US3842478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for removing components connected to a circuit board
Assignee: Wincor Nixdorf International GmbH
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Filing: 1973-09-17
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Granted: 1974-10-22
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Expires: 1993-09-17
Abstract
Abstract A device or tool for removing a component of small dimensions from a carrier plate or circuit board which component is connected to the carrier plate by connecting elements which project through openings in the carrier plate and are attached to conductors thereon by solder joints characterized by a tong-like tool having a heating head mounted on one leg of the tool and a gripping head, which has spaced pairs of gripping elements being rotatably mounted on the other leg to present a selected pair of gripping elements in an operable arrangement with the heating head. A spring biased member is associated with each pair of gripping elements. The spring biased member engages the carrier plate and urges the housing and component engaged by the gripping elements away from the carrier plate to withdraw the connecting elements from the opening as the solder joints are melted or liquefied by the heating head. Preferably, the spring biased members of each of the separate pairs of gripping elements are aligned so that a single compression spring urges both of the members to the outermost position. The housing is also preferably provided with a detent to hold the housing in selected operable positions on its rotatable mounting.
Inventors
- 👤 K Schreckeneder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:12
CPC Classifications
H; H05; H05K; H05K13/00; H05K13/04; H05K13/0486; H05K13/0491; B; B23; B23K; B23K1/00; B23K1/018; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53274; Y10T29/53283
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
281 words
In a device for removing a component of small dimensions from a carrier plate, the component being connected to the carrier plate by connecting elements which project through openings in the carrier plate and are attached to conductors thereon by solder joints, said device comprising a tong-like tool having a pair of legs interconnected at a pivot point, means for gripping a component disposed on an end of one of said pair of legs and a heating head being disposed on an end of the other of the pair of legs and having bores in a face for receiving the solder joints applying heat to the solder joints of the component, the improvement comprising the means for gripping including a housing, at least one pair of gripping elements mounted on opposite surfaces of the housing adjacent one end surface thereof with a free end of each element extending passed the end surface for engaging the component to be removed from the carrier plate, at least one member mounted on said housing with the end of each member being movable between a first position extending passed the free ends of the gripping elements to a second position adjacent the free ends, and means biasing said member to said first position so that when the pair of gripping elements engages a component and the solder joints connecting the connecting elements of the component to the carrier plate are liquefied by the heating head and said member engages the surface of the carrier plate, said biasing means acting on said member urges the housing away from the carrier plate to withdraw the connecting elements of the components from the openings in the carrier plate.
Claim 2
Dependent Claim
281 words
In a device for removing a component of small dimensions from a carrier plate, the component being connected to the carrier plate by connecting elements which project through openings in the carrier plate and are attached to conductors thereon by solder joints, said device comprising a tong-like tool having a pair of legs interconnected at a pivot point, means for gripping a component disposed on an end of one of said pair of legs and a heating head being disposed on an end of the other of the pair of legs and having bores in a face for receiving the solder joints applying heat to the solder joints of the component, the improvement comprising the means for gripping including a housing, at least one pair of gripping elements mounted on opposite surfaces of the housing adjacent one end surface thereof with a free end of each element extending passed the end surface for engaging the component to be removed from the carrier plate, at least one member mounted on said housing with the end of each member being movable between a first position extending passed the free ends of the gripping elements to a second position adjacent the free ends, and means biasing said member to said first position so that when the pair of gripping elements engages a component and the solder joints connecting the connecting elements of the component to the carrier plate are liquefied by the heating head and said member engages the surface of the carrier plate, said biasing means acting on said member urges the housing away from the carrier plate to withdraw the connecting elements of the components from the openings in the carrier plate.
Claim 3
Dependent Claim
37 words
In a device according to claim 1, wherein each of the gripping elements is a leaf spring having a flange at said free end to provide a pair of inwardly directed hook portions for engaging the component.
Claim 4
Dependent Claim
59 words
In a device according to claim 1, wherein said housing is a parallelepiped and wherein said gripping means includes a pair of said members, each of said members being mounted on opposite sides of the housing between the gripping elements, each member being mounted on the housing by a pin received in an elongated slot provided in the member.
Claim 5
Dependent Claim
49 words
In a device according to claim 1, wherein said heating head includes means for applying a suction to the bores for removing molten solder, and said device includes means coupling the member to the suction means for actuating the suction means as the member moves to the first position.
Claim 6
Dependent Claim
139 words
In a device according to claim 1, wherein said housiNg is rotatably mounted on a shaft connected to the one leg of the device, said housing including at least a second pair of gripping elements mounted at an end opposite said one pair of gripping elements with the distance between the second pair of gripping elements being different than the distance between said one pair, at least one member associated with said second pair and being mounted for movement at the opposite end of the housing between a first position extending passed the free ends of the second pair of gripping elements to a position adjacent the free ends, and means biasing said member to said first position so that rotation of the housing enables positioning different pairs of gripping elements for use in removing components of different dimensions.
Claim 7
Dependent Claim
22 words
In a device according to claim 5, wherein the housing includes means for holding it in selected rotational positions on the shaft.
Claim 8
Dependent Claim
63 words
In a device according to claim 6, wherein the member associated with said one pair of gripping elements and the member associated with said second pair are aligned and wherein the means for biasing comprises a compression spring received in a passageway in the housing extending there between, said passageway being provided by a spring plate mounted on a side of the housing.
Claim 9
Dependent Claim
43 words
In a device according to claim 7, wherein the means for holding comprises at least one groove provided on said shaft, a spherical body carried in said housing for cooperating with said groove, and means for biasing the spherical body into said groove.
Claim 10
Dependent Claim
25 words
In a device according to claim 8, wherein the means for biasing the spherical body comprises a spring lug formed on the spring retainer plate.
Claim 11
Dependent Claim
51 words
In a device according to claim 9, wherein said heating head includes means for applying a suction to the bores 1 for removing molten solder, and said device includes means coupling the members to the suction means for actuating the suction means as the member is moved to the first position.
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) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |