US3734197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Knife structure for a knife reel
Assignee: RENTAL EQUIPMENT MANUF CO
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Filing: 1971-07-22
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Granted: 1973-05-22
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Expires: 1991-07-22
Abstract
Abstract A knife structure for the knife reel of a turf conditioning apparatus which is mounted upon a square sectioned reel shaft. The knife structure uses replaceable sickle blades. The base of each blade is abutted against an end of a rectangular spacer plate so that the two blades extend from the plate in spaced opposition. A cover plate at each side of the spacer plate overlies the spacer plate and the base edge of each of the blades so that the spacer plate and the base portions of the blades are sandwiched between the cover plates. Holes at each end of the cover plates register with holes at the base of the cutter blades to receive bolts, and the assembly is secured together by tightening these bolts with nuts. A square opening extends through the cover plates and the spacer plate at the center of the knife structure, this opening fitting securely upon the square shaft. Tubular spacers threaded upon the shaft hold the assembly in position.
Inventors
- 👤 C Zehrung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:44
CPC Classifications
B; B62; B62D; B62D51/00; B62D51/04; A; A01; A01B; A01B33/00; A01B33/08; A01B33/14; A01B33/142; A01B45/00; A01B45/02; A01B45/026
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
309 words
A knife structure for the knife reel of a turf conditioning apparatus and the like, wherein the knife reel includes a rotatable shaft having a section formed as a simple, regular polygon, and wherein the knife structure comprises, in combination therewith: a. a pair of blades formed as flat members, with each blade having a base edge and a side cutting edge; b. a rectangular spacer plate having: a thickness approximating but not exceeding the thickness of the blades, opposite ends against which the base edges of the blades may abut with the blades extending therefrom in spaced opposition to each other, and a hole at the center of the spacer plate formed as a simple regular polygon fitting upon the aforesaid shaft; c. a pair of cover plates arranged to lie against the sides of the spacer plate having a length exceeding the length of the spacer plate sufficiently to extend beyond each end thereof to lap against portions of blades abutted against the spacer plate, and a hole at the center of each cover plate in registration with the spacer plate hole and sized to fit upon the aforesaid shaft; d. a means to secure each blade to and between the extended lapping portions of the cover plates when the bases of the blades are abutted against the ends of the spacer; and e. said securing means includes at least two spaced, aligned holes arranged to pass through the lapping portions of the cover plates and the respective blade, said holes being located near the base edge of said blade, and a removable fastening pin means positioned through each aligned hole to retain said blade in abutted position against said spacer plate whereby the impact forces upon the side cutting edge are transferred to the abutting surface by fulcrum effect about the pin nearest the cutting edge.
Claim 2
Dependent Claim
309 words
A knife structure for the knife reel of a turf conditioning apparatus and the like, wherein the knife reel includes a rotatable shaft having a section formed as a simple, regular polygon, and wherein the knife structure comprises, in combination therewith: a. a pair of blades formed as flat members, with each blade having a base edge and a side cutting edge; b. a rectangular spacer plate having: a thickness approximating but not exceeding the thickness of the blades, opposite ends against which the base edges of the blades may abut with the blades extending therefrom in spaced opposition to each other, and a hole at the center of the spacer plate formed as a simple regular polygon fitting upon the aforesaid shaft; c. a pair of cover plates arranged to lie against the sides of the spacer plate having a length exceeding the length of the spacer plate sufficiently to extend beyond each end thereof to lap against portions of blades abutted against the spacer plate, and a hole at the center of each cover plate in registration with the spacer plate hole and sized to fit upon the aforesaid shaft; d. a means to secure each blade to and between the extended lapping portions of the cover plates when the bases of the blades are abutted against the ends of the spacer; and e. said securing means includes at least two spaced, aligned holes arranged to pass through the lapping portions of the cover plates and the respective blade, said holes being located near the base edge of said blade, and a removable fastening pin means positioned through each aligned hole to retain said blade in abutted position against said spacer plate whereby the impact forces upon the side cutting edge are transferred to the abutting surface by fulcrum effect about the pin nearest the cutting edge.
Claim 3
Dependent Claim
61 words
In the organization defined in claim 1, wherein the polygon defined by the sections of the shaft and the aforesaid holes in the spacer plate and in the cover plates is a square with the sides of all of the holes being oriented upon the respective plates in the same manner to permit them to lie together when upon the shaft.
Claim 4
Dependent Claim
28 words
In the organization defined in claim 1, wherein the blade is a triangular member with each side cutting edge converging from the base to a blunted apex point.
Claim 5
Dependent Claim
33 words
In the organization defined in claim 3 wherein the apex portion of the blade is bent laterally with respect to the rest of the blade to cut a wide pattern in the turf.
Claim 6
Dependent Claim
221 words
A knife reel assembly for use in turf conditioning apparatus or the like comprising a rotor arranged to be mounted for rotation about its longitudinal axis and a plurality of cutting knives mounted on and spaced longitudinally along said rotor, said cutting knife includes: a. blade means having a flat blade member which includes a base edge and a side cutting edge; b. spacer means including an elongated flattened member having means for mounting said member on said rotor for rotation therewith and abutting means disposed at one end of said member and arranged to abut against the base edge of the blade means whereby the blade means extends radially outward from said rotor; c. cover means comprising at least two generally flat members fixedly positioned on each side of the spacer means so as to overlap at least a portion of said blade means; and d. means for securing said cover means to said blade means, said securing means including at least two removable fastener means inserted through aligned holes through said cover means and said blade means, said aligned holes being located near the base edge of said blade means whereby the base edge is held rigidly against the abutting means during rotation so that the impact forces on the cutting edge will be transferred to the abutting means.
Claim 7
Dependent Claim
221 words
A knife reel assembly for use in turf conditioning apparatus or the like comprising a rotor arranged to be mounted for rotation about its longitudinal axis and a plurality of cutting knives mounted on and spaced longitudinally along said rotor, said cutting knife includes: a. blade means having a flat blade member which includes a base edge and a side cutting edge; b. spacer means including an elongated flattened member having means for mounting said member on said rotor for rotation therewith and abutting means disposed at one end of said member and arranged to abut against the base edge of the blade means whereby the blade means extends radially outward from said rotor; c. cover means comprising at least two generally flat members fixedly positioned on each side of the spacer means so as to overlap at least a portion of said blade means; and d. means for securing said cover means to said blade means, said securing means including at least two removable fastener means inserted through aligned holes through said cover means and said blade means, said aligned holes being located near the base edge of said blade means whereby the base edge is held rigidly against the abutting means during rotation so that the impact forces on the cutting edge will be transferred to the abutting means.
Claim 8
Dependent Claim
89 words
A knife reel assembly as defined in claim 5, wherein: said abutting means includes surfaces at each end of the elongated flattened member and the mounting means comprises an aperture provided at the mid-point of said member; said blade means include two flat blade members, the base edge of each blade member arranged contiguous to an abutting edge on said spacer means, and said cover means is arranged to overlap a portion of each blade member whereby said blades are secured against the abutting surfaces of said spacer means.
Claim 9
Dependent Claim
28 words
A knife reel assembly as defined in claim 6, wherein: lines extended along said cutting edge and said base edge of said blade members form an acute angle.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |