US3827307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drag device for bendix-type rope starters
Assignee: Briggs and Stratton Corp
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Filing: 1973-07-12
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Granted: 1974-08-06
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Expires: 1993-07-12
Abstract
Abstract A drag device for retarding rotation of the driving clutch element of a Bendix-type engine starter comprises a friction member having jaw portions embracing said clutch element under converging bias and jaw actuating arm portions projecting radially to one side of said element. An elongated friction relieving element has at one end a highly eccentric cam lengthwise confined between the jaw actuating arms. Its other end is confined against orbital motion about the clutch axis. Orbital motion of the arms due to excessive friction angularly displaces the friction relieving member to cam the arms apart, thus diverging the jaws to relieve friction.
Inventors
- 👤 R Couchman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:33
CPC Classifications
F; F16; F16D; F16D41/00; F02; F02N; F02N3/00; F02N3/02; F02B; F02B1/00; F02B1/02; F02B1/04; Y; Y10; Y10T; Y10T74/00; Y10T74/13
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
313 words
In an engine starter wherein a helically splined connection between a drive member and a driving clutch element causes the latter to move axially toward and from engagement with a driven clutch element upon rotation of the drive member relative to the driving clutch element and constrains both clutch elements, when they are engaged, to rotate in one direction with the drive member, friction drag means for retarding rotation of the driving clutch element to provide for its axial movement without materially impeding its rotation with the drive member, said drag means comprising: A. a pair of jaw members; B. mEans connecting the jaw members in embracing relationship to the driving clutch element and yieldingly biasing them convergingly towards friction producing engagement with it; C. a jaw actuating arm for each jaw member, 1. said jaw actuating arms being disposed to one side of the driving clutch element to be moved orbitally about it by torque which it frictionally transmits to the jaw members when it rotates, 2. said jaw actuating arms being parallel to one another and spaced apart, and 3. each of said arms having a substantially rigid connection with its jaw member whereby lateral divergence of said arms effects divergence of the jaw members; D. an elongated friction relieving member having near one end thereof an elongated cam portion that is confined between said jaw actuating arms and is normally in contact with both of them along a substantial part of its length so that rotation of said cam portion relative to said arms effects divergence of the arms; and E. means confining the other end of the friction relieving member against motion orbitally about the axis of the driving clutch element so that orbital motion of said jaw actuating arms swings the friction relieving member about its said other end, thus rotating its cam portion relative to said arms.
Claim 2
Dependent Claim
313 words
In an engine starter wherein a helically splined connection between a drive member and a driving clutch element causes the latter to move axially toward and from engagement with a driven clutch element upon rotation of the drive member relative to the driving clutch element and constrains both clutch elements, when they are engaged, to rotate in one direction with the drive member, friction drag means for retarding rotation of the driving clutch element to provide for its axial movement without materially impeding its rotation with the drive member, said drag means comprising: A. a pair of jaw members; B. mEans connecting the jaw members in embracing relationship to the driving clutch element and yieldingly biasing them convergingly towards friction producing engagement with it; C. a jaw actuating arm for each jaw member, 1. said jaw actuating arms being disposed to one side of the driving clutch element to be moved orbitally about it by torque which it frictionally transmits to the jaw members when it rotates, 2. said jaw actuating arms being parallel to one another and spaced apart, and 3. each of said arms having a substantially rigid connection with its jaw member whereby lateral divergence of said arms effects divergence of the jaw members; D. an elongated friction relieving member having near one end thereof an elongated cam portion that is confined between said jaw actuating arms and is normally in contact with both of them along a substantial part of its length so that rotation of said cam portion relative to said arms effects divergence of the arms; and E. means confining the other end of the friction relieving member against motion orbitally about the axis of the driving clutch element so that orbital motion of said jaw actuating arms swings the friction relieving member about its said other end, thus rotating its cam portion relative to said arms.
Claim 3
Dependent Claim
13 words
said jaw actuating arms being parallel to one another and spaced apart, and
Claim 4
Dependent Claim
13 words
said jaw actuating arms being parallel to one another and spaced apart, and
Claim 5
Dependent Claim
29 words
its bight portion and other portions of its legs that extend between the bight portion and the jaw members providing said means connecting and convergingly biasing the jaw members,
Claim 6
Dependent Claim
29 words
its bight portion and other portions of its legs that extend between the bight portion and the jaw members providing said means connecting and convergingly biasing the jaw members,
Claim 7
Dependent Claim
59 words
The friction drag means of claim 1, further characterized by: F. means on said friction relieving member defining guide surfaces which project laterally from said cam portion and overlie opposite sides of each of said jaw actuating arms to confine the arms to convergent and divergent lateral motion while constraining the cam portion to rotation relative to the arms.
Claim 8
Dependent Claim
102 words
means cooperating with said yoke to confine said cam between the arms and to constrain the friction relieving member to angular motion substantially parallel to said arms; and C. means confining the other end of said friction relieving member against orbital motion about the axis of said clutch element but permitting the first mentioned end of the friction relieving member to swing about said other end thereof as the cam is carried by orbital motion of the arms, thereby enabling said angular motion of the friction relieving member to occur when there is excessive friction between the jaws and said clutch element.
Claim 9
Dependent Claim
102 words
means cooperating with said yoke to confine said cam between the arms and to constrain the friction relieving member to angular motion substantially parallel to said arms; and C. means confining the other end of said friction relieving member against orbital motion about the axis of said clutch element but permitting the first mentioned end of the friction relieving member to swing about said other end thereof as the cam is carried by orbital motion of the arms, thereby enabling said angular motion of the friction relieving member to occur when there is excessive friction between the jaws and said clutch element.
Claim 10
Dependent Claim
33 words
the part of the wire that connects said jaw portions serving to convergingly bias said jaws and thus tending to maintain them in friction producing clamping engagement with the driving clutch element, and
Claim 11
Dependent Claim
33 words
the part of the wire that connects said jaw portions serving to convergingly bias said jaws and thus tending to maintain them in friction producing clamping engagement with the driving clutch element, and
Claim 12
Dependent Claim
72 words
other portions of its legs remote from said part of the wire providing jaw actuating arms which are substanTially parallel to one another and which can be laterally diverged to relieve such clamping engagement of the jaws, said arms projecting to one side of the clutch element so that rotation of the clutch element tends to move the arms orbitally by reason of said engagement; B. an elongated friction relieving member having
Claim 13
Dependent Claim
72 words
other portions of its legs remote from said part of the wire providing jaw actuating arms which are substanTially parallel to one another and which can be laterally diverged to relieve such clamping engagement of the jaws, said arms projecting to one side of the clutch element so that rotation of the clutch element tends to move the arms orbitally by reason of said engagement; B. an elongated friction relieving member having
Claim 14
Dependent Claim
24 words
third portions of its legs that are adjacent to the jaw members and remote from the bight portion providing said jaw actuating arms, and
Claim 15
Dependent Claim
24 words
third portions of its legs that are adjacent to the jaw members and remote from the bight portion providing said jaw actuating arms, and
Claim 16
Dependent Claim
131 words
each of said arms having a substantially rigid connection with its jaw member whereby lateral divergence of said arms effects divergence of the jaw members; D. an elongated friction relieving member having near one end thereof an elongated cam portion that is confined between said jaw actuating arms and is normally in contact with both of them along a substantial part of its length so that rotation of said cam portion relative to said arms effects divergence of the arms; and E. means confining the other end of the friction relieving member against motion orbitally about the axis of the driving clutch element so that orbital motion of said jaw actuating arms swings the friction relieving member about its said other end, thus rotating its cam portion relative to said arms.
Claim 17
Dependent Claim
131 words
each of said arms having a substantially rigid connection with its jaw member whereby lateral divergence of said arms effects divergence of the jaw members; D. an elongated friction relieving member having near one end thereof an elongated cam portion that is confined between said jaw actuating arms and is normally in contact with both of them along a substantial part of its length so that rotation of said cam portion relative to said arms effects divergence of the arms; and E. means confining the other end of the friction relieving member against motion orbitally about the axis of the driving clutch element so that orbital motion of said jaw actuating arms swings the friction relieving member about its said other end, thus rotating its cam portion relative to said arms.
Claim 18
Dependent Claim
20 words
The friction drag means of claim 1 wherein a unitary length of resilient wire bent to substantially a U-shape has
Claim 19
Dependent Claim
10 words
The friction drag means of claim 3, further characterized by:
Claim 20
Dependent Claim
43 words
tip portions of the wire extending laterally from each jaw actuating arm transversely across the other arm to cooperate with said arms in defining a loop remote from the bight portion in which said cam portion of the friction relieving member is received.
Claim 21
Dependent Claim
43 words
tip portions of the wire extending laterally from each jaw actuating arm transversely across the other arm to cooperate with said arms in defining a loop remote from the bight portion in which said cam portion of the friction relieving member is received.
Claim 22
Dependent Claim
87 words
In an engine starter wherein a helically splined connection between a rotatable driver and a driving clutch element translates rotation of the driver relative to said clutch element into axial motion of said clutch element between a pair of defined positions, in each of which said connection constrains the clutch element to rotate with the driver, drag means for frictionally retarding rotation of the clutch element without materially impeding its rotation with the driver, said drag means comprising: A. a unitary substantially U-shaped yoke of resilient wire
Claim 23
Dependent Claim
87 words
In an engine starter wherein a helically splined connection between a rotatable driver and a driving clutch element translates rotation of the driver relative to said clutch element into axial motion of said clutch element between a pair of defined positions, in each of which said connection constrains the clutch element to rotate with the driver, drag means for frictionally retarding rotation of the clutch element without materially impeding its rotation with the driver, said drag means comprising: A. a unitary substantially U-shaped yoke of resilient wire
Claim 24
Dependent Claim
54 words
means on the friction relieving member defining a surface that opposes said cam portion and is engageable by said tip portions at their sides remote from the cam portion to cooperate with said tip portions in confining said cam portion against displacement out of said loop in directions lengthwise of the jaw actuating arms.
Claim 25
Dependent Claim
54 words
means on the friction relieving member defining a surface that opposes said cam portion and is engageable by said tip portions at their sides remote from the cam portion to cooperate with said tip portions in confining said cam portion against displacement out of said loop in directions lengthwise of the jaw actuating arms.
Claim 26
Dependent Claim
73 words
The drag means of claim 5 wherein said clutch element has a radially outwardly opening circumferential groove in which the jaws are received, further characterized by: said means confining the other end of the friction relieving member against orbital motion comprising a link connected between said other end and a fixed part of the starter to permit the yoke and the friction relieving member to accompany said clutch element in its axial movements.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |