US3626499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Small-sized hoist device
Assignee: Kito KK
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Filing: 1969-02-19
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Granted: 1971-12-07
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Expires: 1989-02-19
Abstract
Abstract In a small-sized hoist device, an inner annular member disposed in spaced relationship to an outer annular member is employed in transmitting the input force to the drive shaft. The inner annular member is mounted and rotates with the shaft while the input force is delivered to the outer annular member which conveys the force through interlocking means to the inner member. The interlocking means comprises a cage member holding a plurality of balls which fit into continuous threads formed in the oppositely arranged facing surfaces of the inner and outer annular members.
Inventors
- 👤 Hideo Iwama
- 👤 Takeshi Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:14
CPC Classifications
B; B66; B66D; B66D3/00; B66D3/12; B66D3/14
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
189 words
A small-sized hoist device, also employable as a traction apparatus, comprising, in combination, a shaft; a hoist device for lifting, lowering and moving loads; optionally disengageable means interconnecting said shaft and hoist device; a first sleeve axially slidably mounted on said shaft and engaged with said shaft for rotation about its axis; a second sleeve embracing said first sleeve with radial clearance to form an annular space therebetween; a first helical thread-forming groove on the outer surface of said first sleeve; a second helical thread-forming groove on the inner surface of said second sleeve; said grooves having the same pitch; balls disposed at said annular space in said grooves; whereby said first and second sleeves are threadedly interconnected through said balls; hoist-operating means connected to said second sleeve to rotate the same; and coupling means operable, responsive to threading of said second sleeve along said first sleeve by operation of said operating means, to couple said sleeves for conjoint rotation with said shaft; and an annular cage positioned within said annular space and spaced from said first and second sleeves, said cage retaining said balls in predetermined spaced relation.
Claim 2
Dependent Claim
189 words
A small-sized hoist device, also employable as a traction apparatus, comprising, in combination, a shaft; a hoist device for lifting, lowering and moving loads; optionally disengageable means interconnecting said shaft and hoist device; a first sleeve axially slidably mounted on said shaft and engaged with said shaft for rotation about its axis; a second sleeve embracing said first sleeve with radial clearance to form an annular space therebetween; a first helical thread-forming groove on the outer surface of said first sleeve; a second helical thread-forming groove on the inner surface of said second sleeve; said grooves having the same pitch; balls disposed at said annular space in said grooves; whereby said first and second sleeves are threadedly interconnected through said balls; hoist-operating means connected to said second sleeve to rotate the same; and coupling means operable, responsive to threading of said second sleeve along said first sleeve by operation of said operating means, to couple said sleeves for conjoint rotation with said shaft; and an annular cage positioned within said annular space and spaced from said first and second sleeves, said cage retaining said balls in predetermined spaced relation.
Claim 3
Dependent Claim
65 words
A small-sized hoist device, as set forth in claim 1, wherein outwardly directed flangelike projections are formed on one end of said cage and extending outwardly into engagement with said second sleeve, and an annular member affixed to said second sleeve adjacent the flange end of said cage and arranged to prevent the displacement of said balls from between said cage and said second sleeve.
Claim 4
Dependent Claim
53 words
A small-sized hoist device, as set forth in claim 2, wherein said cage member has a plurality of separate spaced slots formed through its surface, said slots being disposed in substantially paralleL relationship for receiving said balls, said slots extending transversely to the direction of said grooves in said first and second sleeves.
Claim 5
Dependent Claim
46 words
A small-sized hoist device, as set forth in claim 3, wherein said grooves in said inner and outer sleeves comprise a concave surface formed in the surface of said sleeves to afford at least a plurality of punctiform contact locations between said balls and said sleeves.
Claim 6
Dependent Claim
40 words
A small-sized hoist device, as set forth in claim 3, wherein said grooves in said first and second sleeves comprise a continuous arc-shaped recess arranged to receive said balls, flatland surfaces being formed between the adjacent recesses of said grooves.
Claim 7
Dependent Claim
76 words
A small-sized hoist device, as set forth in claim 3, wherein said slots in said cage member have a width slightly less than the diameter of said balls and said cage being spaced slightly closer to said first sleeve than to said second sleeve whereby said balls are held by said cage within the groove in said outer sleeve and extend through the slots in said cage into engagement with the groove in said inner sleeve.
Claim 8
Dependent Claim
67 words
A small-sized hoist device, as set forth in claim 1, wherein said operating means comprises a ratchet wheel formed on the outer surface of said second sleeve, a changeover ratchet in engagement with said ratchet wheel, and a lever operatively engaged to said changeover ratchet for driving said ratchet wheel and in turn operating said hoist device through the interlocking engagement of said first and second sleeves.
Claim 9
Dependent Claim
23 words
A small-sized hoist device, as set forth in claim 7, wherein said first sleeve is secured to said shaft by a spline fit.
Claim 10
Dependent Claim
64 words
A small-sized hoist device, as set forth in claim 7, wherein said means for interconnecting said shaft and hoist device comprises a gearwheel positioned at one end of said shaft, gear means formed on said hoist device, and an interconnecting gear member arranged to optionally engage said gearwheel on said shaft and being in meshed engagement with said gear means on said hoist device.
Claim 11
Dependent Claim
77 words
A small-sized hoist device, as set forth in claim 1, wherein said coupling means comprises an outwardly directed flange at one end of said first sleeve and an outwardly directed flange at the corresponding end of said second sleeve, said flanges being in axially adjacent spaced relation; and a braking element interposed between said flanges and gripped between said flanges responsive to threading of said second sleeve along said first sleeve by operation of said operating means.
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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) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |