Patent US3571874A successfully refreshed from Google Patents.
US3571874A
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US
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Descaling device
Assignee: VON ARZ AG
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Filing: 1969-05-28
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Granted: 1971-03-23
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Expires: 1989-05-28
Abstract
Abstract A descaling, derusting, deslagging or metal cleaning device of the compressed air gun type which is supplied with compressed air through its handle and such handle is pivotally mounted on the device and capable of being swung not only into the usual positions but also into a position at a small angle to the barrel assembly of the device so as to enable the device to be used in confined and other places of difficult access.
Inventors
- 👤 Paul Von Arz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:31
CPC Classifications
B; B25; B25F; B25F5/00; B25F5/02; B08; B08B; B08B7/00; B08B7/02; B08B7/022; B25D; B25D2250/00; B25D2250/275; B25D2250/285; B25D2250/291; Y; Y10; Y10T; Y10T29/00; Y10T29/45; Y10T29/4572; Y10T29/4578; Y10T29/4594
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
161 words
An air-operated descaling device according to claim 1 in which the pivotal mounting includes a lateral extension projecting from one side of the barrel assembly, an extension projecting lengthwise from the inner end of the handle, said extensions having flat interengaging surfaces and a common crosswise bore, a pivot pin closely fitting said bore having a head on one end and a nut threaded on the opposite end for clamping said faces in airtight swinging engagement, the air passage in said handle communicating with a circular groove in said handle extension and surrounding the pivot pin, an air passage in the lateral extension on the barrel assembly connecting at its inner end with the circular air passage within the barrel assembly and connecting at its opposite end with a second circular groove in said lateral extension and surrounding the pivot pin, and at least one air passage formed in the surface of said pivot pin and interconnecting said two circular grooves.
References Cited (Backward Citations)
US848459A
Cited
US1874220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |