US4355702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for injecting viscous materials
Assignee: Individual
•
Filing: 1981-10-13
•
Granted: 1982-10-26
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Expires: 2001-10-13
Abstract
Abstract A method and apparatus are disclosed for greasing an article such as a wheel bearing in a common vice including a housing defining an internal grease chamber including a first open end; a dished piston slideably insertable into said chamber, including a threaded aperture; a stem threadably mounted in the piston aperture; and a tapered spool compression application member disposed over the stem for forcing the piston against the grease to cause grease to pass through the piston and into the bearing.
Inventors
- 👤 William E. Shultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:05
CPC Classifications
F; F16; F16N; F16N3/00; F16N3/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
104 words
An assembly for packing wheel bearings and the like comprising: a cylindrical housing including a first closed end and a second open end; a piston adapted to be inserted into said housing said piston further including a first planar side and a second concave side; a stem secured to said piston and the like from said first side of said piston to said second means for communicating grease and the like; a spool slideably mounted on said stem including a conical end; and said bearing being positioned between said second side of said piston and said conical end of said spool during said packing.
Claim 2
Dependent Claim
104 words
An assembly for packing wheel bearings and the like comprising: a cylindrical housing including a first closed end and a second open end; a piston adapted to be inserted into said housing said piston further including a first planar side and a second concave side; a stem secured to said piston and the like from said first side of said piston to said second means for communicating grease and the like; a spool slideably mounted on said stem including a conical end; and said bearing being positioned between said second side of said piston and said conical end of said spool during said packing.
Claim 3
Dependent Claim
29 words
The assembly claimed in claim 1 wherein said stem further includes a handle pivotally mounted thereon, and extending along the axis of said stem in a first, stored position.
Claim 4
Dependent Claim
42 words
The assembly claimed in claim 1 wherein said piston includes a first, planar face and a second concave face, and said compression application member includes a first substantially conical end, said article being positioned between said concave face and said conical end.
Claim 5
Dependent Claim
47 words
The assembly set forth in claim 1 wherein said stem includes a handle pivotally connected thereto and moveable to a first stored position extending along the axis of said stem during said packing and to a second position transverse to said axis for removal of said piston.
Claim 6
Dependent Claim
21 words
The assembly as defined in claim 1 wherein said spool is tapered to an included angle in the range of 50°-110°.
References Cited (Backward Citations)
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US2168746A
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US2178816A
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US2187608A
Cited
US2601169A
Cited
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Cited
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Cited
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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) | 1985-10-25 | 1986-04-26 | 1986-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-25 | 1990-04-26 | 1990-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-25 | 1994-04-26 | 1994-10-26 | $7700.00 | Window Closed / Lapsed |