US3908499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Knife retainer
Assignee: Individual
•
Filing: 1973-08-01
•
Granted: 1975-09-30
•
Expires: 1993-08-01
Abstract
Abstract A knife retainer device for conveniently rigidly securing a generally circular, thin cutting knife blade to an elongated arbor while facilitating ready access to and removal of the knife for knife maintenance and changing purposes. The retainer includes a body portion adapted to be closely received over and affixed to an elongated arbor and the body portion itself has a radially outwardly extending flange defining a first blade engaging surface with the end of the body portion adjacent the engaging surface being threaded. The flange includes a plurality of peg-like members extending outwardly from the first engaging surface axially of the body portion toward the threaded end. The circular knife blade comprises a segmented, two piece blade having a plurality of mounting holes transversely therethrough which are adapted to closely receive the peg-like members when the segments are properly positioned on the retainer. Magnetic elements disposed in the first engaging surface magnetically attract the knife segments for temporarily holding them in position against the first engaging surface in order that the final blade locking steps may be easily completed. To finalize blade locking, a locking member having a second blade engaging surface thereon is threadedly advanced along the threaded area of the body portion from a first position adjacent the outermost end of the threads to a second knife engaging position with a portion of the side faces of the blade being tightly engaged between the two blade engaging surfaces.
Inventors
- 👤 William Dale Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:10
CPC Classifications
B; B23; B23D; B23D35/00; B23D35/002; B23D35/004; Y; Y10; Y10T; Y10T83/00; Y10T83/768; Y10T83/7747; Y10T83/929; Y10T83/9372; Y10T83/9377; Y10T83/9457; Y10T83/9464; Y10T83/9469
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
201 words
A knife blade retainer device for conveniently mounting a rotary cutting knife blade having a cutting surface disposed adjacent the outermost edge thereof on an elongated arbor, said retainer comprising: an elongated body portion adapted to be generally axially received over a portion of said arbor, said body portion including a first knife engaging surface and means for selectively affixing said body portion to said arbor; means on said body portion for releasably receiving a knife locking member; knife blade locating means adapted to engage said knife and prevent relative rotation between said knife and said retainer; and a knife blade locking member including a second knife blade engaging surface thereon, said locking member being selectively receivable on said receiving means and movable thereon between a first non-locking position with said second engaging surface axially spaced from said first engaging surface and a second knife locking position with said first and second engaging surfaces closely spaced from each other with said knife blade clamped therebetween, the knife blade locking member further including means in said knife blade locking member for providing room for said knife blade locating means to allow said second knife blade engaging surface to engage said knife blade.
Claim 2
Dependent Claim
201 words
A knife blade retainer device for conveniently mounting a rotary cutting knife blade having a cutting surface disposed adjacent the outermost edge thereof on an elongated arbor, said retainer comprising: an elongated body portion adapted to be generally axially received over a portion of said arbor, said body portion including a first knife engaging surface and means for selectively affixing said body portion to said arbor; means on said body portion for releasably receiving a knife locking member; knife blade locating means adapted to engage said knife and prevent relative rotation between said knife and said retainer; and a knife blade locking member including a second knife blade engaging surface thereon, said locking member being selectively receivable on said receiving means and movable thereon between a first non-locking position with said second engaging surface axially spaced from said first engaging surface and a second knife locking position with said first and second engaging surfaces closely spaced from each other with said knife blade clamped therebetween, the knife blade locking member further including means in said knife blade locking member for providing room for said knife blade locating means to allow said second knife blade engaging surface to engage said knife blade.
Claim 3
Dependent Claim
50 words
The retainer as defined in claim 1 further including magnetic elements received in one of said first and second engaging surfaces adapted to magnEtically attract said knife blade to retain said blade in position relative to said one engaging surface when said knife locking member is in said first position.
Claim 4
Dependent Claim
92 words
The retainer as defined in claim 1 wherein said knife blade has a central opening dimensioned to be received over said body portion and is segmented into at least two substantially identical pieces, each said piece including mounting holes spaced therearound adjacent said central opening for receiving said knife locating means, said knife locating means comprising a plurality of peg-like members extending outwardly from said one engaging surface generally axial of said body portion adapted to be received in said mounting holes when said segments are properly positioned relative to said retainer.
Claim 5
Dependent Claim
55 words
The retainer as defined in claim 3 wherein said releasable receiving means comprises a threaded area adjacent said first engaging surface and extending axially along a portion of said body portion from one end thereof, said knife locking member being threadedly received on said threaded portion and threadedly movable between said first and second positions.
Claim 6
Dependent Claim
48 words
The retainer as defined in claim 4 wherein the means for providing room for said knife blade includes a groove extending circularly therearound, said groove receiving the outwardly extending ends of said peg-like members as said locking member is threadedly moved from said first toward said second position.
Claim 7
Dependent Claim
18 words
The retainer as defined in claim 5 wherein said peg-like members are disposed in said first engaging surface.
Claim 8
Dependent Claim
27 words
The retainer as defined in claim 4 wherein said threaded portion includes means disposed adjacent said one end for retaining said locking member on said threaded portion.
Claim 9
Dependent Claim
30 words
The retainer as defined in claim 7 wherein said affixing means comprises a threaded mechanical fastener extending generally transversely through said body portion for selective clamping engagement with said arbor.
Claim 10
Dependent Claim
41 words
The retainer as defined in claim 8 further including spaced apart wrench receiving recesses in the outer peripheral surfaces of said locking member and said body portion adapted for use in moving said locking member between said first and second positions.
Claim 11
Dependent Claim
29 words
The retainer as defined in claim 1 wherein said body portion comprises two substantially identical axial body portion halves and further includes means for selectively rigidly interconnecting said halves.
Claim 12
Dependent Claim
27 words
The retainer as defined in claim 1 wherein said locking member comprises two interfitting locking member halves and further includes means for selectively rigidly interconnecting said halves.
Claim 13
Dependent Claim
268 words
A knife blade retainer device for mounting a cutting knife blade on an elongated arbor, said retainer device comprising in combination: an elongated body portion having first and second ends and an intermediate area, a bore extending axially through said body portion between said first and second ends adapted to permit said body portion to be closely received over said arbor, a first knife blade engaging surface adjacent said second end disposed generally transverse of said body portion, said second end including means for receiving a locking member thereon; means for rigidly affixing said body portion to said arbor to prevent relative rotation therebetween; a knife locking member having a second knife engaging surface thereon, said locking member being received on said receiving means and movable thereon between a first non-locking position with said first and second engaging surfaces spaced apart from each other and a second knife locking position with said engaging surfaces in a closely spaced knife engaging relationship; knife locating means disposed about one of said first and second engaging surfaces extending outwardly thereof toward the other of said engaging surfaces; means on the other of said engaging means for providing room for said knife locating means; and a rotary knife blade having opposed side faces and a cutting edge adjacent the oUter peripheral surface thereof, said blade including a central opening for permitting said blade to be received over said body portion and means for blade mounting association with said locating means, whereby when said engaging surfaces are in said second position they engage portions of said opposed side faces adjacent said central opening.
Claim 14
Dependent Claim
268 words
A knife blade retainer device for mounting a cutting knife blade on an elongated arbor, said retainer device comprising in combination: an elongated body portion having first and second ends and an intermediate area, a bore extending axially through said body portion between said first and second ends adapted to permit said body portion to be closely received over said arbor, a first knife blade engaging surface adjacent said second end disposed generally transverse of said body portion, said second end including means for receiving a locking member thereon; means for rigidly affixing said body portion to said arbor to prevent relative rotation therebetween; a knife locking member having a second knife engaging surface thereon, said locking member being received on said receiving means and movable thereon between a first non-locking position with said first and second engaging surfaces spaced apart from each other and a second knife locking position with said engaging surfaces in a closely spaced knife engaging relationship; knife locating means disposed about one of said first and second engaging surfaces extending outwardly thereof toward the other of said engaging surfaces; means on the other of said engaging means for providing room for said knife locating means; and a rotary knife blade having opposed side faces and a cutting edge adjacent the oUter peripheral surface thereof, said blade including a central opening for permitting said blade to be received over said body portion and means for blade mounting association with said locating means, whereby when said engaging surfaces are in said second position they engage portions of said opposed side faces adjacent said central opening.
Claim 15
Dependent Claim
47 words
The retainer as defined in claim 12 wherein said receiving means comprise a threaded area extending inwardly along said body portion from said second end toward said first engaging surface and including means disposed adjacent said second end for retaining said locking member on said threaded portion.
Claim 16
Dependent Claim
43 words
The retainer as defined in claim 13 wherein said one of said engaging surfaces includes magnetic members disposed therein for attracting said knife blade and retaining it is position against said first engaging surface when said locking member is in said first position.
Claim 17
Dependent Claim
97 words
The retainer as defined in claim 13 wherein said one of said engaging surfaces comprises said first engaging surface, said locating means comprising a plurality of peg-like members spaced around said first engaging surface and extending outwardly thereof toward said second engaging surface generally axial of said body portion, said blade mounting means comprising a plurality of spaced holes extending transversely through said blade between said opposed side faces with said plurality of holes being spaced and dimensioned to receive said peg-like members and properly locate said blade relative to said retainer adjacent said first engaging surface.
Claim 18
Dependent Claim
41 words
The retainer as defined in claim 15 wherein said second engaging surface includes a circular groove disposed therein for receiving the outwardly extending ends of said peg-like members as said locking member is moved from said first toward said second position.
Claim 19
Dependent Claim
37 words
The retainer as defined in claim 16 wherein said knife blade is comprised of a plurality of knife blade segments, said segments each being individually locatable relative to said body portion to cooperate in forming said blade.
Claim 20
Dependent Claim
29 words
The retainer as defined in claim 12 wherein said body portion comprises two substantially identical axial body portion halves and further includes means for selectively rigidly interconnecting said halves.
Claim 21
Dependent Claim
27 words
A retainer as defined in claim 12 wherein said locking member comprises two interfitting locking member halves and further includes means for selectively rigidly interconnecting said halves.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |