US3846892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extractor tool for heat-exchanger core
Assignee: Young Radiator Co
•
Filing: 1973-07-09
•
Granted: 1974-11-12
•
Expires: 1993-07-09
Abstract
Abstract An extractor tool for use in extracting a heat-exchanger core from a casing, wherein the tool has two members threaded together for controlled separation thereof, and two spring fingers are connected to the members and extend away from the members for insertion into tubes in the heat exchanger core. The extending ends of the spring fingers have feet or off-set portions which hook onto the remote ends of the tubes and can then pull on the exhanger core when the screw is turned and the fingers are pulled toward the members. Also, one of the members spans the core and has abutment surfaces which engage the casing surrounding the core for holding the members and permitting the retraction of the fingers and the core to release the core from the casing.
Inventors
- 👤 F Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:50
CPC Classifications
B; B25; B25B; B25B27/00; B25B27/02; B25B27/023; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53113; Y10T29/53652; Y10T29/53796; Y10T29/53848; Y10T29/53857; Y10T29/53861; Y10T29/53987
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
210 words
An extractor tool for use in extracting from a casing a heat exchanger core which has elongated heat-exchange tubes and a header plate at each axial end of said tubes, comprising two rigid members with one of said members having two spaced-apart bearing surfaces offset from the remainder of said one member and disposed at the opposite ends thereof for the purpose of spanning said core and being in contact with said casing only, a screw extending between said members for moving them apart in response to rotation of said screw in one direction, two elongated fingers attached at one end of each thereof to the other of said members and slidably extending through said one member and therebeyond and being of a spring material to be flexible in the extending portions in the directions transverse to the length of each of said fingers, and an offset portion on the extending end of each of said fingers and with said offset portions respectively extending to only one side of each of said fingers and extending in opposite directions relative to each other and being offset in said transverse directions for the purpose of hooking onto a remote end of said heat-exchange tubes when said fingers are inserted into said tubes.
Claim 2
Dependent Claim
210 words
An extractor tool for use in extracting from a casing a heat exchanger core which has elongated heat-exchange tubes and a header plate at each axial end of said tubes, comprising two rigid members with one of said members having two spaced-apart bearing surfaces offset from the remainder of said one member and disposed at the opposite ends thereof for the purpose of spanning said core and being in contact with said casing only, a screw extending between said members for moving them apart in response to rotation of said screw in one direction, two elongated fingers attached at one end of each thereof to the other of said members and slidably extending through said one member and therebeyond and being of a spring material to be flexible in the extending portions in the directions transverse to the length of each of said fingers, and an offset portion on the extending end of each of said fingers and with said offset portions respectively extending to only one side of each of said fingers and extending in opposite directions relative to each other and being offset in said transverse directions for the purpose of hooking onto a remote end of said heat-exchange tubes when said fingers are inserted into said tubes.
Claim 3
Dependent Claim
47 words
The extractor tool as claimed in claim 1, wherein said fingers are uniformly curved along their entire lengths which extend beyond said other member, and each said offset portion is disposed on the respective said fingers to the side thereof toward which the said fingers are curved.
Claim 4
Dependent Claim
25 words
The extractor tool as claimed in claim 2, wherein said fingers are removably secured to said members, for permitting removal and replacement of said fingers.
Claim 5
Dependent Claim
22 words
The extractor tool as claim 1, wherein one end of said screw extends into said one member for connecting said members together.
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) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |