Patent US3565311A successfully refreshed from Google Patents.
US3565311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Strip-lifting apparatus with improved lifting bars
Assignee: Individual
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Filing: 1969-01-09
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Granted: 1971-02-23
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Expires: 1989-01-09
Abstract
Abstract In an apparatus for lifting sheet steel strip into and out of a pickling tank, improved lifting bars formed in an L-shape and having an acid-resistant polypropylene covering surrounding a major portion of the length thereof and an acid-resistant polypropylene sleeve snugly fitted on the covering extending over the lower leg of the bar. The sleeve serves as the bearing surface for the strip and can be simply removed and replaced.
Inventors
- 👤 David L Mitchell Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:45
CPC Classifications
B; B66; B66C; B66C1/00; B66C1/10; B66C1/22; C; C23; C23G; C23G3/00; C23G3/02; C23G3/025
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
250 words
In an apparatus for lifting sheet metal strips from a pickling tank, including an elongated main frame being of sufficient length to span the tank and rest on the top surface of the sidewalls thereof, and a lifting mechanism supported by the main frame for actuating lifting bars to raise and lower strip out of and into the pickling solution contained in the tank, wherein the improvement is in the lifting bars, in which each of the lifting bars comprises: a generally L-shaped main body, one leg of which extends generally parallel to and below the longitudinal axis of said main frame, said one leg having a free inner end lying in a generally vertical plane passing though an intermediate portion of said main frame and an outer end lying in a generally vertical plane passing inwardly adjacent one longitudinal end of said main frame; the other leg of said main body being fixed at one end thereof to said outer end of said one leg, and having means at the other end thereof for removably fixing the main body to said lifting mechanism; a nonmetallic, pickling-solution-resistant cover member snugly surrounding said main body, and having one end disposed inwardly adjacent said other end of said other leg and a closed other end disposed beyond and adjacent to said inner end of said leg; and nonmetallic, pickling-solution-resistant sleeve means removably fixed to and surrounding said cover memBer at the portion thereof extending over said inner end of said one leg.
Claim 2
Dependent Claim
250 words
In an apparatus for lifting sheet metal strips from a pickling tank, including an elongated main frame being of sufficient length to span the tank and rest on the top surface of the sidewalls thereof, and a lifting mechanism supported by the main frame for actuating lifting bars to raise and lower strip out of and into the pickling solution contained in the tank, wherein the improvement is in the lifting bars, in which each of the lifting bars comprises: a generally L-shaped main body, one leg of which extends generally parallel to and below the longitudinal axis of said main frame, said one leg having a free inner end lying in a generally vertical plane passing though an intermediate portion of said main frame and an outer end lying in a generally vertical plane passing inwardly adjacent one longitudinal end of said main frame; the other leg of said main body being fixed at one end thereof to said outer end of said one leg, and having means at the other end thereof for removably fixing the main body to said lifting mechanism; a nonmetallic, pickling-solution-resistant cover member snugly surrounding said main body, and having one end disposed inwardly adjacent said other end of said other leg and a closed other end disposed beyond and adjacent to said inner end of said leg; and nonmetallic, pickling-solution-resistant sleeve means removably fixed to and surrounding said cover memBer at the portion thereof extending over said inner end of said one leg.
Claim 3
Dependent Claim
44 words
The improvement as set forth in claim 1 wherein said sleeve means includes a key portion fixed to said cover member, and a strip-metal-bearing section which fits with said key portion to form a continuous surface surrounding said cover member at said portion thereof.
Claim 4
Dependent Claim
54 words
The improvement as set forth in claim 1 including stop means fixed to said cover member at the region thereof adjacent said outer end of said one leg of said main body for fixing the position of the outer end of said sleeve means with respect to said outer end of said one leg.
Claim 5
Dependent Claim
34 words
The improvement as set forth in claim 1 including nonmetallic, pickling-solution-resistant cap member removably fixed to the said closed other end of said cover member and engaging the inner end of said sleeve means.
Claim 6
Dependent Claim
63 words
The improvement as set forth in claim 1 including a hollow housing snugly received on said main body adjacent said one end of said cover member; said housing having a portion thereof snugly surrounding a section of said cover member adjacent said one end thereof; and pickling-solution-resistant seal ring means disposed around said main body and is sealing abutment with said hollow housing.
Claim 7
Dependent Claim
149 words
In an apparatus for lifting sheet metal strip from a pickling tank, including an elongated main frame being of sufficient length to span the tank and rest on the top surface of the sidewalls thereof, and a lifting mechanism supported by the main frame for actuating lifting bars to raise and lower strip out of and into the pickling solution contained in the tank, wherein the improvement is in the lifting bars, in which each of the lifting bars comprises: a generally L-shaped main body having one leg extending generally parallel to and below the longitudinal axis of said main frame, and an upright leg lying a in a plane inwardly adjacent a longitudinal end of said main frame; and pickling-solution-resistant cover means snugly surrounding said main body and a removable load-bearing means of pickling-solution-resistant material on said cover means on said one leg removable from said main body.
Claim 8
Dependent Claim
149 words
In an apparatus for lifting sheet metal strip from a pickling tank, including an elongated main frame being of sufficient length to span the tank and rest on the top surface of the sidewalls thereof, and a lifting mechanism supported by the main frame for actuating lifting bars to raise and lower strip out of and into the pickling solution contained in the tank, wherein the improvement is in the lifting bars, in which each of the lifting bars comprises: a generally L-shaped main body having one leg extending generally parallel to and below the longitudinal axis of said main frame, and an upright leg lying a in a plane inwardly adjacent a longitudinal end of said main frame; and pickling-solution-resistant cover means snugly surrounding said main body and a removable load-bearing means of pickling-solution-resistant material on said cover means on said one leg removable from said main body.
Claim 9
Dependent Claim
18 words
The improvement as set forth in claim 6 wherein said load bearing mans is made of nonmetallic material.
Claim 10
Dependent Claim
55 words
The improvement as set forth in claim 7 wherein said cover means includes a cover member extending from the free end of said one leg to inwardly adjacent the free end of said upright leg; and a strip bearing member slidably received on said cover member at the portion thereof extending over said one leg.
Claim 11
Dependent Claim
37 words
The improvement as set forth in claim 7 including seal means formed from a nonmetallic pickling-solution-resistant material and disposed at each end of said cover means for sealing said main body from contact with any pickling solution.
Claim 12
Dependent Claim
31 words
The improvement as set forth in claim 6 including locking means supported by said main body for holding said portion of said cover means fixed with respect to said main body.
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |