US3513599A - Mounting means for knife sharpener stone - Google Patents
Mounting means for knife sharpener stone Download PDFInfo
- Publication number
- US3513599A US3513599A US654725A US3513599DA US3513599A US 3513599 A US3513599 A US 3513599A US 654725 A US654725 A US 654725A US 3513599D A US3513599D A US 3513599DA US 3513599 A US3513599 A US 3513599A
- Authority
- US
- United States
- Prior art keywords
- shaft
- housing
- grinding wheel
- blade
- knife
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
- B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
- B24B3/54—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of hand or table knives
Definitions
- This invention relates to a means for mounting a blade grinding stone on a shaft to prevent the blade which is to be sharpened from being burned as the result of applying too much pressure against the grinding stone.
- Another serious problem confronting the neophyte blade sharpener is that of placing the proper amount of pressure against the grinding wheel with the knife blade. If excessive pressure is placed on the grinding stone by the knife blade the latter can be burned and its effectiveness can be lessened or eliminated entirely.
- FIG. 1 is a perspective view showing the inner subassembly removed from the housing
- FIG. 2 is an exploded view showing how the various parts cooperate
- FIG. 3 is a plan view showing elements partly in section
- FIG. 4 is a plan view showing details of the shaft mechanism partly in section
- FIG. 5 is a plan view showing the clip in two positions
- FIG. 6 is a partial cut away view showing the latch mechanism in open position
- FIG. 7 is a partial cut away view showing the closed position of the latch.
- FIG. 8 is a plan view taken along the line 88 of FIG. 6.
- FIG. 1 there is shown a housing 10 and an inner subassembly 11 which is received and latched within the housing 10.
- the housing 10 has a wall 12 hav-. ing an opening 13 therein.
- the housing 10 includes a second wall 14.
- Each wall 12 and 14 has a respective land 15 and 16 which extends away from the wall at a 92 degree angle.
- the wall 12 and the wall 14 are arranged at an angle of approximately degrees included between them; however any other suitable arrangement can be used. This angle permits a device such as scissors to be sharpened.
- One blade of the scissors is placed against the wall 14 and the flat side of the other blade is laid on the land 15.
- the land 16 is recessed down from the land 15 to provide clearance to compensate for thickness of the other blade.
- the scissors is lightly pressed forward to engage sharpening stone 45 which projects into land 15 through aperture 13.
- a partition 17 separates knife openings 18 and 19 as seen most clearly in FIG. 3.
- the openings lead to a sharpening stone to sharpen knife blades.
- the lower portion of the housing 20 is in the form of a truncated cone and is open at the bottom thereof for the reception of the inner subassembly 11.
- the housing 10 includes two depending fingers 21 although any number can be used and a bearing 22. The purpose for these elements will be described below.
- the inner subassembly 11 comprises a base 23 which can have two openings 24 therein enabling the housing to be secured to a power source.
- a base 23 which is preferably a plastic molding, however, any suitable material can be used, is a circular portion 25 having detents 26a and 26b formed in the periphery thereof.
- the detent 26a is formed to loosely engage the finger 21.
- the curvature of the detent 26a is gradual and leads to locking detent 26b.
- Locking detent 26b is formed by an are which is closer to the circumference of the circular portion 25 than the arc 26a.
- the detent 26a receives the finger 21 and upon rotation of the housing 20 cams the finger 21 into the detent 26b.
- journal 27 Formed integrally with the circular portion 25 is a journal 27 which can include a metal insert therein and includes reinforcing ribs 28 thereon.
- the shaft 29 is hollow for half of its length or at least to a portion past the notch 30 cut therein in the hollow portion of the shaft.
- the shaft 29 includes a threaded portion 31 thereon and a reduced diameter section 32.
- the threaded portion 32 is threaded into a mating shaft 33 having a threaded bore 34 therein.
- the hollow bore 35 of the shaft 33 has grooves 36 milled therein for the reception of a drive shaft of a motor unit (not shown).
- the motor drive shaft can have splines thereon which frictionally fit into the grooves 36. Any type of frictional engagement can be used between the motor drive shaft and the shaft 33. For example, a hexagonal drive connection could also be used.
- the shaft 37 includes a reduced diameter section 38 having a flat 39 formed on the surface thereof.
- the reduced diameter section 38 is located on the shaft 37 so as to be in alignment with the notch 30 when the shaft 37 is assembled within the outer shaft 29.
- Grooves 40 can be milled into the forward portion of the shaft 37. Instead of grooves this reduced diameter portion could be knurled so as to frictionally receive a conventional grinding Wheel 41.
- the grinding wheel can be pressed onto the shaft 37 or otherwise fixed thereto.
- An inner threaded bore 42 at the end of the shaft 37 receives a threaded plug 44 therein.
- a hexagonal stop 43 locates the plug within the bore 42. The end of the plug 43a is received within the bearing 22 in the housing 10.
- a second conventional scissors grinding wheel 45 is frictionally fixed to the shaft 37 in the same manner as the grinding wheel 41 and held fast by the plug 44.
- Washers 46 can be placed on either side of the grinding wheel 41 as separators.
- a felt washer 47 is frictionally engaged to the shaft 29. The washer 47 prevents bits of metal which have been ground oif blades from entering the notch 30 and the journal 27 which includes a bearing inaert.
- the shaft 29 is held in the housing 10 by thrust washers 48a and 48b.
- a spring Washer 49 loosely encircles the shaft 29 and this washer urges the washer 48b gently against the bushing of the bearing 27.
- the washer 50 on the shaft 29 cooperates with the spring washer 49 to hold the assembly towards an upper position.
- the shaft 37 is loosely received within the hollow shaft 29 and is free to rotate therein. Since the shaft 29 is driven directly by the motor, a spring clutch 51 is fitted within the notch 30.
- the clutch 51 is formed of a resilient rod having a loop therein, a straight arm 51a and a curved arm 51b.
- the curvature in the arm 51b has approximately the same inner radius as the outer circumference of the shaft 29.
- the notch 30 extends through to the inner shaft 37.
- the arm 51a of the clutch bears on the fiat 39 on the shaft 37 the rotation of the outer shaft 29 is transmitted through the clutch 51 to the inner shaft 37 and it rotates.
- the grinding wheels 41 and 45 fixed to the inner shaft also rotate and a knife blade extending within the slots 18 or 19 or a scissors blade extending within the opening 13 can bear on the respective grinding wheel face which has the proper sharpening angle preformed thereon and be sharpened. If excessive force, such as 1 to 3 ounces, is placed on the grinding wheel, the inner shaft 37 will be held stationary and the outer shaft 29 will slip and the circular portion of the inner shaft 37 will bear against the clutch arm 51a.
- the outer housing 10 and the inner housing 11 are assembled by placing the plug 43 which has a bearing surface 43a on the end thereof Within the aligning bearing 22.
- the depending fingers 21 are then placed Within the detents 26a.
- the fingers 21 are loosely received within the detents 26a because the inner end of the finger 21 lies on a radius from the center of the base 25 which is greater than the length of the radius to the center of the arc forming the detent 26.
- the are forming the detent 26b is on a radius which is greater than the radius to the fingers 21; therefore, the fingers 21 which are flexibly mounted are frictionally biased outward, and through their inherent resilience frictionally bear against the detent 26b and maintains the inner subassembly within the outer housing.
- the assembly 11 is 4 thus easily removed from the housing 10 for repair or cleaning.
- the grinding wheel 45 is then properly located Within the housing 10 with respect to the opening 13.
- the grinding wheel 41 is located with respect to the knife blade openings 18 and 19.
- the user places the shaft 33 over the motor drive shaft (not shown) and the unit is put into operation.
- the user can place a scissors in the open position on the lands 12 and 14 which places the scissors blade in contact with the grinding wheel 45 or a knife blade can be placed in either of the openings 18 and 19 and the blade contacts the grinding wheel 41.
- a knife sharpening device comprising,
- said slip clutch comprising a continuous rod formed of resilient material
- said rod being shaped to form overlapping arms which are resiliently biased together to frictionally maintain said first and second shafts joined and said arms being connected by a circular rod portion formed into a loop which extends laterally of the longitudinal axes of said first and second concentric shafts.
- the second rigid shaft has a flat portion formed in a portion of its diameter whereby (i) the other arm of said slip clutch removably engages said fiat portion to transmit the rotation of one shaft to the other and to preclude the transmittal of rotation when said slip clutch arm is on the circular portion of the diameter of the rigid shaft.
- a knife sharpening device comprising,
- said means comprising detents on said base and a cam which urges said finger outwardly from its rest position such that the finger locks the housing to the base under the influence of the resilient bias of the finger bearing against one of said detents.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Description
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US65472567A | 1967-07-20 | 1967-07-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3513599A true US3513599A (en) | 1970-05-26 |
Family
ID=24626016
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US654725A Expired - Lifetime US3513599A (en) | 1967-07-20 | 1967-07-20 | Mounting means for knife sharpener stone |
Country Status (1)
Country | Link |
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US (1) | US3513599A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4291502A (en) * | 1979-09-24 | 1981-09-29 | International Telephone And Telegraph Corporation | Grinding or polishing tool |
US4468894A (en) * | 1981-01-13 | 1984-09-04 | Hong Kee S | Electrically driven knife whetting machine |
US20060169124A1 (en) * | 2005-02-03 | 2006-08-03 | Pearl Musical Instrument Co. | Connector assembly for hi-hat stand |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2688857A (en) * | 1953-07-29 | 1954-09-14 | Jones Motrola Corp | Safety coupling for flexible shafting |
US2722783A (en) * | 1953-03-27 | 1955-11-08 | O'russa Lorence | Knife sharpener |
US2841926A (en) * | 1954-05-06 | 1958-07-08 | Supreme Products Corp | Knife sharpener casing |
US2898709A (en) * | 1957-04-01 | 1959-08-11 | Oster Mfg Co John | Electric motor driven knife sharpener |
US2948091A (en) * | 1959-06-19 | 1960-08-09 | Scott & Fetzer Co | Safety device |
US3071899A (en) * | 1961-02-24 | 1963-01-08 | Gen Electric | Knife sharpener |
US3376671A (en) * | 1966-01-10 | 1968-04-09 | Sunbeam Corp | Knife sharpener |
-
1967
- 1967-07-20 US US654725A patent/US3513599A/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2722783A (en) * | 1953-03-27 | 1955-11-08 | O'russa Lorence | Knife sharpener |
US2688857A (en) * | 1953-07-29 | 1954-09-14 | Jones Motrola Corp | Safety coupling for flexible shafting |
US2841926A (en) * | 1954-05-06 | 1958-07-08 | Supreme Products Corp | Knife sharpener casing |
US2898709A (en) * | 1957-04-01 | 1959-08-11 | Oster Mfg Co John | Electric motor driven knife sharpener |
US2948091A (en) * | 1959-06-19 | 1960-08-09 | Scott & Fetzer Co | Safety device |
US3071899A (en) * | 1961-02-24 | 1963-01-08 | Gen Electric | Knife sharpener |
US3376671A (en) * | 1966-01-10 | 1968-04-09 | Sunbeam Corp | Knife sharpener |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4291502A (en) * | 1979-09-24 | 1981-09-29 | International Telephone And Telegraph Corporation | Grinding or polishing tool |
US4468894A (en) * | 1981-01-13 | 1984-09-04 | Hong Kee S | Electrically driven knife whetting machine |
US20060169124A1 (en) * | 2005-02-03 | 2006-08-03 | Pearl Musical Instrument Co. | Connector assembly for hi-hat stand |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: NIHON SIBER HEGNER, K.K. Free format text: SECURITY INTEREST;ASSIGNOR:RONSON CORPORATION A CORP OF NJ;REEL/FRAME:004286/0886 Effective date: 19840314 |
|
AS | Assignment |
Owner name: SECURITY PACIFIC BUSINESS CREDIT INC., 228 EAST 45 Free format text: SECURITY INTEREST;ASSIGNOR:RONSON CORPORATION;REEL/FRAME:004304/0018 Effective date: 19840516 Owner name: LAZERE FINANCIAL CORPORATION 60 EAST 42ND STREET, Free format text: SECURITY INTEREST;ASSIGNOR:RONSON CORPORATION;REEL/FRAME:004304/0018 Effective date: 19840516 |
|
AS | Assignment |
Owner name: FOOTHILL CAPITAL CORPORATION, A CORP. OF CA, ILLIN Free format text: SECURITY INTEREST;ASSIGNOR:RONSON CORPORATION;REEL/FRAME:004431/0132 Effective date: 19850614 |
|
AS | Assignment |
Owner name: RONSON CORPORATION, NEW JERSEY Free format text: RELEASE OF SECURITY INTEREST IN PATENTS;ASSIGNOR:WELLS FARGO FOOTHILL, INC.;REEL/FRAME:022248/0313 Effective date: 20090209 |