US3767266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resilient retaining means for connecting work tools and work tool holders
Assignee: Cincinnati Mine Machinery Co
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Filing: 1970-08-10
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Granted: 1973-10-23
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Expires: 1990-08-10
Abstract
Abstract This invention resides in providing a resilient, ring-like member between a work tool and a work tool holder so as, in many cases, to permit relative motion, axial and/or rotative, between them. The work tool and work tool holder are intended for use primarily in connection with mining, excavating and earth working machines and the like. The work tool may comprise elongated elements having a shank portion with a working tip at one end and a gauge-determining abutment surface at at least the other end. The work tool holders may comprise bodies having a shank receiving perforation and means in association with the bottom of the perforation having an abutment adapted to cooperate with the abutment on the work tool. The ring-like member may be positioned in a groove on the work tool with a portion thereof adapted to abut some part of the work tool holder or it may be located in a groove in the work tool holder with a portion thereof adapted to engage a shallow depression or the like in the work tool. The resiliency and shape of the ring-like member permits the work tool to be forced into the work tool holder whereafter it will often be movable with respect thereto but captively held. The ring-like member may be formed of metal or plastic and may have a variety of shapes, for the most part, however, having a generally cylindrical, at least in part, configuration. The working portion of this resilient, generally cylindrical, ring-like retainer is capable of axial elongation whereby to present a knock-in, pryout relationship between the work tool and work tool holder.
Inventors
- 👤 C Krekeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:02
CPC Classifications
E; E21; E21C; E21C35/00; E21C35/18; E21C35/19; E21C35/197
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
109 words
Retaining means for maintaining the shank of a bit and the like in the shank receiving perforation of a bit mounting means of mining and earth working machines, said retaining means comprising a resilient retainer, for removably connecting a bit and a mounting means, comprising a generally cylindrical member made of resilient material and capable of axial elongation, said member having a ridge-like abutment element thereon, whereby when said resilient retainer is located around a said bit shank within a said perforation the said ridge-like abutment element sets up a holding interference between said bit and said mounting means to prevent inadvertent removal of said bit from said perforation.
Claim 2
Dependent Claim
109 words
Retaining means for maintaining the shank of a bit and the like in the shank receiving perforation of a bit mounting means of mining and earth working machines, said retaining means comprising a resilient retainer, for removably connecting a bit and a mounting means, comprising a generally cylindrical member made of resilient material and capable of axial elongation, said member having a ridge-like abutment element thereon, whereby when said resilient retainer is located around a said bit shank within a said perforation the said ridge-like abutment element sets up a holding interference between said bit and said mounting means to prevent inadvertent removal of said bit from said perforation.
Claim 3
Dependent Claim
50 words
The retainer of claim 1 in which the retainer, shaped like an hour glass, is adapted to be received in a groove surrounding a perforation in a mounting means and said ridge-like abutment element is adapted to extend into a shallow groove provided in a bit positioned within said perforation.
Claim 4
Dependent Claim
28 words
The retainer of claim 2 in which said retainer comprises a pair of end members joined by a web, said ridge-like abutment element being located on said web.
Claim 5
Dependent Claim
42 words
The retainer of claim 3 in which said web is comprised of a plurality of members having spaces therebetween, there being a plurality of ridge-like abutment elements on said members, whereby dirt, debris, fines and the like may escape through said spaces.
Claim 6
Dependent Claim
28 words
The retainer of claim 3 in which the ends of each of said end members are spaced from one another, each of said end members being otherwise circular.
Claim 7
Dependent Claim
12 words
The retainer of claim 3 in which said end members are circular.
Claim 8
Dependent Claim
18 words
The retainer of claim 3 in which said web is continuous and said ridge-like abutment element is continuous.
Claim 9
Dependent Claim
38 words
The retainer of claim 7 in which each of said end members may be moved towards a closed condition whereby to reduce the diameter of said retainer and said web may be compressed whereby to elongate said retainer.
Claim 10
Dependent Claim
12 words
The structure claimed in claim 1 wherein said retainer is substantially barrel-shaped.
Claim 11
Dependent Claim
28 words
The retainer of claim 9 in which said retainer comprises a pair of end members joined by a web, said ridge-like abutment element being located on said web.
Claim 12
Dependent Claim
43 words
The retainer of claim 10 in which said web is comprised of a plurality of members having spaces therebetween, there being a plurality of said ridge-like abutment elements on said members, whereby dirt, debris, fines and the like may escape through said spaces.
Claim 13
Dependent Claim
18 words
The retainer of claim 10 in which said web is continuous and said ridge-like abutment element is continuous.
Claim 14
Dependent Claim
12 words
The retainer of claim 10 in which said end members are circular.
Claim 15
Dependent Claim
28 words
The retainer of claim 10 in which the ends of each of said end members are spaced from one another, each of said end members being otherwise circular.
Claim 16
Dependent Claim
38 words
The retainer of claim 14 in which each of said end members may be moved towards a closed condition whereby to reduce the diameter of said retainer and said web may be compressed whereby to elongate said member.
Claim 17
Dependent Claim
177 words
Retaining means for maintaining the shank of a bit and the like in the shank receiving perforation of a bit mounting means of mining and earth working machines, said retaining means comprising a resilient retainer, for removably connecting a bit and mounting means, comprising a generally cylindrical member made of resilient material and having a ridge-like abutment element thereon, said cylindrical member having a pair of end members, a web joining said end members, said ridge-like abutment element being located on said web, each of said end members defining the major part of an incomplete circle whereby there is a gap in said generally cylindrical member and whereby said generally cylindrical member may be squeezed to reduce the diameter therEof and whereby said web may be compressed to elongate said generally cylindrical member and whereby when said resilient retainer is located around a said bit shank within a said perforation the said ridge-like abutment element sets up a holding interference between said bit and said mounting means to prevent inadvertent removal of said bit from said perforation.
Claim 18
Dependent Claim
177 words
Retaining means for maintaining the shank of a bit and the like in the shank receiving perforation of a bit mounting means of mining and earth working machines, said retaining means comprising a resilient retainer, for removably connecting a bit and mounting means, comprising a generally cylindrical member made of resilient material and having a ridge-like abutment element thereon, said cylindrical member having a pair of end members, a web joining said end members, said ridge-like abutment element being located on said web, each of said end members defining the major part of an incomplete circle whereby there is a gap in said generally cylindrical member and whereby said generally cylindrical member may be squeezed to reduce the diameter therEof and whereby said web may be compressed to elongate said generally cylindrical member and whereby when said resilient retainer is located around a said bit shank within a said perforation the said ridge-like abutment element sets up a holding interference between said bit and said mounting means to prevent inadvertent removal of said bit from said perforation.
Claim 19
Dependent Claim
13 words
The retainer of claim 16 in which said web is one continuous member.
Claim 20
Dependent Claim
28 words
The retainer of claim 17 in which said generally cylindrical member is barrel shaped, said ridge-like abutment element being at the largest diameter of said generally cylindrical member.
Claim 21
Dependent Claim
29 words
The retainer of claim 17 in which said generally cylindrical member is hour glass shaped, said ridge-like abutment element being at the smallest diameter of said generally cylindrical member.
Claim 22
Dependent Claim
29 words
The retainer of claim 16 in which there are a plurality of webs having spaces therebetween, some at least of said webs having a said ridge-like abutment element thereon.
Claim 23
Dependent Claim
29 words
The retainer of claim 20 in which said generally cylindrical member is barrel shaped, said ridge-like abutment elements being disposed at the greatest diameter of said generally cylindrical member.
Claim 24
Dependent Claim
30 words
The retainer of claim 20 in which said generally cylindrical member is hour glass shaped, said ridge-like abutment elements being disposed at the least diameter of said generally cylindrical member.
Claim 25
Dependent Claim
152 words
In combination, a work tool having a gauge-determining abutment means thereon, a work tool holder having a perforation to just nicely receive said work tool, second abutment means cooperating with said gauge-determining abutment means to position said work tool in the said perforation of said work tool holder, and an axially elongatable resilient retainer to hold said work tool in said work tool holder, said retainer comprising a generally cylindrical ring-like member having a pair of circular end members, a web joining said end members, and a ridge-like abutment surface on said web, said end members and said web being made of resilient material, said retainer being located in a groove on one of said work tool and of said work tool holder and said ridge-like abutment surface engaging the other of said work tool and of said work tool holder to prevent said work tool from coming out of said perforation.
Claim 26
Dependent Claim
152 words
In combination, a work tool having a gauge-determining abutment means thereon, a work tool holder having a perforation to just nicely receive said work tool, second abutment means cooperating with said gauge-determining abutment means to position said work tool in the said perforation of said work tool holder, and an axially elongatable resilient retainer to hold said work tool in said work tool holder, said retainer comprising a generally cylindrical ring-like member having a pair of circular end members, a web joining said end members, and a ridge-like abutment surface on said web, said end members and said web being made of resilient material, said retainer being located in a groove on one of said work tool and of said work tool holder and said ridge-like abutment surface engaging the other of said work tool and of said work tool holder to prevent said work tool from coming out of said perforation.
Claim 27
Dependent Claim
44 words
The combination of claim 23 in which said groove is located adjacent one end of said work tool outside of said perforation and said ridge-like abutment surface is adapted to engage said work tool holder in the region of an end of said perforation.
Claim 28
Dependent Claim
42 words
The combination of claim 23 in which said groove is located on said work tool away from the ends thereof, said work tool holder having a depression therein within the region of said perforation, said ridge-like abutment surface extending into said depression.
Claim 29
Dependent Claim
39 words
The combination of claim 23 in which said groove is located in said work tool holder, said work tool having a shallow depression thereon away from the ends thereof, and said ridge-like abutment surface extending into said shallow depression.
Claim 30
Dependent Claim
104 words
The combination of claim 23 in which each of said end members is parted whereby to provide a gap in said generally cylindrical ring-like member, said groove for said generally cylindrical ring-like member being on said work tool, the diameter of said ring-like member in the region of said ridge-like abutment surface being greater than the diameter of said perforation, whereby when said work tool is forced into said perforation said ring-like member may contract and said web may flatten to allow said work tool to be positioned within said perforation, said ridge-like abutment surface being in position to engage said work tool holder.
Claim 31
Dependent Claim
41 words
The combination of claim 27 in which there are a plurality of said webs defining spaces therebetween, at least some of said webs having a ridge-like abutment surface thereon, whereby dirt, debris, fines and the like may escape through said spaces.
Claim 32
Dependent Claim
114 words
The combination Of claim 23 in which each of said end members is parted whereby to provide a gap in said generally cylindrical ring-like member, said groove for said generally cylindrical ring-like member being in said work tool holder, said work tool having a shallow depression thereon away from the ends thereof, the diameter of said ring-like member in the region of said ridge-like abutment surface being smaller than the diameter of said perforation, whereby when said work tool is forced into said perforation said ring-like member may contract and said web may flatten to allow said work tool to be positioned within said perforation, said ridge-like abutment surface extending into said shallow depression.
Claim 33
Dependent Claim
41 words
The combination of claim 29 in which there are a plurality of said webs defining spaces therebetween, at least some of said webs having a ridge-like abutment surface thereon, whereby dirt, debris, fines and the like may escape through said spaces.
Claim 34
Dependent Claim
141 words
Retaining means for maintaining the shank of a bit and the like in the shank receiving perforation of a bit mounting means of mining and earth working machines, said retaining means comprising a resilient retainer, for removably connecting a bit and mounting means, comprising a generally cylindrical ring-like member made of resilient material and being axially elongatable, said retainer comprising a pair of completely circular end members joined by a continuous web having a ridge-like abutment thereon, in its relaxed condition said retainer having a holding diameter, whereby in its elongated condition said retainer may be properly positioned and whereby when said resilient retainer is located around a said bit shank within a said perforation the said ridge-like abutment sets up a holding interference between said bit and said mounting means to prevent inadvertent removal of said bit from said perforation.
Claim 35
Dependent Claim
141 words
Retaining means for maintaining the shank of a bit and the like in the shank receiving perforation of a bit mounting means of mining and earth working machines, said retaining means comprising a resilient retainer, for removably connecting a bit and mounting means, comprising a generally cylindrical ring-like member made of resilient material and being axially elongatable, said retainer comprising a pair of completely circular end members joined by a continuous web having a ridge-like abutment thereon, in its relaxed condition said retainer having a holding diameter, whereby in its elongated condition said retainer may be properly positioned and whereby when said resilient retainer is located around a said bit shank within a said perforation the said ridge-like abutment sets up a holding interference between said bit and said mounting means to prevent inadvertent removal of said bit from said perforation.
Claim 36
Dependent Claim
140 words
Retaining means for maintaining the shank of a bit and the like in the shank receiving perforation of a bit mounting means of mining and earth working machines, said retaining means comprising an axially elongatable resilient retainer, for holding a said bit in a said mounting means in a knock-in, pry-out relationship, said retainer comprising a generally cylindrical ring-like member having a pair of generally circular end members, a web joining said end members, and a ridge-like abutment surface on said web between said end members, said end members and said web being made of resilient material, whereby when said resilient retainer is located around a said bit shank within a said perforation the said ridge-like abutment surface sets up a holding interference between said bit and said mounting means to prevent inadvertent removal of said bit from said perforation.
Claim 37
Dependent Claim
140 words
Retaining means for maintaining the shank of a bit and the like in the shank receiving perforation of a bit mounting means of mining and earth working machines, said retaining means comprising an axially elongatable resilient retainer, for holding a said bit in a said mounting means in a knock-in, pry-out relationship, said retainer comprising a generally cylindrical ring-like member having a pair of generally circular end members, a web joining said end members, and a ridge-like abutment surface on said web between said end members, said end members and said web being made of resilient material, whereby when said resilient retainer is located around a said bit shank within a said perforation the said ridge-like abutment surface sets up a holding interference between said bit and said mounting means to prevent inadvertent removal of said bit from said perforation.
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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |