US3844169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power tool torque indicating device
Assignee: Stanley Works
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Filing: 1973-04-18
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Granted: 1974-10-29
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Expires: 1993-04-18
Abstract
Abstract A pneumatic power tool drive mechanism having coaxial drive and driven rotors and an intermediate torsion spring and relatively rotatable in accordance with the transmitted torque. A torque indicating device of the power tool comprises an axially reciprocable and non-rotatable torque scale operator actuated in one axial direction in accordance with the relative angular displacement of the drive and driven rotors to indicate the applied torque and urged in the opposite axial direction to reset the torque scale operator through the engagement of dimples on the torque scale operator with a helical cam on the driven rotor.
Inventors
- 👤 H Whitehouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:36
CPC Classifications
B; B25; B25B; B25B23/00; B25B23/14; B25B23/145; G; G01; G01L; G01L3/00; G01L3/02; G01L3/14; G01L3/1407; G01L3/1414
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
169 words
In a power tool having a rotary drive mechanism with generally coaxial rotary drive and driven members and intermediate torque transmitting means interconnecting the rotary drive and driven members and permitting relative angular displacement thereof in accordance with the torque being transmitted therethrough, a torque indicating device comprising torque indicating means operable for indicating torque, a torque indicator operator for operating the indicating means, the torque indicator operator being reciprocably mounted in association with the drive mechanism for movement in one direction for increasing the torque indication and for movement in the opposite direction for decreAsing the torque indication, first actuator means for actuating the torque indicator operator in said one direction in accordance with said relative angular displacement of the rotary drive and driven members for indicating the torque transmitted through the drive mechanism, and second actuator means operable by the rotation of one of the rotary members for actuating the torque indicator operator in the opposite direction when the indicated torque is greater than the transmitted torque.
Claim 2
Dependent Claim
169 words
In a power tool having a rotary drive mechanism with generally coaxial rotary drive and driven members and intermediate torque transmitting means interconnecting the rotary drive and driven members and permitting relative angular displacement thereof in accordance with the torque being transmitted therethrough, a torque indicating device comprising torque indicating means operable for indicating torque, a torque indicator operator for operating the indicating means, the torque indicator operator being reciprocably mounted in association with the drive mechanism for movement in one direction for increasing the torque indication and for movement in the opposite direction for decreAsing the torque indication, first actuator means for actuating the torque indicator operator in said one direction in accordance with said relative angular displacement of the rotary drive and driven members for indicating the torque transmitted through the drive mechanism, and second actuator means operable by the rotation of one of the rotary members for actuating the torque indicator operator in the opposite direction when the indicated torque is greater than the transmitted torque.
Claim 3
Dependent Claim
65 words
A power tool according to claim 1 wherein the rotary drive and driven members respectively comprise coaxial portions in telescoped relation, and wherein the first actuator means comprises an axially reciprocable slide for actuating the indicator operator in said one direction, and means for axially shifting the slide back and forth in accordance with the relative angular displacement of the rotary drive and driven members.
Claim 4
Dependent Claim
71 words
A power tool according to claim 1 wherein the torque indicator operator is mounted for movement generally parallel to the axis of rotation of the rotary drive and driven members and wherein the second actuator means comprises cam means and follower means interconnecting the indicator operator and said one rotary member and operable to urge the indicator operator in its said opposite direction upon said rotation of said one rotary member.
Claim 5
Dependent Claim
24 words
A power tool according to claim 3 wherein said one rotary member has said cam means and the indicator operator has said follower means.
Claim 6
Dependent Claim
41 words
A power tool according to claim 4 wherein the indicator operator has at least one projection providing said follower means and engageable by the cam means of said one rotary member to urge the indicator operator in its said opposite direction.
Claim 7
Dependent Claim
55 words
A power tool according to claim 4 wherein the indicator operator comprises a generally C-shaped member partially surrounding said one rotary member and the follower means is provided adjacent at least one circumferential end of the C-shaped member. 7.A power tool according to claim 1 wherein said one rotary member is the driven rotary member.
Claim 8
Dependent Claim
138 words
In a power tool having an elongated housing with an indicator window therein, a rotary drive mechanism mounted within the housing having longitudinally spaced generally coaxial rotary drive and driven members and intermediate torque transmitting means comprising spring means interconnecting the rotary drive and driven members, a torque indicating device comprising a torque indicator mounted for axial reciprocable movement within the housing in operative alignment with the indicator window, actuator means for shifting the torque indicator in one axial direction in proportion to the relative angular displacement of the drive and driven members for indicating the torque being transmitted through the drive mechanism, and torque indicator return means interconnecting the torque indicator and one of the rotary members and operable by the rotation of said one rotary member for shifting the torque indicator in the opposite axial direction.
Claim 9
Dependent Claim
138 words
In a power tool having an elongated housing with an indicator window therein, a rotary drive mechanism mounted within the housing having longitudinally spaced generally coaxial rotary drive and driven members and intermediate torque transmitting means comprising spring means interconnecting the rotary drive and driven members, a torque indicating device comprising a torque indicator mounted for axial reciprocable movement within the housing in operative alignment with the indicator window, actuator means for shifting the torque indicator in one axial direction in proportion to the relative angular displacement of the drive and driven members for indicating the torque being transmitted through the drive mechanism, and torque indicator return means interconnecting the torque indicator and one of the rotary members and operable by the rotation of said one rotary member for shifting the torque indicator in the opposite axial direction.
Claim 10
Dependent Claim
57 words
A power tool according to claim 8 wherein the indicator return means is operable by the rotation of said one rotary member for biasing the torque indicator in said opposite axial direction and wherein said actuator means is operable to shift the torque indicator in said one axial direction against the bias of the indicator return means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |