US4494311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Meat trimming knife
Assignee: Bettcher Industries Inc
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Filing: 1982-10-13
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Granted: 1985-01-22
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Expires: 2002-10-13
Abstract
Abstract An improved manually manipulated meat trimming knife of the type having a handpiece which terminates at one end in a concave configuration on which is mounted a ring-shaped blade holder. A locking key is slidably mounted in a keyway formed in the concave end of the handpiece and is engagable with a ring-shaped cutting blade for releasably mounting the blade on the blade holder. A spring biased pin releasably secures the key in a forward engaged position with the cutting blade. One or more tabs are formed on the blade holder and form an arcuate groove for slidably receiving and supporting the blade therein. The tabs and locking key enable the cutting blade to be removed and installed on the holder without removing or loosening any mounting or adjusting screws.
Inventors
- 👤 Timothy J. McCullough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:30
CPC Classifications
B; B26; B26B; B26B25/00; B26B25/002
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
145 words
An improved meat trimming knife including: (a) a handpiece having a concavely shaped front end and a handle extending in a generally radial direction rearwardly from said front end; (b) a ring-shaped blade holder adapted to be mounted on the concave front end of the handpiece; (c) a ring-shaped cutting blade adapted to be rotatably mounted on the blade holder; (d) a locking key slidably mounted in a complementary shaped keyway formed in the handpiece for releasably retaining the cutting blade on the blade holder; (e) means operatively engaged with the locking key for locking said key in the blade retaining position; and (f) tab means formed integrally on the blade holder for releasably holding the cutting blade on the blade holder, with said tab means having an arcuate length of less than 160° and being shaped a predetermined arcuate distance from the locking key.
Claim 2
Dependent Claim
145 words
An improved meat trimming knife including: (a) a handpiece having a concavely shaped front end and a handle extending in a generally radial direction rearwardly from said front end; (b) a ring-shaped blade holder adapted to be mounted on the concave front end of the handpiece; (c) a ring-shaped cutting blade adapted to be rotatably mounted on the blade holder; (d) a locking key slidably mounted in a complementary shaped keyway formed in the handpiece for releasably retaining the cutting blade on the blade holder; (e) means operatively engaged with the locking key for locking said key in the blade retaining position; and (f) tab means formed integrally on the blade holder for releasably holding the cutting blade on the blade holder, with said tab means having an arcuate length of less than 160° and being shaped a predetermined arcuate distance from the locking key.
Claim 3
Dependent Claim
30 words
The meat trimming knife defined in claim 1 in which a spring biased pin is operatively engaged with the locking key to maintain said key in the blade retaining position.
Claim 4
Dependent Claim
45 words
The meat trimming knife defined in claim 2 in which a hole is formed in the handpiece adjacent the concave end; and in which a coil spring is seated in said hole and is engaged with the pin which is slidably mounted in said hole.
Claim 5
Dependent Claim
50 words
The meat trimming knife defined in claim 2 in which slot means is formed in the locking key for receiving the spring biased pin therein; and in which annular shoulder means is formed on the pin for engaging the slot means to maintain the pin in the blade retaining position.
Claim 6
Dependent Claim
22 words
The meat trimming knife defined in claim 1 in which the tab means includes a pair of tabs spaced approximately 135° apart.
Claim 7
Dependent Claim
22 words
The meat trimming knife defined in claim 5 in which one of said tabs is located approximately 105° from the locking key.
Claim 8
Dependent Claim
26 words
The meat trimming knife defined in claim 5 in which each of the tabs have an arcuate configuration each with an arcuate length of approximately 15°.
Claim 9
Dependent Claim
20 words
The meat trimming knife defined in claim 1 in which the blade holder has a diameter of approximately five inches.
Claim 10
Dependent Claim
25 words
The meat trimming knife defined in claim 1 in which the concavely shaped front end of the handpiece has an arcuate length of approximately 100°.
Claim 11
Dependent Claim
33 words
The meat trimming knife defined in claim 1 in which the tab means is formed integrally with the blade holder and forms an arcuate groove in which the cutting blade is slidably mounted.
References Cited (Backward Citations)
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US1552771A
Cited
GB788494A
Cited
US3269010A
Cited
US3852882A
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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) | 1988-01-22 | 1988-07-23 | 1989-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-22 | 1992-07-23 | 1993-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-22 | 1996-07-23 | 1997-01-22 | $7700.00 | Window Closed / Lapsed |