US3688337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scraping device for removing the surface of precoat layer in the precoat-type rotary drum vacuum filter
Assignee: Ishigaki Mechanical Industry Co Ltd
•
Filing: 1970-12-08
•
Granted: 1972-09-05
•
Expires: 1990-12-08
Abstract
Abstract A scraping device for removing the surface of precoat layer in the precoat-type rotary drum vacuum filter wherein carriages for a scraping blade are mounted on the machine- or filter-frame in such a manner that said carriages can be moved in the forward and backward directions toward the rotary drum and in the left and right directions along the axis of the drum, and said carriages are reciprocated in the latter directions in connection with the advancing movement of the carriages by suitable driving means and a cooperatively moving device whereby the scraping blade is reciprocated along the axis of the rotary drum when the blade is advanced toward the drum so as to scrape off the surface of the precoat layer smoothly.
Inventors
- 👤 Ichiro Noda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:33
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/44; B01D33/46; B01D33/466; B01D33/06; B01D33/073
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
255 words
A scraping device for removing the surface of precoat layer in a precoat-type rotary drum vacuum filter having a frame, comprising a blade carriage and a scraping blade carried by the blade carriage and having a scraping edge extending parallel to the axis of the rotary drum, first support means on the frame for supporting the blade carriage for straight slidable movement parallel to the axis of the rotary drum, second support means on the frame for supporting the blade carriage for straight slidable movement parallel to a plane extending perpendicularly to the axis of the rotary drum, driving means for advancing the blade carriage and the blade along the second support means toward the rotary drum, and reciprocating means operatively connected to the blade carriage and to the driving means for reciprocating the blade carriage on the first support means parallel to the axis of the rotary drum when the driving means advances the carriage on the second support means, the driving means including a rotary drive shaft rotatably mounted on the frame and connected to the blade carriage, advancing means on the shaft for advancing the blade carriage along the second support means toward the rotary drum as the drive shaft rotates in one direction, the reciprocating means including a rod pivotally connected to the blade carriage and eccentric means connecting the rod to the drive shaft, the eccentric means reciprocating the rod as the drive shaft rotates in said one direction whereby the blade carriage is reciprocated on the first support means.
Claim 2
Dependent Claim
255 words
A scraping device for removing the surface of precoat layer in a precoat-type rotary drum vacuum filter having a frame, comprising a blade carriage and a scraping blade carried by the blade carriage and having a scraping edge extending parallel to the axis of the rotary drum, first support means on the frame for supporting the blade carriage for straight slidable movement parallel to the axis of the rotary drum, second support means on the frame for supporting the blade carriage for straight slidable movement parallel to a plane extending perpendicularly to the axis of the rotary drum, driving means for advancing the blade carriage and the blade along the second support means toward the rotary drum, and reciprocating means operatively connected to the blade carriage and to the driving means for reciprocating the blade carriage on the first support means parallel to the axis of the rotary drum when the driving means advances the carriage on the second support means, the driving means including a rotary drive shaft rotatably mounted on the frame and connected to the blade carriage, advancing means on the shaft for advancing the blade carriage along the second support means toward the rotary drum as the drive shaft rotates in one direction, the reciprocating means including a rod pivotally connected to the blade carriage and eccentric means connecting the rod to the drive shaft, the eccentric means reciprocating the rod as the drive shaft rotates in said one direction whereby the blade carriage is reciprocated on the first support means.
Claim 3
Dependent Claim
49 words
The scraping device of claim 1 in which the eccentric means includes a cylinder having an eccentric bore which receives the drive shaft, the cylinder being secured against rotational movement relative to the drive shaft, the rod including a ring at one end thereof which rotatably receives the cylinder.
Claim 4
Dependent Claim
31 words
The scraping device of claim 1 in which the advancing means on the shaft includes screw threads on the shaft which are threadedly engaged with screw threads on the blade carriage.
Claim 5
Dependent Claim
32 words
The scraping device of claim 1 including a clutch operatively connecting the drive shaft to a forwardly driving source with a reduced speed and a rearwardly driving source with a high speed.
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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |