Patent US3850055A successfully refreshed from Google Patents.
US3850055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fastener tool
Assignee: Expando Products Co
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Filing: 1973-09-21
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Granted: 1974-11-26
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Expires: 1993-09-21
Abstract
Abstract A fastener tool for securing members together with a fastener that has an outer member to be solidly held and an inner member to be turned. The tool has a fixed outer housing with automatic gripping means therein and an inner rotating member configured to engage the inner member of the fastener and to be power driven through a torque clutch.
Inventors
- 👤 L Triplett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:52
CPC Classifications
B; B25; B25B; B25B27/00; B25B27/0007; B25B27/0014
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
150 words
A fastener tool comprising a housing; a motor in said housing; an inner gripping means for engaging an inner head of a fastener; means connecting said inner gripping means to said motor, whereby operation of said motor rotates said inner gripping means, said means including clutch means having a pair of clutch plates biased into driving engagement one with the other; switch means carried by the housing for starting and stopping said motor means; and an outer gripping means carried by said housing and surrounding said inner gripping means, said outer gripping means being adapted to engage and hold an outer member of a fastener that is received and turned by said inner gripping member and including a spring coiled in the direction of rotation of the inner gripping means, said spring surrounding and spaced from the inner gripping means and having one end fixed with respect to said housing.
Claim 2
Dependent Claim
150 words
A fastener tool comprising a housing; a motor in said housing; an inner gripping means for engaging an inner head of a fastener; means connecting said inner gripping means to said motor, whereby operation of said motor rotates said inner gripping means, said means including clutch means having a pair of clutch plates biased into driving engagement one with the other; switch means carried by the housing for starting and stopping said motor means; and an outer gripping means carried by said housing and surrounding said inner gripping means, said outer gripping means being adapted to engage and hold an outer member of a fastener that is received and turned by said inner gripping member and including a spring coiled in the direction of rotation of the inner gripping means, said spring surrounding and spaced from the inner gripping means and having one end fixed with respect to said housing.
Claim 3
Dependent Claim
88 words
A fastener tool as in claim 1, wherein the inner gripping means is positioned for rotation within the spring of the outer gripping means and further including means for holding the inner gripping means against reciprocation within the housing; and wherein the clutch plates comprise a fixed cone member secured to and rotatable with the inner gripping means and a cooperating movable cone member having a surface adapted to engage the fixed cone member and reciprocable but held against rotation on a shaft drivingly coupled to the motor.
Claim 4
Dependent Claim
52 words
A fastener as in claim 2, wherein the means biasing the clutch plates into driving engagement with one another comprises an expansion spring surrounding the shaft drivingly coupled to the motor, one end of said spring engaging the movable cone member and the other end engaging a nut threaded on said shaft.
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) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |