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US3618994A Expired / Lapsed US ⏱️ 0.0 years remaining

Arbor nut

Assignee: WITHROW ENTERPRISES INC AN OH CORP
•
Filing: 1969-05-14
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Granted: 1971-11-09
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Expires: 1989-05-14
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Abstract

Abstract Disclosed are several embodiments of an invention relating to an arbor nut for detachably interconnecting and tightening machine elements. One embodiment of the nut includes a body provided with a threaded main bore, a first and second side face and an exterior transverse peripheral face lying therebetween. A plurality of threaded bores are defined in the body extending from the first side face to the second side face. Jacking screws are disposed within each of said bores. The jacking screws are defined by socket heads adapted to be turned and advanced by means of an Allen wrench and swivel pads at the ends of the screws opposite the socket heads. Each of the swivel pads comprises a bearing element having a face and includes a spherical bearing seat adapted to engage a complementary bearing surface of the jacking screw. In operation, the nut is advanced hand tight against an adjacent machine element. An Allen wrench is then utilized to advance the jacking screws against the face of the adjacent machine element in order to lock the elements firmly on the arbor. Any misalignment of the adjacent element and the body of the nut is compensated for by the swivel pad at the end of the jacking screw. The swivel pad also isolates the rotary movement of the jacking screw from the adjacent machine element. A second embodiment of the invention includes the nut as heretofore described which further includes an additional bore in the body of the nut extending from its first side face to its second side face. A locking member, disposed in the additional bore has a threaded portion engaged with the threaded portion of the additional bore and includes an end portion which is capable of extending beyond the first side face of the nut to engage a recess in the machine element adjacent to the nut. A pilot hole may also be provided in the nut for locating one or more recesses in the adjacent machine element. If desired, the recesses in the adjacent machine element may take the form of a cylindrical bore complementary in shape to the locking member. A third embodiment of the nut according to the invention includes a pair of opposed faces forming a gap in the body of the nut, each opposed face being defined by a surface having the perimeter comprising the threaded main bore of the nut, its first and second side faces, and its exterior peripheral surface. In a preferred embodiment, an adjustment means includes a threaded bore and counterbore extending from the exterior surface of the body of the nut beyond the pair of opposed faces in a direction generally transverse to the faces. A securing member is located in said threaded bore in such a manner that the rotation of the securing member causes a change in the length of the gap.

Inventors

  • 👤 Paul J Gepfert
  • 👤 Thomas E Cyphert

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 12:42
CPC Classifications
F; F16; F16D; F16D1/00; F16D1/06; F16B; F16B39/00; F16B39/02; F16D1/08; F16D1/0852; F16D1/0864; F16B2200/00; F16B2200/69; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32114; Y10T403/32131; Y10T403/32155; Y10T403/32254; Y10T403/32262; Y10T403/32418; Y10T403/32532

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 396 words
In a machine, the combination which comprises a. an arbor having a threaded shank portion, b. a rotatable tool disposed about said arbor, c. a generally annular spacer including first and second side faces generally perpendicular to the axis of said spacer, at least a portion of said first side face being in surface engagement with at least a portion of said tool, d. a nut for detachably interconnecting and tightening said arbor, tool and spacer, said nut including: 1. a body provided with a threaded main bore and including a first and second side face and an exterior surface therebetween, said exterior surface being adapted to receive a torquing force for initially tightening the combination of said arbor, tool, and spacer, 2. a plurality of threaded first bores in said body extending from said first side face to said second side face, 3. a plurality of jacking screws arranged so that a jacking screw is disposed within each of said first bores, each of said jacking screws being defined by: a. a head portion adapted to be engaged by suitable torquing means, the head portion of one of said jacking screws being engageable independently of the engagement of another of said jacking screws, b. an end surface portion of said jacking screw adapted to contact said second side face of said spacer, whereby when said jacking screw is rotated, said end surface portion is advanced into engagement with said spacer thereby to induce high axial pressure between said nut and said threaded shank portion to maintain a tightened combination, e. at least one second bore, including a threaded portion, in said body extending from said first side face to said second side face, f. a recess in said second side face of said spacer, said recess being defined by a smooth surface having a generally circular cross section to permit axial movement of a member disposed therein when a jacking screw is advanced, and g. a locking member having a threaded portion engaged with the threaded portion of said second bore and having an end portion generally complementary to said recess at least a portion of said end portion thereof being located in said recess in said second side face of said spacer in such a manner to permit axial movement therein, whereby said combination is additionally secured against unwanted rotation relative to said arbor.
Claim 2
Dependent Claim 396 words
In a machine, the combination which comprises a. an arbor having a threaded shank portion, b. a rotatable tool disposed about said arbor, c. a generally annular spacer including first and second side faces generally perpendicular to the axis of said spacer, at least a portion of said first side face being in surface engagement with at least a portion of said tool, d. a nut for detachably interconnecting and tightening said arbor, tool and spacer, said nut including: 1. a body provided with a threaded main bore and including a first and second side face and an exterior surface therebetween, said exterior surface being adapted to receive a torquing force for initially tightening the combination of said arbor, tool, and spacer, 2. a plurality of threaded first bores in said body extending from said first side face to said second side face, 3. a plurality of jacking screws arranged so that a jacking screw is disposed within each of said first bores, each of said jacking screws being defined by: a. a head portion adapted to be engaged by suitable torquing means, the head portion of one of said jacking screws being engageable independently of the engagement of another of said jacking screws, b. an end surface portion of said jacking screw adapted to contact said second side face of said spacer, whereby when said jacking screw is rotated, said end surface portion is advanced into engagement with said spacer thereby to induce high axial pressure between said nut and said threaded shank portion to maintain a tightened combination, e. at least one second bore, including a threaded portion, in said body extending from said first side face to said second side face, f. a recess in said second side face of said spacer, said recess being defined by a smooth surface having a generally circular cross section to permit axial movement of a member disposed therein when a jacking screw is advanced, and g. a locking member having a threaded portion engaged with the threaded portion of said second bore and having an end portion generally complementary to said recess at least a portion of said end portion thereof being located in said recess in said second side face of said spacer in such a manner to permit axial movement therein, whereby said combination is additionally secured against unwanted rotation relative to said arbor.
Claim 3
Dependent Claim 20 words
a plurality of threaded first bores in said body extending from said first side face to said second side face,
Claim 4
Dependent Claim 20 words
a plurality of threaded first bores in said body extending from said first side face to said second side face,
Claim 5
Dependent Claim 39 words
The invention of claim 1 wherein said recess is a generally cylindrical bore in said spacer and said locking member is a boltlike structure having a generally cylindrical end portion engaged in said generally cylindrical bore in said spacer.
Claim 6
Dependent Claim 34 words
The invention of claim 1 wherein said nut further includes a pilot hole in said body extending from said first side face to said second side face for locating said recess in said spacer.
Claim 7
Dependent Claim 252 words
a plurality of jacking screws arranged so that a jacking screw is disposed within each of said first bores, each of said jacking screws being defined by: a. a head portion adapted to be engaged by suitable torquing means, the head portion of one of said jacking screws being engageable independently of the engagement of another of said jacking screws, b. an end surface portion of said jacking screw adapted to contact said second side face of said spacer, whereby when said jacking screw is rotated, said end surface portion is advanced into engagement with said spacer thereby to induce high axial pressure between said nut and said threaded shank portion to maintain a tightened combination, e. at least one second bore, including a threaded portion, in said body extending from said first side face to said second side face, f. a recess in said second side face of said spacer, said recess being defined by a smooth surface having a generally circular cross section to permit axial movement of a member disposed therein when a jacking screw is advanced, and g. a locking member having a threaded portion engaged with the threaded portion of said second bore and having an end portion generally complementary to said recess at least a portion of said end portion thereof being located in said recess in said second side face of said spacer in such a manner to permit axial movement therein, whereby said combination is additionally secured against unwanted rotation relative to said arbor.
Claim 8
Dependent Claim 252 words
a plurality of jacking screws arranged so that a jacking screw is disposed within each of said first bores, each of said jacking screws being defined by: a. a head portion adapted to be engaged by suitable torquing means, the head portion of one of said jacking screws being engageable independently of the engagement of another of said jacking screws, b. an end surface portion of said jacking screw adapted to contact said second side face of said spacer, whereby when said jacking screw is rotated, said end surface portion is advanced into engagement with said spacer thereby to induce high axial pressure between said nut and said threaded shank portion to maintain a tightened combination, e. at least one second bore, including a threaded portion, in said body extending from said first side face to said second side face, f. a recess in said second side face of said spacer, said recess being defined by a smooth surface having a generally circular cross section to permit axial movement of a member disposed therein when a jacking screw is advanced, and g. a locking member having a threaded portion engaged with the threaded portion of said second bore and having an end portion generally complementary to said recess at least a portion of said end portion thereof being located in said recess in said second side face of said spacer in such a manner to permit axial movement therein, whereby said combination is additionally secured against unwanted rotation relative to said arbor.
Claim 9
Dependent Claim 44 words
The invention of claim 1 wherein a plurality of recesses are located in said second side face of said spacer, any one of which may receive said end portion of a locking member for securing said combination against unwanted rotation relative to said arbor.

References Cited (Backward Citations)

US439660A Cited
US609144A Cited
US1097218A Cited
US2136592A Cited
US2812684A Cited
US2835518A Cited
US2953417A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-11-08 1975-05-10 1975-11-09 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-11-08 1979-05-10 1979-11-09 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-11-08 1983-05-10 1983-11-09 $7700.00 Window Closed / Lapsed

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