Patent US3685265A successfully refreshed from Google Patents.
US3685265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutter cylinder lawn mower in which the cutter cylinder is arranged so as to be selfenergizing
Assignee: US Philips Corp
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Filing: 1970-09-25
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Granted: 1972-08-22
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Expires: 1990-09-25
Abstract
Abstract A lawn mower of the cylinder type having a frame which comprises two side parts extending in the direction of movement. A pivot which extends at right angles to the direction of movement, is secured in the side parts of the frame and a substantially Ushaped auxiliary frame is pivotable about the pivot. The limbs of the auxiliary frame carry a rotatably drivable cutter cylinder which is spaced from the pivot. The cylinder blades cooperate with a ledger blade secured in the frame. The limbs of the auxiliary frame extend from the pivot in a direction opposite to the direction of movement. The level of the pivot is adjustable so that during the cutting operation the cutting resistance of the herbage to be cut gives rise to a tangential force which acts on the cutting edges of the cylinder blades and creates a couple which produces a torque which causes the auxiliary frame to tend to pivot about the pivot in a clockwise direction, with the result that during the cutting operation an increased pressure of engagement is produced between the cutting edges of the cooperating blades.
Inventors
- 👤 Alexandre Horowitz
- 👤 Bernard Joseph Beusink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:28
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/42; A01D34/56; A01D34/58; A01D2101/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
228 words
A lawn mower of the cylinder type comprising a pair of spaced apart side frames, a plurality of transverse rods extended between the side frames so as to form a rigid frame construction, a pivot mounted between said side frames perpendicular to the direction of forward movement of the mower, a substantially Ushaped auxiliary frame member pivotally mounted on said pivot located between said side frames, the legs of said auxiliary frame member extending from said pivot in a direction opposite to the forward movement of the mower, a cutter cylinder rotatably mounted between the legs of said U-shaped frame member, a plurality of cutting blades located about the periphery of said cylinder, a ledger blade mounted between said side frames for cooperation with said cutting blades, adjusting means attached to said auxiliary frame so as to permit pivoting of said auxiliary frame about said pivot in a clockwise direction when resistance to the herbage to be cut is encountered, so that when said resistance iS encountered a tangential force is produced which will act upon the cutting surfaces of the cutting blades thereby creating a couple to produce torque acting on the auxiliary frame to tend to said pivoting of said auxiliary frame about the pivot so that during the cutting operation an increased pressure of engagement is produced between the cutting edges of the cooperating blades.
Claim 2
Dependent Claim
228 words
A lawn mower of the cylinder type comprising a pair of spaced apart side frames, a plurality of transverse rods extended between the side frames so as to form a rigid frame construction, a pivot mounted between said side frames perpendicular to the direction of forward movement of the mower, a substantially Ushaped auxiliary frame member pivotally mounted on said pivot located between said side frames, the legs of said auxiliary frame member extending from said pivot in a direction opposite to the forward movement of the mower, a cutter cylinder rotatably mounted between the legs of said U-shaped frame member, a plurality of cutting blades located about the periphery of said cylinder, a ledger blade mounted between said side frames for cooperation with said cutting blades, adjusting means attached to said auxiliary frame so as to permit pivoting of said auxiliary frame about said pivot in a clockwise direction when resistance to the herbage to be cut is encountered, so that when said resistance iS encountered a tangential force is produced which will act upon the cutting surfaces of the cutting blades thereby creating a couple to produce torque acting on the auxiliary frame to tend to said pivoting of said auxiliary frame about the pivot so that during the cutting operation an increased pressure of engagement is produced between the cutting edges of the cooperating blades.
Claim 3
Dependent Claim
31 words
The lawn mower according to claim 1 further comprising a casing mounted on said auxiliary frame within said cutting cylinder and a motor mounted within said casing for driving the mower.
Claim 4
Dependent Claim
28 words
The lawn mower according to claim 1 further comprising a driving motor mounted within said cutting cylinder and means connecting said motor with said cylinder for driving same.
Claim 5
Dependent Claim
75 words
The lawn mower according to claim 1 wherein said adjusting means comprises at least one projection attached to said auxiliary frame at the ends of the legs thereof remote from said pivot, said projection extending in an outward direction transverse to the direction of movement, a slot in the side frame for accommodating said projection and for allowing movement thereof, and a spring accommodated within said slot for engagement with and for supporting said projection.
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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |