US3910125A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stored energy ejector mechanism
Assignee: Donley Miller and Nowikas Inc
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Filing: 1974-07-03
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Granted: 1975-10-07
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Expires: 1994-07-03
Abstract
Abstract A stored energy ejector mechanism is disclosed and described and includes an ejector plunger member which is propelled by a spring-bias induced by an actuator lever actuated by a stroke of a punch press and the like. The stored energy in these springs is released and the propelling or ejection motion of a plunger member is begun by the actuation of a trigger mechanism whose release time is selectively established and preferably occurs during the same stroke of the press mechanism in which is produced the loading of the springs. Although primarily for use with a punch press to provide a substantially quiet ejector action, this stored energy is equally applicable to other operations such as providing an ejector mechanism for use with a conveying or line inspection system employing linear motion.
Inventors
- 👤 Walter M Nowikas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:07
CPC Classifications
G; G05; G05G; G05G17/00; Y; Y10; Y10T; Y10T74/00; Y10T74/11; Y10T83/00; Y10T83/202; Y10T83/2027; Y10T83/2029; Y10T83/2092; Y10T83/22; Y10T83/2205
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
229 words
A stored energy ejector mechanism adapted for mounting on a punch press, a conveyor support and like apparatus wherein workpieces are to be selectively removed at selected times in the operation thereof, said ejector mechanism including: (a) a housing; (b) an ejector plunger reciprocably carried in guideways provided in said housing; (c) biasing means associated with the ejector plunger and adapted to move the plunger in one direction; (d) means for limiting the extent of movement of the plunger in said one direction; (e) at least one actuator lever movable so as to engage the plunger and move the plunger counterflow to the bias urged direction and to a ''''loaded'''' biased position; (f) an energizer shaft operatively connected to the actuator lever, said energizer shaft operatively moved by the apparatus on which the ejector mechanism is mounted; (g) trigger means in association with the ejector plunger and adapted to engage and retain said ejector plunger in a ''''cocked'''' condition as and after the actuator lever has moved the plunger to its biased loaded condition, and (h) trigger release means associated with and moved by the apparatus to and on which the ejector mechanism is mounted, said trigger release means when actuated removing the retaining engagement of the trigger and permitting the released plunger under the influence of the bias means to move rapidly to its limited extent of movement.
Claim 2
Dependent Claim
229 words
A stored energy ejector mechanism adapted for mounting on a punch press, a conveyor support and like apparatus wherein workpieces are to be selectively removed at selected times in the operation thereof, said ejector mechanism including: (a) a housing; (b) an ejector plunger reciprocably carried in guideways provided in said housing; (c) biasing means associated with the ejector plunger and adapted to move the plunger in one direction; (d) means for limiting the extent of movement of the plunger in said one direction; (e) at least one actuator lever movable so as to engage the plunger and move the plunger counterflow to the bias urged direction and to a ''''loaded'''' biased position; (f) an energizer shaft operatively connected to the actuator lever, said energizer shaft operatively moved by the apparatus on which the ejector mechanism is mounted; (g) trigger means in association with the ejector plunger and adapted to engage and retain said ejector plunger in a ''''cocked'''' condition as and after the actuator lever has moved the plunger to its biased loaded condition, and (h) trigger release means associated with and moved by the apparatus to and on which the ejector mechanism is mounted, said trigger release means when actuated removing the retaining engagement of the trigger and permitting the released plunger under the influence of the bias means to move rapidly to its limited extent of movement.
Claim 3
Dependent Claim
83 words
A stored energy ejector mechanism as in claim 1 in which the biasing means associated with the ejector plunger includes a plunger spring anchor carried by and secured to the ejector plunger and at least one tension spring which is attached at one end to the plunger spring anchor and with the other end of the tension spring secured to the housing and sufficiently extended to supply an initial tension which is increased as the ejector plunger is moved to its cocked condition.
Claim 4
Dependent Claim
60 words
A stored energy ejector mechanism as in claim 2 in which the spring anchor is disposed to carry a pair of like tension springs which are arranged so that the springs are disposed on opposite sides of the ejector plunger, each spring of the pair of springs providing approximately one-half of the bias used for propulsion of the ejector plunger.
Claim 5
Dependent Claim
70 words
A stored energy ejector mechanism as in claim 1 in which the moving of the ejector plunger from its ''''at rest'''' condition to its cocked condition is by a coupled pair of actuator levers pivotally carried by a pin mounted in the housing, the movement of the actuator levers being in response to one portion of a reciprocal stroke of an energizer shaft moved by the associated workpiece production apparatus.
Claim 6
Dependent Claim
40 words
A stored energy mechanism as in claim 4 in which the actuator levers are formed with like slot guideways in which a clevis pin is slidable, this clevis pin being reciprocably moved by a fork carried by the energizer shaft.
Claim 7
Dependent Claim
53 words
A stored energy ejector mechanism as in claim 5 in which there is provided a biasing means associated with the actuator levers, said biasing means disposed to urge the levers to their at rest position during the time the levers are not being moved to bring the ejector plunger to its cocked condition.
Claim 8
Dependent Claim
179 words
A stored energy ejector mechanism as in claim 1 in which the trigger mechanism includes a sear pivotally mounted on a shaft carried by the housing, said sear having a depending portion with a face adapted to engage a shoulder edge carried by the ejector plunger, the sear urged toward and into engagement with the ejector plunger by a bias means and when the shoulder edge in the ejector plunger is engaged providing a stop of the biased plunger in its cocked condition, and a sear lifter carried by a reciprocably moved sear lifter shaft, the sear lifter adapted to pass by an engaging shoulder portion of the sear during one stroke of The lifter shaft and during a portion of the other stroke of said shaft the sear lifter is brought into engagement with the engaging shoulder portion of the sear to cause the sear to rotate on its support shaft sufficiently to disengage the depending face of the sear from in way of the shoulder edge of the plunger to release the plunger from its cocked condition.
Claim 9
Dependent Claim
100 words
A stored energy ejector mechanism as in claim 7 in which the shoulder edge of the ejector plunger is an undercut in the ejector plunger and in which the sear lifter is pivotally carried on a clevis pin mounted in the depending end of the lifter shaft, the sear lifter having stop means for limiting a rotary motion of the sear lifter around the pin in one direction while being formed so as to rotate at least sixty degrees around the pin in the other direction during the passing of the sear lifter by the engaging shoulder of the sear.
Claim 10
Dependent Claim
42 words
A stored energy ejector mechanism as in claim 8 in which the stroke, during which the sear lifter is moved past the sear, is positively limited in its travel by a stop pin in way of the path of the sear lifter.
Claim 11
Dependent Claim
48 words
A stored energy ejector mechanism as in claim 9 in which both the energizer shaft and sear lifter shaft are carried by an actuator mechanism bracket adapted for attachment to a movable portion of the associated apparatus from which the ejector mechanism is disposed to move produced workpieces.
Claim 12
Dependent Claim
63 words
A stored energy ejector mechanism as in claim 10 in which lost motion is provided with both the energizer shaft and sear lifter shaft and the actuator mechanism bracket, the lost motion, in part, including a compression spring which is compressed to a determined extent to insure that the lost motion positively occurs during the desired time period of movement of the bracket.
Claim 13
Dependent Claim
80 words
A stored energy ejector mechanism as in claim 1 in which the means for limiting the extent of movement of the ejector plunger includes an adjustable collar which is selectively locked in a determined position on the ejector plunger and an impact absorber which is positioned and retained by the housing to provide the determined stop of the ejector stroke when the collar carried by the ejector plunger is moved from the cocked condition to the forward at rest position.
Claim 14
Dependent Claim
39 words
A stored energy ejector mechanism as in claim 12 in which the ejector mechanism when associated with a punch press has both the cocking action and the trigger release action occurring during the same stroke cycle of the press.
Claim 15
Dependent Claim
59 words
A stored energy ejector mechanism as in claim 13 in which the press stroke cycle is the upward stroke and in which the trigger means includes a sear lifter shaft, and in which the energizer shaft and sear lifter shaft are both slidably carried in a bracket secured to a member moved by the ram of the punch press.
Claim 16
Dependent Claim
58 words
A stored energy ejector mechanism as in claim 14 in which both the triggering action of the sear lifter shaft and the loading action of the energizer shaft are both adjustable as to their actuation with respect to a position in the cycle which occurs after the bottom dead center of the punch press stroke has been achieved.
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) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |