US4723767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary powered linear actuated clamp
Assignee: Delaware Capital Formation Inc
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Filing: 1986-08-08
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Granted: 1988-02-09
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Expires: 2006-08-08
Abstract
Abstract Rotary powered linear actuated clamp having hollow electric motor drive shaft coupled to threaded nut axially retained by reaction roller thrust bearings driving a linear threaded rod having integral toggle linkage actuator guided by anti-friction rollers in linear lateral reaction tracks.
Inventors
- 👤 Alexander W. McPherson
- 👤 Alan Harkrader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:45
CPC Classifications
B; B25; B25B; B25B5/00; B25B5/06; B25B5/12
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
94 words
Rotary/linear clamp linkage actuator comprising base, reversible rotary motor, drive shaft, threaded nut, threaded rod, linkage, lateral reaction and clamp elements characterized by a rotary and linear drive displacement connection between said nut and rod actuated by axially aligned rotary motor drive shaft and axial thrust retention means for one and axial displacement drive means for the other of said nut and rod elements, said other element having a non-rotational axial drive connection with said linkage and linear guide connection with said lateral reaction element, said linkage having an actuating connection with said clamp.
Claim 2
Dependent Claim
94 words
Rotary/linear clamp linkage actuator comprising base, reversible rotary motor, drive shaft, threaded nut, threaded rod, linkage, lateral reaction and clamp elements characterized by a rotary and linear drive displacement connection between said nut and rod actuated by axially aligned rotary motor drive shaft and axial thrust retention means for one and axial displacement drive means for the other of said nut and rod elements, said other element having a non-rotational axial drive connection with said linkage and linear guide connection with said lateral reaction element, said linkage having an actuating connection with said clamp.
Claim 3
Dependent Claim
17 words
Actuator of claim 1 including a rotary drive connection from said drive shaft to said threaded nut.
Claim 4
Dependent Claim
17 words
Actuator of claim 2 including anti-friction thrust bearing means for effecting axial retention of said threaded nut.
Claim 5
Dependent Claim
10 words
Actuator of claim 2 including a molded plastic nut thread.
Claim 6
Dependent Claim
10 words
Actuator of claim 4 wherein said plastic thread comprises moly-disulphide.
Claim 7
Dependent Claim
13 words
Actuator of claim 5 including a plastic thread form having an arcuate root.
Claim 8
Dependent Claim
14 words
Actuator of claim 6 wherein said arcuate root extends tangent to angular side flanks.
Claim 9
Dependent Claim
13 words
Actuator of claim 7 wherein said side flanks terminate at axially extending flats.
Claim 10
Dependent Claim
26 words
Actuator of claim 2 wherein said drive shaft is constructed with an axial bore for receiving said threaded rod upon retractive rotation of said threaded nut.
Claim 11
Dependent Claim
43 words
Actuator of claim 9 including a control rod passage extending from said bore to the end of said drive shaft, and including a control rod extending from the end of said threaded rod through said rod passage to an external switch actuating position.
Claim 12
Dependent Claim
13 words
Actuator of claim 9 including a link actuator extension of said threaded rod.
Claim 13
Dependent Claim
12 words
Actuator of claim 2 wherein said lateral reaction element comprises track means.
Claim 14
Dependent Claim
20 words
Actuator of claim 12 wherein said extension is provided with anti-friction rollers engaging in a pair of opposed track elements.
Claim 15
Dependent Claim
11 words
Actuator of claim 13 including toggle linkage actuated by said extension.
Claim 16
Dependent Claim
52 words
Actuator of claim 13 wherein said base comprises a generally rectangular body said body having means for accommodating mounting on any of four mutually perpendicular adjacent rectangular faces, a bore for seating said thrust bearings, an axial passage for said threaded rod, and means for mounting said pair of said track elements.
Claim 17
Dependent Claim
60 words
Actuator of claim 15 wherein each of said track elements is provided with a linear track recess for engagement by an anti-friction roller terminating in a semi-circular end for stop engagement of said roller at the clamping position of said toggle linkage, and a threaded rod extension with a pair of anti-friction rollers mounted thereon engaging said linear track recesses.
Claim 18
Dependent Claim
28 words
Actuator of claim 2 wherein said motor shaft comprises a stepped diameter shaft having a splined exterior, counter bore interior, through control rod passage, and tanged drive end.
Claim 19
Dependent Claim
30 words
Actuator of claim 16 wherein said threaded rod includes an integral link actuator extension and an apertured end adapted to accommodate a cross pin for mounting anti-friction track engaging rollers.
Claim 20
Dependent Claim
34 words
Actuator of claim 15 wherein said base includes an integral extension between said pair of track elements for spacing connection thereto, and a pair of outer side extensions laterally outside of said track elements.
Claim 21
Dependent Claim
40 words
Actuator of claim 19 including a key stop element for attachment to said side extensions with means for spacing said track elements in both fore and aft and lateral directions to include clearance space for clamp arm pivotal mounting therebetween.
Claim 22
Dependent Claim
20 words
Actuator of claim 1 wherein said lateral reaction element comprises anti-friction means secured to said base engaging said other element.
Claim 23
Dependent Claim
16 words
Actuator of claim 21 wherein said anti-friction means comprises a roller bearing engaging said other element.
Claim 24
Dependent Claim
20 words
Actuator of claim 1 including adjustable means for limiting the travel of said other element for adjustment of clamping position.
Claim 25
Dependent Claim
20 words
Actuator of claim 12 including adjustable means for limiting the travel of said anti-friction rollers for adjustment of clamping 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) | 1991-02-08 | 1991-08-10 | 1992-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-08 | 1995-08-10 | 1996-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-08 | 1999-08-10 | 2000-02-09 | $7700.00 | Window Closed / Lapsed |