Patent US4413929A successfully refreshed from Google Patents.
US4413929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock bolt
Assignee: Kubota Corp
•
Filing: 1983-03-01
•
Granted: 1983-11-08
•
Expires: 2003-03-01
Abstract
Abstract A rock bolt comprising a bolt body, a bag member directly surrounding an outer periphery of the bolt body adjacent to one end thereof, retainer means from securely fixing the bag member direct to the bolt body, a first tube means for feeding packing material into the bag member and extending through the bag member and toward the other end of the bolt body. The packing material filled into the bag member acts to lid or plug the hole into which the rock bolt has been inserted.
Inventors
- 👤 Tomio Kigawa
- 👤 Kouetsu Fukui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:23
CPC Classifications
E; E02; E02D; E02D5/00; E02D5/74; E02D5/80; E02D5/805; E21; E21D; E21D20/00; E21D20/02; E21D20/021; E21D21/00; E21D21/0026; E21D21/0033; E21D21/0093; F; F16; F16B; F16B13/00; F16B13/14; F16B13/141
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
152 words
A rock bolt for insertion into a hole comprising: a rock bolt body; inflatable bag means surrounding the outer periphery of said body adjacent one end thereof; retainer means for securely fixing said bag means to said body; injection tube means extending from adjacent said one end of said body through said bag means for communicating with the interior of said bag means for feeding packing material into said bag means to inflate said bag means and also for communicating with the space defined between the walls of said hole, said bolt body, and said bag means for feeding said material into said space after said bag means is inflated, said tube means comprising a tube having a cut-out portion in said bag means; and exhaust tube means extending through said bag means from adjacent said one end of exhausting air from said space as said material is fed into said space.
Claim 2
Dependent Claim
152 words
A rock bolt for insertion into a hole comprising: a rock bolt body; inflatable bag means surrounding the outer periphery of said body adjacent one end thereof; retainer means for securely fixing said bag means to said body; injection tube means extending from adjacent said one end of said body through said bag means for communicating with the interior of said bag means for feeding packing material into said bag means to inflate said bag means and also for communicating with the space defined between the walls of said hole, said bolt body, and said bag means for feeding said material into said space after said bag means is inflated, said tube means comprising a tube having a cut-out portion in said bag means; and exhaust tube means extending through said bag means from adjacent said one end of exhausting air from said space as said material is fed into said space.
Claim 3
Dependent Claim
40 words
A bolt as in claim 1, wherein said injection tube means includes a first tube extending from adjacent said one end into said bag means and a second tube extending from the interior of said bag means into said space.
Claim 4
Dependent Claim
25 words
A bolt as in claim 1 or 2 wherein said retainer means comprises adhesive tapes for fixing said bag means at both longitudinal ends thereof.
Claim 5
Dependent Claim
55 words
A bolt as in claim 3, wherein said retainer means comprises adhesive elastic rings fitted about said body and a plurality of adhesive elastic leaves for retaining said first and second tube means on portions of said rings, said tapes being wound about the longitudinal ends of said bag means over said leaves and rings.
Claim 6
Dependent Claim
16 words
A bolt as in claim 1 or 2 wherein said retainer means comprises an adhesive agent.
Claim 7
Dependent Claim
34 words
A bolt as in claim 1 or 2 wherein said bag means comprises a sheet member formed into a cylindrical shape and having longitudinal ends thereof secured to the outer periphery of said body.
Claim 8
Dependent Claim
25 words
A bolt as in claim 1 or 2 wherein said bag means comprises a sheet member defining a tubular space for receiving said packing material.
Claim 9
Dependent Claim
12 words
A bolt as in claim 7, wherein said bag means is cloth.
Claim 10
Dependent Claim
14 words
A bolt as in claim 7, wherein said bag means is synthetic resin sheet.
Claim 11
Dependent Claim
29 words
A bolt as in claim 7, wherein said bag means is in the form of a strip including a space for receiving packing material and wound about said body.
References Cited (Backward Citations)
US3032115A
Cited
US3303244A
Cited
GB1007393A
Cited
US3259192A
Cited
US3289761A
Cited
US3393744A
Cited
US3492823A
Cited
US3494134A
Cited
US3518835A
Cited
US3685303A
Cited
CH564654A5
Cited
GB1550619A
Cited
US4247223A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-07 | 1987-05-09 | 1987-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-07 | 1991-05-09 | 1991-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-07 | 1995-05-09 | 1995-11-08 | $7700.00 | Window Closed / Lapsed |