US4648258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Breakstem fastener installation tool
Assignee: Avdel UK Ltd
•
Filing: 1986-05-07
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Granted: 1987-03-10
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Expires: 2006-05-07
Abstract
Abstract A hand-held rivet installation tool is provided with an airflow ejector (23, 26, 28) to eject broken off rivet stems. The tool has a base (71) on which it can stand on a level surface. A valve (73) is provided with its actuating plunger (75) protruding from the base. When the tool is standing on its base, the plunger (75) is pushed in and the valve (73) shuts off the air supply to the ejector. When the tool is picked up again the valve (73) stays in the off position until the tool-actuating trigger (31) is operated again. Thus needless waste of air through the ejector, when the tool is not being used, is eliminated.
Inventors
- 👤 William H. Frearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:09
CPC Classifications
B; B21; B21J; B21J15/00; B21J15/10; B21J15/105; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53709; Y10T29/53717; Y10T29/53726; Y10T29/5373; Y10T29/53739; Y10T29/53743; Y10T29/53748; Y10T29/5377
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
69 words
A hand held fastener installation tool including an airflow ejector, which tool is arranged to stand, when not being held by the operator, in a stable position on a supporting surface, the tool including automatic shut-off means, responsive to the proximity of the tool to the supporting surface, for automatically shutting off the supply of air to the ejector when the hand-held tool is standing on the supporting surface.
Claim 2
Dependent Claim
69 words
A hand held fastener installation tool including an airflow ejector, which tool is arranged to stand, when not being held by the operator, in a stable position on a supporting surface, the tool including automatic shut-off means, responsive to the proximity of the tool to the supporting surface, for automatically shutting off the supply of air to the ejector when the hand-held tool is standing on the supporting surface.
Claim 3
Dependent Claim
43 words
A tool as claimed in claim 1, in which the shut-off means is arranged to maintain shut-off of the air supply to the ejector, after the tool has been removed from the supporting surface, until the tool is actuated to instal a fastener.
Claim 4
Dependent Claim
42 words
A tool as claimed in claim 2, including an air valve which is operated when the tool is actuated to instal a fastener, and in which re-connection of the air supply to the ejector is actuated by operation of the air valve.
Claim 5
Dependent Claim
45 words
A tool as claimed in claim 1, which tool includes a base for contacting the supporting surface, and in which the automatic shut-off means includes a member normally projecting from the base and movable, on contact with the supporting surface, to actuate the shut-off means.
Claim 6
Dependent Claim
16 words
A tool as claimed in claim 1, in which the automatic shut-off means is readily defeatable.
Claim 7
Dependent Claim
29 words
A tool as claimed in claim 5, in which the automatic shut-off means is readily removable from the tool so that a blank member can be substituted for it.
References Cited (Backward Citations)
US4122904A
Cited
US4211353A
Cited
US4515005A
Cited
US4452387A
Cited
US4549681A
Cited
US4598571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-09 | 1990-09-08 | 1991-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-09 | 1994-09-08 | 1995-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-09 | 1998-09-08 | 1999-03-10 | $7700.00 | Window Closed / Lapsed |