Assignee: FUJI KUUKI 1-14 KAMIJI 2-CHOME HIGASHINARIKU OSAKA-SHI OSAKA JAPAN KK
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Filing: 1989-07-31
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Granted: 1992-05-19
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Expires: 2009-07-31
Abstract
Abstract Disclosed is a tightening control apparatus for a torque wrench including a pressure detecting device for detecting an admission pressure supplied to a torque wrench. A pressure change detecting device determines a change in pressure detected by the pressure detecting device. A striking signal output device outputs a striking signal when the change reaches a reference value.
Inventors
- 👤 Masaaki Ohkubo
- 👤 Ryo Fukada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:25
CPC Classifications
B; B25; B25B; B25B23/00; B25B23/14; B25B23/145; B25B23/1456; B25B23/1453
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
141 words
A tightening control apparatus for a torque wrench comprising: a pressure detecting means for detecting an admission pressure supplied to a torque wrench; a pressure change detecting means for detecting a change in admission pressure detected by said pressure detecting means; a striking signal output means for outputting a striking signal when the change in pressure reaches a reference value, wherein said striking signal output means continuously outputs said striking signal for a predetermined period of time after said change reaches the reference value, and said predetermined period of time is set shorter than a striking interval; a counter for counting said striking signal and for outputting a tightening end signal when a count value reaches a set value; and an admission stop means for closing an admission pressure path to said torque wrench upon reception of said tightening end signal.
Claim 2
Dependent Claim
141 words
A tightening control apparatus for a torque wrench comprising: a pressure detecting means for detecting an admission pressure supplied to a torque wrench; a pressure change detecting means for detecting a change in admission pressure detected by said pressure detecting means; a striking signal output means for outputting a striking signal when the change in pressure reaches a reference value, wherein said striking signal output means continuously outputs said striking signal for a predetermined period of time after said change reaches the reference value, and said predetermined period of time is set shorter than a striking interval; a counter for counting said striking signal and for outputting a tightening end signal when a count value reaches a set value; and an admission stop means for closing an admission pressure path to said torque wrench upon reception of said tightening end signal.
Claim 3
Dependent Claim
149 words
A tightening control apparatus for a torque wrench comprising: a pressure detecting means for detecting an admission pressure supplied to a torque wrench; a pressure change detecting means for detecting a change in admission pressure detected by said pressure detecting means; a striking signal output means for outputting a striking signal when the change in pressure reaches a reference value, wherein said striking signal output means continuously outputs said striking signal for a predetermined period of time after said change reaches the reference value, and said predetermined period of time is set greater than said striking interval; a timer for measuring a time during a which said striking signal is continuously output and for outputting a tightening end signal when said measured time reaches a set time; and an admission stop means for closing an admission pressure path to said torque wrench upon reception of said tightening end signal.
Claim 4
Dependent Claim
149 words
A tightening control apparatus for a torque wrench comprising: a pressure detecting means for detecting an admission pressure supplied to a torque wrench; a pressure change detecting means for detecting a change in admission pressure detected by said pressure detecting means; a striking signal output means for outputting a striking signal when the change in pressure reaches a reference value, wherein said striking signal output means continuously outputs said striking signal for a predetermined period of time after said change reaches the reference value, and said predetermined period of time is set greater than said striking interval; a timer for measuring a time during a which said striking signal is continuously output and for outputting a tightening end signal when said measured time reaches a set time; and an admission stop means for closing an admission pressure path to said torque wrench upon reception of said tightening end signal.
Claim 5
Independent Claim
26 words
The apparatus according to claims 1 or 2, wherein said apparatus further comprises a signal output time altering means for altering said predetermined period of time.
Claim 6
Independent Claim
35 words
An apparatus according to claims 1 or 2 further comprising a counter means for counting said tightening end signal and for outputting a predetermined-number tightening end signal when a count value reaches a set number.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-05-19 | 1995-11-18 | 1996-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-19 | 1999-11-18 | 2000-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-19 | 2003-11-18 | 2004-05-19 | $7700.00 | Window Closed / Lapsed |