Patent US3579795A successfully refreshed from Google Patents.
US3579795A
Expired / Lapsed
US
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Component removing tool
Assignee: Unisys Corp
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Filing: 1969-08-08
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Granted: 1971-05-25
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Expires: 1989-08-08
Abstract
Abstract A power augmented handtool particularly useful for removing integrated circuit components from a printed circuit board is described. The tool has a body in which a plunger is movable between an extended and a retracted position. A pair of opposed, component gripping, jaws are pivotally connected to the plunger at the nose end of the tool. When the plunger is in the retracted position, the jaws are positively cammed open. While the plunger travels toward the extended position, the jaws are resiliently biased open. When the plunger is in the extended position, the jaws are positively cammed to a closed position to grip a circuit board component. A relatively strong spring biases the plunger toward the retracted position so that when the solder holding a component to a printed circuit board is melted, the jaws draw the component away from the board. The component is released when the jaws are cammed open when the plunger reaches the retracted position. Either compressed air pressure or a mechanical arrangement may be employed for extending the plunger and jaws.
Inventors
- 👤 Per Aron Burman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:01
CPC Classifications
H; H05; H05K; H05K13/00; H05K13/04; H05K13/0486; H05K13/0491; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53796; Y10T29/5383; Y10T29/53909; Y10T29/53943
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
49 words
An electronic component removal tool comprising: means for positively gripping a component detachably connected to a circuit element; means for resiliently urging the gripped component away from the circuit element; and means for positively releasing the means for gripping when the gripped component is detached from the circuit element.
Claim 2
Dependent Claim
49 words
An electronic component removal tool comprising: means for positively gripping a component detachably connected to a circuit element; means for resiliently urging the gripped component away from the circuit element; and means for positively releasing the means for gripping when the gripped component is detached from the circuit element.
Claim 3
Dependent Claim
69 words
A tool comprising: a tool body; a pair of opposed jaws; means for pivotally mounting both jaws for motion between open and closed positions; means for moving both jaws toward an extended position relative to the body; means for positively moving the jaws toward the closed position as the jaws approach the extended position; and means for resiliently biasing both jaws toward a retracted position relative to the body.
Claim 4
Dependent Claim
69 words
A tool comprising: a tool body; a pair of opposed jaws; means for pivotally mounting both jaws for motion between open and closed positions; means for moving both jaws toward an extended position relative to the body; means for positively moving the jaws toward the closed position as the jaws approach the extended position; and means for resiliently biasing both jaws toward a retracted position relative to the body.
Claim 5
Dependent Claim
26 words
A tool as defined in claim 2 further comprising means for positively moving the jaws toward the open position as the jaws approach the retracted position.
Claim 6
Dependent Claim
30 words
A tool as defined in claim 3 further comprising means for resiliently biasing the jaws toward the open position during travel thereof between the retracted position and the extended position.
Claim 7
Dependent Claim
23 words
A tool as defined in claim 3 wherein the means for moving the jaws toward the extended position comprises a pneumatically actuated plunger.
Claim 8
Dependent Claim
123 words
A tool comprising: a tool body; a plunger mounted for longitudinal motion in the body between an extended position and a retracted position; means for applying pressure to the plunger for moving the plunger toward the extended position; a pair of opposed work engaging jaws; means for pivotally mounting each of the jaws on the plunger for motion between a mutually open position and a mutually closed position; means on the tool body for positively moving the jaws toward the open position when the plunger is in the retracted position; means on the tool body for positively moving the jaws toward the closed position when the plunger is in the extended position; and means for resiliently biasing the plunger toward the retracted position.
Claim 9
Dependent Claim
123 words
A tool comprising: a tool body; a plunger mounted for longitudinal motion in the body between an extended position and a retracted position; means for applying pressure to the plunger for moving the plunger toward the extended position; a pair of opposed work engaging jaws; means for pivotally mounting each of the jaws on the plunger for motion between a mutually open position and a mutually closed position; means on the tool body for positively moving the jaws toward the open position when the plunger is in the retracted position; means on the tool body for positively moving the jaws toward the closed position when the plunger is in the extended position; and means for resiliently biasing the plunger toward the retracted position.
Claim 10
Dependent Claim
37 words
A tool as defined in claim 6 wherein the means for applying pressure comprises: means for applying fluid pressure to an end of the plunger; and valve means for controllably applying and releasing the means for applying.
Claim 11
Dependent Claim
113 words
A tool as defined in claim 6 wherein: each of the jaws has a substantially L-shape, the work engaging portion of each jaw being at the end of the upright leg of the L; the means for pivotally mounting each jaw comprises a pair of spaced apart pins each pivotally supporting a jaw substantially at the intersection of the leg and foot of the L; the means for moving the jaws toward an open position comprises a camming surface on the bottom oF the foot of the L; and the means for moving the jaws toward a closed position comprises a camming surface on the upper portion on the foot of the L.
Claim 12
Dependent Claim
30 words
A tool as defined in claim 6 further comprising means for resiliently urging the jaws toward the open position during motion of the plunger between the retracted and extended positions.
Claim 13
Dependent Claim
34 words
A tool as defined in claim 6 further comprising a pair of depending legs straddling the jaws and terminating in approximately the same plane as the ends of the jaws in the extended position.
Claim 14
Dependent Claim
159 words
A component removing tool comprising: a tool body; a plunger mounted for motion in the body between a retracted position and an extended position; means for selectively applying a force to the plunger for moving the plunger toward the extended position; spring means for resiliently urging the plunger toward the retracted position upon release of the force; a transverse yoke mounted on the plunger at the forward end of the tool; a pair of pivots, one at each end of the yoke; a pair of L-shaped jaws, one mounted on each of the pivots, each of the jaws having a work engaging portion on the upper end of the upstanding leg of the L; a pair of legs extending from the body and straddling the jaws; and a transverse member between the legs for engaging the upper portion of the foot of each of the L-shaped jaws for moving the jaws toward the closed position in the extended position.
Claim 15
Dependent Claim
159 words
A component removing tool comprising: a tool body; a plunger mounted for motion in the body between a retracted position and an extended position; means for selectively applying a force to the plunger for moving the plunger toward the extended position; spring means for resiliently urging the plunger toward the retracted position upon release of the force; a transverse yoke mounted on the plunger at the forward end of the tool; a pair of pivots, one at each end of the yoke; a pair of L-shaped jaws, one mounted on each of the pivots, each of the jaws having a work engaging portion on the upper end of the upstanding leg of the L; a pair of legs extending from the body and straddling the jaws; and a transverse member between the legs for engaging the upper portion of the foot of each of the L-shaped jaws for moving the jaws toward the closed position in the extended position.
Claim 16
Dependent Claim
51 words
A tool as defined in claim 11 further comprising: a washer between the yoke and the body; spring means for urging the washer toward the yoke; and a camming surface on each of said jaws for engaging the washer for urging the jaws toward the open position at the retracted position.
Claim 17
Dependent Claim
69 words
A tool as defined in claim 12 further comprising: a sensing member extendable from one of the depending legs for contact with a workpiece; and valve means connected to the sensing member for selectively (a) permitting fluid pressure action on the plunger when the sensing member engages a workpiece and (b) preventing fluid pressure action on the plunger when the sensing member is out of engagement with a workpiece.
Claim 18
Dependent Claim
59 words
A component removing tool as defined in claim 12 wherein the means for applying a force comprises: a valve in the tool body; means for applying fluid pressure to the valve; a passage from the valve to a portion of the plunger for applying fluid pressure thereto; and hand movable means on the valve body for actuating the valve.
Claim 19
Dependent Claim
113 words
A component removing tool as defined in claim 12 wherein the means for applying force comprises: a first fluid passage interconnecting the exterior of the tool body and the end of the plunger; a second fluid passage interconnecting the exterior of the tool body and the end of the plunger; a valve member movable between a first position closing the first passage and opening the second passage, and a second position opening the first passage and closing the second passage; a spring for biasing the valve member toward the first position; a lever for moving the valve member toward the second position; and pivot means for mounting the lever on the tool body.
Claim 20
Dependent Claim
118 words
A component removing tool as defined in claim 15 further comprising: a fluid bleed passage interconnecting the exterior of the tool and the first passage between the valve member and the plunger; a rod mounted in the tool body for longitudinal motion between an extended position and a retracted position, a first end of the rod extending beyond one of the legs in the extended position, and being substantially flush with the end of the leg in the retracted position, the other end of the rod being clear of the fluid bleed passage in the extended position and blocking the fluid bleed passage in the retracted position; and a spring for biasing the rod toward the extended position.
Claim 21
Dependent Claim
40 words
A component removing tool as defined in claim 12 wHerein the hand actuated means for applying a force comprises: a lever in engagement with an end of the plunger; and pivot means for mounting the lever on the tool 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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |