US3700122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pusher-type furnace
Assignee: Maschinen und Werkzeugbau GmbH
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Filing: 1970-10-01
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Granted: 1972-10-24
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Expires: 1990-10-01
Abstract
Abstract A pusher-type furnace for the heating of metal ingots, blooms, billets or bars to rolling temperature, is provided at its inlet side with a billet-receiving platform or table upon which a pusher assembles one or more billets for advance into the furnace by a main pusher, the latter serving simultaneously to displace the entire array of workpieces and advance one or more of the latter out of the furnace.
Inventors
- 👤 Theodor Josef Sevenich
- 👤 Wolfgang Fabian
- 👤 Klaus Kuhn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:36
CPC Classifications
F; F27; F27D; F27D3/00; F27D3/04; F27B; F27B9/00; F27B9/30; F27B9/38; F27B9/14; F27B9/20; F27B9/22; F27D2003/0034; F27D2003/0042; F27M; F27M2001/00; F27M2001/15; F27M2001/1539; F27M2001/1547; F27M2001/1552
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
218 words
A pusher-type furnace installation comprising: a pusher-type furnace having an inlet at one end and an outlet at another end thereof and provided with means for supporting a succession of workpieces in contiguous relationship within said furnace; a collecting table ahead of said inlet; feed-pusher means for advancing a plurality of workpieces onto said table in the longitudinal direction of said furnace; and main pusher means for simultaneously advancing the workpieces onto said table into said furnace while shifting the workpieces therein a corresponding distance said outlet, said main pusher means comprising: a main pusher bar reciprocable in said direction, first drive means operably connected with said main pusher bar, a pivotal pawl on said main pusher bar adapted to ride over workpieces on said table and to lock upon advance of said mapusher bar in the direction of said inlet; said feed-pusher means including: a feed-pusher bar reciprocable in said direction, second drive means operable independently of said first drive means and connected to said feed-pusher bar for reciprocating same during reciprocation of said main pusher bar, and a pivotal pawl on said feed-pusher bar adapted to ride over workpieces upon displacement of said feed-pusher bar away from said inlet and to engage the workpieces upon advance of the feed-pusher bar in the direction of said inlet.
Claim 2
Dependent Claim
218 words
A pusher-type furnace installation comprising: a pusher-type furnace having an inlet at one end and an outlet at another end thereof and provided with means for supporting a succession of workpieces in contiguous relationship within said furnace; a collecting table ahead of said inlet; feed-pusher means for advancing a plurality of workpieces onto said table in the longitudinal direction of said furnace; and main pusher means for simultaneously advancing the workpieces onto said table into said furnace while shifting the workpieces therein a corresponding distance said outlet, said main pusher means comprising: a main pusher bar reciprocable in said direction, first drive means operably connected with said main pusher bar, a pivotal pawl on said main pusher bar adapted to ride over workpieces on said table and to lock upon advance of said mapusher bar in the direction of said inlet; said feed-pusher means including: a feed-pusher bar reciprocable in said direction, second drive means operable independently of said first drive means and connected to said feed-pusher bar for reciprocating same during reciprocation of said main pusher bar, and a pivotal pawl on said feed-pusher bar adapted to ride over workpieces upon displacement of said feed-pusher bar away from said inlet and to engage the workpieces upon advance of the feed-pusher bar in the direction of said inlet.
Claim 3
Dependent Claim
27 words
The installation defined in claim 1 wherein said first and second drive means and said main pusher bar and feed-pusher bar are mounted in a common structure.
Claim 4
Dependent Claim
21 words
The installation defined in claim 1 wherein said feed-pusher bar is reciprocated at a higher speed than said main puSher bar.
Claim 5
Dependent Claim
24 words
The installation defined in claim 1 wherein a gravity roller conveyor is provided adjacent said table for delivering said workpieces to said feed-pusher 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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |